Aeronautics and astronautics – Aircraft sustentation – Sustaining airfoils
Patent
1992-12-21
1994-02-01
Tyson, Karin L.
Aeronautics and astronautics
Aircraft sustentation
Sustaining airfoils
244198, 244218, 244 49, B64C 2306
Patent
active
052825914
ABSTRACT:
An on-demand wing vortex control system includes a pair of retractable pas which extend forward through slots in the leading edges of the strake and main wing at their junction. When not in use, the device is retracted in a stowed position, thus having zero impact on the cruise efficiency and observability characteristics designed into the aircraft. The panels extend forward from the strake and wing, providing an added leading edge airfoil surface when in the deployed position. Both panels are slideably and rotatably affixed to the aircraft. A front panel is affixed to and supported within the strake, while a rear panel is affixed and supported within the main wing. The planform of each panel is symmetrically identical, and the movements of the panels are mechanically coordinated so that the exposed planform shape represented by the combined overlapping panels are symmetrical about a line which bisects the strake/wing junction angle. The panels may be deployed in a variety of positions which control the strength and location of the vortex and its burst point as it is shed over the wing, thereby altering the lift on the aircraft.
REFERENCES:
patent: 3456905 (1969-07-01), Bielefeldt
patent: 3572617 (1971-03-01), Ricard
patent: 3645477 (1972-02-01), Kratschmar et al.
patent: 4132375 (1979-01-01), Lamar
patent: 4267990 (1981-05-01), Staudacher
patent: 4738479 (1988-04-01), Filtri et al.
patent: 4739957 (1988-04-01), Vess et al.
Kern Steven B.
Walters Marvin M.
Bechtel James B.
Ellis Christopher P.
The United States of America as represented by the Secretary of
Tura James V.
Tyson Karin L.
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