Aeronautics and astronautics – Aircraft – heavier-than-air – Airplane and fluid sustained
Patent
1976-10-01
1979-04-17
Barefoot, Galen L.
Aeronautics and astronautics
Aircraft, heavier-than-air
Airplane and fluid sustained
244 25, 244 36, 244 56, B64C 2100
Patent
active
041496884
ABSTRACT:
An unexpectedly high 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 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. The lifting body 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.
REFERENCES:
patent: D188226 (1960-06-01), Jones et al.
patent: 1855652 (1932-04-01), Sanders
patent: 2380535 (1945-07-01), McDevitt
patent: 2964264 (1960-12-01), Multhopp
patent: 3029042 (1962-04-01), Martin
patent: 3115317 (1963-12-01), Merrick
patent: 3179354 (1965-04-01), Alvarez-Calderon
patent: 3181810 (1965-05-01), Olson
patent: 3761041 (1973-09-01), Putman
patent: 3829044 (1974-08-01), Leslie et al.
McE. Miller et al., "The Lifting Body Airship", Canadian Aero and Space Journal, pp. 23-29, Jan. 1976.
Dornier, U.S. Published Serial No. 265,721, 7-1943.
Aereon Corporation
Barefoot Galen L.
Smith, Jr. George A.
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