Helicopter Rotor Drive System Parts Catalog

A helicopter rotor drive system features a control system and rotary blades. The rotor system is the rotating part of a helicopter which generates lift and consists of a mast, hub, and rotary blades. The blades are attached to the hub using various nuts and bolts. There are three main types of rotor drive systems: semirigid, rigid, and fully articulated. The classifications are based upon how the motor blades are attached and move in accordance to the main rotor hub.

In semirigid rotor systems, two blades are attached to a central hub. The hub can tilt according to the main rotor shaft using a teetering hinge. The teetering hinge is significant as it allows one blade to flap up and the other to flap down. This decreases the lead and lag forces on the blades. Semirigid rotor systems are simple, however the downside is that the reaction to control input is not as quick as articulated rotor systems.

In rigid rotor systems the blade roots are rigidly attached to the rotor hub. As they do not have hinges, rigid rotor systems rely on the bending of the rotor blades. The blades are unable to flap or utilize lead and lag movements. Despite these factors, rigid rotor systems are relatively straightforward in design and principle. Rigid rotor systems are considered to be the happy medium between semirigid motor systems and fully articulated systems. A disadvantage of rigid rotor systems is the higher vibration levels that compromises the overall control and comfort of the helicopter.

Fully articulated rotor systems allow for more movement in the blades. The blades have lead/lag, independent flap capabilities and the ability to feather. Fully articulated rotor systems have two or more main rotor blades. As the rotor spins, each blade responds to inputs from the control system to enable aircraft control.

Newer rotor systems use elastomeric bearings, which are arrangements of rubber and steel that can allow motion in two axes. Compared to metal bearings, elastomeric bearings require less maintenance as they wear better.

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Part No RFQ
NAS1352-4-12 RFQ
C018-2* RFQ
C006-2 RFQ
NAS6603-10 RFQ
D110-1 RFQ
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C006-1 or -3 RFQ
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B270-2 RFQ
C007-5R RFQ
NAS6603-8 RFQ
C168-5 RFQ
B263-19* RFQ
B049-3 RFQ
C007 RFQ
NAS6605-38 RFQ
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C166-4 RFQ
A653-2* RFQ
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C647-1 RFQ
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D123-1 RFQ
A185-1 RFQ
B270-10 RFQ
012C RFQ
B330-16 RFQ
A185-2 RFQ
D276-3 RFQ
220-242400-09 RFQ
A185-5 RFQ
C553-1 RFQ
C653-3* RFQ
NAS428-3-14 RFQ
C215-029 RFQ
D500-1 RFQ
B320-2 RFQ
A938-5 RFQ
MS21042L4 RFQ
A215-042 RFQ
C257-2 RFQ
D174-2R RFQ
C966-5 RFQ
A215-017 RFQ
B157-1 RFQ
D117-2 RFQ
C006-6* RFQ
B289-3 RFQ
B033-6 RFQ
C018-2R RFQ
C167-5 RFQ
MS27039C0806 RFQ
A15A RFQ
C966-3 RFQ
C191-1 RFQ
MS35206-219 RFQ
D110-1 RFQ
5541K11 RFQ
A257-2LT RFQ
B570-1 RFQ
NAS6604-21 RFQ
MS27039C0812 RFQ
A650-4 RFQ
C006-8* RFQ
A654-56 RFQ
A215-156 RFQ
A215-382 RFQ
MS27039C1-09 RFQ
AN814-8D RFQ
B033-6 RFQ
NAS6603-11 RFQ
MS21042L3 RFQ
C215-279 RFQ
C273-1 RFQ
KI-202 RFQ
C251-2 RFQ
D112-1 RFQ
B158-8 RFQ
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B263-15 RFQ
31M22972* RFQ
NAS6604-13 RFQ
C251-1 RFQ
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MS24665-283 RFQ
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C018-3R RFQ
MS21042L6 RFQ
C184-2R RFQ
D111-1 RFQ
AN742-3 RFQ
A215-020 RFQ

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