Aeronautics and astronautics – Aircraft sustentation – Sustaining airfoils
Patent
1978-08-28
1980-12-23
Barefoot, Galen L.
Aeronautics and astronautics
Aircraft sustentation
Sustaining airfoils
244198, 244199, B64C 314
Patent
active
042405971
ABSTRACT:
A thin, high performance swept wing of the tapered type with an improved leading edge characterized by a first portion that extends from near the wing root at a fixed radius to a transition point where twice the fixed radius does not exceed about 100.6 percent of wing thickness at about 5 percent of the local chord at the transition point, and a second leading edge portion extending from the transition point to the wing tip that has a radius expressed in percent of local chord which does not exceed that percent of local chord at the transition point. Winglets are optionally provided in combination with the wing with improved leading edge to provide in combination, improved aircraft performance.
REFERENCES:
patent: 3659810 (1972-05-01), Robertson
patent: 4032087 (1977-06-01), Cleaves
patent: 4050651 (1977-09-01), Neal et al.
Whitcomb, "A Design Approach . . . for Wing-Tip Mounted Winglets", NASA TN 8260, 7/1976.
Ishimitsu et al., "Design Analysis of Winglets for Military Aircraft", AFFDL-7R-76-6, 2/1976.
Evans, "Leading Edge Contours for Thin Swept Wings", NACA RM A57B11, 3/1957.
Hickey et al., "Large-Scale Wind-Tunnel Tests . . .", NACA RM A58A09, 5/1958.
Conley Norman E.
Ellis Roger R.
Gertsen W. Marvin
Barefoot Galen L.
Castleman, Jr. Curtis H.
Fink Raymond
Gates Learjet Corporation
Oberg, Jr. H. W.
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