Helicopter rotors

Details Helicopter rotors Helicopter rotors

1979-05-09

1981-10-27

Bentley, Stephen C.

Fluid reaction surfaces (i.e., impellers)

Articulated, resiliently mounted or self-shifting impeller...

Nonmetallic resilient mounting

416140, 416141, B64C 2738

Patent

active

042970784

ABSTRACT:
A helicopter rotor includes a rotor head arranged to support a plurality of rotor blades for rotation about an axis. The rotor head comprises a generally hollow structure, and each rotor blade is supported by an elastomeric bearing arranged to permit blade flap, lead/lag and feathering movements. A resilient support means is housed within the structure and is operatively associated with each rotor blade so as to provide controlled restraint of rotor blade movements in the blade flap plane. In the illustrated embodiment, the support means comprises interconnected inner and outer elastomeric assemblies, the outer assembly being connected to each rotor blade through a common elastomeric lead/lag damper unit which provides inter-blade damping of blade lead/lag movements. The outer elastomeric assembly also provides an automatic blade droop stop.

REFERENCES:
patent: 3759632 (1973-09-01), Rybicki
patent: 3764230 (1973-10-01), Rybicki et al.

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