Rotor head for rotary wing aircraft

Details Rotor head for rotary wing aircraft Rotor head for rotary wing aircraft

1993-03-31

1995-04-18

Look, Edward K.

Fluid reaction surfaces (i.e., impellers)

Sustained ancillary movement of rotary working member

Lead-lag type rotor blade movement

416134A, 416140, B64C 2751

Patent

active

054073251

ABSTRACT:
A rotor head for a rotary wing aircraft having a plurality of rotor blades, such that each blade is coupled to the hub by an attachment assembly. The attachment assembly includes a thrust bearing device attached to the hub for allowing angular oscillations, and drag damping device coupled between the blade and the hub for damping movements of drag caused by rotation of the rotor head. The drag damping device has visco-elastic elements which are pivotable with respect to each other about a common axis. The damping device is also disposed to pivot in a flapping direction of the blade through a pivot joint.

REFERENCES:
patent: 2155427 (1939-04-01), Larsen
patent: 3967918 (1976-07-01), Mouille et al.
patent: 4304525 (1981-12-01), Mouille
patent: 4361415 (1982-11-01), Aubry
patent: 4738592 (1988-04-01), Cavanaugh
patent: 5141398 (1992-08-01), Bietenhader et al.

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