B - Operations – Transporting – 64 – C
Patent
B - Operations, Transporting
64
C
244/6
B64C 29/00 (2006.01)
Patent
CA 1082156
ABSTRACT OF THE DISCLOSURE Augmentation of aerodynamic lift for a given amount of power in STOL operation of a V/STOL aircraft is achieved by combining the unique features of a lifting body with those of a "jet flap", i.e. an aerodynamic mechanism in which a slipstream is directed over a deflected flap. Specifically, a movable flap is located on the trailing edge of the lifting body, and a tiltable rotating blade propeller, which propels the aircraft in the normal manner in cruising, may be tilted, in low-speed flight, in order to direct air toward the leading edge of the flap and over the upper surface thereof. The movement of a large mass of air at a higher velocity over the upper surface of the flap maintains the air flow over the flap in an attached condition, and entrains and energizes the lower-velocity boundary layer on the airfoil forward of the flap, thereby producing an augmentation in lift. As the trailing edge of the lifting body is located well behind the aircraft's center of gravity, the lifting body makes it possible for a conventional rotating blade propeller to be used efficiently and effectively to produce the jet flap effect. The lifting body also lends itself especially to lift augmentation in that, for a given lifting surface area, the low aspect ratio of the lifting body gives rise to a much greater lift augmentation than would be afforded by a high aspect ratio surface,
287874
Aereon Corporation
Gowling Lafleur Henderson Llp
LandOfFree
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