Aeronautics and astronautics – Aircraft – heavier-than-air – Helicopter or auto-rotating wing sustained – i.e. – gyroplanes
Patent
1992-11-06
1995-08-01
Focarino, Margaret A.
Aeronautics and astronautics
Aircraft, heavier-than-air
Helicopter or auto-rotating wing sustained, i.e., gyroplanes
244 1N, 244199, B64C 2700
Patent
active
054374197
ABSTRACT:
Blade-vortex interaction noises, sometimes referred to as "blade slap", are avoided by increasing the absolute value of inflow to the rotor system of a rotorcraft. This is accomplished by creating a drag force which causes the angle of the tip-path plane of the rotor system to become more negative or more positive.
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Ellis Christopher P.
Focarino Margaret A.
Mannix John G.
Miller Guy M.
The United States of America as represented by the United States
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