Model Airplane News 1930-11

SUNRISE MODEL AIRPLANES AND SUPPLIES!
Travel A ir M ystery Plane

The model shown here of the Travel Air
Mystery sure is a wow! Just look at that
streamlined fuselage, shiny wing, dummy
cowling, streamlined pants, colorful schemes,
and insignia. Don’t you wish you owned
this model? Yes, you can, simply send for
our complete construction set, which contains
all the wood parts, streamline pants, adjust
able propeller, stamped ribs, celluloid wheels,
full-sized plans, detail instructions, tissue,
glue, dope, and etc. It has a wing span of 30"
and lias flown as far as 400 feet and that is
darn good for a scale-model. Be the first to
have this model! Rush! Construe- co
tion set.........................................
The Sunrise Midget Curtiss Army Hawk

Here’s that model of the Curtiss Army Hawk you have been looking for. This model
Parasol Model is of 18" wing span and is just the size you want, and just the price you want to pay.
This Hawk is very easy to build, yet it looks like the real ship. Our construction set
contains all the necessary materials, and everything that you need. Satis
faction guaranteed! Construction set.......................................................... $ 1.15
This model is copied a fte r the fam ous parasol

ty p e of airc raft. T his model has a wing span
of 30" and weighs less th a t 1 oz. It has a
dum m y N. A. C. cowling, and stream lined
celluloid pants with wheels attach ed . This
model is very powerful, and has obtained a
duration of 2 m ins, outdoors. O ur k it contains,
full-sized plans, glue, dope, insignia, dum m y
celluloid cowling and pants, side panels cut
and everything! C onstruction $2 00
A model of this type won the scale-model
contest, held at Detroit this year, and B o e in g P u r s u it S h ip !
New M odel A irplane Supplies here is your chance to have that model
in your model airport. This model is
Below are listed several of our fam ous supplies capable of staying in the air for 30 secs,
of guaranteed q u ality com plete satisfaction or more and what’s more, 300 or 400 feet
or money back. Add 15c for postage. Send with ease! Our set contains the materials
Money Orders, and checks only. P rom pt
Service! necessary to build, with dummy motor,
adjustable prop., insignia, wood parts,
P L A N S (P la n s a r e P r e p a id ) glue, dope, tissue & etc. The best buy in
T rav el M y s te ry ......................................................... SO.50
town for its price. Construe- ^ Λ β % β \
M id g et C u rtiss H a w k ...................................................... 35 tion set....................................
M odel P a ra s o l.....................................................................35
Boeing P u r s u it................................................................... 50
Bowlus G lid e r..................................................................... 50
BALSA WOOD
A Model of That Bowlus Albatross Soarer!
H e re ’s th a t Bowlus S oarer,
2" X 6 " X 3 6 " .................................................... S I.00 th a t you have been looking
1 /8 " X 6" X 3 6 " .......................................................... 50 for. T his model G lider is c a
l/1 6 " x 6" X 3 6 " ...........................................................35 pable of s ta y in g up in the
1 /32" X 6" X 3 6 " .......................................................... 35 a ir for m ore th a n 2 m ins.
1 /8" X sq. X 3 ' ..................................................................03 It has a wing spread of 48"
1 /8 " X1 /2" X 3 '..............................................................07 and an overall length of 18".
3 /1 6 " X 1/2" X 3 '..............................................................07 J u s t im agine ta k in g this 4-ft.
3 /8 " sq. X 3 ' ........................................................................07 Model G lider o u t into the
1 /8 " X 1 /4 " X 3 ' ..............................................................04 open, for the first tim e, and
3 /1 6 " sq. X 3 ' ......................................................................05 few m in u te s la te r, seeing its
1 /4 " X 1/4" X 3 '..............................................................07 long and tapered wing and
3 /8 " X1 /2" X 3 ' ..............................................................09 shining silver fuselage ta c k
Colorless A m broid, 2 o z ..................................................28 ing and tu rn in g and flowing
B anana Oil. 1 oz. 15c, 2 o z ........................................... 20 w ith and a g a in st the w ind,
D ope, an y color, 1 oz. 15c. 2 o z ..................................30 400 or 500 and even 600 feet
Jap an ese Silk tissue, 5c per slit., 25 s lits .............. 1.00 above th e e a rth . Y es sir!
B am boo strip s, 12" lc, 15" 2c, 1 9 "........................... 03 J u s t im agine! O u r k it con
Reed, a n y size per f t ........................................................01 ta in s all the p a rts, such as
M in iatu re D u m m y m o to r.............................................. 75 in stru c tio n sheets, full size
D u m m y co w lin g ................................................................ 35 plans, glue, dope, pap er, wood
C elluloid S tream lin ed P a n ts — w ith wheels cut to sizes, and launching
a tta c h e d ....................................................................... 50 equipm ent. Satisfaction g u a ra n te ed ! C onstruction S e t—(P o stp a id in U . S.)
A rm y insignia, per s e t ..................................................... 15
A djustable alu m in u m p ro p e lle r............................ 75
$ 2 .0 0
(C anada, $2.50) ......................................................................................................................................
R u b b er S tran d s, a n y size, per ft. lc, 3 /1 6 " S e n d s 10c now f o r o u r c om ing i l l u s t r a t e d c a t a l o g , now g o in g t o p r e s s ! N ew models,
flat, 1-1 /2c n e w s u p p li e s , e tc .
SUNRISE MODEL AIRPLANE SUPPLY CO. Dept. A - l l , Cedarhurst,N.Y.

November, 1930 J U N I O R M E C H A N I C S AND MO D E L A I R P L A N E N E WS 1
EVERY RED — B L O O D E D
k AMERICAN BOY
&
Here you are young fellow. T his is th e plane you will w a n t to build. T his C urtiss
Falcon M odel M ail P lan e h a s established m ore records and won m ore c o n tests th a n any
o th er m odel plane. We are reserving a com plete c o n stru ctio n k it of th is fam o u s plane
for you—t h a t is if you a c t quickly. It is easy to build and g u a ra n tee d to fly. W orking
draw ings and com plete in stru c tio n s accom pany each k it an d you m ay have it FREE
Join the A B A —W ear the W ings!
M odel A ircra ft D e p a rtm e n t T his Is W h a t You Get:
Thos. L. Bulger, acknowledged to 1. The Curtiss Falcon Model Mail
be the country’s foremost authority Plane Construction Kit.
on designing and building model air You will be proud to w ear your golden wings and
craft conducts a practical department display your card in th e A viation Boosters of 2. Golden A B A Wings.
on A m erica to prove you are an av iatio n e nthusiast.
3. Annual Membership Card in the
T h e wings and yearly m em bership card, en titlin g
M odel B uilding you to all the privileges of the organization, are Aviaton Boosters of America.
given free to all subscribers of th e N ational G lider,
in the National Glider. th e new est and livest m agazine in th e U nited 4. A Complete and Practical Home
S ta te s devoted to aviation. Study Course in Aviation.
Each month will appear the latest Gliding, th e new est popular and fascinating sport,
designs and constructional drawings, is conceded to be the m ost econom ical and the 5. Many Working Scale Drawings
with accurate scale plans of indoor safest m ethod of flight-training. N a tional G lider, and complete detailed instructions
and outdoor model airplanes from th e M agazine of P ractical A viation edited by
L ieu t. E. Sticri, is published prim arily for the to enal e you to build all kinds
all parts of the world. Listed below ad v an c e m e n t of a u th e n tic know ledge of this of model airplanes and gliders.
are some of the model types that will p opular and safe sport. E very issue contains not
be featured in future issues of this only th e la te st news profusely illu stra te d , showing 6. The latest, authoritative informa
th e progress a nd rapid developm ent being m ade tion relative to gliders and prac
fascinating and instructive magazine: b o th by gliders a nd powered craft, b u t also articles
of in te re st w ritten by a v ia tio n 's o u tsta n d in g tical aviation.
Curtiss Robin "Baby” Junkers au th o rities.
Stinson Travel Air 7. Free information service and an
D. Ο. X. Commandaire O u tstanding A uthorities swers to puzzling questions on
Spad Davis Monoplane aviation.
Condor Hawk C o n trib u te
M ajor VV. L. Purcell, a recognized a u th o rity on 8. An opportunity to win a sub
Bird Biplane Bowlus Glider a v iation, form erly D irector of th e R oosevelt stantial part of SL000.00.
A viation School, is conducting in this m agazine a
Q uestions a n d A nsw ers com plete "H om e S tu d y Course in A v iatio n ." This 9. An opportunity for your Glider
This valuable department is con course should be read by every person in terested in
av iation. F ascinating and in stru ctiv e articles by
Club to win a $600.00 primary
ducted for the benefit of our readers men fam ous for th e ir air exploits such as Hawley training glider.
as an added additional feature. Bowlus, C apt. F rank M. Hawks, R oger Q. W illiams,
All this and more.
A n th ony Fokker, M ajor V ictor W . Pagč and
others equally renow ned appear in every issue.
Send N o
Set
Money
■
T H O M A S L. B U L G E R , JM -02
R o o m 329, 370 S e v e n t h A v e ., Ne w Y o r k , N. Y.
S u re— I 'm in te r e s te d . Sen d m e th e N a tio n a l G lid er,
t h e M a g a z in e of P r a c tic a l A v ia tio n , for th e n e x t tw e lv e
m o n th s a n d ru sh m e m y C u r tis s F a lc o n M o d el K it,
m y M e m b e rsh ip C a rd in th e A v ia tio n B o o ste rs of
A m e ric a a n d m y G o ld e n W in g s. I will p a y th e p o s t
m a n S I .50 (S2.00 in C a n a d a ) p lu s p o sta g e . S t a te ______________
J u n i o r M echanics
and
M odel A irpla n e N e w s
C O N T E N T S , N O V E M B E R , 1930 ) lIn
n (O u r N e x t
Issu e
Page December is holiday time, bringing
the resultant empty pockets when
Special Course in Air Navigation.................. Capt. Leslie S. Potter 4 gift-giving is over. Why not make
some gifts yourself? Ever stop to
Continuing the Mainstay of Successful Piloting think how inexpensive it would be
and how much greater the apprecia
From the Ground U p ....................................................... Frank Pierce 6 tion of such a gift, let alone the
Quick Action is Called For and Larry Takes a Long Chance actual enjoyment for yourself in
making them?
Gliding and Soaring.....................................Percival and Mat White 9 Next month’s issue contains com
Another Article in the Manual of Motorless Flight plete instructions for making wonder
ful gifts for the various members pf
A Course in Airplane Designing.....................................Ken Sinclair 12 the family.
Part Twelve In the meantime, you model air
plane enthusiasts need not think
How to Build a Curtiss “Condor” ............................Jesse Davidson 13 you’re being shoved off the map.
You’re very much among those
Plans for Making a Solid Scale Model of the present in December’s issue.
U . S. Army Bomber In it you will find plans for making
something decidedly original in
Mechanical News in Pictures........................................................... 20 model airplanes along scientific lines
—a pusher biplane. This was de
Here’s a Novel Light to Make Yourself................Evert T . Hamby 21 signed especially for M o d e l A i r p l a n e
Full Construction Data for an Inexpensive Fixture N e w s by the man you all know,
Prof. T. N. de Bobrovsky of the
Mechanical Cameragrams........................................................................ 26 Aeronautical Research Laboratory at
Secaucus, N. J.
A Safe and Handy Tool P anel......................... Edwin T . Hamilton 27 The Gliding and Soaring series is
You Can Build This Easily and Cheaply still going strong, as well as the
courses in Air Navigation and in Air
More Mechanical Views........................................................................ 30 plane Designing.
Then comes the thrill of a lifetime
How to Build a Cabin-Boat......................................... Stuart Palmer 31 in die way of stirring fiction! The
Prepare Now for Your Next Vacation Mystery of the Silver Dart, a fast-
moving story of intrigue and ad
News Views of Mechanical N ature....................................................... 34 venture against the vibrant back
ground of the secret service, will
W hittling for F u n ................................................ Theodore Orchards 35 start in the next issue.
Wood + Knife = Several Natty Articles It’s your own fault if you miss the
rare treat in store for you in the
Handicraft Hints for the Junior Mechanic................ Chuck Stewart 37 December issue of J u n i o r M e c h a n i c s
a n d M o d e l A ir p l a n e N e w s . On all
Several Useful Articles to Make news stands November 23 next, and
only 15c a copy.
P u b lis h e d M o n th ly by M O D E L A I R P L A N E N E W S P U B L I S H I N G C O R P .. W a sh in g to n a n d S o u th A ves., D u n c ile n . N .J J .

E d ito ria l a n d G e n e ra l Offices. M a cfa d d e n B uilding. 1926 B ro a d w a y . N . Y.
J a m e s E . W illia m so n , P resident Ire n e T . K e n n e d y , Treasurer W esley I '. P a p e , Secretary
J . W . L e B a ro n . A d vertisin g M anager. G ra y b a r B uilding, 420 L e x in g to n A ve., N ew Y ork. N . Y.
E n te re d a s se co n d -c la ss m a tte r J u n e 5 th . 1929, a t th e P o s t Office a t D u n ellen . Ň. J .. u n d e r th e A c t of M a rc h 3 rd . 1879.
A d d itio n a l e n tr y a t N ew Y ork. N . Y.
C o p y rig h t, 1930. b y M O D E L A I R P L A N E N E W S P U B L I S H I N G C O R P . C o p y rig h t also in C a n a d a a n d G r e a t B rita in . All rig h ts reserv ed .
P ric e 15c a copy in U . S. a n d in C a n a d a . S u b s c rip tio n p rice S1.50 a y e a r in th e U n ited S ta te s a n d its possessio n s; a lso C a n a d a . C u b a . M exico .an d P a n a m a .
All o th e r c o u n tries S2.00 p e r y ear.
______________ _33 N o r th M ich ig an A ve., C . H . S h a ttu c k , M a n a g e r.
L o n d o n A g e n ts; A tla s P u b lish in g & D is tr ib u tin g C o.. L td .. 18 B ride L a n e , L o n d o n , E . C .
C ontributors are especially advised to be sure to retain copies o j their contributions; otherwise they are ta kin g unnecessary risk. Every possible effort w ill be made in our
organization to return unavailable m a nuscripts, photographs ana drawings. (i f accompanied by postage), but we w ill not be responsible fo r a n y loss o f such matter contributed.
P R IN T E D BY T H E A R T C O L O R P R I N T I N G C O ., D U N E L L E N . N . J . , U . S . A .
2
November, 1930 J U N I O R M E C H A N I C S AND MO D E L A I R P L A N E N E W S 3
Illustration Made
from Photograph.
20 in. C abin T ype
F e ath erw eig h t M odel
C om pleted W eight: 1 oz.
IDEAL
“EAGLET”
A Trium ph of Beauty C onstruction Γ~ /A
Simplicity and Action! Set Contains \ I 1
T HE most remarkable little ship you ever saw;
a real reproduction of present-day commercial
th ese parts: V -/ *
Airplanes! Nothing like it ever offered before.
A complete, 20 in. wing span Model made en Form ed
tirely of balsawood (not cardboard) and guar Propeller
Shaft
anteed to fly when correctly constructed, for
only 50 cents! ! You can build and fly a whole
squadron. Has many features found in more
expensive Models, and parts, as shown here, Propeller
come ready to use in Construction Set with Plan H anger
and Directions.
R ear R ubber
Build and Fly Your “EAGLET” Now! H ook
Get an “EAGLET” now and have some sport.
You can build it easily, in a short time. Color P a te n te d
it to suit your personal preference, and you’ll W ing Clip
have a Model that will be the envy of all your
friends—and for only 50 cents. Send your order
right away and we will deliver your Set postpaid.
Send 5c for Catalog and Circular
Showing M any New IDEAL Models 7 Y i inch
Form ed
Special Circular, just out, illustrating the newest ideas Balsa
in Flying Models; also the big 48-page IDEAL Catalog of Propeller
Models, Parts, Supplies and Fittings—all for 5c. R u b b er M otor— Jap a n -tissu e C overing P a p e r— C ellophane for
W indows— Propeller Shaft W ashers and E yelet—
In stru ctio n Sheet containing P lans and D iagram s
IDEAL A ER O PLA N E & SUPPLY CO., Inc ♦ All parts, fittings and materials needed to construct the
The Most Reliable Name in Model Airplanes fo r 20 Years complete model are included in this Set; the builder need
20-24 W e s t 19tH S t r e e t , N ew Y o rk C ity supply only glue and such coloring material as may be
Canadian Distributors: Canadian Model Aircraft, 344 Victoria Avenue, Montreal desired to dress the model in the color scheme wanted.
A Pioneer Octant
Sp ecial C o u r s e in A i r N a v i g a t i o n
TN the following series of articles, the author has common-sense reasoning. The ivhys and wherefores_of
-*■ endeavored to set out as clearly as possible, and in all the facts will only be given where they are necessary
as simple words as possible, the art of navigation in to understand the facts, as it is considered that in a
the air. \ short course too many of these would be confusing and
Your interest in these will depend on your interest in apt to mislead the reader.
flying, andl whether, you will consider yourself a pilot If some of the points seem too elementary do not.
when yoti have learned to take a pass them by, there is a reason
plane off the ground and bring it for their inclusion, if some points
down again without breaking any- do not seem clear, be patient, you
* thing. will generally find some informa
To those who do, these articles tion further on, that will clear
trill be valueless, but to those who them up as you -proceed. Answer
aspire to be more than fair the questions at the end of each
weather pilots, to be able to fly article and wait for their solu
from place to place without sole tions in the next issue, and should
recourse to roads and railways, you find any points requiring fur
to be able to fly above the clouds ther explanation, send a tetter
with safety if they are too low to with a stamped, addressed enve
admit of safe flying beneath them, lope to the editor setting out your
an intelligent interest in these problems and a reply will be sent
articles will be of incalculable you explaining the points raised.
value. Keep all your copies of M odel
Air navigation is not a compli A irplane N ews for future refer
cated subject, an intense knowl ence, you will probably need them
edge of mathematics and trigo to refer to as you go on.
nometry is not necessary, merely
the average person’s powers of Fie. 2 . AIR SPEED INDICATOR T iie E ditor.
4
The Mainstay of Successful Piloting
E have previously dealt with magnetic and
W earth inductor compasses. This month, we

will discuss the functions and workings of
other instruments essential to air naviga
tion to insure success during a (light.
At this point in the series of articles on this subject,
I should like to reassure those readers who have been
following the articles intelligently. You may meet
pilots who will look at you with a superior smile when
you talk of air navigation. They may loftily explain A P io n e er W in d a n d D rift
M e te r for use in a irp lan e s.
that “give them a map and they'll get anywhere”. These T h is is one o f th e m o st
are the pilots Who Do Not Know Enough. If valu ab le in s tru m e n ts a n
you are going to follow a road or a railway track to aerial n a v ig a to r can
your destination, even though you cut off corners, possess (F IG U R E 5)
you might just as well travel by automobile or train— C o u r te s y
P io n e e r I n s t r u m e n t Co.
the chief advantage of air travel is being thrown
away.
A day is going to
come not so far
ahead in this coun
try—it has already
arrived in Europe,
when all transport
pilots will be com
pelled to pass a tolerably searching examination on
navigation. This will be hastened when owners and
companies realize the thousands of dollars that can
be saved them yearly by the pilot who, through suc
cessful navigation, saves ten minutes’ Hying time on
a run of 200 miles, a saving which would be very easily
effected on this distance.
With this word of encouragement we will continue
by reminding you that successful navigation is impos
sible with inaccurate instruments and that all naviga
tors should be familiar with the principles of the vari
ous instruments used. The calibration, that is to ing down the tube passes into the back of the indicator
say, the adjustment and correction of his instruments where it distends a diaphragm or chandler to an extent
is also the responsibility of the navigator; but since depending on the amount of the airllow, or, in other
in very few places will the necessary facilities, instru words, the amount of the speed. A mechanism con
ments, etc., exist for the calibration of instruments, nects the movements of the diaphragm or chamber witli
it is not proposed to deal with this here. a pointer on the dial, which then records the airspeed.
Air Speed indicator. This con See Figs. 1 and 2.
sists of a pressure head connected Roth of these tubes must be
by metal tubes with the instru kept clean and free from obstruc
ment proper. The pressure head tions, pieces of dirt, etc., the holes
is made up of two tubes about one in the static tube kept clear, rub
sixth of an inch in diameter (the ber joints watched for signs of
diameter varies, of course, with perishing and no dents allowed in
different instruments), which are the metal tubing. Any of these
clamped together, one above the will cause a false reading.
other, on an outer strut of the It must also be remembered
airplane. One, the pressure tube, that owing to the varying densi
is open to admit the airllow, ties of air at various heights, an
and the other, the static tube, is allowance has to be made for this,
closed but for small perforations and you must add 1 3/1% to the
along the side which ensure air speed shown in the dial for
that the air pressure inside the every .1,000 feet of height. If your
tube is the same as that out dial showed you a speed of 100
side it. m.p.h. and you were at a height of
The tubes have to be fixed when l, 000 feet, your true speed would
the plane is in living position and be 101 3/4 m.p.h.; and if you were
have to be clear of any propeller at 10,000 feet it would be 117.5
slipstream. The How of air com- Fis.4. A N E R O ID A L TIM E TE R m.p.h. (Conlinned on page 38)
5
that Larry had strapped
^
T A B R Y P R I C E had
been adopted in his
early childhood bp the Bas
F rom himself in. When they
landed, Larry tried to save
setts, and although he teas lleinze from reproof by say
unhappy with them, had ing that lleinze was just
worked on their farm ever trying to scare him a little.
since. t h e G r o u n d A t the aid station Major
Riddle questioned Larry
On his eighteenth birth
day he was bicycling along concerning his discovery of
the road home from town,
when his attention was at
tracted to a group of air
planes overhead. Larry was
greatly interested in avia
LI p the bullet holes, and later
concerning his personal life
and his desire to become a
flyer.
A.s· they talked, Major
tion, and tcished to be a Riddle felt a genuine liking
flyer himself. and sympathy for this lad
Suddenly he noticed that By F ran k P ierce who had saved his life, and
the last of the group of whose hopes and ambitions
planes started to sideslip and that flames enveloped its were so much like those of his own youth.
cockpit. When he realized that the pilot teas descending * lie thanked Larry and asked him how he could get in
in his parachute, drifting dangerously near the river, touch with him. They then shook hands and Larry, ex
Larry, too, sped in that direction. hilarated, went back to his humdrum existence on the
With difficulty he located the pilot, whom he found farm.
injured, and dragged him to a safe place. By that time
FAlv from cordial welcome awaited him at
Δ
the other pilots landed to look for their missing comrade.
Larry helped make the famous ace, and now superin home. 31 r. Bassett grpwled at him for stay
tendent of Plank Field, Major Billy Riddle, more com ing away all day, though Mrs. Bassett had
fortable and assisted in examining’the wrecked plane, hinted that morning that they would let
lie discovered three bullet holes in the tank. Larry oil’ some of the usual work, since it was his birth
It was arranged that Larry go to Plank Field with day. But now they resented his absence, and when they
them, and he teas assigned to go along with lleinze, who heard his story they remained silent, seeming to Larry
had kept himself eccentrically apart from the others. to resent the wonderful adventure he had had.
Larry remembered the strange look on the man’s face The next morning he took up the usual round of his
when he saw Larry discover the bullet holes. life, but his mind was not on it. lie wanted to run
Once in the air, lleinze put his plane through a series over to the field to see how the Major was. In his mind
of wild maneuvers, until another pilot passed by and he pictured the planes coming and going, like eager
shouted angrily at him. Larry recalled. too, that lleinze active birds, on Plank Field. In burning, vivid detail
knew this was his first flight, and that he did not know he recalled his thoughts and sensations as he had flown
6
Suddenly
Quick Thinking and
Q uicker Action
Is Called Lor and Up
Among the Clouds Larry
Takes a Long Chance—
illustrations by
F. A le x an d e r
Flying in perfect military

formation, on came the en
tire fleet of Plank Field
mechanical bird that approached him. It came

nearer and nearer. His heart beat quickened
as it headed directly for the Bassett farm.
Then it passed over and Larry’s heart
dropped. But suddenly it circled back, com
ing lower and lower. Now it was but little
more than a hundred feet up. The roar of its
engine rose to a swift and booming crescendo
of power as it swooped down. Then it passed,
ami as it passetl a gleaming object fell from
from Las Vegas River to Plank Field with tlie curiously its pilot's hand not far from where Larry stoood.
eccentric Jleinze. Again his cheeks burned in anger at The boy ran over and picked up a small aluminum
the sneers and contemptuous laughter oi' the pilot with cylinder. With trembling hands lie opened it and took
the scarred face, who had just wanted to see if he out a piece of white paper. His hands shook with ex
could be easily frightened. citement as he rolled it out flat.
Larry remembered the deep-throated roar of the en On it was w ritten:
gine, the swoop of pinioned wings that bore them
through the blue sky, the rainbow arc of the propeller This is the first time I could fly since the craclc-up.
blades that forged their way through the cool, rushing This note is to ask if you want to he my assistant at
air. With sinking heart he realized that, he would never the field. I'll teach you to fly, with a salary, of course.
again feel those sensations that had lifted him from I iranl to repay you for haviny saved my life and I
the bog of his joyless, drudging life. think this is the hest way to do it. I know you want
to fly. Come over to the field this afternoon.
W . B iddle.
SILENTLY he did the chores demanded of him in
ever-increasing frequency by Mr. Bassett. The wo
That aflernoon,-after a stormy parting from (he Bas
man, too, kept up a continual nagging at the boy.
Larry tried to tell himself, night after night, as he setts, Larry presented himself before Major Biddle at
lay awake on his narrow bed in the uppermost Plank Field, suitcase in hand. The flyer, his right arm
room in the house, that these people had treated him bound close to his body and his face still showing a
very kindly, that there had been no call upon them to trace of pallor, shook him heartily by the hand.
support him thus far in his life. But he knew, also, “Larry,” he said, “you’re going to be a first-rate flyer.
that Bassett: needed an extra hand on the miserly farm, You’ve got. the spirit!”
and certainly found that Larry was more willing and Larry could only shake the Major’s hand more fer
cheaper than any hired man would have been. vently and hope that what Major Biddle said was true.
So, little by little, with a heart secretly aching with
all tlie misery of a lonely life, Larry toiled and tried to
forget the tanned faces of the flyers at Plank Field LARRY took to his new life as a duck takes to water.
He was, as the Major had assured him, born to the
that kept presenting themselves in his imagination. A controls, lie got the feel of a ship almost at once. The
week passed. One evening Larry went to retrieve his low drone of a pounding motor in his ears was sweet
new bicycle from the bushes where he had let it fall, music to his soul. It seemed as if something that had
and without explanation to his foster-parents, put it been missing from his life for eighteen motherless years
in the barn. It. was completely forgotten after that. had at last been given to him. lie had attained a hap
Then one morning, ten days after his birthday and its piness that had been denied him in his playless, hard
attendant adventures, he heard the roar of a plane over working youth.
head. With suddenly leaping heart, he turned his gaze During the day, he remained on the tarmac, avidly
aloft. From the direction of Plank Field a brand new gleaning information from the mechanics, and at night
monoplane was winging its swift way. Larry stood lie pored studiously over thick, dusty books on theoi'y
motionless, rapt in burning attention at the beautiful that lie had borrowed from the Major’s office.
7 '
8 J unior M echanics and M odel A i r p l a n e N ews
Then came tlie great (lay—the day on the office and cross the field. They
which lie was to embark on his first, solo joined the spectators gathered
flight. A broiling hot Texan sun flung its siz about, to watch the youngest pilot
zling rays clown upon the sandy expanse of on the field earn his wings. The
Plank Field. On the tarmac, her wings glitter Major waved encouragingly, and
ing in the golden sunlight, stood a trim, gray Larry gestured with his gloved
monoplane, her motor slowly turning over. A hand in response. Then he turned
pair of mechanics east expert eyes over the away, all thoughts concentrated on
fuselage, while another bent beneath the cowl the business before him.
ing and ran deft fingers over her engine. Larry Slowly he gave her the gun. The
stood beside them fastening his helmet under engine’s song rose suddenly from a
a sunburned chin. The grease monkey dull, monotonous drone to a cres
stopped tinkering with the engine and cendo roar of power, drowning all
turned to him. Everything was ready. else with its tremendous vibrations.
“She’s all right, son,” Larry felt a thrill come over him as
he said. “F it to make the ship trembled beneath him, as though she, too,
a coast-to-coast flight. were eager to be off—a captive bird longing for the
Good luck.” freedom of tlie heavens. Above him a clear, blue
Larry nodded his sky roofed the world. Larry eased her down
thanks over his shoul slowly, and removing his hand from the throttle
der and clambered in he gestured to the waiting mechanics.
the cockpit. As he bent “Contact!” he roared, his voice clashing with
over the controls he the pounding of the eager engine.
saw the Major and Brawny hands pulled the chocks away, and like
Heinze emerge from a race horse beating the barrier, the monoplane
shot ahead. For a moment, she taxied unevenly across
the field, gaining speed with each turn of her prop. The
motor purred evenly. Slowly he brought back the stick.
Up went her nose as she zoomed. The spinning wheels
of the landing gear left the ground. Again Larry gave
her the gun, and jerked the stick back all the way. Up
she went, for a lleeting moment almost perpendicular,
until it seemed as if she must fall into a whip stall.
But Larry knew his ship. He levelled her out slightly,
and then zoomed again. Through the still summer air
the monoplane roared her way, her motor singing a
happy song of freedom; her wings gliding through the
air like some gigantic eagle of the sky and her prop
blades invisible whirring arcs in the center of the sun.
HE slipstream flung a veritable gale behind him,

T and the rushing air blew its freshness full in his
face. It seemed as if the very elements were reflecting
his own happiness. The hand on the altimeter was at
1500 when he flattened her out, and swinging his ailerons
into play, banked prettily some two miles south of the
field. He knew that a score of eyes were watching him
from below, and he felt proud that he was acquitting
himself well. As he approached the field again from the
south side, he thrust the stick forward to dip in a salute
to his friends below.
Her nose went down, and the air howled through the
struts as gravity and the racing engine conspired to give
the plane a terrific speed. For a moment he killed the
motor, and, pulling back the stick, coasted gracefully a
scant three hundred feet above the rrpturned faces on
the tarmac. As he zoomed into the heavens once more
he noted that the field below was lined with planes.
Again he shot into the sky, over the trees at the far end
of the field. And in less than two minutes the gallant
little monoplane was a mile-and-a-half to the north. As
he banked and headed again for the hangars, he saw a
score of shimmering white birds coming toward him in
the distance. Flying in perfect military formation, on
came the entire fleet of Flank Field. At the apex of the
speeding wedge which bore down on him, he recognized
the gaily painted ship of the Major. For a fleeting
H is h a n d s moment he was puzzled; then, as he realized their pur
sh o o k wi t h
excitement as pose, his heart gave a great bound of pride. They were
he rolled out coming to escort him in!
the paper and Slowly, he brought the plane around to meet them.
read the mes He brought the stick back slightly, in order to fly over
sage written
on it them as they turned to go back (Continued on puyc 52)
In th e p h o to g rap h By
above is show n a
“ W ien” ty p e sailp lan e
in w hich R o b e rt K ro n - P E R C IV A L
feld in Ju ly , 1929, flew
93 m iles, reaching 7,080 W H IT E
feet above th e s t a r t
ing p o in t, a n d in w hich
he also flew 101 m iles and
recen tly . T h e shock-
cord is show n (right) MAT W H IT E
ju s t as it has left th e
nose o f th e seco n d ary
ty p e glider used b y
L ieut. B a rn a b y , U .S .N .
TV this issue the rolls sideways to the

-*· editor of M odel A ir A M a n u a l of M otorless Flig h t left or right on axis X.
plane N ews presents The movement on axis
the fifth instalment of the Ion (/-heralded series on Z is called the longitudinal movement of the glider;
diders and Glid ing. that on axis Y, the directional movement; and
The authors have obtained the material for these ar that on axis X, the lateral movement. These three
ticles from all the most authoritative and up-to-date movements are known, respectively, as pitch, yaw,
sources. and roll.
Pcrcival White is well known as a writer. Jte has The Elevators. The elevators usually consist of tivo
hrou(/lit out many hooks on technical and semi-technical flaps, often hinged to a stationary fin, called the sta
subjects, (such as “How to Fly an Airplane'’, published bilizer, which projects from either side of the rear
by Harper and Brothers), Mat White, the co-author, end of the fuselage. The elevators lie normally in a
has collaborated with Pcrcival White in the writiny of horizontal plane, but can be moved up or down on their
some of his previous works on aerial subjects. hinges. The two elevators act as a single unit, both mov
ing upward or downward at the
HE controls are tlie sur same time. (See Figure A.)
T faces which govern the

speed, direction of flight,
and in general, the atti
tude of the glider. There are
When they are raised, the
supporting surface is reduced
causing the tail of the glider to
go down, and the nose to go up
three sets of controls; the ele in consequence. (See Figure B.)
vators, the rudder, and the ail When they are lowered, the air
erons. Before you start to fly, forces the tail up and the nose
you must learn how to use down. (See Figure B.) Thus
these controls, since a glider the plane can be made to climb
without controls would be like or dive, or can be held level by
a kite without a string. the movement of the elevators.
The Axes of a Glider. A The Ailerojis. The ailerons
glider has three axes about are two horizontal flaps, hinged
which it turns. From Figure 1, usually to the trailing edge of
you can see that the ship turns each wing. Although they in
up or down on axis Z, to the A re m a rk ab le view o f a p rim a ry glider rare cases run the whole length
left or right on axis Y, and a t th e m o m en t o f release of the wing, they usually oc-
9
left. The pilot usually grasps it with his right hand.

II is connected by wires with the ailerons and the
elevators.
A forward movement of the stick depresses, and a
backward movement raises, the nose; while a movement
»f the stick to the left depresses the left and raises the
right wing, and vice versa. (See Figure B.)
The Rudder-Bar. The rudder is controlled from the
cockpit by the rudder-bar, just as the ailerons and ele
vators are* controlled by the stick. The rudder-bar
lies in a horizontal plane, and is pivoted at the center,
so that either end of it may be, pushed forward. The
pilot moves it with his feet, which rest on either end
of the bar.
The rudder-bar is connected by wires to the rudder
itself, so that when the left end
of the rudder-bar is pushed for
ward, the rudder, and conse
P h o to a b o v e show s quently the plane, turn left; and
h a n d le rs re a d y to
pull forw ard on th e vice versa. (These control move
shock cord. C e n te r ments are the exact opposite of
(left to rig h t) are those of the handle bars on a bi
show n C a p t. H . J . cycle: e. g. when you push on the
L o ftu s-P rice, e d ito r
of M o d e l A i r right end of the handle bar, it
pla n e N ew s, and turns the machine to the left.)
H a w l e y B o w l u s,
A m e r i c a n g l id e r
c h a m p , a t th e
S E N S IT IV IT Y of the Controls.
re ce n t N ew Y ork ^ The sensitivity of the controls
glider M eet at depends, not only on the size of
B ayside, L . I. A the control surfaces, but also on
side view o f th e
glider in p o sitio n the speed with which the glider is
for th e tak e -o ff is travelling. If the wind is high, or
d e p i c t e d b e lo w . if the ship is diving at a steep an
gle, the force of the air on the ail
erons, the elevators,
and rudder, will be
cupv from one-third to one- great, and the plane
lia li' of the total length of will respond readily
the wing. (See Figure A.) to control move
Figure A shows a wing ments.
tip aileron of a still differ T h i s responsive
ent type. Ailerons move up ness is in direct pro
and down on their hinges portion to the air
in the same way that the speed. When the
elevators do, except that speed is high the
they are connected in such pilot must handle
a way that whenever one the stick and the
goes up, the other goes rudder-bar gently,
down. When the aileron on and his movements
one wing moves upward, of them must be
the lift on that side is re slight. On the other
duced, and that wing drops. hand if the speed of
Meanwhile, the aileron on the glider is low, the
the other wing has been de sensitivity of the
pressed, the lift is in controls will be de
creased, and therefore that wing is raised. (See Fig. B.) creased, and wide and sweeping movements of the stick
The Rudder. The rudder is a vertical flap, usually and rudder-bar will become necessary. The controls are
hinged to a stationary fin at the end of the fuselage, then said to be “mushy.”
and movable from side to side. (See Figure A.) The Due to the relatively slow speed of a glider, all con
rudder and the elevators form the tail group, or empen trol surfaces must be much larger than in a powered
nage. The rudder acts in the same manner as the rud airplane.
der on a boat; when it is moved to the left, the force of Conclusion. The use of the controls is the basis of
the air pushes the tail to the right, and there is a re gliding.
sulting turn of the nose to the left. The action of the The movements of the stick and rudder-bar must
rudder is shown in Figure B. be reviewed in the mind, practiced on the ground,
and tried in the air by the student pilot, until they be
ΠΠΠΕ STICK. It is obvious that the pilot must have come so instinctive to him that he can guide the action
some convenient means of controlling the elevators, of the glider as involuntarily as he does his own arms
the rudder, and the ailerons from the cockpit. The stick and legs.
controls the elevators and the ailerons. The stick pro A take-off is the act of manoeuvering the glider
jects from the floor of the cockpit between the pilot’s from the ground into the air. In order to take off',
knees. It is universally mounted, so that it can be the glider must gain speed sufficient to give it lift and
pushed backward and forward and to\ the right and control. As the primary glider must, when in the air,
Gl i d i ng and Soaring 11
roly largely upon Col. C harles A.
tlie force of gravity L in d b erg h (left)
for propulsion; so, placing a wing
wlien on the ground, tip ailero n on a
B o w l u s sail-
the glider must gain p 1a n e . C o l .
speed from some ex L in d b e rg h (cir
terior source. A ball cle) i s shown
will not go through checking over
th e c o n tro ls b e
the air until set in fore a flight a t
motion by the throw L e b e c , C a lif .
er’s arm. T his is necessary
Choosing the Posi as som etim es the
control w ires be
tion for the Take- come crossed in
Off. The glider must th e rigging.
be dragged to the H aw ley Bowlus,
part of the field from th e p lan e ’s build
er, is standing a t
which tlie take-off is th e sh ip ’s nose
to be made. For this
purpose the glider is
usually set on small wheels. The fol
lowing things must be considered
when choosing the spot for tlie take
he f a m o u s
off: first, the direction of the wind; “ L one E a g le ” is
second, the steepness of the slope seen (below) a
down which you intend to glide; and m om ent before he
third, the freedom of the desired path w as c a ta p u lte d off
P o in t L om a on his
from obstacles. first flight, w hich
lasted th irty -o n e
ITlutely
is important, although not abso
necessary, that you take off
m in u te s an d won
him his first-
class glider license
directly into the wind. Tlie reason for — W m . V a n D u se n
this is that when you take off into the
wind, your wings obtain maximum
lifting power sooner. If you should
take off with the wind, you would be
apt to be blown almost immediately
to the ground. If you took off cross
wind, the ship would be in danger of
tilting sharply to one side, and your
take-off would be poor. If, however,
you take off directly into the wind,
your air speed will be greater than
your ground speed by an amount
equal to the velocity of the wind.
(See Figure la.)
For example, having taken off into
the wind, a glider may appear from
the ground not to be moving at all;
while actually it is holding its own
against the wind which rushes past
it. The distinction between air and
ground speed will become clearer if
you consider the analogy of the swim
mer who swims as hard as he can against the current, obstacles. Trees, fences, boulders, electric wires and
and yet cannot progress beyond the point on the bank other high obstructions are difficult to avoid after the
where he started; his water speed is considerable, al flight has commenced; consequently, you must plan your
though his ground speed is zero. course before taking off. Never assume that you will
In order that the take-off may be into the wind, glid go only a short distance—you may stay in the air longer
ing fields are usually chosen which face into the pre than you expect, and encounter obstacles which you had
vailing wind of the region, or which provide slopes in ignored when planning your course.
all directions. Even when you have become an able glider pilot,
Beginners should make their early tlights over level be sure to allow yourself a wide path; no matter how
ground or along gentle slopes. Steep slopes may cause exactly you are headed into the tvind, there is apt
such violent upward currents that they make smooth to be a certain amount of drift.
gliding impossible. The path of the beginner’s flight
should be so near the ground all the way that the land INSPECTION of the Glider. Before taking off, make
ing will be an easy one. (See Figure 2.) sure that the glider is ready for flight. The pilot, who
Moreover, if the hill is a long one, do not take off flew before you may have caused some injury to the ship
from the top until you have become proficient enough which he did not repair. Inspect all nuts, wires, turn
to make comparatively long flights; it is easier to land buckles, etc. Move the stick and rudder-bar to make
on the level ground at the foot of the hill than on the sure that they effect the proper control movements; the
slope. wires connecting the stick and rudder-bar with the con
It is imperative that your path of flight be free from trol surfaces sometimes get (Continued on page 18)
Δ Course in Airplane Designing
B y Mastering This V a lu a b le Course, the Model B u ild e r of
Today Lays the Cornerstone for His Career as the
A ero n a u tical Engineer and Designer of Tomorrow
By K en Sinclair
Figure /
N 'presenting this course, M odel A irplane N ews
■wishes to stress the fact that model building is Forces try to bend wing upward
more than a mere sport. I f the builder of model air Spars m u s t resist
planes learns the fundamental principles underlying
airplane flight and designing, he prepares himself for a
future career in the most profitable phase of aviation. !---- — -----3^.=^ ---------- ------- -------- =,
The policy of M odel A irplane N ews is not to en
courage or teach its readers to become pilots, but
rather to become aeronautical engineers, designers, ! ‘ 'T r m t T T T
salesmen, manufacturers, or equip themselves for any
other positions which require the training of the spe
cialist or executive. Study this course from month to Cantilever Wing
month, master it in every detail and you will gain a
fundamental knowledge of the how and why of air
1a , (No outside bracing)
WEIGHT
plane design which will be second to none.
T iie E ditor.
S we learned in each member, how can we

A the last article,
every condition
of flight imposes
tell just what each load
will be? That is rather
complicated, but let us
a different set of stresses begin with a simple case,
on the structure of the a wing spar, and see what
model airplane. Our task we can learn about the
now is to see just how stresses imposed on it.
fhese stresses affect the As we have learned in
internal members of that the earlier articles of this
structure, and to try to course, there is always a
formulate some method of lift, distributed over the
determining the sizes that wing or wings, that holds
will be needed for the va the ship in the air. Op
rious members. posing the lift, we have
To begin with, we must the weight, trying to
admit that it is rather bring the ship back down
beyond the average model to the ground again. The
builder to analyze all of 1lie stresses in a model air lift is distributed over the entire wing span, while the
plane. In addition to the inherent difficulty of the task, weight is mainly in the fuselage, and this leaves us
there is a lack of data on the subjects of strength and with the forces tending to bend the tips of the wings
weight of material in very small sizes, as used in the upward, as shown in Figure 1. Then the wing spar
model. must resist this bending tendency, or else the wing will
I have, however, gone through a complete stress break. As the wing spar resists, it is in bending stress;
analysis for a flying scale model, and later experimental which means that the forces applied to it tend to
work proved that the results were surprisingly accu bend it.
rate! However, that requires quite a bit of experience.
Most model builders, though unable to go through 1he S an example; hold a ruler on the edge of a table
complicated process of a complete stress analysis, can, A with one hand, leaving all but about two or three
however, get a general idea of the subject, and be able inches of the ruler extending beyond the edge. Now
to estimate the sizes of struts, longerons, etc., with rea push down the outer tip with the other hand. The ruler
sonable accuracy. will bend a little and, if the force applied is large
It is obviously useless to build a ship with every enough, or if the ruler is weak, it. will break, ti t really
member but one twice as large as needed, and with that is not necessary to break the ruler.)
one member too weak. The ship would be needlessly The ruler was in bending stress, just as is our wing
heavy, and that one weak member would probably cause spar when the ship is in the air. The only difference
it to collapse in the air! There are the two Extremes is that, in place of the single force at the outside end
to watch out for. First, the ship must not be too heavy; of the ruler, there is a continuous load, or distributed
second, it must not be too weak to withstand the loads load, on the wing spar. For our purposes the effects
of flight and landing. are the same in either case.
However, how can we tell just how strong a certain Now let us turn that ruler on edge and repeat the
part must be? Since there is usually a different load in experiment. Very hard to (Continued on page ϋ-1)
12
See Plans
O il
Pages 14 to 19
H O W T O B U I L D
A Solid Scale Model of a Curtiss ^Condor"

E x c e lle n t D a ta fo r M a k in g a R e p lic a
of th e U . S. A r m y Bom ber
HE Pacific Coast only a few months ago was Aving near the side motors. Be careful on this point.
T the scene of the most extensive mimic Avar eAer

staged by the Air Corps. Pursuit, attack, bom
bardment, and observation planes were recruited
from seA'en army flying fields. Commanding officers
Finish off the Aving like the top Aving and mark out
the ailerons.
TAIL SURFACES
agreed that maneuvers further shoAved the importance
of air forces in defense and attack. The engagements The rudders can be made moArable if the builder
also developed several practical points. One of them Avislies to do so. Trace out from plans, shape and stream
Avas that there should be two types of bombing planes; line as shoAvn in the draAving. There are tAvo elevators
a light one for day service and a heavier one that and two stabilizers. These also can be made movable
could carry bombs weighing up to 4,000 lbs. for night if desired. Tail surfaces are streamlined carefully,
attacks. The Curtiss Condor Avas decided the ideal as shown in the plans.
bomber for night attacks.
The plans draAvn here in the magazine are scaled to FUSELAGE
20". The Condor makes a peach of a model Avhen painted
the regular air corps colors. The fuselage is comparatively small and narroAV. It
In making this model the builder can use either Avhite is all square-sided and tapers down at the tail point.
pine or balsa, which can be bought at practically the The cockpit is carefully carved and cleaned out Avitli
same price. Be sure to·read OArer the directions before sandpaper. Place in the little seats as sliOAvn in the
going to Avork. draAving, a miniature control Avhich can be made from
You Avill notice in looking over the plans that the a stick of Avood Avitli a Avaslier or Avheel glued to the
plane itself is slim and has narroAV chord Avings and top, as sliOAvn in the drawing. The windshield and in
fine features. Let us start to make this model begin strument board are also made from the plans. The
ning Avitli the Avings. gunners’ cockpit should be drilled out before the fuse
lage is cut to shape. The scarf rings sIioavu around the
WINGS cockpits and on the side motors can be made of heaAry
Avire or can be bought in any fiA*e and ten cent store.
The top wing is made in one piece. After attaining You Avill find them just the right size. There are needed
the correct wing section, smooth Avitli sandpaper ami. six rings in all, tAvo around each cockpit. They are as
mark out the ailerons in dark pencil lines. The loAver sembled as sliOAvn in the draAvings.
Aving is made in four sections. The tAvo large halves
have the same airfoil section as on the top Aving. The SIDE MOTORS
center AA'ings, Avhich extend from the sides of the fuse
lage to the motors, taper doAvn from the higher point The tAvo m o to r s are made f r o m blocks o f Avood cut
near the fuselage to the same section of the loAver doAvn to the p r o p e r dimensions. (Continued on page 51)
13
7\
A Solid Scale M odel of a Curtiss “ Co n d o r ” 15
20
^16 J unior M echanics and M odel A i r p l a n e N ews
Λ Solid Scale M odel of a Curtiss “ Condor 17
j[j)f]nin(i3ii -— ^ — v— Gunners Cockpit

L //
t J /6
ΐΠΠΠΠΓΤΠΠΠΓΠΓ
1 r r n m r
ft T
/ III 1 If 1/» ■
12 Exhausts Λ \5
1
7
Bamboo Pegs p a in te d Black ,ι,ιι,ι i H
Q
1
M
Lg___ X -
\
F ro n t
painted silver
1.1—
*·'
RADIATOR
S o lid Balsa
-*i Shaped to f it upper side
S p in n e r o f lo w e r w in g
RIGHT ENGINE NACELLE
Tě W i r e
2 ^·" Long Jesq. Bamboo
B e n t here^ 2 S 'L o n g ,
TeSQ. Bam boo, p o in te d

a n d fo rc e d into balsa
DETAIL OF LANDING GEAR

*ψ\
B a ls a Sdcf/on J
X
No. 4 Pirn
\
6 Shape
of blade
-# 1
Patterns
S p in n e r f0r ce llu lo id
PROPELLER
to m ake windshield
Either two or three bladed
M ake 2 each
propellers m a y be used
\
18 J unior M echani cs and M odel A i r p l a n e N ews
/ τττττν
TAIL SURFACES
A Solid Scale M odel of a Curtiss “Condor” 19
o n s in k a b l e an d
N c a n ’t o v e r t u r n !
D ennis O w ens, m a c h in
is t’s m ate , (left) a n d
C a p t. J . O. A n d erso n o f
th e C e n tra l C o a st G u a rd
on board th e O ld
C h ica g o on its a rriv a l in
t h a t city a fte r a 2,000
m ile tr ip from th e C o ast
G u a rd sh ip y a rd a t C u r
tiss B ay, M d ., u n d e r
its ow n pow er (a t left)
—P & A
lbert m ic h -
A ■ E L S O N , (left)
n o ted ph y sicist, using
a m easu rin g a p p a ra
tu s to te s t his th e o ry
th a t lig h t tra v e ls
186,284 m iles a
second. A sim ple
telescope, m ade b y
D r. C. N . L ord, of
L ong B each, C alif.,
(rig h t) rev eals th e
p lan ets an d th is e arth
—P A
H U G E d iv in g bell
A (a t rig h t) for use in
salvage w ork w as d e m o n
s tra te d off th e shore o f
L o n g Isla n d b y H a rry
L . B ow doin o f N ew
Y ork, th e in v e n to r. T h e
bell w as low ered to a
d e p th o f 135 feet, w here
it successfully lo ca ted a
d iv er w ho h a d been
low ered a sh o rt d istan c e
a w ay from its diving p oint
—P&A
Here's a Novel Light to Make Yourself!
ere is a sired size of 4"
H new one!
An air
plane of
Full Construction Data
f o r a n I n e x p e n s i v e F i x t u re
s q u a re an d
221/2" long, as
shown under No.
1 in the plans.
Llie speedy mono Use a try-square to assure all dimensions
plane type, bn ill much on the order of a non being square and finish by sandpapering.
living, scale model, but so made that it will Hereafter, the various operations or steps
serve as a fascinating fixture to hold the in the construction will appear under the
center ceiling light in your room. number of each, as they are shown in the
Can you imagine it in place up there plans.
against the ceiling with the light shining No. 2. Designate the front and back of the
out of its two cabin windows, and Hooding block by marking the letters “F ” for front
the room with light through its glass bot and “IT’ for back in pencil on the two ends.
tom? It will prove a more attractive fixture On the end which you have chosen for the
than any you will ever find in a store, and back, measure 11/2" from opposite sides and
yet it is simple enough in design and con draw two lines across the face of the end.
struction for the novice to make. Take a plane and plane from the front to
Hanging loosely by the light cord, it will the back along a line drawn from one of the
sway in the lightest breeze, which gives the lines you just drew to the upper edge at the
appearance of actual flight. Have you ever front. This forms the top contour of the
seen one of our great cabin monoplanes soar fuselage. The parts to be removed are shown
ing through the night with its cabin lighted? in the plans in heavy shading lines.
It was a pretty sight, wasn't; it? Well, if Xow measure S" from the front end,
you get to work now and build this fixture, along the opposite face from that which
you will see that same sight every night. planed, and draw a line from
Something to think about, isn't it? edge to lie unused line which
The accompanying plans are so drawn as on thé back face. Plane along
to make the reading of them so simple that this line until you have
any boy who has never removed all the stock,
seen a set of blueprints as shown. Finish with
can read them as he sandpaper.
might a book. Each A slot is now cut in
step in the work is the rear end, as shown,
shown and is desig which is 1/8" wide and
2" long, extending com
nated by number. Let’s pletely through the
get busy and be the block from side to side.
first in our town to Locate the correct position for the side win
build and own an air dows and draw these on both sides of the
plane light fixture. fuselage block in pencil. These are 11/2"
FUSELAGE from the top and bottom of the block,
The fuselage is designated in the plans as “Part A”. measured at its' widest point, which is at the extreme
Turn to tliis, study it well, and make sure that you front end.
understand it before you start actual work. The fuse There are four windows in all, two on each side. As
lage is built in live operations. Original block is No. 1. this part of the fuselage is later cut out so that its
It is recommended that white pine be used for the walls are only 1/4" thick, these windows need not be
fuselage, though other woods can be used. The builder, cut deeper than 1/4". A common pen knife will be
in choosing his stock, should keep in mind the fact that found best for this work. Run the point of the knite
the finished fixture hangs on an electric light cord and, around the four sides of each window. Press it care
therefore, weight should be kept at a minimum. Do fully in the wood until the blade is about 1/4" deep or
not use balsa, as heat affects it. deeper. Still using <lie point of the knife, slowly pry
Obtain a piece of white pine, measuring 41/4" x the wood up until the holes are at least 1/4" deep.
41/4" X 23". Plane the four sides and ends to the de- Care must be exercised in tliis work, or the wood will
21
22 J unior M e c h a n i c s and M odel A i r p l a n e N e ws
split past tlie knife cuts. The sides of the fuselage are Now saw two cuts down the length of the block, so
now finished. that two 3/1" walls are left on each side. Make these
ΛΓο. 3. Measure 8" from the front end of the block, cuts exactly 8" long. Eemove the block from the vise,
and draw a line around all four sides of the block. and, using a chisel, remove the waste center block. To
With a plane, remove the wood shown in heavy shading insure against splitting the block, work the chisel from
in the plans. At the rear end of the block, two lines the center of the block at the 8" line toward the front
1 1/2" from each edge are drawn, as was done in opera end. When the rough cutting is finished, smooth with
tion No. 2. Plane from llie front line you have already sandpaper.
drawn to these two new lines.
LACE the block in the vise again in the same man
This will give the desired form to the tQp and bot
tom of the fuselage. ' If the work has been done P ner as before, and taking a brace and expansive bit,
bore a 1 1/2" diameter hole 3 1/2" in the exact center of
properly, the back end of the block will now be 1"
square,'as shown in the end view. Finish by sand the block. Do not attempt to judge the depth of this
papering smooth. hole without frequently removing the bit and dropping
No. /. The outline form of the fuselage is now finished. a rule in the hole. Eemove the block from the vise and
The top and bottom of the fuselage should now be so with a 1/2" auger bit, bore a hole from the top of the
marked in pencil. As they are both duplicates, the block in the 11/2" hole you have just finished. This
builder may choose which side the bottom will be, but second hole is located 111/4" from the front end of
must keep in mind that the bottom side should be the the block and in the center of the top. If done cor
best, as this shows the most when the fixture is hung rectly, the second hole will connect with the first one
in place. at the end of it.
All work from now on is done on the top and bottom No. 5. The block is now finished except for cutting the
sides of the fuselage. Take a fine tooth coping saw for small 1/2" steps, which hold the interior glass. The sides
the following work. Place the block in the vise, using of the front 8" of the block have been cut 3/4" thick.
several folds of paper to protect the block when in the They are now cut down to 1/4" thickness, leaving the
vise, in such a position as to leave the block free from original thickness of 3/4" at the bottom side of the
the vise 9" from the front end. Place it in so that the block, which extends up 1/2". A pen knife and small
front end is up. v c
is now finished, and should be carefully and

Side 6/ass' thoroughly sanded for smoothness.
FUSELAGE EOOF
This piece is shown in the plans under “P art B”.
While it is small, great care should be taken in
its finishing, as the lamp cord passes through it,
1 and its dimensions must be exact to insure
proper, hanging. Use 1" white pine, squaring
the board 4" wide and 12" long, as shown under
Ďoffom G/ass- No. 1 operation in the plans. Finish with
sandpapering.
No. 2. Measure’1" in from each end, and draw
a light pencil line across the face of the
board. Take a block plane and cut a bevel
edge, flattening off the edge from the under
edge of the board to the marked line. Do
this on both ends. (Continued on page 42)
D
i’M
--_Ί ■-■■■,,ιΐη
---- g—j
LIG H TIN G A S S E M B LY
H e r e ’ s a Novel L i ght to Make Y ou r s e l f i
23
ω
S/ot fo r
Original Block E le v a to r
Cutout for w in d o w s on both sides
^ Top l/iew
t
E nd
Top View l y n,
r ~ Diet,
PART A
The steps n e cessa ry in constructing

p a r ts o f th e fu s e la g e a re design a te d .
( C u t a w a y a li s h a d e d p a r t s ,)
m
m \ 't \ ‘ -J..
1m
+ -T -+
fift i/Sf
l" l"
lV
m
t l'L ^4
itf 4 ' i
m m m \—i—y ^-'-ui 1
60
PART C PART β
Trim a tJC a fte r a tta c h in g
in place on fu s e la g e
II End l/iew
v /e v v
L -T IC l
\ (N o te Stream line)
3==ί=ΓΔ
t -s '-l
Struts VA
4 R equired l/ ^ j i
PROPELLER
LANDING GEAR
He r e ’ s a N ovel L i g h t to M a k e Yourselfi 25
PART E
WING
' Τ ' H E D a rlin g to n Shops in E n g la n d , in p ro d u cin g th is g ian t lo com otive (above), h a v e in-
■*· tro d u c e d principles o f boiler c o n stru c tio n new to B ritish railw ay s. I t w as designed for
high speed traffic on th e e a s t c o ast ro u te. B ecause o f th e secrecy in its c o n stru c tio n , th e
new locom otive w as given th e so b riq u e t o f th e “ hu sh h u s h ” engine b y th e w orkm en
PS· A
T M ^ R M A N Y has com e
fo rth w ith so m e th in g
ra d ic a lly d iffe re n t in th e
c ro ss-c o u n try fire tru c k
(left), d esigned for use
in ru ra l d istric ts. I ts
in itial w o rk o u t in clu d ed
plu n g in g u p a n d dow n
hill, as well as o v e r ra il
ro ad tra c k s, a n d it is
claim ed t h a t it c an be
d riv e n o v er cree k s a n d
plow ed fields e q u ally well
In te r n a tio n a l
wtmmmmmsmm
Itu Nremdgoreadbernaotvcemoisnach
tra s t to th e
in es p ic
th e fam ous
“ O regon p o n y ” (rig h t),
th e first locom otive to
p e n e tr a te th e P a c ific
N o rth w e st in pioneer
d a y s. T h is old v e te ra n
has w itnessed m a n y h o s
tile a tta c k s m ad e b y th e
redskins as it carried
passengers a n d fre ig h t in
1862 a n d 1863 in its trip s
along th e s o u th e rn b a n k
o f th e C o lu m b ia R iv e r
In te r n a tio n a l
Λ S a f e a n d H a n d y T ool P a n e l
are kept sharp. Keeping them in proper condition is been placed side by side, with the finished faces np,
merely a question of keeping them in the proper place, apply generously along (lie edges to be joined. Hold
Many use regular tool boxes for this purpose, but them together with" a carpenter's clamp, or if one is
such boxes are often moved from place to place, at not available, tie the two boards together. If the latter
which time tools are sometimes thrown together. When method is used, make sure that the corresponding sides
tools are loose in this manner and allowed to shift and ends of the two boards are perfectly flush. Set
around, they often become dulled or nicked, especially aside to dry thoroughly.
in the case of line, higlily-teinpered steel tools. Another HIDES: The sides consist of two duplicate boards,
drawback to the box is that considerable time is lost each measuring 2" wide and 3' 10" long. Material is of
in hunting for desired tools, which have a way of 1" stock. These two boards may be cut from a piece
being on the bottom of the pile. 7' 8" long. Saw the board in half, making sure that all
Drawers also present the same difficulties, as the corners form right angles. Finish both of the boards
pulling out and pushing in of a drawer causes the tools by planing and sandpapering thoroughly. Set aside for
to shift, until they become an untidy and jumbled mass, future use.
The answer to all of these objections is the tool ENDS: The ends are made of 1" stock, also, and may
panel, where every tool is easily seen, can be removed lie cut from a single board measuring 2" wide and 4' 0"
or replaced in a second, and where each individual tool long. Saw the board into two equal lengths of 21".
has its own particular place. I t will be found to be Test with a trv-square in the usual manner. These must
(piite as handy to return the used tool to its particular also be finished on both sides by planing, if necessary,
spot, as to lay it on the bench where it may be lost or and sandpapering for desired smoothness. Set aside,
misplaced. ASSEMBLING: The panel is now ready to assemble.
This tool panel fits just above the work bench, is fas- If instructions have been followed, you should have
tcned to the wall, and has a swinging door, equipped the following boards:
with a hasjp and padlock, so that your tools may be For back: 2 pcs.—12"x4'-0" (glued together)
safely locked away when not in use. For sides: 2 pcs.—2" x 8' 10"
Follow these instructions carefully, and build your For ends: 2 pcs.—2"x24"
own tool panel. It is the best insurance you can obtain
on your tools. HECK each of these boards, making sure that they
BACK: The back of the panel is constructed of 1" are exactly to size, and have been finished as in
yellow pine. Two boards, measuring 12" wide and 4' 0" strueted above. Before proceeding, see that the back
long, are used. Obtain a board 12" x 8' 0" long, and saw boards are glued tightly together and that the glue is
it into two four-foot lengths. Use a try-square to check hard. If not, do not start the assembly until it has
corners, making sure that these form right angles, become so.
One face of each of these boards must be planed and Hot carpenter’s glue and 2" small-liead brads are used
sandpapered until perfectly smooth, as they form the for this work. First attach the two end pieces. Apply
panel when placed together. As the opposite face of the glue along the edge which is to be attached to the
each rests against the wall, it is not necessary to finishback board. Drive the nails through the back board
it smooth. from the back, until their points just show through the
Heat some carpenter’s glue, and when the boards have wood at the front.
27
These nails should be driven 1/2" from the end of When thoroughly dry, attach the four braces you have
the back board, and in a line with its edge. Drawing prepared, two to a door, with glue and the wood screws.
such a line in pencil will greatly help in this work. The screws should be 11/4" long.· The braces are
Be sure that the nails are driven perpendicularly, so placed on the inside of the doors. See that the screws
that when their points show through the board, tliey are screwed all the way in, so that their heads are
will also be in line. (Note drawing of this step.) flush with the face of the door, as shown in the draw
Now place the back board on the side edge of the ing. Set the doors aside to dry.
end board, see that the ends of both pieces and their FINISHING: Scrape away all excess glue from the
sides are perfectly ilush with each other ail'd drive the joints with a knife. Finish the panel by giving it a
nails home. Space the nails about 2" apart, as shown. thorough sanding, filling all holes with plastic wood,
and then applying two coats of stain. Do not stain the
TTACH the other end board in exactly the same back of the panel on which the tools hang, but leave in
A manner. We are now ready to attach the side
boards. Glue is applied to the long edge, which is
go against the back board, and also on the two end
its natural color until later.
to Now finish the two doors by attaching two 3" hinges
to each, as shown. The places on the doors and the
edges. Slip the side board between the two end boards, ends of tlie panel to which they are attached should be
and drive nails from the outer faces of both the end hollowed out to receive them, so that when in place
boards, through them and into the end edges of the they will tie perfectly flush with the top of the face.
side board. Next, drive nails from the back face of the Use 3/4" wood screws. Center the hinges, as shown,
back board, through it, and into the side board. These and place on the inside of the doors, so that when the
should also be spaced about 2" apart. doors are closed, the hinges will not show.
At this point in the assembling, take a try-square and A hasp is now attached to hold the/pndlock for lock
test all points, making sure that they form right-angles ing. Remove all excess glue with a Knife, fill all holes
with each other. When correct in this step, lay the with plastic wood, and finish with sandpaper. Test
entire structure aside until thoroughly dry. This can to see that the doors swing freely, and will yet close
be determined by testing the excess glue, which has tightly. Now finish by applying two coats of stain com
oozed from the joints. Ii it is hard enough to cut away pletely over both the doors, on the inside as well as the
with a knife, the structure has dried. outside.
DOOR: Obtain a piece of 1" stock measuring 12"
OOLS are kept in place on the panel by either bent
wide and S' 0" long. Saw this into four lengths, each
24" long, which will give you four pieces, each measur T nails or bent screws. If the former is used, proceed
in this manner:
ing 12" wide and 24" long. Plane all of these on both
sides, if rough, and finish smooth with sandpaper. Determine the exact location on the panel for each
There are two duplicate doors, each measuring 24" xof your tools, so planning the distribution as to allow
24". To obtain these, the four pieces you have just spare space on the panel for new tools. Lay the tool
in its chosen place against the panel, draw an outline
finished must be joined together in pairs. This is done
by small braces, which are made of 1/4" stock, each of it in pencil on the panel, and fill this in with black
measuring 1" wide and 21" long. , paint. Do this with each of your tools, so that, when
They must not extend across the entire width of thefinished, the location of each tool can 'easily be seen.
In this way, when the tool is removed for use, its
door, otherwise the doors would not close tightly as the
braces would hit against the edges of the sides of thelocation on the panel can easily be recognized when
panel. A space of 11/2" on each end is left clear to ready to replace the tool.
overcome this. Cut four pieces, each l/4 "x l"x 2 1 " Now lay the panel fiat on the floor, figure where best
long. Sandpaper to satin finish. to place the supports to keep the tools from falling and
Note in the drawing which shows these strips that in place, and drive 4" large-head nails into these places.
they are held in place with, wood screws, which are Drive the nails 1" into the back, but trjr to keep them
countersunk. Take a countersink and bore these out. from going through the back. Obtain a 1" pipe of
Four screws are used in each, and they should be short length, lay it against the nail, and then hammer
evenly spaced. the nail tightly around it, until it is parallel to the
Two of the door boards are now glued together, as back board. When finished, place the tool in its proper
was the back, and in the same manner, using hot car place and test to see that the nails hold perfectly. The
penter’s glue and a wood clamp or by tying the boards nails can be swung around to admit or release the tool,
together until dry. as desired.
Now glue the remaining two door boards together. Follow the above directions if using the bent screws,
which are so often used
for curtains, and can be
ft T *
Pencil line as
guide fo r nails
bought at any hard
ware store at small
Jr From end cost. The panel is now
4 " complete and is ready
for hanging.
Place the panel 2"
H l \2 S c re w s^ above the top of your
24" work bench, so that
ill
All
4
“ Tn
$ u
t
§ ! Nailsjust
;v4/4'.:
'·V/.'a·;
through boards ~ Nai/^
when the doors are
opened, they will clear
any low objects you may
have on your bench. The
tool panel is now com
pleted. Place your tools
Braces
in it, and don’t forget to
Glue lock it when finished
- l i v Edge Piews of Doors working.
A Safe and Handy T ool P a n e l
lllfsÉs80
π 1
i I
f ! >
W n g U ^ y
jo S tt
. j SK*J í r / A R E M A R K A B L Y fine
^ model of R-101 (above) is >53
included in the aircraft exhibition at
the Royal United Services Museum in
Whitehall, England, which has been
loaned by the Air Ministry. The
sun bath car is one of the novelties
at this year’s English motor show
(below). It has a glass sliding roof,
which is to ensure greater all around
visibility for the driver of the car
N e w s E v e n ts
AVEN’T you ever
How t o B u i l d in the project, but ten to
H w a n te d a re a l
houseboat of your
own? Well, here's A C a b in -B o a t
one when lie realizes what a
great health and happiness
builder this cabin-boat will
a convenient type of one be, not only for you but for
called the “cabin - boat.” all the family next summer,
Anchored on a lake or river, it will give you all the lie’ll willingly help you with the finances.
thrills of camping out, plus the excitement of being Decide on your dimensions. Much must depend on
captain and crew of your own ship. the money at your disposal, on the number of people
The cabin-boat is absolutely safe. It can’t be tipped you want to use the boat after it is built and on your
over and it can’t sink. It oilers the most wonderful age and size. I should suggest sixteen by eight as a
vacation any boy could have. Anchor it out in the good size for the boat, to be used by two boys. Keep
middle of the lake and you will find absolute freedom the proportions about the same if you change the size.
from mosquitoes and dies, for they do not cross water First build the boat, the so-called “barge” on which
very far. the superstructure rests. This is easily knocked to
If you tire of your anchorage Tind have no motorboat gether, as shown in plate A. F irst the side boards are
to tow you, just wait until the wind is right and take nailed to the .two-by-four blocks, then end-boards and
up your anchor. The sides of the cabin offer enough (he bracing two-by-fours. Last, put on the bottom
sail surface to carry you slowly but surely to the boards. These need only be one-incli lumber or less,
desired destination; and when you want to return, wait the sides, however, should be one inch and a quarter.
till the wind has changed.
Rest of all, there isn’t a thing in the making of this HE two short projections at the end corners are
cabin-boat that is beyond the skill of the average boy
who is handy with tools. Two or three boys working
together could finish it in a few weeks, and have it
T mooring posts and the corresponding long ones are
uprights, which will build into the cabin and make the
whole tiling steady as a rock. The mooring posts
ready for the vacation season. should project above the sideboards at least a foot
Everything in the building of this house-boat is and the uprights should project at least six feet.
simple. There are no fussy details to bother you. Old Re careful in picking your lumber for all parts which
lumber is just as good as new and it won’t cost you a will be beneath water level when the boat is done, so
tenth as much. The carpentry is of a rough and ready that there may be no flaws in the ^vood and no knot
type and even the making of the cabin will give you holes to ping. Make all joints reasonably tight and
few difficulties. smear the boards with white lead paint as you put
First, pick your location. I t is necessary to build them together. This will save a lot of caulking later.
this craft right by the side of the water, because of its Next comes the deck of the boat. Pick even boards,
weight. Remember what happened to Robinson Crusoe, free from splinters, and lay them carefully, starting at
who built a big canoe and then found it was half a mile (he tall uprights. F it the boards around the uprights
from shore, and he couldn’t carry it. Pick a good place by sawing out whatever is necessary.
right on the shore, preferably on a sloping beach. When you have laid the deck to your satisfaction,
Then get your lumber together, new or old. If you cut out a two-foot hatchway in one corner as shown
use new lumber you will have to interest your father in drawing C. Cleat the (Continued on page -10)
31
How το B ui ld a Ca b i n B oat 33
H0\» TO Κ011ΜΓ A
m m m g t on
ΊΙΙΕ C A m -d tfT
ί
E '
ho\w to pot
THE SIDING
AMP faOF BOA PD S ON
DETAIL SHOWING 1 l·
HATCH FOR» BAIUNG
FTC-
-----------------------------
G ~ FRONT vJIEAAJ OF
CABIN - B O A T - GH ovaHWG H ř T / t o D
HOW To LAUNCH
OF ANCHOR IN β FLAGPOLE, lanterns
T HE CABIN - B o a t an d anchor.
r P H E newest in vehicles are shown above. At left

-*■ is a gliding boat with pedals which was exhibited
in Paris this year. The well known astronomer,
Max Valier, drove his new rocket auto on the Avus
in Berlin (right). A valuable antique in the Bavarian
Library in Munich is the famous Codes Aureous
(bottom, left), the most beautiful evan
gelistic book in the world. It is studded j
V with valuable jewels. A new invention is Λ
^ the warm closet radiator (bottom, right) / A
which will keep both foods and
dishes warm at all times
N e w s E v e n ts
W hittling for Fun
W o o d + Knife = Several Natty Articles
By
VERY boy lias hacked further advanced until you
E away at a piece of
soft wood with liis
folding pen-knife and
T heodore O rchards learn to cut exactly to dimen
sions and no farther. When
one side is straight and
called it whittling. However, proven true with the try-
the real art of wood-working square, mark a small X on it
with a knife is something else with pencil so that you won’t
again. In New England, the cut into that side again.
old time Yankees used to The correct way to hold the
carve the most complicated knife is shown in the sketch
designs with a single blade. labelled 1. I t should be on a
Some of them made fall rigged slant, an oblique angle, with
ship models inside bottles, the wood and not at right
l e n g t h s of wooden - linked angles as is the invariable
chain, and other seemingly im way. of the amateur. This
possible things. gives the necessary paring
Any boy can learn to whit edge and is easier as well as
tle and you will be» amazed at better to do.
the things you can make when As soon as you find that
you have learned the funda you can cut where you want
mentals. Whittling can be to, without wasting wood, try
done at odd moments and in making this key rack for the
places where a complete set home. Most houses haven’t
of tools is out of the question. any place for keys, and they
Besides, it offers the best are always getting lost,
foundation of training for the strayed or stolen. Many times
young wood-worker. It is the key loses its usefulness be
useless to start in trying to cause it is not tagged and
make furniture and compli labelled.
cated lathe-turned objects be First; choose your wood.
fore you know how to use a Since the key rack is to be
blade . . . to whittle. used for the household, gum
First of all, provide yourself with a real knife. The wood might be chosen instead of pine, since it is'just
folding pen-knife, or jacknife, is of little use in whit as easy to work with and has a better grain.
tling because if has a tendency to close up on the Choose a piece free from knots or defects, with a ^
fingers. In addition, it is not likely to be made of a straight and attractive grain. It should be about eight
good steel which will hold the necessary edge, and you inches long and an inch and a half square when cut out
don’t want to be sharpening the knife every few min of the rough, with either saw or hatchet. Now whittle it
utes. Get a knife of the type known as “Swedish carefully down to the outside dimensions shown in
whittling,” with a curved wooden handle and a rigid drawing number 2, which are seven inches long by one
blade of good Swedish steel, from which the best ship- inch square.
bottoms are made today.
Make sure that your knife has a good edge and keep LATE 3 shows the three steps in the cutting of the
it so. Grinding will not be necessary often but learn
to use an oil stone, with a circular motion and the P key rack. A shows the block ready for cutting the
details. B shows the shaping lines of the end and the
knife blade fiat against the stone. This keeps it in cutting of them. C shows how all the notches are laid
fine shape and cuts the work in two. out, marked with a 411 pencil and then carefully cut.
White pine is the best wood to work with because it The ends are bevelled by whittling to the lines and then
is usually straight in grain and free from sappiness, cutting back to the middle of each edge, as shown in C.
as well as soft and easily cut. First practice until you Now the knife work is finished, as soon as all rough
can cut a piece of pine into an exact oblong six inches spots and details are taken care of. Place three brass
by one inch square. There is no use in trying anything screwdiooks in the exact centers of the large blank
35
3C J unior M echanics and M odel a rplane N ews
spaces and two small picture you wish to

screw-eyes to match in frame, and in any case,
the upper edge, so that it should not be smaller
the key rack can he hung than three by four
from the wall. Plate -1 inches, nor larger than
shows two views of the ten by fifteen. The
finished key rack. thickness should be half
For practice in whit inch, or even quarter-
tling curves, try making inch if the smaller size
a dozen or so of the key dimensions are used. For
tabs shown in Plate 5. the sake of convenience,
Get as thin stock for all dimensions are here
these as you can, for it given as for the larger
will save cutting. lie- size of six inches by
member in cutting curves with the knife that you must eight; a good size for tin; small picture.
keep your thumb out of the way, as is shown in the True up the piece of wood with your knife, testing
drawing. Jf you hold tlie wood in this manner, you with the try-square and the rule, until you have it
cannot cut yourself. exactly squared in the chosen dimensions. Xow with
Remember that a true craftsman cuts toward him the 411 pencil and the square or rule, mark a line around
self as much as possible, in the Indian fashion, as the surface a quarter of an inch from the edge. Do
it allows greater accuracy and less chance of spoil the same on the ends and sides.
ing the thing you are making by This outlines your bevel, which
a wild stroke. must be cut away with great care.
Make the little holes in the Work slowly, starting at one up
tabs with a brad-awl and wire per corner and going right
them to tin; keys with small around.
pieces of copper wire. Print the When the edge is finished, you
name of the key on its tab with are ready to mark out the oval
black Indian ink, which is water in the center, which must be cut
proof. If the key tabs get lots of away. The simplest and best
use and tend to become dirty, way of marking out the oval,
you can sandpaper them oil’, re avoiding all drawing of angles
letter the name, and then apply and circles, is to use the carpen
one light coat of varnish, which ter’s “string rule”.
will protect them. First draw a line vertically
A whittling project of some down the center of the piece of
what greater difficulty is the fish wood, lengthwise. Then measure
ing-line winder shown in Plate (i. and draw a line horizontally, also
Make this half an inch thick, one inch wide in the in the middle. All this must be done accurately.
middle and two inches at the ends, and six inches in Xow measure up one inch from the cross-line on the
length. Practice will enable you to make true curves vertical line and make a dot. Measure down the same
on the ends, following tin* guiding lines drawn with a distance and make another dot. Drive a heavy pin or
compass before you start. a light finishing nail at each of these dots.
It is permissible to use sand-paper to finish the Xow take a piece of ordinary string about nine inches
curved surfaces, although (lie skillful whittler avoids long and lie its ends together. Lay this over the two
it on all Hat or angular work, since it covers up mis pins. Place the point of a pencil inside this string
takes. Also when circle, and pressing
once it has worked outward and around,
its fine grit in the you will transcribe
wood, no tool may a perfect ellipse,
be used there again much more quickly
without being dulled. a nd successfully
When you have t h a n instruments
whittled the above could do it. If the
pieces successfully, ellipse is too large
you are ready to un or small, shorten or
dertake something lengthen the string
several steps ad and draw another.
vanced in the art of Xow take out the
knife-work. A pic pins and cut out the
ture frame with bev inside of the oval.
elled edges and an If you have a cop
oval or elliptical ing-saw, use it by
opening will make a passing it through a
charming Christinas brad-awl hole bored
present for someone, in the oval. Then
or serve as a decora cut around not too
tion for your own near the line which
room. marks the desired
Get a piece of edge, finishing with
maple wood, which the knife. If you
has a most attrac haven't •such a saw,
tive grain. Its size just drill a (Con
will depend on the 3 - THREE STEPS IN CUTTING OUT THE KET RACK tinued on pcuje 53)
Handicraft Hints for the Junior Mechanic
S e v e ra l U seful A r t i c l e s to Make
By C h u c k S t e w a r t
middle toward llie other end with
the other end of the magnet.
The needle will show a decided »lip
now. Kegrind it until there is per
fect balance again. Now polish the
needle carefully, all but a small tri
angle on the north tip, which will
serve to»distinguish it.
You now have a compass which
will compare favorably with any.
Don’t be confused by the fact that
the magnetic north and the true
north are several points apart, and
also remember that the north star
is not exactly in the true scientific
north.
Hunters have carried a straight
H ere' s t iie O nly H ome-Made brass pin instead of the curved one;
C ompass ! needle and pin wrapped in waxed
paper and carried in the pocket for
AKE an ordinary safety razor safety. There may always come a iiX S I L
T blade and grind it down on an cloudy day when the compass means
emery wheel or hand stone until ahome instead of wandering lost and
diamond shaped piece similar to the alone. j i im t y w Ě
black part of diagram one is the
result. Keep the blade wet while
grinding so that its temper wall re Now cut around the pattern with
main. After the shape is formed, shears, working extra carefully. A
take the temper out of the middle pocket knife and an ordinary three-
with gas or alcohol flame and bend cornered file are handy for smooth
by pounding with a nail, as shown ing oil' rough edges. Leave little tabs,
in the second illustration, using a or ears, at the top and bottom. When
soft wood block as the base. the design is finished, these are in
Mount this needle on a brass pin. serted in slots cut in the door of the
Almost any club or campaign button car and bent over. If the panel has
is built on one, and it can be easily a wood backing, drill holes in the
removed. The brass must have a monogram and fasten it up with
very tine point. A G oldfish B ridge small nails. File their heads off
Put the needle on the pin, with the afterward and polish the monogram
point in the groove you have pounded. HIS looks like parlor magic but until it sparkles.
Grind down the needle until there is
perfect balance. Magnetize by rub T it works. Take any two bowls of
goldfish and make sure that the levels
bing the needle from the middle to of the water are the same in each.
ward one end with one pole of a Now bend a large-sized glass tube to
horseshoe magnet, and then from the the shape of a wide, long U, using
an alcohol flame or a Bunsen burner.
Make sure the tube is big enough
for your fish.
Fill the tube with water and
quickly insert its ends in Ihe water
of the goldfish bowls. I t will remain
filled and you will soon sec the fish
exploring their new promenade.
Give Your Car Class
MONOGBAM lends smartness
A to any car, whether it be a
limousine or a flivver. Aluminum
,lasts the longest, is the easiest to
work with, and polishes the best.
Cut out the two or three letters
you want from a magazine or news A W e a t iie k - P l a n e
paper in the style you think best
suited, and paste them to the piece EBE’S a new stunt for you
of aluminum you intend to use. I t is
a good plan to leave a bar of alu H model-builders; one that will
catch the public eye and let the world
minum connecting or binding in the know you are sky-minded. Take one
letters to hold the design together as of your old scale-model planes, mak
shown in the drawing. Getting a de ing sure that it is well weather
sign is the hardest part of the job proofed. Balance \ it carefully by a
but a little practice will make you cord from each wing-tip until it
able to tell what balances and what hangs with the tail just a little be
does not. low the fuselage. ( Cant’d on page 55)
37
38 J unior Mechanics and M odel A i r p l a n e N ews
Special Course in Air Navigation

(Continued from page δ)
vente d b y a you your drift, or the angle your

spring which is actual track over the ground makes
attached to the with the course you are steering as
other side hold shown by your compass. From this
ing it in a nor can be found the windspeed and di
mal position. rection. As soon as any instrument
When you rise is evolved which will tell you your
Ihe air-pressuredrift, or your windspeed and direc
decreases a n d tion, without any reference to the
the force of the earth, sea or sky, practically all
spring acts on your problems of navigation will
the c h a m b e r.
have been solved for you. You will
When you re see later on how essential it is to
turn to land, theknow the windspeed and direction
air-pressure has before an exact compass course can
The easiest way to avoid having to increased again and acts against the be calculated.
make these calculations in the air is force of the spring on the \acuum There are various types of drift
to prepare a little scale of your own, chamber. These movements are com indicators in use, but Figure δ shows
showing what your true speed will municated to a dial. On the face of a well known type made by the Pio
be at various heights, based on your the dial is a little screw which may neer Instrument Company, which is
normal cruising speed. be turned to set the dial at zero be accurate and easjTto use. It is essen
Altimeter. The altime tial that the instrument be
ter is an instrument for so mounted that when the
recording your height pointer indicates zero, the
and is really the least ex drift wire is parallel with
act instrument of any the fore and aft line of the
used in the air today. If plane. If this is not so, all
you know the principles of the angles obtained will be
Hie o r d i n a r y aneroid wrong.
barometer, you have a ť You fly on a constant
once the principles of the course and, l o o k i n g
aneroid altimeter — the through the eyepiece on to
two are intimately con the drift-wire, you observe
nected. With the barome objects on the ground pass
ter, changes in air pres ing along underneath. By
sure express changes in turning a small handle you
weather; with the alti turn the frame holding the
meter, changes in air pres drift-wire until the objects
sure express changes in on the ground appear to be
height. passing right along the
wire. A glance at the indi
F you left your alti cator on the side of the in
I meter at night set at
zero and it was reading
lower in the morning,
strument will show you
your drift angle. From
your drift angle, in con
other things being equal, junction with your airspeed
tine weather would be in as shown on the indicator,
dicated; if it was reading can be worked out your
higher, bad weather. This windspeed from the table
is, of course, not the func given on page 40.
tion of the aneroid alti At certain of these wind-
meter, but it can be seen speeds you would obviously
how approximate it is, for if you fore you start, after which all the not be in the air at all, but the table
were Hying along at a constant heights shown will be relative to has been made as comprehensive as
height and the weather was changing your starting place. possible. On bumpy days when the
considerably, your altimeter would This must be remembered in flying ship is on an unsteady keel, it is
change its reading, although your over hilly country and maps must very difficult, if not impossible, to
height would be the same. Also it be consulted to find out the heights get accurate results with a drift
will only show you your height above above sea-level of the regions over indicator.
the place from which you have which you are flying—your alti Having found your angle of drift
started and not necessarily above meter will not tell you this. Sub (Continued on page 40)
sea-level. However, it is sufficient ject to these limi
"for most normal purposes, though it tations an alti
is essential you should know its limi meter will gener Pointer
Drum,
Balance W eight
tations. ally give accurate
The altimeter consists of a vacuum service for long
chamber and a delicate mechanism periods. If any
which communicates the movement f a u l t s develop,
of the vacuum chamber to a gradu t h e instrument BellCrank
ated dial. From Figure 3 you will must be returned
see that the vacuum chamber is a lit to the makers. Vacuum- Chamber
tle, thin corrugated chamber, one side D r i f t Indica Spring opposing atmospheric
pressure and tending to dis Compressed by atmospheric
of which is fastened to the base of the tor. This is one tend the vacuum chamber pressure
instrument. Normally the air-pres of the most im
sure from outside (since there is portant i n s t r u F ig . 3
none inside to counteract it) would ments in air navi ANEROID A L T I M E T E R
contract the chamber; but this is pre- gation and tells
November, 1930 J unior M echanics and M odel A i r p l a n e N ews 39
Time after time others have tried it, then

They all began saying "IT C A N 'T BE D O N E "
— but they reckoned without Cleveland
engineers, for
HERE IT IS!
The Travel Air Mystery Ship! The most talked about plane in America today.
The ship that ran away with the show at the National Air Races in Cleveland.
The plane that crossed America in half a day. Every boy has been thrilled with
its amazing performance, its swift, spirited lines. A nd now here it is in K it
form for you to build! We knew you wanted it—and though it’s just about the
hardest plane of all to model, so much so that no other concern has attempted
to produce it commercially—we’ve literally turned heaven and earth in our de
termination to give it to you. And with just a trivial modification (which might
even be missed by an expert) it’s an exact scale model of Capt. Hawk’s record-
making transcontinental plane. You'll be wild about ill
T h e S e n sa tio n a l
Y o u N e v e r S a iv So M a n y F E A T U R E S C le v e la n d 'D e sig n e d
1. K it
In O n e M o d e l B efo re
c o n tain s an e x tra large d raw in g — 12. C olored like its p ro to ty p e, a brillian t
TRAVEL AIR
e v ery th in g full size— an d cram m ed w ith
p h o to g rap h s an d su p er-d etailed in stru c
tions.
13.
red b eau tifully scalloped batlik e in
black, w ith th e use of p a tte rn s c u t from
o u r p a tte rn s h e e t.'
A d ju stab le control surfaces and re
MYSTERY SHIP
2. All balsa co n stru ctio n . The m ost-w anted model plane in America—and
m ovable p a rts. F light a d ju stm e n t
3. All possible d etails reproduced. sim ple. here’s the still bigger surprise: I t ’s even easier to
4. Perfectly tu rn e d a n d finished balsa 14. V ery well stressed. I t will even· power construct than our fa m o u s Great Lakes Sport
N . A. C. A. Cowl a n d Ring. dive in to th e ground from a 50-foot T rainer M odel. Like the big plane itself, it
5. T h e F illet (betw een w in g s|an d fuselage) a ltitu d e w ith o u t crashing (F latten in g flies a t a very high ra te of speed, climbs with
and com plicated cu rv ed fuselage, easy o u t often comes in to play due to breath-taking ra p id ity —and has astonished
to build. "g ro u n d effect,” in which case th e
6. V ery efficient w ing section em ployed. m odel m akes a beautiful 3-poinl experienced model engineers with its distance.
7. Only tw o im p o rta n t w ire p a rts to m ake. lan d in g .) D on’t miss getting it— b u t you m ust hurry.
8. N ew C leveland-D esigned nose bearing.
15. W ings do not slide for balancing. It We have m any, m any advanced orders on hand,
alw ays looks like th e real M y ste ry Ship. and can only guarantee delivery in the order of
9. I t is a flying or ex h ib itio n model 16. W heel shoes easily made.
(change only propellers). 17. Perfectly proportioned to ·):(" scale,
acceptance. So to avoid long delays and dis
10. Sim plified c o n stru ctio n th ro u g h o u t th e sta n d a rd set by C leveland M odel app o in tm en t S E N D YOUR O R D E R R IG H T
(sim ple even for beginners). Engineers. AWAY. The complete kit w ith its super-
11. New sim ple m ethod of C leveland- 18. M an y o th e r advanced C leveland- detailed drawings, easy-to-follow instructions
D esigned propeller m aking (indestruc- D esigned fe a tu re s w hich you will dis and all m aterials costs only S6.60, postfree to
tab le propellers). cover yourself when you get your kit. any p a rt of the world. You can also buy it on
the Cleveland Dollar-and-D im e-a-M onth Plan.
'‘C le v e la n d B lu e D ia m o n d ’1 Sym bol of H on est Q u a lity , R e a s o n a b le P rice and Speedy 6 -H o u r S ervice
T H E Y E A R 'S H IT IN M O D E L S B O Y S. M E E T
C A P T . R IC H A R D S O N
H ere are th ree of th e New A ir Line of 12 Cleve
land-D esigned Free Lance K its (p a te n ts appld. O fficially lie's know n as
C a p ta in H o ld en C . R ic h
for). O nlv S I . 25 a ' kit. o r th e e n tire 12 for a rd so n . C h ief E n g in e e r of
$ 1 3 .2 5 (a saving of $ 1 .7 5 ). th e C le v e la n d M o d el a n d
S u p p ly C o. F o rm e rly he
P rim ary T rn in in g Glider and Advanced Sourer w as C hief of D esig n S ec
K it N o . F L - tio n , B u re a u of A e ro n a u
101. Spans tics, U n ite d S ta te s N a v y .
1 3 J* " a n d 18-
y L e n g th s
New C L E V E L A N D A M P H IB IO N 7 " a n d 1 '/ , " · Send for New Notebook and Catalog
Modeled after Sikorsky. Known as EL-301 C o lo red : R e d . T he new F a ll-W in te r N otebook and C atalog
Kit. E verything draw n full size, with White and gives com plete d etails on all C leveland-D esigned
complete detailed instructions. He sure Blue. Air Line M odels a n d 15c O utline D raw ings.
If you h a v e n ’t a lre a d y got one (those who have
to get it. E asy as the T rainer to build. will regularly receive new fillers to keep theirs
Colors—Yellow and Blue. K it complete, Boeing u p -to -d ate) send 25c N O W while th e supply
$3.30 postfree. F ig h ter still lasts. It will b rin g you m any h ap p y hours,
M odel FL-104. and beats a n y th in g else for passing long w inter
Span 11 " evenings. R ush yo u r 25c T O D A Y (stam ps not
New G R E A T len g th 7 % " accepted).
S ilv er a n d Blue.
LA KES S P O R T 7.11test Fighter
in U . S . A ir
Forces.
T R A IN E R I CLEVELAND M O D EL & SU PPLY CO.
• 1866N W e s t 5 7 th S t., C le v e la n d , O h io
The great popularity of this epoch- * G entlem en. E nclosed i s . . . . f o r th e following:
Lockheed
making kit has enabled us to reduce our Sirius
proposed advanced price from $6.60 to I □ F a ll-W in te r N otebook and C atalog.
M o d el FL -111.
$5.50 postfree. T his as well as the K it Span 16 tg " : I (L ist rest of your o rd e r on se p a ra te sheet and
above m ay be purchased on the Dollar - le n g th 10 Η " · I pin to th is).
O ra n g e and
and-Dim e-a-M onth plan. T his is the B lack . L in d
plane th at one Cleveland man m ade a bergh's F a m o u s
S h ip . ^ N am e
record flight of 3,608 ft. R.O.G. with.
I
C L E V E L A N D M O D E L & S U P P L Y C O ., I A d d re ss.........................................
Model Engineers, 1866N W est 57th St., Cleveland, Ohio, U.S.A. II \

M odel E x p e rien c e ............yrs. A g e .. . .yrs.
{Continued from page 38)

it may be advisable to also find the
Angle A ir s p e e d
direction from which the wind is
of Miles per Hour blowing. This ensures greater ac
Drift curacy in working out a course. To
60 70 80 90 100 110 120 do this you have the drift indicator
5° 5 6 7 8 9 10 11
at zero and turn the ship round into
7° 7 9 10 12 13 15 16 the wind until looking through the
9° 10 11 13 15 17 19 20 eyepiece on to the drift-wire, the
11° 12 13 16 18 20 22 23 objects below seem to be passing
13° 14 16 18 21 24 26 28 directly along the wire. Xow glance
15°
17°
16 19 21 24 27 29 30 quickly at your compass and this
19 22
19° 21 25
24 27
31
31 34 37 will tell you the bearing from which
28 35 39 - 42
21° 23 27 31 35 39 43 47
the wind is blowing.
23° 26 30 34 38 43 47 52
What you do with your windspeed,
25° 28 33 38 42 47 52 57 drift-angles and wind directions will
To the nearest mile per hour be dealt with in a later article. At
tlie moment we are only concerned
with the instruments.
How to Build a Cabin-Boat

(Continued from page 31)
boards, cut a hole for a finger-grip and use, instead of buying them new put on when the roof is ready for it.
in lifting and fasten back in place or trying to make them yourself. However, if you want to cut down
with two good strong hinges. Brass The door could be got the same way. on expenses even more, you can do
will be best and look best, too. This Be sure and leave a six or eight what one boy did successfully . . .
hatch will oiler you a way of getting inch lintel, or bottom crosspiece, gather old newspapers, fold them in
in the hold to make repairs and to in the doorway. This is necessary triangles and lay them like shingles
bail out any water that may leak in on all ships, so that when water on the roof, and on the sides, too, if
before the seams have swelled up sloshes across the deck it cannot you want to make the building wind
tight. It also oilers a good place to trickle in the door and wet the in and weather proof. Shingles made
hide things or to store foodstuffs, terior. And even on this cabin-boat, of newspaper will last for several
etc'., that have to be kept cool and there may be rainy and windy days years; they insulate against heat or
out of the sunlight. when the waves break over her bows. cold and they give an unusual effect.
In the illustration, the frame of Best of all, they don’t cost anything
ANY cabin-boats of this type the roof has been left out to show but some trouble in gathering.
have (living-boards built on more of the uprights. One or two When you have finished the roof,
them, and if you plan to do much pieces of two-by-four should extend you are ready to launch the cabin-
swimming one will add a good deal on the slant between the top of the boat. Get a bunch of the fellows to
to the sport. Choose a board that is door and the rear, to support the gether and borrow a couple of auto
of hardwood, stout and strong. I t roof boards. jacks from your dad’s car. You will
should be about eight feet long. When the frame is up to your need three or four long poles, or if
Mount it securely under a heavy oak satisfaction and securely nailed with these aren’t to be had, round blocks
block as shown in the picture, rest spikes, it is time to put on the siding of wood will do.
ing its middle teeter-totter style on and roof. Start at one corner and Jack up the cabin-boat until you
another block. About six feet of the go right around the building. Cut can get one of the blocks or rollers
board should project over the. water. out space for the windows. under, and the same with the other
Tape or bind the end securely so If you have made the cabin-boat end. Work in this manner until you
that your feet will not slip when you in the dimensions suggested, sixteen have the entire boat up in the air,
take the liop-oif. This board may be by eight, then the cabin should be resting on the rollers. Now put your
removed easily by slipping it out about eight by six and needs but one shoulders against it and push. The
from under the oak block and stowed window. If the arrangement of the boat will slide easily down toward
away in the hold until needed again. interior permits, however, a second the water. Go slowly, so that you’ll
If it is left in place, you are apt to window will be a great help in get have time to insert the rollers in
crack it by ramming a pier or the ting air and light. It is best to front of the boat as it rolls off them
shore. make the place for it in the frame, behind.
The next step is the superstruc and then leave the boards in place
ture; the cabin itself. The boat until you decide whether or not you F you wish, have somebody break
may, of course, be launched now, but need it.
you will find it easier to get around The roof boards may be put on of
it and do the work of carpentry if any scraps of lumber, since they will
I a bottle of pop on the bows as
the boat slides in the water, christen
ing her whatever name you have
it is secure on the sand until the have to be shingled or covered with chosen. Bemember to have a rope
cabin is in shape. The weight of tar roofing if you want the building fast to one mooring post when the
the cabin will not add much to the to be waterproof. I should suggest, boat slides in the water, or else
difficulty of launching. by the way, that the roof slant on a you’ll see it drift out and have λ
Drawing D shows how to put up good angle, to secure swift drainage time getting her back.
the frame of the cabin, using the of rain water. Have the front of Also one boy should jump on
two uprights as rear corners. Two- the cabin seven feet high, which will board as she floats, for it is con
bv-fours are best for this frame, and make a foot drop. sidered bad luck among mariners to
pine will do better than hard wood. Next decide wliat you are going to let. a vessel go down the ways with
One-by-twos may also be used if do about the roof. Shingles are good out a crew on her. You'll have a lot
light, construction is wanted, but but expensive. Enough to cover this of fun planning the details of the
they will not be as secure and strong. building would cost about twelve launching and christening according
Frame the windows and the door as dollars and if you can get part of a to maritime tradition.
shown. It is a good idea to hunt roll of tar paper, you will find it The next step is fitting up the
around until you find some old win just as good and much cheaper, be cabin. You ought to have a couple
dows which you can pick up cheaply sides taking less skill and time to of built-in berths, as they are easier
November, 1330 JUNIOR MECHANICS AND MODEL A I RPL AN E NEWS 41
to sleep in than cots and take up
less room if they are double-decked.
Make them as shown in drawing F,
flush against one corner. They
should be six feet‘long and two feet
wide, supported a't the corners by
two-by-twos of hardwood.
Your imagination will suggest
many things to do to the inside of
the cabin and it can be a mighty
comfortable little place. Get old fur
niture that your mother doesn’t
want to give house-room any more,
build tables and benches that lit
against the wall and put down old Earn
carpets on the floor. The bunks can
be Jitted up with, mattresses or with
home-made ticks full of straw. An
f Money*
oil stove can go at oue end of the
room, under a window, for cooking.
It will add to the appearance of
the boat if you give it a couple of
coats of white,paint outside. White
WinPrizes
paint is cheaper than any other and
gives a true nautical effect. Remem
ber to paint the bottom, below the
door, black so that you will see it
and not stumble every time you go
through the door.
IXI) out what the laws are re
F garding house-boats in your state.
It may be necessary to display lights
at night. At any rate you will want
“ΠΤΉΥ sit and dream about the bicycle, radio,
or athletic equipment that you would like
to li^ve? Here's your big opportunity to earn
a couple of old lanterns, ship’s lan
terns if you can get them, to hang any prize you want—without a cent of cost to
for port and starboard lights. Hang you. Oh, boy! You’ll feel like a king when
them from iron or wooden brackets, you have your own spending money jingling
so that they project cornerwise and in your pockets, a stack of dollars in the
are visible fore and aft, as well as bank, and your arms full of the dandiest prizes
from the sides. you ever saw!
An anchor is absolutely necessary,
for sometimes you will want to get
out away from the shore and stay
in deep water. Get rope enough to
No Experience
reach tlie deepest part of the body of
water in which your boat floats, and Needed
tar it thoroughly to prevent its rot Just like hundreds of other boys, you can join
ting. Take a canvas sack, not a the Crowell Club of Junior Salesmen. In a
gunny sack, and till it with old iron
or sand. Wire the rope to the sack small part of your spare time you can deliver
and fasten the other end to one of The American Magazine, Woman’s Home
the mooring posts. This will be Companion, and Collier’s The National
anchor enough to hold the cabin- Weekly, to regular customers who live in
boat in a gale. your own neighborhood. You need no ex
For a mast, take an ordinary perience to start. We tell you how you can
good stout fishpole of the cane begin at once.
variety, mount it in a block and set
through a hole in the projecting part
of the roof, as shown. There should W in M any Big Prizes
be a tiny pulley at the top of the E a r n Y o u r O w n S p e n d in g M o n ey
mast for the flag-rope to run
through, aiuUsome means of fasten Right away—this very minute—send your
ing the rope at the block. name and address on the coupon below. Don’t
A real nautical effect, as well as let some other fellow in your neighborhood
pleasant entertainment for the eve beat you to it. Get the money and prizes
nings can be attained by hanging
a ship’s type aerial from the tip of that you have been wishing for.
the mast to the corner of the cabin,
connecting with a radio inside.
You will need a small boat to use
as a tender for the times when your M r. J i m T h a y e r , D e p t . ,174 Í
house-boat is out in the middle of T h e C ro w e ll P u b l i s h i n g C o ., I
S p r in g f ie ld , O h io .
the lake and can’t be reached by Pear Jim : I want to earn money and prizes. Send me a su p p ly
wading. of magazines an d fu ll in s tr u c tio n s .
The nautical effect may be carried N am e
out by having all your hardware of T h e h a p p y r o a d to m o n e y
brass, such as the door-knob, lan a n d p r iz e s a w a its y o u
terns, brackets and the fastener for City S t a te
the flag-rope. This must be kept
sparkling and bright by polishing
but it will last forever and will not Lumber: One hundred feet of one
ANOTHER rust. Tlie windows may be outlined inch soft wood, fifty feet of one inch
in black or any color you choose. and a quarter, fifty feet of one inch
RECORD BROKEN If you have followed directions and a quarter hard wood, two hun
R ead th is a d c a re fu lly . C o m p a re th e s e D E - carefully, you will have by this time dred feet of two-by-fours, fifty feet
L I V E R E D p ric e s. S en d us on e o rd e r a n d y o u w ill
be a C O U N T R Y C L U B B O O S T E R for life. W e
a permanent vacation playground ... of matched flooring for bottom.
a b s o lu te ly g u a ra n te e th e q u a lity a n d will re p la c e
w ith o u t q u e s tio n a n y m a te ria l p u rc h a s e d fro m us
a safe, useful, comfortable camp on Hardware: Two pairs of hinges,
t h a t is in a n y w a y d e fe c tiv e . the water. Nothing beats a house door fittings, lanterns, brackets, gal
C E LL U L O ID PANTS boat for swimming, fishing or any vanized (rust-proof) nails and
F e a th e rw e ig h t, b lac k cellu lo id p a n ts to fit o u r
1 7 / 8 " c e lluloid w heels. T h e b e s t b a rg a in we h a v e of the out-of-door water sports. Such spikes. Also gallon of white lead for
ev e r offered a t 18c e a c h . T h e s e p a n ts a re .1 3 / 4 " Io n s,
a n d will m ak e a n y m odel lo o k lik e a rac e r. boats as this one have gone down bottom.
U N IT IT E PAPER CEIViENT the Mississippi, and one only a little Fittings: Sack of old iron, spring
T h e la te s t t h in s fo r g lu ein g ja p p a p e r o n b a ls a
w ood. C o m e s in h a n d y th re e in ch tu b e s , 12c ea ch
larger crossed the Gulf of Mexico, board, stout fish-pole for mast, wire
o r th re e tu b e s fo r 30c. went down the coast past the Canal for aerial, one door, two windows,
R U B B ER and anchored in the mouth of the one hundred feet of inch rope for
W E h a v e t h e b e s t r u b b e r s tr a n d o b ta in a b le , a n d
a t th e lo w e st p ric e . If y o u d o u b t th is s ta te m e n t, Amazon! moorings, fifty feet of inch rope or
send us a s ta m p e d e n v e lo p e b e a rin g y o u r c o rre c t
a d d re ss for a fre e tw o -fo o t sa m p le of o u r 1 / 8 " F la t The materials necessary for mak larger for anchor, half roll of tar
C o n te s t R u b b e r S tra n d . U se a d o u b le w in d e r a n d
te s t it fo r b re a k a g e a g a in s t a n y o th e r tw o -fo o t ing this cabin-boat, in the eight by rooting and tacks.
len g th of 1 ,'8 " r u b b e r m o to r o n th e m a r k e t. W e
sto c k 3 / 1 6 " a n d 1 / 8 " F la t, a lso 1 /1 6 " s q u a re r u b b e r
sixteen size suggested, are approxi Tools: The only tools required for
and th e p ric e of a n y size is o n ly 2 ft. p e r c e n t. F u ll
skeins c o n ta in in g a b o u t 225 f t. a t th e fo llo w in g
mately as follows. However, if you this cabin-boat are the very simplest
prices. 3 / 1 6 " F l a t — $1.00, 1 / 8 " F l a t — 95c, 1 /1 6 " use second-hand lumber, you can hammer, saws, square, tape measure,
S q u a re — 90c.
R U BBER L U B R IC A N T
substitute what you have for most etc., plus the auto jacks necessary
O u r C o u n tr y C lu b T w is te r R u b b e r L u b r ic a n t anything listed. for launching, and the rollers.
in cre a se s th e n u m b e r of tu r n s fro m a n y ru b b e r
m o to r by 25 to 5 0 % . O ne oz. 20c. T w o oz. 32c.
C O U N T R Y C LU B BALSASHINE
“ O u r la te s t d isc o v e ry , a liq u id w h ich fills u p th e
pores in B alsa w ood g iv in g it a s h in y a p p e a ra n c e ,
s tr e n g th e n s th e w ood m a te ria lly , a d d in g b u t v e ry
little w e ig h t. 2 oz. 22c; 4 oz. 4 0 c .”
Here's a Novel Light to Make Yourself!
CEIVIENT (Continued from page 22)
T w o oz. G e n u in e A m b ro id C e m e n t, co lo red or
colorless, o r tw o o u n c e s U n ititc -C c m c n t— 25c.
PIAN O W IR E Finish with a light sandpapering. propeller is also attached to this
R u s tp ro o f p ian o w ire N o. 6. N o . 9 o r N o . 11.
2 ft. p e r c e n t. N o . 14, N o . 17 o r N o . 20. 1 ft.
Mark one of these beveled ends piece.
p e r c e n t. “Front”, and measure from it a dis No. 1. Obtain a piece of white pine
W H EELS tance of 5 1/1", or -1 1/4" from the measuring 4 "x 4 "x 2 " thick. Use a
A lu m in u m W h e e ls w ith B alloon T ire s 1 1 /2 " —
13c each . 1 3 / 4 " — 15c e a c h , 2 " — 17c e a ch . F e a th e r
w e ig h t C e lluloid W h e els 1 3 / 8 " — 8c e a c h . 1 7 / 8 " —
top edge of the cut. Make a mark at try-square to insure squared corners,
13c e a c h . 3 " — 16c e a ch , 3 / 4 " h a rd r u b b e r tail
w heels— 6c e a ch .
this point exactly in the center of and sandpaper smooth.
C E L L U L O ID PA R TS the board. Take a brace and auger No. 2. Measure 1 1/2" in from two
F e a th e rw e ig h t celluloid sing le im p re ssio n d u m m y bit, and bore a 1/4" diameter hole opposite sides of the block, and draw
m o to rs— 25c, d o u b le im p re ssio n — 35c. 3 " B la c k
celluloid c o w lin g s— 25c. .0 0 7 5 " T r a n s p a r e n t s h e e t through the board. Bore from the parallel lines along the face of the
celluloid for w ind sh ie ld s, e tc ., 50 sq . in ch e s fo r 8c. top side to (he under side. Sand block. Take your block plane and
PA PER paper is used around the hole on Hatten off the edge, so as to obtain a
2 1 " x 3 1 " J a p a n e s e T issu e , e ith e r M in o S ilk, o r
H ak o n c W h ite , five s h e e ts for 22c. 2 0 " x 3 0 " W ood
V eneer, 17c e a ch . C e llo p h a n e p a p e r 16c p e r s q u a re
both sides to remove excess. bevel, as shown under operation No.
foot. No. 3. On the top face of the 2. When so planing, work from the
W ASHERS board, draw two lines along the edges in toward the center, which
H a rd B rass W a sh e rs w ith .0 3 8 " ho le o r C o p p e r
W a sh e rs w ith .062 hole, th re e d o z e n fo r 18c. sides, each 1" from the side edges. will prevent splitting of the wood.
B EA R IN G S Plane bevels along these sides, as Ao. 3. On one of the two sides
S m all h a lf ro u n d steel w ith .0 2 5 " ho le o r larg e
h a lf r o u n d steel w ith .0 3 5 " ho le, 3c e a ch o r 30c p e r you did on the ends. Finish with which have not been beveled, draw a
dozen.
T U B IN G sandpaper. See that the end bevels line 1" from the edge of the side and
1 / 8 " R u b b e r tu b in g o r 3 / 3 2 " O. D . F ib re tu b in g .
10c p e r ft.
match the side bevels at the points parallel to it. On the opposite side,
DOW ELS where they meet. draw another line 2" from its side
1 /1 6 " D ow els 2 4 " long, 20c p e r d o zen . T h e s e
a re m ad e of a lig h t g ra d e of w h ite b irc h , a n d a re id e a l
No. J/. We now turn the board over edge and parallel to the first line.
for m odel w ork. and work on its under side. Attach Cut a bevel edge, as you did be
DOPE
W e m a n u fa c tu re C o u n tr y C lu b D o p e u n d e r our
a 2" hinge at the front end of the fore, on these two sides. If properl.y
ow n fo rm u la . T r y it a n d y o u will n e v e r u se any board. See to it that the screws do done, the point of the nose block will
th in g else. F o u r oz. 28c, one p in t— 16 oz. 65c.
F o u r one oz. b o ttle s C o lored D o p e , a n y co lo rs you not penetrate through the board. As be 1" square. Sandpaper to a smooth
w ish— 60c. no great stress is placed on the finish.
BALSA W OO D hinge, short screws can be safely
W e s to c k o n ly s e le c te d pieces of g ra d e A -l B a lsa .
T ry a piece of 6 " x 2 " x 3 6 " fo r S l.fO . F o r p ric e s
on o th e r sizes c o n s u lt o u r c a ta lo g . used. RUDDER
B A M BO O A 1/4" groove is now cut on the
1 /1 6 " X 1 / 4 " X 1 2 " pieces of s p lit b a m b o o , 10c
p e r do zen ; 1 5 " le n g th s . 14c p e r d o z e n . S h rc a d e d
under side of the board. This is the This is designated as “P art D”
b a m b o o s trip s a v e ra g in g 1 /3 2 " x 1 / 1 6 " x 1 2 " , 9c
p e r dozen.
same side of the board on which the in the plans. Square up a piece of
C O A TIN G S hinge has been attached. It extends white pine of 1/8" stock 2» 1/2" wide
F o u r oz. of W h ite S h e lla c , B e s t Q u a lity B a n a n a
Oil o r A cetone— 38c.
from the bored 1/4" hole to within and 4" long. Use a try-square to in
STOP W A TC H ES 1/2" of the rear edge, and is 1/4" sure square corners. Sandpaper
D o n ’t guess a t th e d u r a tio n of y o u r flig h ts. T im e deep. Scoop this out with a 1/4" should be used on both faces and on
th e m a c c u ra te ly w ith o n e of o u r 1 /5 S eco n d , 6 jew el
s to p w a tc h e s S7.60 e a c h . T h e h a n d s s to p , s ta r t, chisel after laying out in pencil. all four edges. Note operations No. t
a n d fly b a c k fro m th e ste m .
CA TA LO G
Work from the rear toward the and No. 2.
Send 5. l c U . S. s ta m p s fo r o u r b ig illu s tr a te d bored hole so that if the chisel slips, No. 3. The back edge of the board
c a ta lo g o r b e tte r still send u s a 50c tria l o rd e r a n d
th e c a ta lo g will b e in clu d e d free.
it will go in the hole and not split is not changed in any way, and all
P O STA G E the wood. At the rear end of the cuts are made on the front edge, and
W e p a y th e p o sta g e on all of th e a b o v e ite m s
to all p o in ts in th e U n ite d S ta te s , a n d fo reig n p o s
groove, cut it 1/2" deep, as shown, so the under and top edges. Measure
sessions. C a n a d ia n p o s ta g e e x tra . that the light cord can be easily bent. along the top edge 1 1/2" from the
Coming— Watch for it Finish with sandpaper. front edge and draw a line across
The Country Club Flying Fool the edge.
T h e only fuselage m odel e v e r offered b y C o u n t r y
C lub. T h e re s u lt of T w o Y e a rs of e x p e rim e n ta l NOSE BLOCK Measure along the front edge 7/10"
w ork, in v o lv in g a new id ea in p o w e r fo r m odel a ir
p lan e s w h ic h in su re s a d u r a tio n of tw o a n d a h a lf
from the bottom edge and mark.
to th re e tim e s th e b e s t o b ta in a b le fro m r u b b e r
m o to rs. W e p r e d ic t t h a t th is new m o tiv e p o w e r
Shown in the plans as “P art C”, Draw a line across the face of the
will re v o lu tio n iz e th e m odel a irp la n e in d u s tr y . this block fits over the front end of board from one to the other of these
COUNTRY CLUB AERO SUPPLY COMPANY the fuselage block and is hinged to two lines. Saw along this line and
5 9 t h & H o l m e · St «. K anen« City, Mo. the piece you have just completed. finish the cut smooth with, a plane.
“ W h e r e y o u r d o l l a r h a « m o r e 0 0 0 1 «“ I t acts as a door through which the Measure along the bottom edge 2"
light bulb can be changed, etc. The and mark. From the bottom edge
November, 1930 JUNIOR MECHANICS AND MODEL A IR PL AN E NEWS 43
at the point of this mark, measure which are 1" from each side along edges down until it measures the de
up 1lie face of the board 7/1G". lie- the rear edge. This will form a sired size of S"x24", using a try-
move this piece with a coping saw, small triangle. Remové it by saw square to insure the sides and ends
and finish smooth with sandpaper. ing along the two lines just drawn. being at right angles to each other.
All parts which are to be cut Finish with sandpaper. The eleva Sandpaper the edges smooth.
away, are shown in the plans in tor is now finished. No. 2. Measure 4 1/2" from either
heavy shading ljnes. The rudder is edge and mark. Hereafter, the edge
now finished. WING just chosen becomes the leading edge
of the wing and should be so marked.
ELEVATOR The wing is shown in the plans in Measure 12" from either end of the
five building steps. board and mark at point where the
This is shown as “P art E” in the No. I. Obtain a piece of 1/4" white first mark came. Take a brace and
plans. A piece of 1/S" stock is used, pine stock, measuring 8 1/4" wide bit and bore a 1/4" hole completely
which must measure 5" wide and and 241/4" long. Plane the board’s through the board, working from t lie
G1/2" long. Use a try-square to top to the bottom of the board. Mark
square up the board to these dimen this side of the board “Top”. Make
sions, as is shown under operation sure that the hole is bored at exactly
No. I.
Ao. 2. Locate the center between
A merican the point indicated.
No. 3. Measure 4" from the edge
the two sides of the board, and draw Sky C a d e t s marked as the leading edge, and
a center line its full length. Along draw a line across the top face the
one end edge of the board, measure full length of the board, parallel to
1" from each side and mark. From It is deeply regretted that the leading edge. Draw a line at
this same edge, measure 2" along owing to lack of space we right angles to this line from the
each side and mark. Measure 3/4" have been compelled to omit center of the bored hole to the trail
on each side of the center line at the from this issue the usual re ing edge. Measure 1" on each side
front and opposite end from that on of this last drawn line at the trail
which the other measurements were ports concerning American Sky ing edge and mark. Draw two lines
made. Cadets activities from different from these last two marks to the
Draw two lines from the two parts of the world. points marked on the side edges 4"
marks just made to the marks on the from the leading edge. Saw along
side edges of the board 2" from the However, this and other these two lines, thus removing the
rear end. Saw along these marks. interesting reports will ap shaded portions, as shown in the
Finish smooth with a plane and pear in the next issue of plans. Plane these edges, and finish
sandpaper. These cuts should leave with sandpaper.
the front of the board 1 1/2" wide. J unior M echanics and No. 1/. In this operation the wing
Measure from the rear end of the M o d e l A ir p l a n e N e w s is streamlined. The leading edge re
board along the center line 2 1/2" The Editor. tains its original width of 1/4",
and mark. Draw lines from this though it is slightly rounded along
center mark to the marks first made, its full length. This can be easily
MOSKITO MODELS AND SUPPLIES

M O SK ITO M OSKITO
FLYER TANA GER
$ 1 .0 0 p. p. $ 1 .0 0 p. p.
R e c o rd E n d u r a n c e T his safety model, big
sen satio n of the New
model. Five m inute Y ork A viation Show, is
flights or more easy g u a r a n t e e d R.O.G.,
with our special pro R .O .W . and to rise off
peller and new kind snow or ice. W ill not
of wing construction. dive, tailspin or ground-
K it absolutely com loop. U ses new ly d is
covered safety princi
plete full sized layout. ples. Com plete kit con
Free extra propeller. ta in s bentw ood pro
W ire f i t t i n g s b e n t peller, e x tra propeller
ready to use. Aero blank, all wood cut to
dope and cement, Balsa construction through lit, cem ent, dope, fittin g s already m ade, etc.
out. Adjustable for height or distance. Flics in A lso full size b lu e p rin ts. E v e ry th in g to
small room or out of doors. Own a Moskito m ake this am azingly stable, long flying, safety
Flier—$1.00 postpaid. model, th e best plane.
READ THESE STA RTLIN G PRICES O T H E R M O S K IT O

Orders less than $.50 not filled All prices postpaid.
L a rg e T u b e s A e ro C e m e n t....................... .15 e a ch
2 oz. 1K ittles A e ro D o p e ................................ .20 “" W a s h e r s ....................................................................10 p e r pk g .
B e a rin g s ............................. .................................. 10 “ "
F L Y IN G M O D E L S
2 oz. b o ttle s t h i n n e r .................................... .20 P r o p e lle r B lo c k s (S h ap ed ) 6" lo n g . . .08 each
Besides the models shown above we have
C em ent in C a n s — 2 o z .................................. .25 " 2c fo r each a d d itio n a l inch of
S m all tu b e s c e m e n t...................................... .10
.10 "" le n g th up to 16".
.10 each
model kits of three other M oskito Planes.
B o ttle s B a n a n a Oil w ith b r u s h ........... P ro p e lle r B lo ck s (S h a p ed ) 7" lo n g
8" - .1 42
S h e e ts J a p T is s u e P a p e r 21 x 25" . . . .05 " The following models are guaranteed to
S h e e ts J a p B am boo P a p e r 24 x 3 6 " .. .14 "
S h e e ts C e llo p h a n e .12 **
12 x 2 4 " . . . . 119"
01"" .1
.16
have same fine quality of design, proven per
formance and expert construction as those
S h e e ts T h re e P ly V e n e e r 1 2 x 2 4 " . . . .30 '* .IS
162""
1 .2 0
F o llo w in g s tr i p s of r u b b e r in le n g th s already described. K its for all three planes
of 25 a n d 100 ie e t— .28 named below are absolutely complete with
1 / 1 6 x 1 / 3 2 " ...................................................... .01 p e r fo o t
.01 ·"■ ""
1 / 1 6 x 1 / 1 6 " ......................................................
B e n tw o o d P r o p e lle rs 6" l o n g .. . .12 extra propeller blanks, full size plans, etc.
.02
1 /8 X 1 /8 " ...........................................................
.01 ** "
2c fo r each a d d itio n a l inch of
le n g th up to 16". Im m ediate shipm ent.
1 /8 " f l a t ............................................................... BABY R.O.G.— 50c PO STPA ID
.οι
3 /1 6 " f l a t ............................................................. Ά 7" lo n g . ....................14
8" “ . ....................16
**
“ H alf size duplicate of M oskito Flier. Has
P cs. No. 60 D rill W ir e 36" lo n g ......... .10 each
P ia n o W ire . 10 ft. r o l l s ............................. .01 p e r fo o t 9 " '* . ....................18 ·' m ade 4 m inute flights indoors.
S pools of S te e l H a ir W i r e ......................... .10 ea ch 10" " . ....................20 "
Pcs. F la t B am boo each 15" lo n g ......... .02 “
W in d e rs ............................................................... .30 “
11" "
12" '*
. ....................22
. ....................24
-
"
T W IN P U SH E R — $2.25 POST PAID
10 m inute flights, all balsa, wingspread 30";
P a c k a g e s A lu m in u m P o w d e r ..................
F ittin g s — E n v e lo p e s c o n ta in in g
.10 **th e
16" . .............. \ 3 2 " weight 2*4 ozs. R eady to build with parts
follo w in g — 1 p ro p e lle r h a n g e r, 1 S lic k s .. formed. Free winder.
s h a ft. 1 s m a ll w in g clip . 1 la rg e S m a ll W h e e ls ....................02 ** C A BIN T R A N SPO R T — $2.75
w in g clip. 1 w ire can . 1 r e a r h o o k , ....................03 “
tw o w a s h e r s , tw o b e a r i n g s ........... .10 p e r p k g . L a rg e W h e e l s .. H as flown 1000 feet. 36" wingspread; weight
3 ozs. All Balsa. 12" pro p ail carved. Ribs
MOSKITO FLIER CO., 11 w . 4 2 n d St., N. Y. C. and fuselage sides made.
44 J unior M echanics and M odel A i r p l a n e news
done witli a small block plane. It which will be closest to the observer
FLY A is then finished with sandpaper. when the fixture is hung.
Note that the bottom of the wing The axle is made of the same ma
“ ROTOR KITE" is not changed, all (lie streamlining
being done from the top face of (lie
terial and is 1/4" x 1/4" x 8" long. It
is also streamlined, the work being
T H E L A T E S T F L Y IN G W O N D ER
wood. A smooth plane will be found accomplished in the same manner.
best for this work, but if one is not Finish to a satin finish with sanding.
available, the block plane will do The two wheels must, of course, be
the work. Plane along the length of exact duplicates. Obtain a piece of
the board with the grain, and never white pine measuring 11/4" wide
against it. and 21/2" long. The stock should
Do not plane the trailing edge to be 3/8" thick. Take your pencil com
a knife-like edge, but leave about pass, set it to make a 11/1" diameter
1/32" thickness there. While remov circle by spreading the needle point
ing this surplus surface wood, use and the pencil 5/8" apart, and draw
your try-square frequently to see a line along its length through the
that (he face on which you are cut center of the board. Then place the
ting retains its smooth flåt surface. pencil on one end, press the needle
A R evolving cylinder m akes it fly. No When the wing looks about fin point into the center line, and draw
W ings, P ro p ellers o r R ubber M otors. a circle.
M ost sen satio n al d e v elo p m en t since the
ished, lay aside your plane, and
beginning of A viation. finish (lie work with sandpaper. Repeat this process on the other
E asy to build th is two foot “ R O TO R Flat surfaces, such as this,· should end of the board. Saw the board
K IT E ” from com plete set of p a rts , fit
tings, glue and in stru c tio n s included in
be finished with the sandpaper apart at the point where the two cir
construction k it for only $1.50. A d e sc rip wrapped around a square block of cles meet, and cut out the circles
tion of “ W h y th e R o to r K ite F lies” is
also included.
wood, so that it will leave a flat sur with your knife. Do not cut past the
Send $1.50 now and we will deliver your face. The two ends of the wing can pencilled circle, but be sure to cut
set post paid. be slightly tapered to a rounded exactly up to it at all points. Round
Be a m o n g _ the first to build and fly edge, if desired. the edges of each Wheel, as a tire is
the la te st scientific m arv el. N oth in g like
it anyw here. No. 5. The wing is now completely rounded, and sandpaper smooth. The
T he “ R otor K ite” is ideal for lau n ch finished, except for (he rounding of parts for the landing gear are now
ing model gliders. the wing tips. This operation is completed. Model airplane wheels
optional with (he builder, as some may be substituted if desired by the
prefer (he squared tip. If so, do not builder.
complete this operation. Those wish
ing (o finish the wing lips, as shown TAIL SKID
ill the plans, should first lay out the
work with a compass. Locate the A 1/4" diameter, round dowel
center of (he square wing tips, as stick is used for the tail skid. It is
they are now, and draw a line across 2" long and should be beveled at the
the (op of (he wing parallel to the two ends, so that it will fit snugly
leading edge. Measure 2 1/2" in against the bottom of the fuselage
from each end of the wing along this and will also look as if it were ready
line. Set your compass to draw a for use on the ground end.
circle with a diameter of 5". This is
Y o u can also build a Tw in pusher
“ ROTOR A IR P L A N E ” which flies b e a u done by spacing the needle point PROPELLER
tifully. W e will send a com plete full size and the pencil 21/2" apart.
layout, show ing all d etails and com plete
building in stru c tio n s for 25c or com plete Lay the needle point of the com The propeller may be carved from
constru ctio n k it for $2.50. pass on the point you have marked a 1/2" X3/8" XC" balsa propeller
R em it by postal o r ex p ress m oney order. 21/2" from the end, and draw a half blank or block, but it will be much
Dealer and Salesmen Inquiries circle from the leading edge through better looking if made of mahogany.
Invited. the end edge of the wing to (lie trail If the builder is carving his own,
ing edge. Do this on both ends. the usual standard method is used.
R O T O R AIRPLANE Round the ends to these circle lines Mahogany propellers may be pur
AND K I T E CO M P ANY with a block plane, starting from chased at any model supply store,
(he leading edge around to the center and are apt to give better satisfac
12 E. 175th St., NEW Y O R K C I T Y of the end edge. Then turn the board tion than if the builder makes his
around and plane from the trailing own.
edge to the center of the end. This All parts for the construction of
BALSA WOOD SALE will prevent splitting. the fixture are now finished, each of
F in e st G ratie, F re e from D e fe c t S to c k 3 6 ” :
1 /3 2 " X 2” _________ 3 p iec e s................. 22 The wing is now Completely fin which should be carefully checked as
1 /1 6 " X 2 " .............. 3 p iec e s................. 25
I /8 ” X 2” ______________________ 3 p ie c e s -------------30
ished. and should be given a to measurements before the work is
1 / 8 ” X 1 I S " . ................ 12 p iec e s..................18
1 /1 6 " X 1 / 1 6 " ................................ 12 p iec e s................... 15
thorough sanding with a light sand continued.
M in im u m o r d e :_____ .5 0 — P a c k in g c h a rg e ------ .10
C a ta lo g u e 2c
paper for a satin finish.
BILTM O R E M OD EL AIRC RA FT SU PPLY ASSEMBLY
L a k e la n d , Florida
LANDING GEAR
Before starting actual assembling,
HERE IS A CONSTANT WINNER! The landing gear is constructed of read these instructions through care
c a n be b u ilt b y m o st in ex p e rie n c e d seven parts: four struts, one axle fully, handling each part as it is
and two wheels. The four struts are referred to, and making sure that
B oys, h e re is
a m odel t h a t made from white pine, each 1/4" x each step is thoroughly understood
is e a sy
b u ild , lo o k s
to
1/4" X5" long. Cut these five pieces before proceeding to the next. It
good, has a
20" w ing-
to the correct size. They are stream would be disappointing to spoil all
8 p an , w eighs
only J j ox.
lined, as is shown in the end view the work so far accomplished by
c p i., a n d is in the plans,· which can best be done blundering in the assembling, so that
A c tu a l U nreloucheil Photo j*n with an ordinary pen knife. careful attention is necessary.
F L IF .R I C o m p le te K it, w ith F U L L -S IZ E
p rin ts . a n d e x tr a m a te ria ls ____$1.15
b lu e
p o s tp a id . Note that both faces of the struts The first step in the assembling is
B a b y R . O. G . K it, w ith p lan s, c p i_____________ 2 5 c are streamlined, instead of only one the hardest, inasmuch as the light
United Model Airplane &
face, as in the case of the wing. ing attachments are now assembled.
Supply Company,
Finish these with sandpapering. Decide at this time about how low
1291 Clinton Ave., Irvington, N. J.
Take special pains in finishing these you wish the fixture to hang from
small parts as they are the pieces your ceiling, and then add 10" to
November, 1980 JUNIOR MECHANICS AND MODEL A I R PL AN E NEWS 45
this length. Obtain a heavy duty
electric light cord of the desired
length. Let us say, for example, that BROTHER ACES
you wish the fixture to hang 12"
below the ceiling. The length of
the cord you would then buy would
CHOOSE theplane you’d
be 12" plus 10" or 22" long. Here’s a range of model planes that are just waiting for the gun! Every scale
Take the cord and thrust it model is a true miniature. Every stick model is designed for perfect balance and
through the hole in the top of the all are guaranteed to fly when built according to instructions and drawings included
fuselage. Push it down until it can with each set. Make this your fleet.
he seen through the larger hole of
the fuselage. Take a small pair of
pliers, grasp the end of the cord and
carefully work it through the big
hole. Pull it through until the extra
10" are outside of the large hole.
BTAIN an electric light socket
O from any Five and Ten Cent wSAe igV hOsIAle s Ms AthRa nC Hoz.E T TCI o m2 p lete
store, or an electrical shop, and con
nect the wire to the socket. If you
F t . F ly in g S cale M odel
s e t .............................$2.50
V O U C H T N A V Y -C O R S A IR 2 F t. F ly in g Scale M odel
w ith d u m m y m o to r. C o m p le te s e t .............................$3.75
have never done this, ask the store

keeper to explain the process. The
diameter of the average brass socket
is about 1 8/8", so it can be easily
slipped in the 1 1/2" hole through
which you have worked the cord. If
the cord you have is silk covered on
the outside, wrap it tightly in M E R R O W T W I N B O M B E R — R. O. G. T y p e . W ill
mechanic’s adhesive tape. m a k e a good clim b an d d ro p s b om bs w h ile in flig h t.
C o m p le te s e t ............................................................................. $1.25
C U R T IS S A R M Y H A W K 2 F t. F ly in g S cale M odel
w ith s h a p ed n o s e a n d co w lin g b lo ck . C o m p le te s e t
When so wrapped, start working ............................................................... ............................................ $3.00
the cord back through the large and
small holes, until the socket has en
tered the large hole, as shown in the
plans under “Lighting Assembly”.
Do not allow the socket to enter the
hole loo deeply, as you would then
have trouble screwing in the bulb.
When in place, cut some small
wood wedges, a little larger in width P R IM A R Y G L ID E R w ith p ro p e lle r an d ru b b e r m o to r. Sc eIKlleOnRt S flie K Y A M P H IB IA N 2 F t . F ly in g M odel. E x
r, in d o o rs o r o u t. W e ig h s a b o u t 1
than the average common match fly. C o m p le te s e t ................................................................$0.75
Filli s iz e d ra w in g s w ith in s tr u c tio n s to bu ild an d C o m p le te s e t ............................................................... !$2?75
stick, and wedge these in between
the socket and the sides of the large
hole, so that the socket will be held
tightly in place. Lay the cord along
the top of the fuselage, as is shown
in the plans, and tie a knot in it just
at the point where it bends upward
to go through the hole bored in the
fuselage roof.
Before proceeding with the light L O C K H E E D S I R I U S 2 F t . F ly in g S c a le M odel w ith
ing arrangement, attach the nose Lr eOc tio C K H E E D S IR IU S c o n s tr u c tio n s e t w ith lu ll d i
n s , d r a w in g s an d su p p lie s . C o m p le te s e t . . . $3.00
N. A. C. Λ. C o w lin g - P a n ts a n d C o n e P ro p e lle r.
C o m p le te s e t ...............................................................................$3.00
piece to the fuselage roof piece by Also a 12" Prim ary Model Glider for beginners. Full size drawings and instructions make
means of the hinge which was building easy. Fram e light weight colored balsa. Tissue printed wings, assem bled with wire
screwed to the fuselage roof. The parts, has adjustable nose balance. Complete construction s e t.................................................. 50c
hinge is attached to the flat side of T h e Ideal H a n d y S u p p ly K it c o n ta in in g b a ls a w ood, J a p tis s u e , c e m e n t, do p e, w ire,
the nose piece, shown as “P art C”, r u b b e r, e tc ., th e m a te ria l every m o d e l b u ild e r sh o u ld have. All fo r $1.10 P o s tp a id .
and at the upper edge of it. SEND 5c TODA Y for 32-page illustrated catalogue of M odels and Supplies.
Be sure that the screws do not xt_ P O T ) All goods guaranteed or money refunded. Orders for
protrude through the wood. The ου. less than $1.00 add 10c for postage. $1.00 or more add 10%.
wing is now attached to the fuselage
roof piece. The straight edge of the
wing (leading edge) goes toward the
front of the fuselage roof piece,
which is the end to which the nose
N A T IO N A L '
I Aevery
I of
W c w a n t one dealer^ or a g en t in 1
th e
tow n to handle N ational Model ■
irplane S ets and supplies. B ecause 1
ir proven qu a lity , a N ational i
J model dealer w ith sets and p a rts to I
piece is attached. The leading edge M ODEL A IR C R A FT I supply im m ediate w a n ts can m ake *
: big m oney. W rite for full details. 1
of the wing should coincide with the AN D SUPPLY CO. N a m e ... I
top edge of the fuselage roof, so that A ddress
I
only the beveled edge shows beyond 2 9N orth Avc., Dept. A 2,N ew R ochclle,N . Y. r i ’J
the wing’s edge.
The wing should be perfectly cen SURE WINNERS! Full “ SPECIAL OFFER”
tered on the roof piece, so that the Μ t. hI e L o w e s ,t rPj r i· c e s C onatruc- t
jfan Plane sue M odel builders here’s your chance to get
leading edge of the wing and the side S et
M E R C U R Y . A m erican Schneider C up E n try ................. $ 2 .0 5 ... .75c
w onderful value a t b a rg a in prices.
edges of the fuselage roof piece form B A R L IN G N -U-3. W orld Record Holder for L ightplane 2 . 0 5 .. . .75c 85 fe e t of % flat ru b b e r fresh stock.
C U R T IS S HA W K P9, M ilitary P u rsu it............................. 2 . 0 5 . . . . 75c 3 sheets of super-fine tissue.
perfect right angles. Test this with V O U G H T C O R S A IR . 'Ey«*« of th e F leet” ....................... 2 .05
L O C K H E E D V E G A . Am erican Air Exprcee.................... 2 .0 5 .. . .75c
75c
•1 feet of piano w ire.
your tiy-square. The hole of the L O C K H E E D LOW W IN G . I.in d y ’e Do* S t a r ................ 2 .0 5 ... .75c 2 oz. b o ttle of b a n an a oil.
A LB A TR O SS DV, Fam ous W ar P la n e ...............................3 .75 _____75c
C U R T IS S T A N A G E R SA F E T Y P L A N E ........................3 .7 5 _____75c You can g e t all this for $.65 postpaid. Send
wing should be directly above and IL L U S T R A T E D C A T A L O G U E A N D P R IC E L IS T ..................... !5c
E vcrv C O N S T R U C T IO N O U T F IT contain», all part* actual aixe.
in your o rd er for th is b a rg a in a t once. Send
in line with the hole of the roof. F U L L S IZ E D blueprint» and plans. m oney ord er, d ra ft, o r check. No. C. O. D.
A dd 35c ex tra for insurance and packing in crash p ro o f boxes. B arg ain list $.10
Attach these two parts with am A dd 10c ex tra for packing w hen ordering p lans only. Watch for next month's offer.
broid or any good wood cement. K A Y M O DEL A IR C R A FT Red B ird M odel A irplanes & Supplies
S -1 1 6 -2 1 s t A v e n u e B ro o k ly n , N ew Y o rk 1615 M aple S t., O m aha, N ebr.
When attaching, it will be best to
46 J u n i o r M e c h a n i c s a n d M o d e l A i r p l a n e N e w s
thrust a 1/4" dowel stick through the which are attached in place first, are
Flying Squadron Sor $2°? two holes of the pieces to insure that duplicates in size, both being 3"
these are perfectly lined up. high and 7 1/2" long. The bottom
The elevator is now thrust in the piece, which alone forms the bottom
G reat 1/8" slot cut in (lie tail of the fuse of the cabin, is 3" wide and S" long.
B a r g a in lage piece and firmly cemented into If you do not understand glass cut
F iv e [ 5 } F ly in g A irp la n e s t o r $ 2 .0 0 T h a t
place. See that it is in line with, the ting, ask your nearest hardware
P e rf o rm L ik e th e R e a l T h in g ! fuselage when cementing. The rud dealer to supply these three pieces
K o t c o n s tr u c tio n s e t a b u t n e a r ly a s s e m b le d P la n e s .
G u a r a n te e d to F ly . der is attached to the fuselage just of glass.
1) LONE E A G L E B O M B E R —28 in c h w o o d fr a m e p a p e r c o v
e r e d W in « : 7 in . a lu m . P r o p e lle r ; 17 In . s e t R u b b e r M o to rs ; above the elevator with its straight The two side pieces fit in the cabin,
' * " if t.f llg b tir - - · ■ —
F bO ISb b M U M O w J T * * 2 0 in . nOil’UiCUMUIVn o n -b rc a k a 6 le W in # ; nv^in.
IMiiHi 11 "i *»*·
a lu m . P r o p e lle r ; F le x ib le L u n d in # G e a r; 12 in . s e t R u b b e r
edge toward the back. (See ‘“Assem rest on the two 1/2" bottom project
M o to rs ; t a k e s otT » r o u n d : 160 f t . flig h ts ; w e ig h t2 H o z.
3 ) LONE E A G L E M O T H —In in ch H a lsa W o o d W in g ; 4 % in c h bly” in the plans). ing· shelves, and are held in place by
m e ta l P ro p c llo r : 150 f t . flig h ts ; w e ig h t y> o z.
4) G R E A T e a g l e : G L ID E R - 10 in c h n o n - b r e a k a b le W in g ; When attaching it, make sure that your wood cement. Apply it to the
c a b in ty p o F u e e la g o ; H ig V a lu e .
5) LONE E A G LE G L ID E R - 1 2 inch Balsa Wood Wing; cabin
tv p o F u s e la g e ; d o e s n il s tu n t s .
__
it is in line with the fuselage. Use wood of the fuselage, as well as to
E a c h a c t in in d iv id u a l b o x c s ;u !l p a c k e d In o n o s h ip p in g c a r to n .
C o m p le te w ith i n t e r e s tin g In s tr u c tio n B o o k le t.
ambroid or any good wood cement the glass, for the best results. The
ALL FIV E [ { ] FOR $2.00 for this purpose. The dowel tail bottom piece of glass is not cemented
B u y f r o m y o u r lo ca l d e a le r s . I f n o t i n sto c k , o r d e r
d ir e c t f r o m u s . ICc p a y p o sta g e. skid is now attached. A 1/4" di to the cabin, for it must be remov
W ild e i* M f q r C o . ^ A i r c r a f t M o d e l D iv. ameter hole is bored in the bottom able so that any necessary electrical
of the fuselage piece 2 1/2" from the work, such as changing bulbs, etc.,
rear end and in the exact center. may be accomplished with ease. It
Apply cement to the dowel stick, rests on the same two projections,
N E W S C IE N T IF IC W O N D E R
thrust in the hole 1/4" and allow to which hold the side pieces, and in
dry. See that when the hole is bored, between them.
it is slanting toward (he front of the It may be found that the glass you
fuselage, so that when the tail skid have obtained is so thin that this
is placed in it, the tail skid will bottom piece will be too narrow for
3 fo r 25 c B I G F U .. ________ slant toward the rear. the width of the bottom, and if so, a
r j / v u g
D VS T w
Y ou a p p a re n tly see t h r u C lothes, W ood,
Stono, a n y o b jec t. See B ones in F lesh . wider piece should be obtained. This
F K E ii I’fcg. ra d io p ic tu r e film s, ta k e s p ic tu r e s w ith o u t
c a m e ra, " y o u ' l l l i k e ' e m . " 1 p k i r . w i t h e a c h 2 S c o r d e r . MALL-TIEAD brads 1/2" long will allow the glass to be easily
M a rv e l M fg . C o ., D e p t. 93, N e w H a v e n , C o n n . hold the wheels of the landing slipped in or out, and will yet hold
gear on the axle. These should be it from slipping from side to side.
M ID G E T M O D E L S
M ID G E T H Y D R O P L A N E , II" w ing eproad, Ö" m otor ntick. 2-6"
carefully driven through the center To make sure of this measurement,
nontoons. K it w ith w ire p n rts form ed, each ...................................f.0 0
M ID G E T R . O. G . 0 " w ing spread. 4 " m otor »tick, com plete k it
of each wheel and in Hie ends of the cut a piece of heavy paper until it
ovc. __________I ......... .............H axle. (Note “Landing Gear Assem is the desired width and then
R U B B E R / / S " flat ru b b e r, per sk rin (220 f t . ) .................................... v<
W H E E L S S p o n sc ru b b er tirre m ounted on alum inum disc wheels, bly” in the plans). measure it for width.
I X din. 20c pr., 1 Í Í " dia. 28c pr., 2 " dia. 30c pr. (N o etuinpa ac
cep ted for a n y th in * .)
S e n d S c (coin) f o r c a ta lo g .
The four 5" struts hold the axle The electric cord, which comes
T H E M O D EL AERO SH O P. BAY C R E ST ,
H U N T IN G T O N , N. Y.
and its two wheels to the fuselage. from the fuselage, is now thrust
Two of these extend from the front through the fuselage roof piece and
of the fuselage piece, at its bottom, the wing. As you have already so
H e r e ’s $ 5 ,0 0 to the axle, while the other two ex attached these two pieces that their
tend from the rear end of the level two holes are in line with each other,
8" long part of the fuselage to the the cord should pass through them
axle. Ambroid or any good wood easily. Thrust it through the bot
for your cement is used for this purpose. tom of the roof piece and out of the
(Note these positions under “As top of the wing.
sembly”.) Pull the cord through until the
A small head brad, or a common knot you have tied in it stops its
N e x t Model! pin is used as a propeller hook, ex progress. Apply ambroid to the top
cept that it is not made into a hook, of tlie fuselage piece where the fuse
as would he done in the case of rub lage roof comes in contact with it,
And we mean i t ! For you can earn ber-driven model. Drive it through and press the roof piece and wing
$5.00 almost as easily and ciuickly as the center of the hub of the propeller in plade. When doing this, test for
you can ask for it. and in the center of the 1" square correct position by being sure that
Model Airplane materials and kits part of the nose block. the nose piece, which you have
cost money of course. But there is no If the propeller is bought, and al hinged to the roof piece, fits tightly
reason in the world why you should not ready has a hole in its hub, a large against the front of the fuselage
build as many and as expensive models head nail is used. Care must he ex piece, and that the top, bottom and
as you wish. For we have worked out ercised not to split the nose block sides of both match each other. Two
a plan through which you can earn when applying the nail to it. 2" nails are now driven through the
enough in just part of your spare time.
We are now ready to finish the in roof piece in the fuselage piece, at
We need several wide-awake repre terior of the “cabin”. Three pieces the point where the roof and the
sentatives right away, to take subscrip of common window glass are used fuselage meet at the rear, without
tions for P hysical C ulture ,T rue S tory for this purpose. The side pieces, the wing.
and the other popular Macfadden maga
zines. All around you, you can easily
find people who will be glad to sub
scribe. And in scarcely any time at
a ll, y o u c a n earn from $5.00 to $10.00. Necessary Materials
J u st sign and m ail the coupon below, and
we w ill send you the full p a rtic u la rs of our (Note·. W here "w o o d ” is ind icated , u s e w h ite p in e o r b alsa)
plan! 1 12" x 2 1 12" X 20" wood wings
2 pieces1
1 piece 1 /4 " X 3" X 12" wood tail surfaces
1 piece 1 1 /2 " X 1 3 /4 " X 12" wood fuselage
Name................................................................. 2 blocks1 1 1 1 /8" X 1 1 /8" X 5" wood m otors
3 strips bam boo s tru ts , etc.
S treet & N o................................................................. 1 pair 1 18" diam eter wheels to fit 1 /16" d ia m e ter axle
1 piece 1 18" X 1 /4 " X 6" wood shock absorber
1 piece celluloid w indshield
2 pieces 1 /2 " X 1" X 1" wood ra d ia to r .
C ity ................................................ S ta te ........................ 1 /16" 1" 6 " wood propeller blades
1 piece X X
M ail C o u p o n to 1 /2 oz can ' am broid
1 package model m aking pins
A g en cy D e p t. D esk A -11 1 spool w hite c o tto n
5 dozen ban k pins ex h au st stack s
M odel A ir p l a n e N ew s P a in ts: yellow, olive drab. Sm all q u a n tity of red, w hite, blue a nd black
1926 B ro a d w ay N ew Y o rk , N . Y.
November, 1930 JUNIOR MECHANICS AND MODEL A IR PL AN E NEWS 47
Care must be taken not to drive
the nails in tlie cord, so it is best to
lay out in pencil on the top of the O Hw. a kb oinyg, uc pa nC't hyr iso utmjauss tmsec yourself
o rn in g , a n d
roof tlie position of the groove hold Y O U N E E D N O T BE fin d in g y o u r S elley m o d el all re a d y
w a itin g fo r y o u — yo u r G lid er, o r G u ll, o r K ellanca. A nd
ing the cord. Drive the two nails th e n w h e n y o u o p e n th e box, a n d see how a ll th e h a rd
on each side of this groove. Small- an E X P E R T to B U I L D p a r t of th e w o rk is done fo r y o u — a n d see th e d ire c tio n s
a n d th e f u l l \iz e p la n s w ith e v e ry tin ie s t d e ta il of assem
head brads should be used, and a b lin g sh o w n so c le a rly t h a t i t's j u s t lik e 1. 2, 3 p u ttin g
y o u r p la n e to g e th e r — a n d th e n th e final th rill of p u ttin g
nail set applied. a SELLEY MODEL yo u r s h ip in th e a ir a n d w a tc h in g h e r sail aw'ay like the
real fly er sh e is! B e tte r p ick y o u r k it now, a n d th e n go
The electric lamp space in the fuse to y o u r d e a le r, o r se n d d ire c t to us.
lage is large enough to hold a fifty
or seventy-five watt bulb. Use a
frosted Mazda lamp, as the glass at
the bottom of the fixture is clear, and • W hich Selley Model
a frosted lamp greatly adds to the
appearance.
When the ambroid or wood cement W ill Be on Y O U R X m a s List?
has hardened, remove all excess with
a knife, fill the nail holes and cracks PR IM A R Y G L ID E R
with plastic wood, and finish by I t g lides s tr a ig h t and
sandpapering the whole structure tru e fo r long d ista n c e s .
W in g sp a n , 3 7 " .
lightly. At this time, the rear of
the fuselage roof piece must be
slightly trimmed, so that it will GULL
match the form of the fuselage, Featherweight F ly in g
where it narrows toward the tail. Contest Kit S c a le M o d e ls
(See P art B—No. 4)· A 3 0 "-w in g , all-b alsa E n
d u ra n c e T r a c to r w ith a S im p le st, m o st realistic
carved balsa propeller— no fliers — lig h te r, stronger,
b lan k s, n o b e n t p ro p s. m o re d u ra b le t h a n o th ers
FINISH I-’lies tw o m in u te s o r m o re S e lle y S C A L E M O D E L G L I D E R S — e a sie r to b u ild a n d fly
on b ird - lik e c a m b e re d lo n g er. Sold sem i-built,
The inside of the cabin should be w ings. C o m p le te w ith full-
size p la n s a n d d e ta ile d d i fir s t . . . b ig g e s t . . . b e s t
w ith u n b re a k a b le a d ju s t
a b le -p itc h a lu m in u m pro
silvered with silver paint. Apply re c tio n s . _ —
P o s t p a i d ............... Φ Ι . 0 0
p eller. r e a d y -b u ilt fuselage
sides, r u b b e r tire d wheels,
this to all parts of the interior cabin, e tc . E a s ily ta k e n a p a r t for
p a c k in g . C o m p le te kits,
except the glass. This acts as a re A D V A N C E D G L ID E R p o stp a id
flector and greatly adds to the light P a tte r n e d a fte r C a p t. H a w k s ’
fam o u s E a g l e t . W i n g
C u rtis s Ace. & Λ n r-
ing effect of the fixture. span. 4 2 ".
2 8 " w ing sp a n Φ 1! · * « )
If a mahogany propeller has been $2.15

J u n k e rs B rem en,
3 6 " w in g sp an 6 .2 5
used, polish it with any good fur LARK P o stp aid B e lla n c a
niture polish. If other wood has C o lu m b ia
6 .75
been used, stain it mahogany. Featherweight 3 9 " w in g sp an
Paint the nose piece, landing gear, R. O. G. S p irit of

R ises of! g ro u n d fo r long S t. L ouis. 7.2 5
and tail skid jet black. The rudder flig h ts. l8 " - w in g
D iffic u lt p a r t s r e a d y -
sp a n . 3 9 " w in g sp a n
should be finished in red, white and fo rm e d . F u ll-size p lans, S tin s o n B iplane,
3 8 " w in g sp a n 7 .75
blue; dividing the width in three all to o ls in clu d e d . r> rr —
P o s tp a id ........................ v O C
equal strips, and applying one of the
three above colors to each.
Paint the wing on both sides sil You Should Know C C f tin pr Λ A sk y o u r dealer.
ver, which will also assist to deflect Send Now! About These Selley
O L N U O C o r send 5c for
c o m p le te c a ta lo g u e of S e lle y supplies
the light. The body, or fuselage, the I t ’s n o t to o e a rly to s ta r t th in k Supplies a n ti m odels.
b u ild e r n eeds.
E v e r y th in g a m odel-
elevator and the wheels should be of ing a b o u t C h ristm a s . If y o u r

d e a le r c a n n o t su p p ly yo u . send Selley A d ju s ta b le P itc h
one color. This is left to the build d ire c t to us. now. D o n 't d e la y ,
especially if y o u w a n t one of
A lu m in u m P ro p e lle r, lig h t
a n d unbreakable 8 " , 60c;
er's opinion. Bed makes a splendid th e p o p u la r new Selley G lid ers
T h e y a re o u r m o st p o p u lar
10 ", 75c. T h re e -b la d e d .
combination with the other colors. n u m b e r th is y ear, a n d selling
fast. L ik e e v e ry o th e r Selley
a d ju s ta b le a lu m in u m p ro
p ellers: 8 " . $ 1 .0 0 : 10",
If manufactured wheels have been m odel, th e y a re scien tifica lly $1.15. N e w — g e n u in e G o o d
applied, leave them as they are, but, designed a n d tested b y a n e x p e rt
w ho h a s been b u ild in g reco rd -
rich
ru b b er
S ilv c rto w n
tire d
ballo o n
a lu m in u m
if you have made your own, paint sm a sh in g m o d els fo r 2 1 years!
W e m ak e no a b s u rd c la im s for w heels, 2 " d ia m e te r: 75c
the rims white to give the ell'ect of
rubber tires.
im p o ssib le flig h ts, b u t we do
say th is — e v e ry Selley k it is
guaranteed— yo u r m oney hack
if y o u 're n o t satisfied . W h a t
a p a ir. a lu m in u m d isc
r u b b e r tir e d w heels, 25c
p a ir. M o d e l-m a k e r's K m fe:
Seliey
m ore c a n anyone s a y ? safe, s h a rp , h a n d y . H as M f jg . C o . , I n c .
ra z o r b la d e fo ld in g in to
HANGING A d d I5 c t o all p r i c e · f o r W e i t s tro n g m eta l h a n d le . 18c 1379 Gates Ave., Brooklyn, N. Y.
of M ississip p i o r C a n n d a . p o s tp a id . P io n e er M o d el B u ild e r s S in ce 1909
Open the nose door, remove the
bottom glass and polish the side
glasses. Then place a Mazda frosted
lamp in the socket, clean the bottom W h e n . R e p ly in g to A d v e rtis e m e n ts P lea se
glass, place in position and close
down the nose door. If the hinge is M e n tio n “M O D E L A IR P L A N E N E W S ”
not tight enough to hold the door
tightly against the front of the fuse
lage, a pin may be thrust through CABINAIRE JR.
the bottom corner of the nose piece 24 in. Span, 3-8 oz.
in the 1/2" square shelf on one side. E n d u r a n c e of 1 M i n u t e
However, the weight of the pro K I T $1.00 P. P.
peller usually holds this in place. M o d el d e sig n e d to fly in d o o rs or
o u t, h a n d la u n c h e d o r R .O .G . F u lly
If you thoroughly understand elec c o n s tr u c te d fra m e w o rk m odel (ex cep t
tric;! 1 work, you may make your own fu se la g e). All b a lsa . C a b in job w ith
isin g la ss fo r w in d o w s. A d ju s ta b le
ceiling connection, but if not, have w ings. B u iltlin g tim e Ά h o u r. G u a r
a n te e d to fly o r M o n e y B ack. K it
an electrician do this. c o n ta in s all p a r t s in c lu d in g R e a r
H o o k , b e a rin g , fin ish ed p ro p eller, a s
P.e sure to shut oil' the main cur s e m b le d la n d in g g e a r sp a rs , wing
ed ges, e tc ., c u t to size. A real rock
rent. before working on the ceiling b o tto m v a lu e a t Si 00. P o s tp a id . __
connection. You will find, possibly, O th e r K its ,— F ly in g G lo ry , 2 7 " S p a n — $3.75; S p irit U . S. B oy, 2 8 " S p a n — $ 2.95: G lid er, 56'* S p a n — S2.75.
All fam o u s fo r s tr e n g th , b e a u ty a n d p e rfo rm a n c e . P o s tp a id . . . . . . , . ,
that the cord is too long, in which 5c fo r p ric e lis t w ith c o m p le te d e ta ils of e n tire C re s c e n t lin e of m o d els a n d su p p lies. G e t o u r low prices o n b a ls a
a n d m odel m a te ria ls a n d y o u will w a n t no o th e r.
case, it can be easily cut to desired C R ESC EN T M O D EL A IR C R A F T 1805 BENSON Ave., B R O O K L Y N , N. Y.
length.
L o w est P ric e s in th e
Gliding and Soaring
C o u n tr y o n all
M a te r ia ls !
SM A S C O N O W O F F E R S T H E A IR P L A N E
M OD EL L E A G U E O F A M E R IC A ’S K IT S .
P O S T P A ID A T L I S T P R IC E S .
A .M .L .A . K it N o. 1 B aby R .O .G
(fin ish e d p r o p ) ................................^
S enior R .O .G ., A .M .L .A . K it N o. 2 ...................75
C u lv c r-M o tt Indoor T ra c to r. A .M .L .A .
No. 3 . . .
In d o o r E n d u ra n c e F u s e la g e M odel,
A .M .L A. K it N o. C - 4 .............. .................... 1.50
O u td o o r E n d u ra n c e M o n o p la n e , A .M .L .A .
K it No. : .................... 2.00
S P E C IA L L O W P R IC E S O N C O M P L E T E
L I S T O F B A L S A S IZ E S .
Size ^ Q u a n tity P ric e
.................... 1 .............. .................... $.10
l / 2 0 ” x 2 " . .................... 1 .............. ...........................10
1 /1 6 " x 2 " ................... 1 .............. ...........................10
l / 1 6 ” x l / 1 6 " ................ 3 .............. ...........................05
I / 1 6 ” x 1 /8 " ......... 3 ........................................... 05
l/I 6 " x l/4 "
l / 8 " x l / 8 " . .................. 3 .............. ...........................05
1 /8 -.X 3/16" 9 ...........................05
l / 8 ”x l/4 " , . 2 .......................................... 05
1/ S ” x 3 /8 ’' , . . . . 1 .............. ...........................03
................ 1 ..............
3 / 1 6 " x l / 4 " .................. 1 .............. ...........................03
3 /1 6 " x 3 / 8 " ... 1 .............. .......................... 03
l/4 " x l/4 " ..................... 2 ..............
R u b b e r o n e -h a lf c e n t a fo o t o r 65c fo r a 210
ft. s k e in .
A ll orders fo r wootl m ust include u 10c packing
charge. N o orders fo r under 50c accepted. No
stam ps. S e n d m oney order. W e give a 12 hour s h ip
ping service, the fastest in the country. T r y us.
Southern M odel A irplane

Supply Co.
P . O . Box 149 A tla n ta , G e o rg ia
B u ilt of f in e s t w ood, 14 in ch e s lo n » , B r ig h t C o lo rs, mixed xvliile the ship is being rigged, whose legs were, of course, free, held
flics 500 fee t, lo o p s th e loop, s p ir a ls an d flies r ig h t
back to you. Sem i 25 c e n ts fo r o n e o r S I .25 fo r six .
so that, for example, a forward move the glider with his arms, and ran
(C oin o r m o n ey o r d e r o n ly .) G iv e n — B ird C all t h a t ment of the stick moves the elevators until flying speed was reached, and
w ill I m ita te B ird s g iv en w ith E ach F ly e r.
$ 1.00 in C a n a d a w i t h E x t r a . up, instead of down. the glider rose from the ground of
N o v e lty S u p p ly H o u s e Getting Ready for the Take-Off. its own accord. Frequently, even
J a m e s t o w n , N. Y.
When you get into the seat, fasten now, gliders are taken oil' by a crew
the safety belt around you. The of men who pull the glider down hill
safety belt is a strap, buckling by means of a hemp rope.
Model B uilders Specials around your waist, which holds you This method is, however, a com
C o lo red D o p e , A n y C o lo r. 2 O z. C a n ___________ S.20 to the glider. You may he grateful paratively unsatisfactory one, since
J a p T is su e 2 0 " x 2 4 " , p e r s h e e t _____________ .04
C h a m p io n s h ip R u b b e r Ys” 210 F t . S k e in ____ .85 for this belt if you hit an air the glider is apt to be damaged by
Send 2 c t. S ta m p for B a rg a in P ric e L is t. Q u ick “bump”, or make a poor landing. being dragged along tile ground for
S ervice. Q u a lity M a te r ia l.
Feel for a rope which should be too long a period. I t not only is a
P A C IF IC M O D E L A IR C R A F T S U P P L Y
6303 S o . B r o a d w a y Loa A n g e le s , C a l if .
attached to the under-wing surface strain on the glider to pull it along
above you. (American ships are not the ground too far, but. also the pilot
always equipped with this rope, but has difficulty in handling the plane
most German ships have it). Hold before it gets into the air.
L O C K H E E D K ITS on io this rope with your left hand
(the right hand grasps the stick)
A N D PARTS while taking off. In this way, your
V e g a a n d S iriu s M o d els
P a n ts c o v e re d w h e e ls —60c p a ir. S en d 10c for
body will assume a position perpen
m o u n te d ta il s k id w heel a n d p ric e l is t o f p a r ts
and k its .
dicular to llie ground, and you will
H I L L - T O P M O D E L A IR C R A F T CO .
be instantly aware whenever one
2553 R ing P la c e . P ric e H ill. C in c in n a ti. O hio wing dips down.
EFORE taking off, choose some
B object on the horizon right in
front of you. By keeping your eye
fixed on this object, you will be able
to maintain flight in the course
which you have planned.
When you are ready to start, hold
both rudder bar and stick in neutral.
When you have had some experience
you may find it practicable to pull
the stick back a very little. This will
raise the elevators slightly, ready
for the climb. Much, depends on the
E n terta in in g P u zz les Y ou W il l E n ]oy! individual glider which you are
S c e n e * f ro m t h e M o v ies in b e a u tif u l c o lo rs . F o u r (4) P u z z le s
in th e b o x . m o u n te d o n v e r y h e a v y b o a r d , siz e 10x15 in c h e s
flying.
B u y f r o m y o u r l o c a l d e a le r s . I f n o t i n £ Methods of Taking Off. There are
s to c k , o r d e r d ir e c t fr o m u s . W e p a y ^ at. least four different ways in which Γιο. 4
p o s ta g e . In tro d u c to ry P ric o
a glider can lake off: T H E CATAPULT M ETH O D O F T A K E -O F F
The crew s stretch the elastic cable b y running for tvar a
• W ild e r M a n u f a c t u i m q C o m p a n y The oldest method is by running w ith it, while one or tw o others hold the tail to prerent o
prem a tu re take off. When the cables are sufficiently tight a
down hill. All hang gliders were signal is giren a n d the tail crew lets gc with the resulr that the
gider shoots into the am
taken off in this manner; the pilot,
November, 1930 JUNIOR MECHANICS AND MODEL A I R P L A N E NEWS
A second method of taking off, and

one which is being· used more and
more extensively for training, is that
of towing the glider behind an auto
mobile or motor boat. The glider is
attached to the towing machine by a
rope with a length of perhaps* two
hundred feet. As the pilot becomes
more experienced, the rope may be
lengthened to live hundred feet or
more. The automobile, or motor boat,
gathers speed rapidly in order to get
the glider off the ground as soon as

possible. As soon as the glider gains
sufficient forward speed, (evidenced Made by Kia^sburv
by tendency of the glider to rise by
itself) the pilot pulls the stick back especially for
gently. This brings the plane into
the air. When it has taken off, the
Obtainable
towing machine should continue to no where
travel fast, in order to continue the
glider’s “thrust” as long as possible. H EWRasp E ’S th c ^ n e w While
m ade especially
If the glider is going so slowly for us by K ingsbury—
that it is forced to remain very near w orld's leading m ak er of
model planes. R esult of
the ground for some time, the tow m o n th s of experim enting.
rope will drag and lliglit will be Rises off ground— will not
nose-dive, stall or spin. P o sitiv e ly th e
very uneven. When sufficient alti slickest plane you ever saw an d will o u t
tude has been reached, the tow-rope perfo rm m ost planes costing several
tim es as m uch. Several b ra n d new fea
is released by a manual control and tu res w hich insure suprem e perform
the pilot flies independently. This ance. N o t a co n stru ctio n set— a ready-to-
fly plane. 30 seconds a fte r postm an de
method of take-off should be at- livers y our plane you can send it in to air,
b anking, zoom ing, rising over housetops.
Look a t these pictures!
FI Guarantee cl.
We positively guarantee the
W hite W a spto fly and to satisfy ■
you in every way. This plane will s ty
create a positive sensation every
where. Every boy in town will
envy you. Yet you may have it
A GRAND BOYS
FREE. M A G A Z IN E
The Open Road fo r B oys M agazine is a
fifty page, m onthly magazine crammed
w ith thrilling, breath-taking stories of
high adventure, aviation, deep m ystery
and suspense. 200,000 readers. Regu
lar subscription price to Open Road for
B oys M agazine alone is SI.00 a year.
Fill out and send the coupon below,
with $1.00 and we'll send you The
Open Road fo r B oys M agazine for one
year and we’ll rush a W hite W asp Plane
to you F R E E of all charge. This is a
great offer. Send coupon today.
tempted bp the student pitot only

under the direction of a competent U SE SPECIAL· COUPON
instructor.
Experiments have recently been
made in which gliders have been Pilot Piller—Open Road for Boys
towed behind airplanes. The proce 130 Newbury St., Boston, Mass.
F rie n d P ilo t: G o sh , yes! H e re 's m y d o lla r. P u t m e d o w n fo r a whole
dure here is, in general, the same as y e a r for Often R oad fo r B o ys M a g a zin e a n d ru sh m e a W hite W a sp P lane
when the automobile does the tow im m e d ia te ly .
N a m e ________________________________________________________________________
ing, but it is far more intricate. S tre e t & N u m b e r ___________________________________________________________
The airplane’s speed is of necessity C ity o r T o w n __________________________________________ S t a te _______________
very high, so that it is an unusually
difficult task to pilot the glider. This,
greater speed, thus increasing the

Easy, Q u ic k Wa; glider’s speed. The crew may start
to run when the cable is stretched to
To Get Into about 150 percent of its length and
turn loose when it is stretched to its
capacity, (about 200 percent of its
original length).
Sometimes the man, or men, at
the tail are not used. The glider's
own weight will hold it; still until the
of course, should be attempted by shock cord has been stretched consid
only the most experienced pilots. erably.
“ I W ill T ra in Several precautions must be taken
The Shock Cord Method of Taking
You AT HO M E Off. The usual, and in most cases, the when this method of taking off is
M a jo r R ockw ell” most practicable method of take- used: In the first place, the ground
M y new p r a c tic a l, a m a z in g H o m e S tu d y C o u rs e p r e off is one in which the glider is cata crew carrying the rubber cable must
p a re s vou q u ic k ly to till a n y of th e fa s c in a tin g A v ia
tio n jo b s, e ith e r o n th e g ro u n d o r a s a s k ille d (Iyer, pulted into the air by means of an walk ahead so that the cord will
p a y in g $50 to $150 a w e e k . 1 t r a in y o u to su cceed
q u ick ly , to fill o n e of th e th o u s a n d s of a ir and elastic cable. This works in exactly
g ro u n d jo b s now op en a n d I h e lp y o u to find y o u r
r ig h t p lace in A v ia tio n .
the same manner as a sling-shot,
I’ll Help You Get Your Job backward, where a rubber cord is stretched
L e a rn a t h o m e in y o u r s p a r e h o u rs. In 12 s h o rt then released, shooting a
w e e k s y o u can be re a d y to t a k e y o u r fly in g in s t r u c
tio n s a t g re clly re d u c 'd rules a t a n y a ir p o r t n e a r missile into the air.
y o u r h o m e, o r r ig h t h e re in D a y to n .
s te p in to a n y a v ia tio n g ro u n d jo b w ith m y hell).
O r y o u can The elastic cable consists of num
E x p e rie n c e o r a d v a n c e d e d u c a tio n n o t n e c e s s a ry .
A v ia tio n - th e f a s te s t g ro w in g in d u s tr y is c a llin g y o u I
erous strands of rubber held to
Y ou r is k n o th in g . If y o u a re n o t s a tis fie d a f te r gether by a braided covering. It
c o m p le tin g m y c o u rs e I’ll re fu n d y o u r tu itio n , 'l a k e
t h e f ir s t s te p by m a ilin g co u p o n N O W fo r m y big should be from eighty to two hun
F R E E H ook and T u itio n o ffe r. dred feet long. At the center of it
M AJOR R. L . R O C K W ELL y ” 7“ 7. ~~i
D a y to n S chool of A v ia tio n S ΛΊ-·ϊίοι- R . L . R o ck -
D e sk Y -25. D a y to n . O h \ n y , w e 1 D a y to n S ch o o l |
a metal ring is attached. This ring
• • .( I r. ^
A v ia tio n . D e sk Y -25.
D a y to n , O hio.
slips over an inverted hook on the
Fnr V ii n ^ L · y ^ O e a r M a jo r: P le a s e r u s h m y ’ nose of the glider, so that unless the
FR EE!
B k
S
✓ copy of F R E E B O O K on a m a z - I
i n s e a s y w ay to g e t in to A v ia tio n . cord is taut the ring falls off the
S N a m e ............................. ....................................... | hook. (See Figure Fach end
y ^ A d d re s s of the
X T o w n ......... . . .S ta t e .................... A g e . . . . j from two to six men. These men
cable is held by a crew of
walk out ahead of the glider, carry
MODEL AEROPLANE SUPPLIES ing the cable forward so that it
Send 5c for bundle of Balsa and Price List at the aship's forms Y, with the point of the V
nose. (See Figure 4.)
on Supplies.
A ER O S H O P , 3050 H u rlb u t A ve., D e tro it, M ich. The glider is usually held stationary
by one man who sits on tlie ground
and holds (he tail, or by several men
who hold a rope attached to the tail.
form a perfect V, i. e., so that the bi
TIF instructor holds one wing of sector of the angle of the Y will be
T the plane to preserve lateral bal directly in line with the fuselage and
ance, and, at the same time, gives inthe glider’s patli of flight. If one
structions to the ground crew. At end of the rubber cable is carried too
the command “Walk!”, the crew on far to one side, the tail of the glider
the rubber cable takes about, ten will be swung about during the take
N o th in g else like it. R egis
t e r s w here it h its th e ta rg e t.
steps ahead. Then, at the command, off, and the ship will not start out
A b s o lu te ly h arm less. Looks
lik e a real g u n .Im p ro v e y o u r
“Ιίιιη!’', the crew runs ahead another along its intended path of flight. In
m a rk sm a n sh ip — ind o o rs or
o u t. P rice S I.00. If y o u r
ten paces. Next, the instructor order that the ground crew may
d e a le r c a n ’t s u p p ly you shouts, “Turn loose!” and the men at stretch the cord to form a perfect V,
w rite : D e c k s M fg. C o. Inc..
1 2 4 F e d e ra lS t- C a m d e n N .J . the tail go, allowing the glider to it is a good idea to mark places on
THE HARMLESS SHOOT1NC CAME
be shot into the air. The elastic cord the ground toward which they must
becomes slack, the ring falls to the run. (See Figure 5).
OREOYER, after the command,
“Turn loose!”, has been given,
" A v i a t i o n E n t h u s i a s t s 11 the men carrying the cable should
duck away from the glider's path, so
that the plane will not hit the men if
the take-off is poor. Sometimes the
ring does not fall off the hook imme
M ODEL CLUB PINS diately. In this event it. is necessary
M a d e in S i lv e r o r G o l d F r o n t $6.00 P e r D o z . for the pilot to push the stick for
A n y L e t t e r C a n Be A p p l i e d t o P i n t o
C o n fo rm w ith C lub N am e. ward, dropping the nose for a mo
ment, and then to pull the stick back
again. The ring usually drops off
without further difficult}". An ex
M AK ERS OF PINS FOR
A M E R IC A N S K Y C A D E T S AND
perienced pilot can tell when the
N. Y. G R A P H I C J . A . C . hook drops off from the action of the
ship.
ground, and the starting crew stops Some automatic launching devices
running. have been experimented with, but
All S o r t · MEDALS All S p o r t ·
Tn a low wind, this method of take they are still experimental.
S C H O O L — CLASS AN D FR A TER N ITY PINS
off will launch the glider at a speed Conclusion. A take-off is not a dif
JO H N SO N CO. of about fifteen miles an hour. When ficult, feat, but the success of the en
352 VV. 1 3 t h S t . “ W i n g B u i l d i n g " N e w Y o r k , N. Y.
the pilot becomes more expert the tire flight depends to a great extent
W rite For C atalog “ G ” ground crew may he enlarged and upon its proper execution. The stu
may run ahead farther and at a dent should have a well-trained
November, 1930 JUNIOR MECHANICS AND MODEL A I RP L A N E NEWS 51
ground crew, and should himself he

thoroughly acquainted with (he prin
ciples of the take-οίΓ, before he at
tempts his lii*st glide.
Four Things to Remember about
the Take-Off:
1. Take off into the wind.
Official
2. Be sure your course is free from Fig . J
obstacles.
3. Keep the stick in neutral dur
ing the take-off.
4. The first flight is never so start
g/ic/er
The r in g a n d hook w hich connect
the elastic cable to the nose o f the
/Is tong as the cable is ta u t the

Boy Scout
r in g sta y s on The hook
ling as you expect. Keep cool!
A Scale Model of a Curtiss "Condor"

Models
(Continued from page 1?>)
Cut to shape and finish off as shown small wheel taken from a toy auto
in the drawings. There are twelve mobile will be just the right size. .
exhaust pipes on each side of a
motor. These can be imitated with PROPS
small pins. The cockpits for the
gunners are drilled out carefully and The props are made with either
rings glued around them as shown in two or three blades, as preferred.
the drawings. Shape out two bullet heads or spin
HE BEAUTY and per
Be careful to note that the radia ners.. Drill the amount of holes for
tor on the right engine is off-center the blade and insert.
to the right; and the left radiator blade so that the props will turn
Twist
clockwise, as on the Conqueror en
the formance of SILVER T
off-center to the left. ACE Flying Models and
The radiators are shaped from gine as used on the Condor. Now in
small blocks of wood, streamlined sert. a pin through the spinner and . Kits has now won the
and grooved according to the plans. make the hole larger, so that the
The two small wings are glued to props will spin more easily. exclusive honor of furnish
the fuselage first and given plenty of ing a new series of official
time to dry. The two side motors are PAINTING
glued on next. After being perma kits for the largest or
nently set, the other two lower halves For your color use lacquer as this
are attached. Refer to the drawings is quick drying and gives a very ganization of boys in the
when doing this. The top wing is good appearance. You will need me
glued on next and is held on securely dium yellow, olive drab and a small world—and retailing from
by the cabane struts which are of amount of red, white, blue, black and
bamboo sticks. Push the top wing in silver. The wings are painted yel 50c t o . $3. Send 5c for
the sticks to get a firm hold. Now low. Give two coats if necessary. complete catalog of every
glue it and see that the wing is per The tail, elevator, stabilizer and ver
fectly level. The radiators are glued tical fins are painted yellow. The thing for best model
in just above the motors. Bamboo fuselage is olive drab; so are the
sticks cut to the proper length are motors, radiators, struts and land building.
used for struts. Mark off their ing gear.
proper place and glue securely. The grooves in the radiators are
painted silver as shown in the draw
TAIL ASSEMBLY ings, propeller blades are silver and
the spinners olive drab. The rudder
er o A odel M Co.
The tail group should be assem is marked and painted red and white. D e p t . M A -9
bled next. Big up the tail assembly There'are seven red stripes and six U I N o rth W acker Drive
as shown in the drawings. Bamboo white stripes on this. Blue is painted 1 CHI CAGO 1
is used for the elevator struts, glued, on the balanced portion of the rudder.
and set perfectly straight. The centers of the wheels are olive
The landing gear is the next step. drab, the tires black. The landing
A pair of 1 1/8" wheels will be lights made from the plans are
needed. Balsa or white pine is used painted olive drab with white and
for the shock-absorbers. Bamboo is black rings in front. The stars can Factory to R id er
used for the struts. The wheels are be bought and pasted on or painted. A select Save $10 to $23 on the Mead Bicyclo you
from 4 4 S ty les, colors and sizes.
situated directly under the side “V. S. ARMY” is painted in black, D ays’ Free T ria l
motors. The tail wheel assembly is 1/4" width letters, under the lower a fte r tria l Wo ship on approval.If not satisfied
re tu rn the b ic y c le . E A S Y PA Y
made as shown in the drawing. A wings. This completes the model. M E N TS . $5 down on RANGER Bicycles.
.wheels, equipment at hoi f us-
I uni prices. Write for marvelous new
* prices .wonderful 30 day trial ofTernndterms.
X f h a r i Cyclc Company
r l v d u iDcpt.KUoChicago
Plagiarism
Stories h a v e been su b m itte d to M o d e l A i r p l a n e N e w s w hich are copies of
C U R T IS S C O N O U N 1 ! !
stories t h a t h a v e a p p e a re d in o th e r m agazines. C o n stru c tio n aet w m e as pub lish ed in th is ímuc w ith nil necessary
material«· to b u ild a nolid reale m odel ol th e C u rti-a C ondor. C o n
A nyone su b m ittin g a plagiarized sto ry th ro u g h th e m ail and receiving an d ac stru c tio n a c t.....................................................................................................$2.'J5
„ . SUPER M ARIN E-N APIER
cepting re m u n e ra tio n th ere fo r is g u ilty o f a F ed eral offense in using th e m ails to F ly in g scale m od-l of th e S u p erm arinc-N apio r i* nn exact replica
of th e original atrplnnc w hich won the last S chneider cu p races.
defraud. C o n stru c tio n o u tfit w ith all necessary material.*· an d large full eiie
T h e p ublishers o f M O D E L A IR P L A N E N e w s are anxious— as are all re p u ta b le blueprint«« w ith co m p lete in stru ctio n s how to b u ild ................$2.95
Ι/arge F u ll S ite B lu ep rin ts S e p a ra te ly .......................................................75
publishers— to sta m p o u t th is form o f th e ft and p irac y and arc advising all m a g a .............................. FOKKEN D7
F ly in g seal«' m odel of th e F o k k e r D -7 w hich wns iisftl b y Baron Von
zines from w hich such stories h a v e been copied of such plagiarism and are offering R ic h th o fe n 's Hying sq u ad ro n d u rin g th e W orld W ar. C onstruction
S et w ith Full Six·· l’lnns..................................................... $4.25
to co o p erate w ith th e p u b lish ers th e re o f to p u n ish th e g u ilty p e rso n s. Large F u ll Sixe B lu e p rin ts S e p a ra te ly ......................................................75
E x tra o rd in a ry C atalog and P rire L is t....................................................15
N o tice is h e reb y given to all w ho h a v e s u b m itte d o r w ho su b m it sto ries t h a t th e A dd 35c e x tra for IN S U R A N C E and PA C K IN G in C R U S H -
P R O O F B O X E S . A dd 10c ex tra for P A C K IN G a n d PO ST A G E
sam e m u st be O R IG IN A L . w hen ordering p la n t only.
M ETROPOLITAN MODEL AIRCRAFT
2 0 7 7 East 24 Street____________________ Brooklyn. N. Y.
52 J u n i o r M e c h a n i c s a n d M o d e l a i r p l a n e N e w s
B1LD-0-PLANE From the Ground Up

(Continued from page S)
to the field. On and on they came, his young body, he jammed down on
each ship keeping its place as the rudder bar, and at the same time
though held there by invisible Hung the stick hard over. The mono
strings. Like a covey of thunder plane groaned protestingly. For a
ing hawks they Hew by him, the moment she seemed to hesitate. Then
whole formation dipping in salute as she swung over. She skidded badly,
they passed. Larry dropped his then thrust her nose toward the
plane’s hose in answer. A flaming hangar. Her tail came suddenly up,
red rocket leaped to a scarlet light, and her spinning prop fouled a rope
as the Major fired from a Very pistol that had been lying on the tarmac.
the signal to return. The rope twiiied about the prop
These easy co n stru ctio n o u tfits, which are
The Major, at the apex of the X, blades like a twining snake lying in
in stru c tiv e as well as a m u sin g , enable you to executed a swift Immelmann turn, ambush. Her nose burrowed deep
assem ble a re a listic scale model of th is fam ous
D H 4B. w ar tim e A rm y Bom ber. Com plete
which left him Hying in the opposite into the earth. There was a sicken
even to hand-carved 3-inch wooden propcllor. direction at higher altitude. The ing splintering of wood, as the un
Sent postp aid in s tro n g m ailing tube for one
dollar.
remainder of llie escort banked at dercarriage cracked beneath the
B IL D -O -P L A N E . top speed and dangerous angles, and strain that was put on her. Larry
M o n ro e M o d e l A ir c r a f t,
a moment later the entire fleet was was conscious of a terrific blow in
1718 H a r r i s o n S t . , returning to the tarmac in formation. his chest, as he was thrown up
E v a n s t o n , 111. Above them and slightly behind the against the controls. The grating
X a n te .. . Major’s biplane flew Larry, his hands shriek of ripped fabric came to bis
steady and firm on the controls and ears. Then came a dull cracking thud,
A ddress. and the stricken ship stopped dead
a proud smile playing on his lips.
on the tarmac it had left in intact
P r in t Y o u r O w n HE familiar, ugly bulk of the condition less than an hour ago.
C a rd s, S ta tio n e ry , C ircu la rs, A d v e rtis in g , e tc .
S av e m oney. P r in t f o r o th e r s ,b ig p ro fit. J u n io r
P re ss , $5.90. Jo b p r c s s S ll u p . P o w e r $149. E asy
ru le s * ent. W rite f o r fre e c a ta lo g w ith a ll d e
ta ils. T h o KEL SEY Co ..Y -β 1, Mo rld on , Conn.
T hangars hove suddenly into view. A moment later Larry emerged
The Major’s ship detached herselffrom the wreck. Blood streamed
from the formation, and shooting down his face, and he was aware of
downward, achieved a graceful land a sharp, paralyzing pain in his knee.
A V IA T IO N ing. One by one the other planes fol As he reeled across the field, he saw
I n fo r m a t io n F R E E lowed suit. Larry idly Hew in circles, Ileinze spring from the cockpit and
b e n d u r y o u r n a m e a n d a d d re s s for full in f o r m a t io n giving the others time to land. As regard the wrecked mono with a sar
reg a rd in g t h e A viation a n d A irp la n e b u sin e ss. F in d
o u t a b o u t th e m an y great o p p o rtu n itie s now open his ej’es swept the sky he suddenly donic expression.
a n d h o w we p r e p a r e you a t h o m e , d u r in g sp a re
tim e , to q u a lify . O ur new book “ O p p o rtu n itie s realized that there was only one ‘•You’re a swell flyer,” he said, and
i n t h e A i r p l a n o I n d u s t r y " a l s o s e n t f re o if y o u
answ er a t once.
other ship in the air in addition to his voice held a mocking note. “I
A M E R IC A N S C H O O L OF A V IA T IO N his own. That ship he recognized wouldn’t have come within a yard of
Dept. 3158 3601 Michigan Avc., CH ICA GO immediately as ITeinze’s. To Iiis sur you. Well, if a pilot’s yellow, it
prise the latter made no indication comes out in a landing.”
Model Aircra£ters of following the other ships down.
Larry swung his rudder over and ARRY suddenly saw red. With a
S P E C IA L O FF E R -*
1-1 / 1 6 " X 6 " X 3 6 " P a is a ___________ S
1 1 / 8 " X ft" X 3ft" P a is a ____________
1 1" X 6 " X 3 6 " P a i s a ..............................
10 S h e e ts J a p . T issu e a t 5 c ________
.40~]
.45
.80
.50
Sent
P o st-
passed close to the other plane, which
was flying aimlessly back and forth L cry of rage, he flung himself upon
the other. Ileinze’s little yellow eyes
over the field. He shot a questioning flamed witli hate as he advanced to
1 2 10' sk ein 1 / 8 " Mat r u b b e r _______ Paid
.95 | $2.75 look at the saturnine face of Ileinze meet Larry’s onslaught. For a mo
T o ta l V a lu e ......................................... S 3.10J as they passed. The latter pointed ment they grappled, two pair of
—O T H E R V A L U E S - downward meaningly. Larry nodded, hands seeking a hold. Then Larry
G u a ra n te e d C olorless o r C o lo red A m b ro id $ .2.8 2 oz.
B a n a n a O il______________________________ .15 2 oz.
taking it as a signal for him to land. heard the Major’s crisp tones.
1 /1Ö " b rass w a s h e r s . . . . ____- ___________ .10 d o z. Down went the ship, closer and “Take those men apart.”
In d o o r W in d e rs --------------------------------------- .35 c a .
O rd e rs o v e r S1.00 se n t p o s tp a id ; o rd e rs S I .00 or closer to the sandy soil below. Then, Strong hands separated them, and
o v e r s e n t p o s tp a id .
R iv e r a d d 15c e x tra .
O rd e rs w est of th e M ississip p i
when it seemed as if a nose dive was Larry looked up into the angry eyes
EDWARD CUTH inevitable, he jerked back on the of Riddle.
M odel A irp lan e S upplies
304 M i l d r e d Av e. , S y r a c u s e , N. Y. controls. She flattened out perfectly, “Larry, go to the first aid room,
—Send for price list— and came out of it almost parallel and get yourself fixed up. Ileinze,
to the ground. For a second she you’re grounded until further orders.
skimmed along, her wheels almost Furthermore I’ll see you in my ollice
U.S. MODEL AIRCRAFT CORF. touching the ground. He settled back in half an hour.”
and waited for the moment when Ileinze glared at him, his eyes
E st. 1 9 0 9
his landing gear would scrape the twin pools of distended hate. He
earth. Then it happened. opened his mouth as though to speak,
O ut There was a sudden roaring behind but evidently thought better of it. lie
him. He turned quickly to see the turned on iris heel, and strode off
ship of Ileinze, descending like some across the field. Dully, Larry made
predatory hawk in search of prey, his way to the small room at the
T h e M odels to W in your C ontest lie was landing, his speed greater back of the office, where a makeshift
C U R T ISS F A L C O N M IL IT A R Y O B SE R V A
T IO N B IP L A N E , Sp an 2 2 ^ inches. W eig h t
than Larry’s, and as his ship tore field hospital had been installed for
ly i oz. C o n stru ctio n K it w ith full size along the ground behind Larry, it use in cases of emergency.
draw ing and B uilding in stru c tio n s. Price-
P o st Paid ......................................................... 53.25
was inevitable that their wings
B A R L IN G N . B. No. 3 W orld Record H old would tangle unless the monoplane The strings behind the curtain
e r Low W in g M onoplane. 24 in. span.
C onstruction _ K it w ith full size D raw ing
was thrown oil’ her course. manipulate the figures in this
and In stru c tio n s. P rice P o st P a id ........$3.25 Larry wasted no time in trying to strange drama more blindly than
V ariable P itch All A lum inum Propeller
P a te n te d , 9" ................................................ $1.50
determine this madman’s motive. No jever, and to trhat purpose? Is
G raf Zeppelin C o nstruction K it Ss'A inches matter what, it was the Major’s par Ileinze the guiding hand or is lie but
................................................................................. S7.50
B c l la n c a C o n s t r u c t i o n S et ...................................$9.00
amount ruling that a life must never a tool in more sinister hands?
I'olcker C on stru ctio n S et ............................... $8.50 be endangered. If a plane must The tempo increases and the con
56 Page C atalo g illu s tra tin g 24 additional fly
ing and E xhibition M odels and com plete line
crack—well, it could be replaced, but clusion draws near. Follow it to the
of Model S upplies; send 10 cents for copy. a human life cannot be reclaimed. thrilling end in the December issue.
U . S. M O D E L A IR C R A F T C O R P O R A T IO N With this in mind, Larry did not On sale at all news stands November
397-99M B r i d g e S t r e e t , B ro o k ly n , N . Y .
hesitate. With all the strength in 23, and ontg 13 cents a copy.
November, 1930 J u n i o r M e c h a n i c s a n d M o d e l A i r p l a n e N e w s
Whittling for Fun

(Continued from page 3(>) A IR PL A N E
A IR SEA L
BALSA
W hen you build your own models in
sist on A ir Seal B alsa.
A ir Seal B alsa W ood m ay be obtained
from A irplane M odel H ouses in all sec
tions of the c ountry.
C ultivated, selected and K iln D ried.
W eig h t 7 to 11 pounds p er cubic foot.
O ur B alsa is used in the construction
of m any of th e la rg e com m ercial planes,
also th ro u g h o u t the co u n try by model
clubs, schools and colleges. The very
6 b est g ra d e of c u t sizes m ay be had in
q u a n titie s.
hole so that you can get the knife- You will add to tlie appearance of W e have m ade a study of model work
blade through and cut the frame the picture frame if you stain it with and can a ssu re en tire satisfaction a s to
down to shape. Take pains not to a light antique stain, and then shel q u ality.
run over the edge of the line y o u lac and wax it. This finish goes P R IC E S ON S A M P L E SIZ E S
drew, for mistakes here cannot be with the style of hand-carving. Including P o sta g e
rectified or hidden. By the time you have finished the 36" long 6" w ide 3" thick $1.65
Drawing 7 shows you both the di picture-frame, a hundred other ob 36" long 6" wide 2" thick 1.15
jects for the home, the work-shop, 36"
36"
long
long
6" wide
w ide
1"
Zi"
thick
thick
.75
.70
and the desk will suggest themselves. 36" long 6" wide Ζλ " thick .60
Remember to lay out a design or 36"
36"
long
long
f " wide
6" wide
Zi"
1/16"
thick
thick
.55
.50
drawing of any object you make, so 36" long 4" wide 1" thick .60
that all dimensions check up and are 36" long 3" wide 3" th ick .35
clearly before you when you start to W rite for Free Booklet on Model
whittle. Construction.
Keep your knife sharp and your
dimensions true, and before long T h e F le is c h m a n n
you may successfully turn out
a foot-long wooden chain or a ball T r a n s p o r ta tio n Co*
within a cube to astonish your B alsa W ood Sales D ivision
701 W ash in g to n S t., N . Y . C.
friends. Best of all, the accuracy of 327 So. L a S alle S t., C hicago, III.
hand and eye gained in whittling 245—11th S t., San F rancisco, Cal.
will be of Uie greatest value to you
in any other handicraft work you
may take up in the future.
“ CITY o f
WHAT YOU NEED CHICAGO”
Tools and materials necessary to “ C ity of C hicago’’ W orld’s
D u ratio n P lane 30" P lan 20c.
make the objects mentioned in this Bobe-Ott Air notors_ Complete S2.75. Knock
article are as follows: down SI.65. 30" airtnnk ready to mount
motor $3.75. M O D E L A V IA T O R , 60S W a s h
Scraps of pine, gum, and maple in g to n , D e p t. M A , C h icag o , III.
lumber of varying thicknesses; one
or more good Swedish steel whittling
knives, try-square, brad-awl or drill,
screw-eyes and hooks, nails and
mensions of the frame and how to brads, string, pencil, etc.; piece of
draw the ellipse. When the whittling thin glass and cardboard.
is done smoothly, mount a piece of
thin plate glass of about seven and a
half inches by five and a half inches
on the back, against which rests a
piece of cardboard, on which is
pasted the picture you want to use in
the frame, as shown in plate 8. Bent
brads or small nails will hold the M ystery Ship!
glass and cardboard in place, since T h e b eau tifu l. large 39-inch low w ine flying scale m odel is a real
flyer— 90 seconds tb 2 m inutes d u ra tio n — very sta b le an d easy
*_ n .. D..H . ------ » tn d p r |n t(() in stru rtio n s, N . A. C. A.
they do not show from the front, or p, in stru m e n t b o ard in cock-pit, de-
. wing. tail, cowling, an d rear hook.
you may use bent bits of triangular _ are supposed to fly— b u t how? This
one is a r e a l p e r f o r m e r ! C om plete easy-to-build kit, everything
metal such as are put in window needed. Postpaid No. NX -15. a bargain a t only 33.95.
frames to hold the glass firm. P io n e e r’s N ew Book

“M odel B u ild er’s G uide”
A h a n d book for th e ad vanced m odel b u ild er wishing to design
h is own m odels w ith o u t m aking b a d m ista k e 1·. T a b le s for figur
ing d u ra tio n , tu rn s in ru b b er, propeller block site*. etc ., and
th e fine pointa on dcriguing an d flying m odels for d u ra tio n .
Christm as G ift Suggestions to Ju n io r M echanics P o stpaid. 35c.
5c B rin g s N ew C a ta lo g
N ew catalog ju st o u t show ing com plete su p plies, k its, valu ab le
F o r m o th e r— a s e w in g b a s k e t, h a n d y for th re a d , needles, an d th e usual odds h in ts for th e m odel builder, well illu stra te d . Show s w orld's
record model··. A sk for C atalo g M . 5c.
and ends— a s h o e s a n d s t o c k in g s b o x to keep shoes a n d stockings in th e ir proper
N ew 11 M in u te I n d o o r T r a c to r
shape in th e ir p ro p e r places. C om plete k it for th is record breaking indoor model, all w ire p a rts
form ed, all wood c u t to siie. ev ery th in g t h a t's needed co m p lete.
F o r fa th e r— a s m o k i n g s t a n d , trim -lo o k in g . T h e re are n ever too m an y o f them P o stp aid , 35c.
in th e hom e— a l a r m c lo c k c o v e r, a clever sta n d to house an a la rm clock. T h e S p e c ia ls T h is M o n th
1x3x40 balsa. 60c. celluloid p a n ts 3 H inch per pr.. 50c. Sikorsky
article, C h r i s t m a s g i f t s f r o m t h e H o m e W o r k s h o p , in th e D ecem ber issue of 24“ scale b lue p rin t. 20c, 60 tt. 1 /3" ru b b er. 35c. A dd 10c to
J u n io r M e c h a n ic s a n d M o d e l A i r p l a n e N e w s tells you how. a n y o rd er un d er $1.00.
On all new s sta n d s N o v e m b er 23, a n d only 15 cents a copy! PIONEER MODEL AIRPLANE CO.
C h a m p a ig n , Illin o is
54 J u n i o r M e c h a n i c s a n d M o d e l A i r p l a n e N e w s
Δ C o u r s e in A i r p l a n e D e s i g n i n g
( Continued from ixujc 12)
bend it now, isn’t it? Then why not can be made tapered, even though
turn our wing spur on edge, too, so the wing is the same thickness all
that it cum withstand more load? along. I t is also quite true that
With it placed on edge, so that it can many successful models and larger
stand more load, why can’t we cut airplanes, too, have been built that
Complete it down until it is still strong did not use a tapered wing spar con
•With "Rules enough, but much lighter? We can. struction, but, all the same, model
Score Cards & It is a well known fact that a airplane builders can save a little
\Playinj) Uitld beam is stronger when placed on weight by tapering their wing spars.
M ail O r d e r D ir e c t i f Y o u r D ealer C a n n o t S u p p l y Y o u edge, with the loads acting parallel In the building of full size ships
PSY CH IC BASEBALL CORP. to its longer dimension. If a wing there are often other matters that
D e p t. J . M . 389 F I F T H A V E ., N . Y . C . spar, placed Hat, must lie a half inch make tapered spars impractical, un
wide by a quarter thick to stand a less the wings themselves are to be
certain load, we can place it on edge, tapered. It is interesting to note the
cut it down quite a bit, and it will present tendency toward the tapered
still be strong enough to stand that wing, which of course includes the
load! Within practical limits, we tapered wing spar.
B e tte r M oulds T h a n H ns B een, m oulds ns low as $1.50 each. T o C a st
Le.id Soldiers, In d ian s, ilu n tr r e . W ild nnd F arm A nim al·. W onderful
can save a lot of weight in our model
09C " T ru e T o Life M odels.” E asy an d inexpensive to m ake. I airplanes by doing just this thing. Ν important matter in connec
Λ
fu rn ish all n e c e w iry m a terial including E nam el. Send 5o
S tam p for I llu s tra te d C atalogue.
D SCHIERCKE, 1 034-72nrt Street, BROOKLYN, N. Y.
How can we tell what size to tion with stress analysis is the
make our wing spar? That is some factor of safety. Suppose we built a
B O YS and GIRLS thing that the model builder will ship with the wing spars just strong
have to learn by experience. There enough for normal Sight and no
Earn Xmas Money is a method of doing this, but it stronger. Then, if the ship were to
is too involved for use here. The be suddenly leveled out of a dive or
W rite for 50 sets S t. N icholas C h ristm as Seals.
Sell for 10c a set. W h en sold send us $3.00 best thing to do is to copy spar sizes if the wing were to be accidentally
and you keep $2.00. No w ork—J u s t F u n . from other ships, successful ones, scraped on the ground during a
AVe tru s t you—u n til C h ristm as—if necessary .
S t. N IC H O L A S S E A L CO. and then make refinements as one landing, the wing would perhaps fail
D ent. 864 JM A B rooklyn, N . Y. learns. or collapse.
Going back to that wing spar, in For this reason we make all parts
Figure 1, we can easily see that the of the airplane several times
AgainSmascoScores! greatest bending stress is going to stronger than needed for normal
T h e S o u th e rn M odel A irp la n e S u p p ly Co. h a s
o ffe re d m odel a ir p la n e m a te r ia ls a t th e lo w e st
come at a point near the fuselage, flight. This is the factor of safety.
p ric e s in th e c o u n tr y for th e p a s t th re e m o n th s . because at that point the spar must For example, if we make our wing
N ow w e a r e th e f ir s t to o ffe r a new a n d m uch
ne e d ed p ro d u ct. C K L U 'L O I D P A N T S . T h e s e resist the loads on the whole half of spar five times as strong as it needs
a r e m ad e to fit o u r 2" w h e e ls am i co m e in
a s s o r te d c o lo rs to m atc h w h e e ls. S P E C IA L
the wing, while at points further out to be for normal llight, we say that
L O W P R IC E 25c A P A IR . the load decreases. Figure 2 shows the spar has a factor of safety of
P A N T S A S S E M B L E D W IT H W H E E L S T O
M A T C H SOc A P A IR . the bending stress for one half of a five.
Two inch celluloid w heels 20c a pair.
N . A. C. A. Cowling 25c each
monoplane wing without outside In the wing spar that we have just
D um m y W asp M otors (black celluloid) 50c struts. The distances from the base discussed, we found tlie material of
each. line to the curve are the values of the spar to be in bending stress. An
W E PA Y A L L PO ST A G E ON T H E ABOV E.
SEN D M ONEY ORDER. NO STA M PS. the bending stress. other type of stress is direct stress.
1
Southern Model Airplane Supply Co. This occurs when the member is
OR example: At the tip of the acted on by forces that are parallel
Post Office Box 149,
DORNIER DO. X FLYING BOAT

A T L A N T A , G EO R G IA
F wing, at the right, there is very to its length, whether these forces
little stress, so the curve comes downare pulling or pushing.
to the base line; meaning that at the Take a ruler, holding it with one
W ith A m erican C o n q u ero r Engines very tip of the wing, there is no hand at each end and push, each
2 F t. full size ecnlc m odel blue p rin ts w ith in struction* 75o.
2 F t. F ly in g scale m odel. C onst, seta w ith b lu ep rin ts in colored bending stress. As we go in toward hand toward the other. The ruler is
boxes.
•C A P T . H A W K S ’ T R A V E L A IR M Y S T E R Y S H IP $2.00
the fuselage, the curve shoots up now in direct stress. The particular
•S U P E R M A R IN E R O L L S -R O Y C E S G $2.00
T H E N E W S IK O R S K Y S 39 A Λ Μ Ρ Η ΙΒ ΪΟ Ν $1.50
rapidly, indicating that there is much kind of direct stress is in this case
more bending stress as we go toward compression, since the forces applied
the center of the wing. tend to compress the material of the
What good does this do the model ruler. If we pull on each end of the
builder? The curve shows that there ruler it is in tension because the
is very little bending stress at the forces applied tend to stretch the
T H E N E W S IK O R S K Y S 38 B Λ Μ Ρ Η ΙΒ ΙΟ Ν $1.75
• T H E G R E A T L A K E S S P O R T T R A IN E R $2.75
tip, doesn’t it? Then why make the ruler.
• L IN D B E R G H ’S L O C K H E E D S IR IU S (D O G S T A R ) $2.00
•F U L L S IZ E B L U E P R IN T S F O R A B O V E P L A N E S 50o
wing spar as heavy at the tip as it In the next article we shall look
S IK O R S K Y B L U E P R IN T S 25c
N o c h e c k » a c c e p te d , t e n d 6 c s ta m p f o r la rg e illu s tr a te d e a ta to g u u e . has to be at the center, where the into the stresses in the other parts
B R O O K LYN M O D EL A IR C R A F T CO. bending stress is greatest? There is of the airplane, so make sure that
1326 Flatbush Ave., near Foster Ave. Brooklyn, N . Y. no reason why we can’t in models you understand the various kinds of
save weight by cutting down the stresses that we have described here.
spars near the tips of the wings. It
AEROMARINE-KLEMM does not save very much weight, true, QUESTIONNAIRE
hut sometimes a very little weight
can make a lot of difference in the 1. In a wing spar to be used in a
length of a flight, especially in con monoplane without external wing
test work. bracing, where will the greatest
Try making your spars tapering, bending stress come—near the tip or
thickest at tlie center, smallest at near the center of the wing?
the tips, and note the saving in
weight without loss of too much 2. If one had a wing spar, a half
strength. But also watch out for inch wide and an eighth of an inch
F u ll S iz e B lu e P r in t Ci I n s tr u c tio n s - 50c overdoing the thing. Don’t make the thick, how should it be placed in the
C o m p le te C o n s tr u c tio n K i t - - - S3.00 spars unreasonably small. wing—laid flat or on edge? Why?
H O OSIER MODEL CO. To make a wing spar tapered, it 3. What is the advantage of the
311 E. M A I N S T . , M U N C I E , IN D . is not necessary to make the wing tapered wing spar for a model air
tapered. It is obvious that the spar plane?
November,'1930 JUNIOR MECHANICS AND MODEL A I R PL AN E NEWS 55
Handicraft Hints for the Junior Mechanic

The drawing shows the correct
angle. Yon may find it necessary to
load the cockpit with any convenient
material to get just the right balance.
Now make sure that the cords at
tached to your wing-tips are securely
lixed. Tie them together and fasten
the model to a third cord which runs S m a s h i n g B a rg a in
between two buildings or trees at the SEND NO M O N E Y
highest elevation you can get. Use L IM IT E D LO W
cord of low visibility, gray is best, P R IC E O F F E R
and at a short distance your plane
will appear to be in ilight.
Best of all, if the angle is right,
your plane will bank and turn in the
breeze and sometimes do a perfect
loop. If the cords are attached in SAVE OVER HALF
the manner shown, the plane will not ON THIS OFFER
tangle itself, no matter what evolu A Q uick P ick -U f B u t y o u s a v e still m o re
if y o u b u y n o w . E v e r y
tion it performs. t h i n g ' · i n c l u d e d in th is
Λ model “weather-plane-vane” of sp ecial lo w p ric e offer.
this type set up near Seattle, Wash

ington, soared for over a year until H EBE’S a handy pair of pliers or
tweezers that will prove useful
around the home or the workbench,
B ig . ru g g ed 10 C a b l e
E x e r c i s e r a d ju s ta b le to
200 lb s. re s is ta n c e . C o m
p le te W a ll E x e r c i s e r P a r t s fo r B a c k a n d S h o u ld e r
d e v e lo p m e n t. H a n d G r i p t h a t b u ild s h u s k y W ris ts a n d
the string rotted through . . . and the and that can be made in five min F o re a rm s. H e a d G e a r to b rin g o u t th o se d o r m a n t N eck
M u scles. F o o t S t i r r u p a n d H a r n e s s t h a t d e v e lo p s sinew y
plane came down, making a perfect utes. Simply remove the spring from C a lf a n d T h ig h M u s c le s .' R e g u la tio n H e a v y S k i n R o p e f o r
three point landing in the yard. a snap clothespin and reverse it, so
S p e e d , E n d u r a n c e , a n d W in d . A n d a c o m p le te ly Illu s tra te d
C o u rs e of I n s t r u c t i o n . All T h i s — F o r o n l y $4.481
T a k e a d v a n ta g e of th is te m p o r a r y low p ric e offer N O W .
that its ends bear against opposite J u s t s e n d y o u r n a m e a n d a d d r e s s . W e'll s h i p ev e ry
t h i n g o u t b y r e t u r n m a i l . P a y p o s t m a n o n l y $4.48
ends of the clothespin and hold them plus p o stal ch a rg e s. O u ts id e U n ited S ta te s , Cash
together. Cut small notches in the w ith Order.
IN S T I T U T E FO R P H Y S I C A L D E V E L O PM E N T , Inc.
wood to furnish a good seat for the 13 E a s t 2 2 n d S t . D ept. L-37 N e w Y o r k , N. Y.
spring. FLY IN G CLUB PIN S .- . - 35i?
-FR EE CATALOG
A T ack -P uller Design Shown silver plate 35 cents each. $3.50
doz. Cokl' plate or sterling silver 50 cents each.
$5.00 doz. Made with any 6 letters or less;
No. 4906 g colors eoamcL «
Ν old, worn-out fork will make
Δ one of the handiest tack-pullers
you ever saw. I t must be of the
four-tined variety. Cut off the tines
BASTIAN BROS. CO. 9B9 Batiku Bldg, Rodeder. N. Y.
to about three-quarters of an inch.

The outside tines are bent back to
make a fulcrum, and the two middle n
ones are filed away on the bottom so Postpaid
T doesn’t take any longer to cut
I these two sticks and set them in
the ground than it does to ram the
that they will slip in under the tack
head easily.
Ready to
Fly
end of a cane pole far enough in so G uaran teed to fly 45 seconds!!
that it will stand by itself. More W in g span, 2 4 .inches.
over, the great advantage is that the W eig h t, 3/4 ounce.
end of the pole stays clean. Besides,
the* jerk of a good-sized “cat” won’t C o stelloe-B ulger M fg. Co.
pull your pole down in the water if 2049 S o . 1 9 th S t r e e t
you use this kink. Lincoln, Nebraska
Under and over . . . that’s all. If
you try it the next time you go
“lazy-man fishing” you’ll become a MINIATURE MOTORS
convert. I t’s quicker, too, to lift and
pull in when that lioped-for yank
does come at the end of the line.
H o lid a y H o sp ita lity W ith o u t Extravagance

Y o u d o n 't have to be e x tra v a g a n t a nd w asteful in ord e r to e n te rta in d u rin g the h o lid n y season.
Y o u d o n ’t need to th ro w m o n e y a w a y needlessly in ord e r to e n te rta in y o u r friends a nd relatives
w ith charm and real o ld -fa s h io n e d h o s p ita lity .
Y o u r H o m e M a g a z in e has a lw a ys stood for a ttra ctiv e n e ss and c o m fo rt in the hom e w ith o u t ex
travagance. D ir e c t ly in line w it h th is p o lic y the N o v e m b e r issue co n ta in s a m on g oth e r inte re stin g ,
helpful features, an a rtic le w h ic h answers in a c ry s tn l-c le a r, in te llig e n t m a nn er the v it u lly im p o rta n t
question of h o lid a y d in n e rs. I t is e n title d , " D i n n e r is S e r v e d " and shows w it h text and p ictures the
finer p oints of table se rvice for the h o lid a y feast and the n ew er tab ic a p p o in tm e n ts of m oderate cost.
N o v e m b e r issue of Y o u r H o m e w ill also show yo u how to keep house in a m ore business-like

fashion, w ill b rin g yo u latest u p -to -d a te new s a b o u t the new tilin g s fo r in d o o r t rim , tell yo u a b o u t the T h e fin e st 4-, 6- a n d 8 -c y lin d e r c o m p re sse d a ir
new features in m od e rn hom e p lu m b in g fixtures, as w ell as a host of o th e r u p -t o -th e -m in u t e hom e - m o to rs m a d e . W ill fly 1Ά to 7 ft. m o d els. M o to r
m a k in g topics. d riv e r 6 f t. L o c k h e e d S iriu s a n il 3 2 " R u b b e r
d riv e n . 4 2 " tw in m o to r B u rn c lli M o n o p la n e .
Y o u r H o m e , a M a c fa d d e n P u b lic a tio n , tw e n ty -fiv e cents a c o p y. S e n d 10c fo r Catalogue.
O n all new s sta nd s O c to b e r’ 2 3 rd . I M IN IA T U R E A IR C R A F T CO R P.

83 Low T e rra c e , N ew B righton, N.Y.
56 J u n i o r M e c h a n i c s a n d M o d e l a i r p l a n e N e w s
-A T LAST-
A REAL SCALE M O D E L
OF TH E
WING SPAN
LENGTH
26M"
ALL BALSA
WORLD FAMOUS 22 "
ALL BALSA
BUILT-UP BUILT-UP
TRUE SCALE
MODEL DO - X TRUE SCALE
MODEL
Yes.! This is a picture (unmouched) of a model made from our $4.00 Educational Kit. Think boys! YOU TOO
can build the same model of the giant flying boat, as pictured above, from our kit.* It contains full-sized and
detailed construction plans (redraw n a n d tra n s la te d fro m th e o rig in a l a u th o ra tiv e D ornier P la n s s e n t to us
fro m G e r m a n y ). Also details of the new mounting for the American Curtiss-Conquerer engines, details of aluminum
propellers, lots of A. A. C. South American balsa wood cut to convenient sizes, A. A. C. colored dopes, Japanese
Hakone wing covering, water proof pontoon finisher and plenty more supplies to make this wonderful true scale model.
*This K it W ith o u t a D o u b t is th e M o st U n u su a l a n d O riginal Ever O ffered to You.
O rder Notv for Quick Delivery!

ONLY
S E N D C A S H (B Y R E G IS
T E R E D M A IL ) C H E C K O R
M O N E Y O R D E R T O A. A.
C . M O D E L A IR C R A F T E R S . A G E T O ALL P A R T S OF
U SE CO U PO N BELO W . C U T A L O N G L I N E U. S. A N D C A N A D A .
A. A. C. M O D E L A IR C R A F T E R S
4715-17-19 T h ird A ve., N . Y. C.
G en tlem en :
E nclosed is m y (C a sh .D C heck □ o r M oney O rder □ ) for $4.00 for th e A. A. C. M odel A ircrafters K it o f th e F a m o u s G erm an Flying
B o a t D o -X w hich I w a n t you to send a t once to :
N am e
A ddress
C ity or T ow n S ta te
RECORD HOLDING SCALE MODEL
Famous World War Plane
T H E S. E. 5 “A ”
24" W ingspan
The construction set for this
plane contains all the necessary
parts and material: ribs cut,
formers made, celluloid
wheels, full size layout exact scale blue prints and instructions. All wood parts are of
feather weight BALSA. The S. E. 5 “A” is easy to construct and is by far the best flying
scale model that can be built, holding the present record of 48 seconds. The S. E. 5 “A” has
a gliding angle of 12 to 1, a ceiling of 60 feet—nothing like it has yet been produced in kit sets.
The S. E. 5 “A” is the plane that won for the Royal Flying Corps the supremacy of the air
in the World War.
PR IC E FOR K IT $3.00, postpaid.
BALSA! HAWK Blue Prints!

S A L E Soaring G lider FULL SIZE and SCALE
24" W ingspan
1st grade feathe rweight C u rtiss H aw k P .6 ..................................................... $0.40
C urtiss H aw k (R adial P .3 .A .)............................... 40
n" X
X2 36" SI.00 Sea H aw k F .7.C .1.........................................................40
10 sheets 1/16" Boeing P u rsu it F .4 .B .1 ..................................................40
.50 S .E .5.A . Scout (1917) ..............................................40
5 sheets 1/16" X 2 X 36" V ought C orsair ............................................................. 40
o// W aterm an O .X .5. (1 9 2 1 ).......................................... 40
6 sheets 1 /8 " X 2 X 36" 1.00 T ravel A ir “ M ystery S h ip ” .........................................40
Lockheed “ S iriu s ” .......................................................... 25
3 sheets 1 /8 " X 2 X 36" .60 G erm an B .F .W .................................................................25
Sikorsky (10 p la c e )........................................................ 25
5 sheets 1/16" X 6 " X 18" 1.00 Ford T ri-M otor .............................................................. 40
Stinson D e tro ite r............................................................ 40
3 sheets 1/16" X 6 " X 24" .90
1,f
10 sheets 1/16" X 1 X 2 0 " .40
20 sheets 1/16" X 2" X 1 2 " .50 N O N SCALE B L U E P R IN T S
25 sticks 1/4" > 1/4" X 36" 1.10 This 24" glider can be assem
bled in 30 seconds. All parts Full Size
25 sticks 1 / 8 " > 1/4" X 36" 1.00
cut to size and shape. Cement N avy R acer (w ingspan 2 0 " ) ...............................$0.40
12 sticks 1 / 8 " > 1/4" X 36" .50 and insignias and instructions Commercial (w ingspan 2 8 " ) .......................................25
D uration T r a c to r ............................................................. 25
25 sticks 1 / 8 " > 1 / 8 " X 36" .60 are furnished. Has recorded
25 sticks 1 / 8 " > 1 / 8 " X 2 0 " .45 (light of one minute. PRICE
50 sticks 1/16" X 1 /16" X 2 0 " .50 FOR KIT S0.75, postpaid. SPEC IA L SCALE P R IN T S
(All 10" W i n g s p a n )
5c Tw o plans on one blue p rint

C urtiss H aw k P.3.A .
PR O P. BLOCKS Brings you a complete illus & T rav el A ir “ M ystery Ship” ..............$0.
C u rtiss H aw k P.6. & Boeing P u r s u it....................
trated booklet containing all Boeing Model 80.A & C urtiss C ondor..................
6 Blocks 5/8" X 1 1/8" x 7" $ .24 models shown above and other Sikorsky S.38. & Boeing Model 2 0 4 ..................
Fokker D.7. & S .E .5 .A .................................................
6 Blocks 3/4" X 1 1/4" x 8" .30 latest model airplanes, and S uperm arinc N apier & M ercury R a c e r...............
W allace T ouro Plane &- Inland Sport P la n e .. .:
6 Blocks 1" X 1 1/4" X 10" .45 model airplane supplies, Full Keystone Bomber & H all A lum inum P atro l.
6 Blocks 1" X 1 1/2" X 12" .60 description of materials and
equipment needed for each
EXTRA SP EC IA L SCALE P R IN T S
model. Every model is designed
T hree plans on one blue p rin t
P ostage 15c E x tr a to fly when made according to “ A vro T ra in e r,” B ristol “ B ulldog” F ighter
our simplified plans of construc and C ierva A u to g iro ........................... .......... $0.25
o n a ll o r d e r s u n d e r $ 1 .0 0 tion. Don’t fail to send for it. All blue p rin ts sent postpaid.
Hawk Model Aeroplanes

4944 IRVING PARK BLVD., DEPT. E-2 CHICAGO, ILLINOIS, U. S. A.
A T T D A T C A __AMERICA’S MOST EASILY t
J A U L · J D / A I vO / A c o n s t r u c t e d MODELS I
A new, all-balsa construction m akes these as light as the paper it replaces, and infinitely peller. W ings a t a high angle of incidence foi
M idland models superior to a n y th in g you have stronger! T he only paper is th a t used to cover fast clim b and m inim um center of pressure
ever seen. L ighter— a b o u t tw o-thirds th e weight th e to p and bottom of the fuselage and the tail. travel. Tips "w ashed o u t” to reduce losses.
of an o rd in ary model of th e sam e size. S tronger— No fragile, tedious, built-up fram ew ork. N oth Scores of o th er aerodynam ic refinem ents seldom
practically crash-proof. B etter-looking and more ing to draw . N othing to m easure off. No nails found in models.
realistic— sm ooth, sheet-balsa surfaces instead to drive, no holes to drill. A ready-m ade, die- You will find these models much easier to
of w rinkled tissue sagging betw een ribs and long stam ped alum inum propeller to save you the build, and, a fte r you have built them , much more
erons. Easier to build, because so much simpler. work of carving one and to prevent the failures satisfactory to fly. Few er trial a d ju stm en ts:
A job you can do in a couple of hours in stead of due to poorly-m ade propellers. S truts of spruce longer, stead ier flights.
a week. And you can do it. W e’ve elim inated and bamboo. Celluloid wheels, light and good-
the question of skill.
M id lan d 's all-balsa con stru ctio n m akes use of
looking. A shock-absorbing landing gear.
Colorless, quick-drying model cem ent— the fast
The MIDLAND MODEL WORKS
sheet balsa 1/32 of an inch thick for th e wings est-drying known R ubber 10% more powerful. Box W, Chillicothe. Ohio
and th e sides of th e fuselage. Balsa— alm ost Landing wheels well forward to protect the pro
T A P E R -W IN G C O M B A T
M O N OPLA NE—
A n U n u s u a l V a lu e
An exceptionally graceful model of a center-wing com
bat monoplane, and the best distance flyer of the Midland
group. Does 2 0 0 feet consistently. Can be hand launched
or will rise off ground. Very easily built, and will stand
hard use. Wing span 2 0 inches. Weight 8 / 1 0 ounce. M IDLAND BABY BULLET
Cc .iplete set, with all material and full building and
flying directions, postpaid in the United
States and C an ad a............................................ $2.00 Wing span 15 inches. Weight 3/8 ounce. Flight
range 140 feet or more.
A simple, easily-constructed r. o. g. model of a
one-place low-wing sport plane. The propeller is
only one-fourth as long as the wings, and much
closer to true scale than in ordinary models. Pro
peller blades deeply curved for slow revolution and
unusual duration.
Complete set, with all material and full building
and flying directions, postpaid in the
United States and Canada, o n ly ........... $1.00
R E A L IS T IC A R M Y B IP L A N E
T h is fast biplane fighter is a trem endously im pressive model. Its trim fuselage and ta p c ied . close-
set wings give an impression of speed, and in th e air it looks so m uch like a real ship p ra t flight photo
graphs of th e mode! are usually m istaken for pictures of a full-sized airplane.
The wing spread is 20 inches, the weight exactly 1 ounce. T he flight distance is close to 200 feet.
Because of its g reater wing area the A rm y Biplane gains a great deal of a ltitu d e . T h e average limit
is a b o u t SO feet, bu t we have photographed it when alm ost th re e tim es th a t high!
The to p wing is in advance of th e lower one, and a t a larger angle of incidence. T his results in the
cen ter of pressure of both wings being shifted forward when th e model dives, bark w hen it climbs.
This is th e exact opposite of the usual m ovem ent, and gives th e model unequaled stab ility . By far
the b est rough-w eather flyer
we have seen.
H arder to build than tlic
monoplanes, b u t still much
easier th an any conventional
built-up model. Com plete set,
w ith all m aterial and full
building and flying directions,
postpaid in the ř p f\
1 O U T of 10 U nited S tates 'K /
and C anada . . .
ill
P ro b a b ly n o t one m odel a irp la n e in te n e v e r g iv es

its p u rc h a s e r a sa tis fa c to ry Right. S o m e failu re s
are d u e to c a re less c o n s tru c tio n . Som e a re d u e to
careless dcsiytt— a carelessn ess so m e tim e s so g re a t
t h a t th e m odel can n o t be. m ad e to fly u n d e r a n y
ORDER N O W —U S E THIS COUPON
co n d itio n s. H ut th e m a jo rity of failu re s a re d u e to
th e tre m e n d o u s d ifficu lty e n c o u n te re d in b u ild in g
iiifiiv m odels.
The M IDLAND MODEL WORKS, Box W, CHILLICOTHE, O H IO
T h e a v e ra g e m odel w o u ld he e n tire ly s a tis fa c to r y
if it could he c o n s tru c te d w ith less sk ill, h u t it m ay Gentlemen:
be a sad d isa p p o in tm e n t to th e o r d in a r y m odel
builder, w ho o fte n fin d s t h a t he lias w asted b o th h is Enclosed find S.................for which send me your construction set tor ( ) BABY
m oney and his tim e on a s e t w h ich o n ly a n e x p e rt
c a n p u t to g eth e r.
BULLET ( ) COMBAT MONOPLANE ( ) ARMY BIPLANE. 1 understand
Λ sim ple a n d e a sy c o n s tru c tio n is th e k e y -n o te of that these sets will be sent postpaid in the United States and Canada, and that you will
M idland design. W e d o n o t p re te n d t h a t M id la n d
m odels are cxxcl scale rep ro d u c tio n s, for su ch refund the purchase price of any model which fails to satisfy me after I have con
m odels a re ha rd to b u ild , u n s a tis fa c to ry to fly. W e
do n o t claim t h a t th ese m odels will b re a k rec o rd s,
structed it.
for rec o rd -b re a k in g m odels are to o d e lic a te to b u ild , (Check or money order safer than cash. We cannot accept stamps or fill C O D’s. No
too fragile to last. All t h a t w e say is t h a t th e s e
m odels are pleasingly realistic, t h a t th e y will fly
catalogue, except with set.)
well tim e a fte r tim e, a n d t h a t th e a v e ra g e h o y c a n
build .th e m . W h y risk d isa p p o in tm e n t by p u r c h a s
ing a m odel a d v e rtise d w ith e x tr a v a g a n t c la im s of Name..................................................................................................................................
e x a c t scale design a n d a lm o st u n b e lie v a b le flying
a b ility ? Huy a M id la n d m odel a n d g e t w h a t you
expect, and w h a t you a rc e n title d to h ave.
Y ou are d o u b ly safe in o rd erin g M id la n d s e ts Street..................................................................................................................................
because n o th in g b u t a c tu a l, u n reto u c h e d p h o to g ra p h s
a re used to a d v e rtis e th em . R e m e m b e r t h a t a n y
p h o to g ra p h of a M id la n d m odel show s it a s you will
- e t it — n o t m erely a s vou w ould like to h a v e it Citv........................................................................................S ta te ..................................

Model Airplane News 1930-11

Uploaded by

Copyright:

Available Formats

Model Airplane News 1930-11

Uploaded by

Document Information

Original Description:

Copyright

Available Formats

Share this document

Share or Embed Document

Sharing Options

Did you find this document useful?

Is this content inappropriate?

Copyright:

Available Formats

Model Airplane News 1930-11

Uploaded by

Copyright:

Available Formats

What models are described in the document?

What models are described in the document?

What materials are listed for building model airplanes?

What materials are listed for building model airplanes?

SUNRISE MODEL AIRPLANES AND SUPPLIES!

Travel A ir M ystery Plane

The Sunrise Midget Curtiss Army Hawk

This model is copied a fte r the fam ous parasol

SUNRISE MODEL AIRPLANE SUPPLY CO. Dept. A - l l , Cedarhurst,N.Y.

P u b lis h e d M o n th ly by M O D E L A I R P L A N E N E W S P U B L I S H I N G C O R P .. W a sh in g to n a n d S o u th A ves., D u n c ile n . N .J J .

E have previously dealt with magnetic and

W earth inductor compasses. This month, we

Quick Thinking and

Is Called Lor and Up

Among the Clouds Larry

Takes a Long Chance—

Flying in perfect military

mechanical bird that approached him. It came

HE slipstream flung a veritable gale behind him,

TV this issue the rolls sideways to the

T faces which govern the

left. The pilot usually grasps it with his right hand.

S we learned in each member, how can we

A Solid Scale Model of a Curtiss ^Condor"

T the scene of the most extensive mimic Avar eAer

j[j)f]nin(i3ii -— ^ — v— Gunners Cockpit

TeSQ. Bam boo, p o in te d

DETAIL OF LANDING GEAR

18 J unior M echani cs and M odel A i r p l a n e N ews

is now finished, and should be carefully and

Cutout for w in d o w s on both sides

The steps n e cessa ry in constructing

r P H E newest in vehicles are shown above. At left

spaces and two small picture you wish to

Special Course in Air Navigation

vente d b y a you your drift, or the angle your

Time after time others have tried it, then

'‘C le v e la n d B lu e D ia m o n d ’1 Sym bol of H on est Q u a lity , R e a s o n a b le P rice and Speedy 6 -H o u r S ervice

Model Engineers, 1866N W est 57th St., Cleveland, Ohio, U.S.A. II \

{Continued from page 38)

How to Build a Cabin-Boat

MOSKITO MODELS AND SUPPLIES

READ THESE STA RTLIN G PRICES O T H E R M O S K IT O

have never done this, ask the store

If a mahogany propeller has been $2.15

Paint the nose piece, landing gear, R. O. G. S p irit of

elevator and the wheels should be of ing a b o u t C h ristm a s . If y o u r

Southern M odel A irplane

A second method of taking off, and

the glider off the ground as soon as

tempted bp the student pitot only

greater speed, thus increasing the

ground crew, and should himself he

/Is tong as the cable is ta u t the

A Scale Model of a Curtiss "Condor"

B1LD-0-PLANE From the Ground Up

Whittling for Fun

frames to hold the glass firm. P io n e e r’s N ew Book

DORNIER DO. X FLYING BOAT

this type set up near Seattle, Wash