Aeronautics and astronautics – Aircraft – heavier-than-air – Fluid sustained
Patent
1975-09-09
1978-01-31
Blix, Trygve M.
Aeronautics and astronautics
Aircraft, heavier-than-air
Fluid sustained
180118, 180120, 244 125, 244 83G, B60V 111, B64C 1506
Patent
active
040712079
ABSTRACT:
A wingless vertical take-off aircraft having multiple ducted propeller rotors with controllable pitch blades symmetrically mounted in the forward and the rear portions and on both sides of the aircraft with the ducts angled downwardly at an acute angle to the aircraft longitudinal axis, transversely extending deflector vanes pivotable vertically within the exit portion of the ducts, and a rudder for yaw control mounted in the exit portion of each rearwardly located duct. Control in altitude and in attitude about the pitch and roll axes is achieved by controlling the collective pitch of the propellers in selected ducts with the roll control being interconnected to the yaw control to counteract roll/yaw coupling effects and control in trim and forward flight thrust being provided by setting the position of the deflector vane to divert the air flow from the ducts in variable directions with respect to the aircraft axis and the vertical.
REFERENCES:
patent: 2929580 (1960-03-01), Ciolkosz
patent: 2940698 (1960-06-01), Lawrence et al.
patent: 3008524 (1961-11-01), Kaplan
patent: 3486577 (1969-12-01), Jackes
Meyers Donald N.
Piasecki Frank N.
Blix Trygve M.
Kelmachter Barry L.
Piasecki Aircraft Corporation
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