Aircraft

Details Aircraft Aircraft

1976-06-29

1978-10-24

Barefoot, Galen L.

Aeronautics and astronautics

Aircraft sustentation

Sustaining airfoils

244200, B64C 326

Patent

active

041217870

ABSTRACT:
A supercritical wing section having a large average leading edge radius of curvature, followed on the upper surface by a reduction in curvature and then a knee, or region of positively increased curvature, at between 3% and 13%, preferably 5% to 10%, chord the region of increased curvature being followed by a region of low curvature extending for 30% to 90% of the chord, whereby in use of the wing at low speeds the peak velocity and peak suction are contained, in use thereof at intermediate speeds local supersonic expansion is minimized, and in use thereof in supercritical conditions a region of high expansion, stabilized over the region of increased curvature, is created.

REFERENCES:
patent: 1571989 (1926-02-01), Zimmermann
patent: 1752378 (1930-04-01), Gobble
patent: 2426334 (1947-08-01), Banning, Jr.
patent: 3463418 (1969-08-01), Miksch
patent: 3952971 (1976-04-01), Whitcomb
Abbott et al., Theory of Wing Sections, p. 371 NACA 65.sub.2 A015 Airfoil Section, 1959.

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