Claims
- 1. A helicopter rotor system for a helicopter having a rotorshaft (18), a hub member (28) that is freely tiltable about a point (P) on the rotorshaft axis, and blades (12) that are radially attached to the hub member (28) in a rotor plane that nominally intersects the rotorshaft axis at a point (Q), which is above the point (P), characterized by:
- a plurality of long flat compound springs (70) for providing a hub moment, each compound spring having an outward spring (72) attached at its inboard end to the rotorshaft in-plane with the point (P), and an inward spring (74) attached at its inboard end to the hub member 28 in-plane with the point (P); and
- a joint for pivotally connecting the outboard ends of the outward and inward springs while allowing for foreshortening therebetween in a direction radial to the rotorshaft.
CROSS REFERENCE TO RELATED APPLICATIONS
The government has rights in this invention pursuant to Contract No. DAAK51-83-C-0010 awarded by the Department of the Army.
Cross reference is made herein to copending, commonly-owned U.S. patent application Ser. No. 655,386, filed Sept. 27, 1987, entitled HELICOPTER GIMBAL ROTOR, filed on even date herewith by Miller and U.S. patent application Ser. No. 655,385, filed Sept. 27, 1984, entitled HELICOPTER GIMBAL ROTOR, filed on even date herewith by Miller.
US Referenced Citations (11)
Foreign Referenced Citations (5)
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