ARF 73in EXTRA330SC 120E & 30CC Manual (20150610)
ARF 73in EXTRA330SC 120E & 30CC Manual (20150610)
ARF 73in EXTRA330SC 120E & 30CC Manual (20150610)
Instruction Manual
Dear Customer,
ARF Model proudly presents 73in EXTRA330SC 120E & 30CC, Extreme Series, which is a premium
product line of electric & gas RC airplanes designed for unlimited 3D performance. The new 73in EXTRA
120E & 30CC adopts cutting edge aerodynamic features, such as streamlined canopy, aileron
counterbalance, removable side force generators (SFGs) .The 73in EXTRA is also loaded with high-end
accessories including CF landing gear, tail wheel assembly and control horns. KUZA brand CNC
Aluminium Backplate Hollowed-out Spinner is included as bonus (limited quantities) for 120E version.
And KUZA new fuel Tank Assembly is included for 30CC version.
Models are not insurable but operators are. You can obtain coverage through membership in the Academy of Model
Aeronautics (AMA). For an AMA information package call 1-800-435-9262, ext. 292 or visit the AMA website at
"www.modelaircraft.org".
By the act of using the final assembled model, the purchaser/operator accepts
all resulting liability.
SPECIFICATIONS
WING SPAN: 73"(1860mm)
LENGTH: 70"(1780mm)
WING AREA: 1028sq in(66.3sq dm)
FLYING WEIGHT: Gas Version is 9.7-10.5lbs(4400-4700g)
Electric Version is 9-10lbs(4100-4500g)
Glow: .91-1.20(2C) 1.10-1.40(4C)
Gas: 26CC-38CC Gas DLE30 DLE35
RADIO:4CH/4-5S
FEATURES INCLUDED
X-shade wood structure ensures high strength of rudder and elevator while keeping the weight do
wn.
Removable stab & rudder
Behind the rudder tray an air exit opening has been created for electric set-ups
Side force generators
New KUZA Fuel Tank Assembly with aluminum tank cap for 30CC version
KUZA Aluminium Backplate Hollowed-out Electric Spinner included for 120E version
(Excellent cooling effect for brushless motor)
Scheme B White/blue/black
Scheme C White/blue/red
Scheme D White/blue/red
Items Required to Complete This Model:
Note: As with all kits, it’s a good idea to read all the instructions and study the parts before you begin
construction. Handle the parts of this kit with care so you do not damage any of the structure or covering.
Inspect all the parts for any shipping damage and report any issues to as soon as you can. Make sure you
have a flat and sturdy workbench and follow all safety advice for the tools and adhesives you plan to use.
AIRCRAFT COVERING
1. With all ARFs, varying temperatures and storage delays can cause covering material to loosen over time
and transportation. recommends lightly going over all the covering with a covering iron set at medium
temperatures. Be sure to use a soft cover over your iron so you do not scratch the covering surface.
Be sure you go over all seams and edges of the covering to assure it is secure to the airframe and other
covering. Be careful not to apply too much heat or you may cause bubbles or damage to the covering.
A heat gun may also be used along with a soft cotton cloth to shrink and adhere the covering. Again,
be extremely careful when using a heat gun.
2. Be sure to seal any exposed wood with a thin coating of epoxy to prevent engine oil from soaking
in. This is especially important around the engine compartment and servo openings with exposed
areas.
3. Some modelers prefer to seal the hinge gaps using strips of appropriate covering or clear trim tape. We
have found this to be helpful with models intended for higher speed flight or models with unusually
large hinge gaps. aircraft utilize a very tight double beveled hinge line and do not normally require this
step. Sealing the hinge gaps is therefore left as an option for the modeler.
There is a layer of protection film on the horns. Please remove the film as shown following picture.
Make sure to sand the horns so the surface is rough to glue correctly.
KUZA 3” Aluminium Backplate Hollowed-out Electric Spinner for 120E version (Bag No. KAG0205)
Pushrods: Two 2.5x60mm Pushrods for aileron. One 2.5x130mm Pushrod for elevator.One 2.5x110mm for
rudder(Pull-push style)
Side force generators (mounted with four M3X18 hand bolts and 2 balsa sheets)
Bolts & washers for cowl: 4(3x14mm) Hexagon bolts and 2(10mm) PTFE washers and 2 wsahers
Wing Assembly
NOTE: There are pictures of different planes in this manual, however, this plane’s wings is assembled the
same way.
1. It is much easier to install the twin control horns before installing the wing. Locate the fiberglass
aileron control horns, ball links, and associated bolts and nylon-insert lock nuts. Use some fine sandpaper
to roughen up the center areas of the two control horns so that the glue adheres better. Using a sharp hobby
knife cut the covering away from the slots in the rudder and trial fit the two control horns.
2. Mix up some 30 minute epoxy and coat the inside of the slots and the center of the control horns. Hint:
a scrap piece of 1/16” ply, tooth pick, or old hobby blade can be used to coat the inside of the aileron slots.
Slide the control horns in place and make sure they are centered perfectly by using a ruler to measure
between the pivot holes and the hinge line. Wipe any excess glue off with isopropyl alcohol and paper
towels. Install the ball links, bolts and nuts into the holes to help assure alignment of both control horns
while the glue cures. Set aside until cured.
3. The slots for the supplied hinges are pre cut. Locate the hinges and dry fit the hinges and aileron into
place and test the operation. The hinges should seat fully into the slots so that the hinge line gap is minimal
while still allowing full aileron deflection.
4. Before gluing the hinges in you must first clean the hinges of any mold release agent using isopropyl
alcohol. We also recommend scuffing up the plastic with light sandpaper for maximum glue adhesion.
5. Mix up some 30 minute epoxy and using a toothpick or small wooden dowel coat the inside of each
hinge slot with epoxy. Also put a thin layer of epoxy on one side of the hinges. Install this end into the
slots of the rudder and make sure each hinge is properly aligned at exactly 90 degrees to the hinge line.
6. Now coat the other end of the hinges with epoxy and install the aileron into the trailing edge of the wing.
Again, make sure the hinges remain in proper alignment. Using paper towels and some isopropyl alcohol
clean off any excess epoxy from the hinges and surrounding areas.
7. Make sure the aileron is fully seated so that the hinge gap is minimal while still allowing full deflection of
the aileron. When satisfied, use some masking tape to hold the aileron in place along the bottom and
counterbalance. After the epoxy has cured, remove the masking tape and check for proper operation. If
the hinges are stiff some light oil carefully placed on each hinge will help greatly.
8. Cut the covering from the aileron servo openings from corner to corner and iron down inside the openings.
Connect servo wire extensions to your servos and secure the connections with the supplied clips, your own
clips, or tape. Feed the servo wires into the wing and out the root. Install the servos and screw firmly in
place.
9. Use your radio to set the centers of each servo and then assemble and adjust the length of each control rod.
The servo arm should be as close to perpendicular to the control rod as possible while the aileron is at
neutral. Double check all screws, bolts and nuts to assure proper installation and operation without
binding.Once satisfied, permanently attach the ball link to the servo arm with the supplied screw and nut.
10. Check the final radio operation of the ailerons and make sure there is no binding or servo fighting of
each other. Also check to make sure all linkage bolts and nuts are secure.
11. We recommend using KUZA 1.5” aluminium CNC servo arm (sold separately) for wing control.
Elevator Assembly
1. Push rod linkage set for elevator
2. Find the control horn slots on bottom side the elevators, use the method described in 1.2-1.4 to
install control horns for elevators.
3. Elevator horn slot is located on the left side of elevator. Remove covering over the hole for
horizontal stabilizer on fuselage. Removing covering on the central part of horizontal stabilizer is
recommended for better glue bonding. Insert the horizontal stabilizer into fuselage, make sure it’s
centered. Apply thin and gap-filling medium CA to glue it in place.
4. Glue the nylon hinges for the elevator with epoxy glue.
5. Locate the slots for elevator servo, remove covering. Connect wire extension to your servos
before feeding the wire into fuselage. Install servo with screws supplied by servo manufacturer.
6. Use your radio to set the servo center position and install the large control horn onto the servo.
Assemble the control rod and ball links and adjust the control linkage for proper geometry.
When satisfied, screw the ball link to the servo arm and control horn. KUZA 1.5” aluminium
CNC servo arm is recommended for elevator control, the servo arm should be as close to
perpendicular to the control rod as possible while the elevator is at neutral. Double check all
screws, bolts and nuts to assure proper installation and operation without binding.
Rudder Assembly
1. Rudder pushrod linkage set. NOTE: Rudder is Pull-push style.
2. Locate rudder, a control horn and base plate. Rudder is driven by pull-push rod, servo bay is on the right
side of the fuselage.
3. Locate the slot for control horn on rudder, remove the covering over the slot with heated soldering iron
or sharp hobby knife, and make sure you do it on the right side of the aileron. Insert control horn into base
plate then into the slot, trace the edge of base plate with hobby knife then remove the underlying covering.
4. Use some fine sandpaper to roughen up the root of control horn where will be glued into the slot.
5. Fill the slot and coat the root of control horn and the bottom of base plate with 30 minute epoxy, insert
the horn into the slot, press it down firmly. Wipe off excessive epoxy with alcohol wipes. Set aside until
cured.
7. Cut the covering from the rudder servo slots from corner to corner and iron down inside the openings.
Connect servo wire extensions to your servos and secure the connections with the supplied clips. Feed
the servo wires into the fuselage. The screw holes for servo mounting are laser pre-drilled, it is
advisable to apply some thin CA to strengthen them, Install the servos and screw firmly in place.
8. Use your radio to set the center of servo and then assemble and adjust the length of the control rod.
The servo arm should be as close to perpendicular to the control rod as possible while the aileron is at
neutral. Double check all screws, bolts and nuts to assure proper installation and operation without
binding. Once satisfied, permanently attach the ball links to the servo arms and horns with the supplied
screw and nut.
9. We recommend using KUZA 1.5” aluminium CNC servo arm (sold separately) for rudder control.
2. Slide 3 wheel collars and the wheel onto the pre-bent tail wheel wire and tighten in place with thread lock as shown
below.
3.Install steering rod, again, the use of thread-lock on any metal to metal screw is advised.
4.There are 3 pre-installed blind nuts on the rear of the fuselage, locate the screw holes and puncture the
covering. Then install the CF tail wheel bracket with M3X16 self-threaded screw.
5.Drill a screw hole on the bottom of rudder, 190-210 mm away from the hinge line, with 2 mm drill bit.
Secure one end of the wheel spring with a M3X12mm self-threaded screw, then hook the other end onto the
steering rod.
3. Adjust the position of the landing gear fairings, the secure with glue (shoe goo type).
4.Loosen out the inner nut, then apply thread lock to the axle. Tighten the nut back in place, allow the
thread locker to dry.
5.Install the wheel axles to the landing gear and tighten the nylon-insert lock nut. Install one wheel collar
onto the axle. Use a second wheel collar as a guide to leave a gap on the inboard of the axle. Use a small
drop of thread-lock and tighten in place. Slide the wheel onto the axle and install a second wheel collar
also using thread-lock on the set screw.
6.Fit the wheel pant in place and install using the two supplied screws. Use thread-lock to secure the
screws in place. Repeat the above steps for the other main gear.
For 30CC version,Engine, Exhaust, & Fuel System Installation
Engine Installation
NOTE: There are pictures of different planes in this manual, however, this plane’s engine is assembled the
same way.
1. Select the proper guide for your engine and drill the holes and cut out the center as indicated. Notice
that the engine center line is offset to the left to compensate for the right thrust built into the engine box.
2. Fit the Cowl and measure the distance from the engine bulkhead to the front of the cowl, add approx
2-3mm for the back plate and this is the length that your engine should be set Using the correct length
stand offs, mount your engine securely using bolts, washers, and locknuts. The use of thread-lock is also
highly essential for the engine bolts.
3. Mount the ignition module according to the manufacturer’s instructions. The best place to mount it is
on the side of the engine box. Secure the pickup lead and ignition wires with zip ties so that they do not
vibrate or touch any hot part of the engine or exhaust.
5. Assemble the throttle servo mount using the supplied laser cut parts or there is a servo cutout in the
bottom of the engine box for 28cc-38cc engines. Mount your throttle servo and complete your linkage
setup. A hole will need to be drilled on the firewall to allow the pushrod to connect to the throttle arm on
the carb.
6. An extra servo can be fitted for choke or a mechanical linkage can be used.
7. The KUZA new 360CC fuel tank is preassembled. Complete the installation in the fuselage using zip
ties or velcro straps to hold the tank in position. Connect a fuel line between the tank and carb, a fuel line
between the tank vent and the bottom of the fuselage, and a fill line to a fueling port which can be mounted
on the fuselage side opposite your ignition switch. Make sure your vent line does not come close to any
hot exhaust part such as the muffler or canister. recommends the use of small zip ties or fuel line clamps to
secure the lines to the tank.
A barb on the bottom of the fuselage can be fitted for the vent.
Installation of KUZA Fuel Dot and Fuel Vent Line Plug (Not included)
1. From June 2015 and on, all Goldwing gas airplanes are made ready for KUZA fuel dot
and vent line plug. Available in three colors: black, red and blue.
Sites for KUZA fuel dot installation are pre-cut on both sides of the fuselage, you may install
Secure the housing of fuel dot with supplied 2.5 mm self-tapping screws, then plug and
install the fuel line to complete the setup of fuel dot.
Similarly, two sites for vent line plug installation are available at the bottom of the fuselage.
Secure KUZA vent line plug with four 2.5 mm self-tapping screws as shown below.
120E Electric version Motor Installation
1. Find the washers for motor installation in the 120E version hardware package.There are 8 POM
washers,and 16 ALU washers.
2. Blind nuts are pre-installed behind the firewall. Since the position of cowl is fixed and length of motors
varies, you may need to use provided washers to position you motor properly.
3. Fix the battery with both Velcro and straps.
COWLING INSTALLATION
NOTE: There are pictures of different planes in this manual, however, this plane’s cowling is assembled the
same way.
1. The cowl is secured with four 3 X 14mm bolts and washers.Apply nutlock onto the bolts as the
vibration from the gas engine will shake them come loose.
2. Labels are provided for aligning the drill holes for the cowl. Stick then on without the cowl, mark the
hole. Fit the cowl then press back down. The hole will then show the area to drill. Sere below.
FINAL RADIO SYSTEM INSTALLATION
1. Whether you 72 MHz systems or the newer 2.4 GHz systems, proper radio installation and care is vital
to the safe and reliable operation of your aircraft. Follow the manufacturer’s instruction for installation
guidance of receivers and batteries paying attention to factors such as vibration isolation, adequate cooling,
and clearances.
2. Mount your reciever(s) securely in a location which provides a clean and maintenance free solution to
your setup. All servo wires should be neatly routed and secured in place so they will not come loose or
flop around during flight.
3. The fuselage ply sides provide space to mount your switches just below the canopy. Mount your
switches according to the manufacturer’s instructions and route your wires safely and securely as above.
4. Your receiver battery(s) can be mounted in a variety of locations depending on your balance needs.
Regardless of where you mount your batteries it is vital that they are very secure with no possibility of
coming loose. Use double sided velcro to hold the batteries from sliding around and then use zip ties or
velcro straps to secure them tightly in place.
5. Servo and battery leads are the life blood of your aircraft. Make sure all wires are top quality and
connectors are tight and display no loose pins or frayed wires. Servo clips are provided in the kit for your
convenience. These servo clips can even be glued to the wood structure using CA if desired.
6. Check all radio programming and control surface operations thouroughly before your initial flight.
Check your radio range according to the radio manufacturer’s instructions both with the engine off and
running.
3.Installation of stab
Also the stab is removable for convenience in transportation,
Attach elevators with 3x12mm Hex-head bolts and 10mm PTFE washers. Check these after every flight.
4. Install the wings onto the fuselage being careful to align the wing tube with the wings and not force it.
The wing tube may be initially tight but will loosen after some with use. Guide your servo wires into the
fuselage openings and connect to the correct aileron channels. Servo clips are recommended. Once you
have the wings fully seated in the fuselage tighten the wing bolts inside the fuselage.
* KUZA CNC Aluminum Fuel Vent Line Plug 3 color to choose: black, blue, red
For JR servo(23T):
39mm/1.5in Single No. KAG0S72J
* KUZA new Wingbag for 73in EXTRA Two color to choose: red/ black, blue / silver
No. KAG0093