Supercritical air-foil profile

Details Supercritical air-foil profile Supercritical air-foil profile

1978-03-20

1984-06-19

Barefoot, Galen L.

Aeronautics and astronautics

Aircraft sustentation

Sustaining airfoils

B64C 314

Patent

active

044550030

ABSTRACT:
The supercritical profile has an upper surface whose curvature has two minima, one in front of the mid-chord station, the other one rather close to the trailing edge and having a lower value than the first one. The curvature of the lower surface remains larger beyond the mid-chord station, changes sign and increases to a pronounced maximum not far from the second curvature minimum of the upper surface, and drops to zero at the trailing edge.

REFERENCES:
patent: 3952971 (1976-04-01), Whitcomb
patent: 4072282 (1978-02-01), Fulker et al.
Boerstoel, "Sym. Subsonic Potential Flows Around Quasi-Elliptical Aerofoil Sections," NLR TR 68016V, Mar., 1968.
Kacprzynski et al., "Wind Tunnel Tests of a Shockless Lifting Airfoil," No. 1, NAE Report #5.times.5/0054, Aug., 1971.
Arlinger, "An Exact Method of Two-Dimensional Airfoil Design," SAAB Technical Notes, SAAB TN 67, Oct., 1970.

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