Individual blade control

Details Individual blade control Individual blade control

1980-10-07

1983-04-12

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

Sustained ancillary movement of rotary working member

416 31, 416158, B64C 2774

Patent

active

043796788

ABSTRACT:
Individual blade control of a helicopter rotor is accomplished by rotation of a mast (10) about a standpipe (12) where an individual blade (16) is coupled to the mast through a hub (18). Pilot input signals are transmitted by fly-by-optic transmission lines (14) through a fiber optic slip ring (40,42) to signal generators (134, 136, 138) for each of three sections of triplex actuators (76-79) coupled to individual rotor blades. Hydraulic fluid for positioning each of the actuators (76-79) is provided by electrohydraulic power packages (88, 90 and 92) where each package includes a pump and alternator. As each blade rotates about the mast (76) the pitch angle changes by individualizing the output of the signal generators (134-138) for each actuator.

REFERENCES:
patent: 2491260 (1949-12-01), Green
patent: 3227221 (1966-01-01), You
patent: 3256780 (1966-06-01), Riley et al.
patent: 3767323 (1973-10-01), Zech
patent: 4027999 (1977-06-01), Durno
patent: 4243358 (1981-01-01), Carlock et al.
patent: 4274808 (1981-06-01), Garner
patent: 4348155 (1982-09-01), Barnes et al.

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