Aeronautics and astronautics – Aircraft – heavier-than-air – Airplane and fluid sustained
Patent
1986-12-02
1988-02-23
Barefoot, Galen
Aeronautics and astronautics
Aircraft, heavier-than-air
Airplane and fluid sustained
244 23B, 244 52, 244 23D, 244 125, B64C 1502, B64C 2900
Patent
active
047265450
ABSTRACT:
By mounting a lift engine and a lift/cruise engine closely to the center of gravity of an aircraft and by orienting the respective engines such that the thrust axes thereof are arranged for ensuring that the vector sum of the lift engine thrust and the lift/cruise engine thrust pass through the center of gravity at all times, a fuel efficient aircraft can controllably takeoff and land vertically. To provide for vectoring the thrust of the respective engines, different nozzles are provided. Further, to provide for pitch, roll and yaw control, a vane assembly is coupled to the aircraft in such a way that it remains in alignment to the jet stream of the lift engine.
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"Grumman Studying RPV Concept for Naval Fleet Surveillance", Aviation Week & Space Technology, Aug. 4, 1986.
Barefoot Galen
Grumman Aerospace Corporation
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