Single-rotor helicopter having a compound anti-torque system, an

Details Single-rotor helicopter having a compound anti-torque system, an Single-rotor helicopter having a compound anti-torque system, an

1993-03-19

1995-02-14

Barefoot, Galen L.

Aeronautics and astronautics

Aircraft, heavier-than-air

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

244 7R, B64C 2782

Patent

active

053887859

ABSTRACT:
A helicopter comprising: a single main rotor for forwards motion and for support; and an anti-torque system comprising: an auxiliary, anti-torque rotor rotated from the engine means of said main rotor and exerting controllable anti-torque lateral thrust; and at least one steering airfoil that is controllable in steering and that generates anti-torque transverse lift. According to the invention, the helicopter includes automatic swivel control means for automatically controlling the swivel angle of said steering airfoil as a function of the collective pitch angle of said main rotor and of the forward speed of said helicopter.

REFERENCES:
patent: 2581396 (1952-01-01), Erickson
patent: 4947334 (1990-08-01), Massey et al.
patent: 5131604 (1992-07-01), Yoerkie et al.
patent: 5214596 (1993-05-01), Muller
EP 000524044, Allongue Jan. 20, 1993.

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