Helicopters

Details Helicopters Helicopters

1980-03-24

1982-09-07

Barefoot, Galen L.

Aeronautics and astronautics

Aircraft, heavier-than-air

Helicopter or auto-rotating wing sustained, i.e., gyroplanes

244 1721, 244 1713, 416123, 416130, B64C 2782

Patent

active

043479979

ABSTRACT:
A helicopter including a power absorber arranged to selectively absorb power from a sustaining rotor system during deceleration. In an illustrated embodiment for a helicopter having a single sustaining rotor, the power absorber comprises a tail rotor assembly having two tail rotors located one on each side of a tail cone, and a control operative to adjust the pitch setting of the tail rotors to provide lateral thrust forces in opposed directions with a net lateral thrust force in one direction in order to maintain a desired heading during deceleration.

REFERENCES:
patent: 1635897 (1927-07-01), Nelson
patent: 1964179 (1934-06-01), Roth et al.
patent: 2130918 (1938-09-01), De Stefano
patent: 2225002 (1940-12-01), Focke
patent: 2420784 (1947-05-01), Larson
patent: 2699833 (1955-01-01), Jensen
patent: 2702084 (1955-02-01), Focke
patent: 2733878 (1956-02-01), Ciscel
patent: 3426982 (1969-02-01), Markwood
patent: 3540680 (1970-11-01), Peterson

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