Rag control for powered lift aircraft

Details Rag control for powered lift aircraft Rag control for powered lift aircraft

1983-09-28

1990-01-23

Barefoot, Galen

Aeronautics and astronautics

Aircraft sustentation

Sustaining airfoils

244207, B64C 924

Patent

active

048953237

ABSTRACT:
A wing (2) has a trailing edge at which jet flow is deflected downwardly to provide lift. A retractable member (4, 4') has a sharp forward edge (6, 6'). When deployed, member (4, 4') extends along at least a portion of the span (preferably substantially the entire span) of the wing (2) at the leading edge of wing (2). Member (4, 4') projects forwardly and upwardly from wing (2). Member (4, 4') causes flow around wing (2) rearwardly of itself to separate from wing (2) to reduce suction and leading edge thrust. Preferably, reattachment of flow is induced at a location spaced rearwardly from member (4, 4'). A jet of high velocity gas is blown along wing (2) in a generally spanwise direction. This induces reattachment to maintain trailing edge thrust so that jet deflection at the trailing edge will efficiently provide lift during a short distance landing.

REFERENCES:
patent: 1880019 (1932-09-01), Harper
patent: 2070705 (1937-02-01), Barnhart
patent: 2868480 (1959-01-01), Attinello
patent: 2894703 (1959-07-01), Hazen et al.
patent: 3480234 (1969-11-01), Cornish, III
patent: 4293110 (1981-10-01), Middleton et al.

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