Drag operated rotor pitch adjustment system for gyroplanes

Details Drag operated rotor pitch adjustment system for gyroplanes Drag operated rotor pitch adjustment system for gyroplanes

1985-09-17

1988-02-23

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

Having positive means for impeller adjustment

Power derived from impeller shaft

416160, B64C 2756

Patent

active

047267364

ABSTRACT:
A drag operated collective pitch control system is provided for gyroplane rotary wing aircraft. The system employs drag surfaces which are selectively engaged while the hub is rotating to actuate the system. Each blade mount is provided with a feathering pivot. Pinion gears control the pitch of each blade, and the pinions, mounted on the hub, are engaged by a pair of ring gears, also carried on the hub. To operate the system, either one or the other of the ring gears, to which the drag surfaces are coupled, is engaged by suitable drag means. The pitch of all the blades is thereby adjusted simultaneously.

REFERENCES:
patent: 1447080 (1923-02-01), Heath
patent: 1719953 (1929-07-01), Wiegand
patent: 1964102 (1934-06-01), Wishon
patent: 2108660 (1938-02-01), Farrell
patent: 2384780 (1945-09-01), Dietrich
patent: 2423400 (1947-07-01), Nichols
patent: 2491260 (1949-12-01), Green
patent: 2648387 (1953-08-01), Doman
patent: 3879153 (1975-04-01), Breuner
patent: 4534524 (1985-08-01), Aldrich

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