Clase 03 Sys2 PDF

ATA 62
MAIN ROTOR(S)
The major components of a helicopter are the airframe, fuselage, landing gear, powerplant, transmission, main rotor system,
and tail rotor system.
The rotor system is the rotating part of a helicopter which
generates lift. The rotor consists of a mast, hub, and rotor
blades.
ATA 62-00 GENERAL
The main rotor system is mounted on the static support mast and
driven by the main rotor drive shaft. The main rotor system
provides the lift, and by control input, lateral, longitudinal, and
collective control. The main rotor system consists of the main
rotor blades, pitchcase assemblies and main rotor hub assembly.
ATA 62-10
ROTOR BLADES
The main rotor blade assembly is
attached to the main rotor hub by
the flexbeam and blade retention
bolts. Main rotor blades are
constructed of fiberglass using
bonded pre-cured spars and skins.
Behind the spar the blade is filled
with a honeycomb core.
ATA 62-10
ROTOR BLADES
The main rotor blade installation includes:
A. Rotor Blade Retention Bolts

B. Abrasion Strips
C. Trim Tabs
D. Electrical Grounding
ROTOR BLADE RETENTION
BOLTS
Rotor blade retention bolts are high

torque bolts with expandable bushings.
They attach the rotor blades to the
pitchcase and flexbeam. With the bolt
inserted and torqued, the expansion
bushings create an interference fit
installation to lock the bolt in place. The
rotor blade retention bolt creates a
positive alignment of the pitchcase,
flexbeam, and rotor blade.
ABRASION STRIPS
Two metal abrasion strips are bonded to the leading edge of the rotor blade to
provide protection against erosion. Inboard abrasion strips are titanium. Outboard
abrasion strips are nickel. Behind the lower edge of each abrasion strip is a fiberglass
pad that resists low angle of incidence abrasion.
TRIM TABS
Trim tabs are located on the trailing edge of

each rotor blade. The trim tabs are bent up or
down to track the rotor blades.
ELECTRICAL GROUNDING
An embedded metallic mesh (Astrostrike) in the blade skin electrically connects the
abrasion strips with grounding lugs located near the root of the blade. Bonding
jumpers connect these lugs to similar lugs in the pitchcase. This electrical path
reduces, or eliminates, damage caused by lightning, and provides for static
discharge from the rotor blade.
ATA 62-20 ROTOR HEAD(S)
Complete rotor head(s),
including blade folding
system(s). Includes sleeves,
spindles, dampers, rotor
head fairing(s) as well as
rotor shaft(s) and
swashplate(s) if the rotor
head and shaft constitute a
non-dissociable assembly.
ATA 62-20 ROTOR HEAD(S)
The MRH is made up of two principal components the hub and the Swashplate.
The hub consists of an upper

and lower plate, hinge
assemblies, sleeve and
spindle assemblies, and
six pressurized
dampers.
The Swashplate consists

of a rotating disc and
stationary disc
connected together.
The hinge assemblies
allow the blades to
lead, lag, and flap.
The sleeve and spindle
assemblies allow each
blade to be turned on
its span wise axis to
change blade pitch.
The dampers
prevent damage to
The adjustable control the head by
rods extend from the absorbing blade
sleeve and spindle loads during rotor
horn assembly to the operation
rotating Swashplate.
ROTOR BLADES MOVEMENTS
ROTOR BLADES MOVEMENTS
• coning: The conicity is the angle between
the longitudinal axis of the blade and the
theoretical plane of rotation.
Other Rotor-related • theoretical plane of rotation : It is the
plane perpendicular to the axis of rotation,
Concepts at the level of the articulation of the blade.
• Solidity rotor: It is the relationship
between the effective surface of the blades
and the surface of the swept disk.
• Disk loading : It is the ratio between the
total weight of the helicopter and the
swept disk. Disk loading = Weight / Sup.
Disco [=] Kg / m2
TYPES OF ROTORS
According to the hub
▪ Rigid Rotor System.

▪ Semirigid Rotor System
▪ Fully Articulated Rotor System
▪ StarFlex.
Según la Posición:
▪ Conventional.
▪ Tandem.
▪ Coaxial.
▪ Synchropter
▪ Transversals.
▪ Jet-Tip.
Rigid Rotor System.
Semirigid Rotor System
Fully Articulated Rotor System
Rotor StarFlex (de Piezas Flexibles)
CONVENTIONAL.
Bell 206B
TANDEM.
Boeing IDS CH-47D Chinook
COAXIAL.
Kamov KA-50 “Dark Shark”
Kamov KA-32 “Helix-C”
http://www.kamov.ru/en/
SYNCHROPTER
Kaman K-Max
Kaman HH-43 Huskie

TRANSVERSALS.
Mil MI-12
El V-22 Osprey también es llamado “Convertiplano”
Jet Tip
ATA 62-30
ROTOR SHAFT(S) / SWASHPLATE
ASSEMBLY(IES)
ROTOR SHAFT(S)
The axis around which the major rotor of a

helicopter turns
SWASHPLATE
The Swashplate has two halves; stationary and
rotating.
The stationary Swashplate attaches to the primary

servos and transfers inputs to the rotating Swashplate.
The rotating Swashplate rotates with the rotor head

and transfers inputs from the stationary Swashplate to
the pitch horn.
The Swashplate assembly pivots around the drive

shaft on the uniball.
Lift and direction control
What makes a helicopter rise or fall is the variation in its angle of attack that is given to
the rotor blades: a greater inclination, greater lift and vice versa.
The direction of the helicopter is achieved by a complex mechanism that varies the
angle of incidence (inclination) of the blades of the main rotor depending on their
position.
Helicopters do not vary the speed of the blades or tilt the rotor shaft to move.
What they do is to vary slightly and cyclically the pitch (inclination) of the blades with
respect to the one they already have all (the collective of blades).
This cyclic increase in one sector causes the helicopter to move to the opposite side.
ATA 62-40 INDICATING
This is a picture of a Bell 206BIII instrument panel

That portion of the system which indicates operation or activation of rotor
systems. Includes items such as lights, gauges, switches, wiring, etc.

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ATA 62

A. Rotor Blade Retention Bolts

Rotor blade retention bolts are high

Trim tabs are located on the trailing edge of

The hub consists of an upper

The Swashplate consists

▪ Rigid Rotor System.

Kamov KA-50 “Dark Shark”

Kamov KA-32 “Helix-C”

Kaman HH-43 Huskie

The axis around which the major rotor of a

The stationary Swashplate attaches to the primary

The rotating Swashplate rotates with the rotor head

The Swashplate assembly pivots around the drive

This is a picture of a Bell 206BIII instrument panel

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