Aeronautics and astronautics – Aircraft – heavier-than-air – Airplane and auto-rotating wing sustained
Patent
1994-04-11
1996-08-13
Kashnikow, Andres
Aeronautics and astronautics
Aircraft, heavier-than-air
Airplane and auto-rotating wing sustained
244 1711, 244 1719, 244 1727, B64C 2702
Patent
active
055448445
ABSTRACT:
An autogyro has a teetering semi-rigid rotary wing with rigid rotor blades. The angle of attack (blade pitch) of the rotor blades is fully adjustable in flight continuously over an operational range, and varies along the blade length. A prerotator rotates the rotor blades up to takeoff speed at minimum drag, no lift and optimum engine efficiency. Engine power is disconnected from the rotor blades and their angle of attack is changed for optimum lift to facilitate smooth vertical takeoff. Rotor blade pitch is likewise adjusted during vertical landing. In flight, rotor blade angle of attack is varied to adjust autorotation, lift and drag at any flight airspeed. On the ground, the rotary wing is braked to prevent rotation.
The autogyro may roll, pitch, or yaw, with complete independence of blade pitch with respect to all other relative motions. The pedals have disproportionate forward and backward motions. The autogyro has retractable gear capable of fail-safe gear-up landing.
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Groen David L.
Groen Henry J.
Broadbent Berne S.
Kashnikow Andres
Mojica Virna Lissi
Pate A. John
Pierce Gary D. E.
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