Aeronautics and astronautics – Aircraft – heavier-than-air – Airplane sustained
Patent
1976-06-24
1977-09-27
Blix, Trygve M.
Aeronautics and astronautics
Aircraft, heavier-than-air
Airplane sustained
244 35R, 244200, 244 82, 244 76C, 244181, B64C 1316, B64C 310
Patent
active
040506517
ABSTRACT:
A thin, high performance swept wing of the tapered type with an improved leading edge characterized by (1) camber that increases from a minimum near the wing root to a maximum near the wing tip, and (2) substantially a constant leading edge radius extending substantially across the wing span which defines a "blunt" contour. The wing in combination with a T-tail aircraft with a stick shaker/pusher activated by a rate of change of angle of attack sensor and optionally a strake between the leading edge and a wing tip tank which intrinsically combine to define a system that enhances aircraft performance by reducing minimum airspeed without impairing aircraft performance at high subsonic Mach (M) numbers.
REFERENCES:
patent: 1948629 (1934-02-01), Pitts
patent: 2441758 (1948-05-01), Garbell
patent: 2985410 (1961-05-01), Richter et al.
patent: 3072369 (1963-01-01), Aderson
Welsh et al., "Effects of Some Leading-Edge Modifications . . . ", Jan. 18, 1955 NACA RM L54K01.
Graham et al., "Investigation of the Effects of an Airfoil Sec. Modification . . .", June 28, 1955 NACA RM A55 11.
Holdaway et al., "Investigation of Sym. Body Indentations . . . ", Mar. 19, 1957 NACA RM A56K26.
Nelson et al., "The Effects of Wing Profile on the Transonic Characteristics of . . . ", Oct. 27, 1954 NACA RM A54H12a.
Sandahl et al., "Effects of Some Section Modifications and Protuberances on the Zero-Lift . . . ", 2/18/54 NACA RM L53L24a.
Jane's All The World's Aircraft, edited by John Taylor, "Gates Learjet", 1974-1975, (received 4-25-75), pp. 338-341.
Evans, William T., "Leading-Edge Contours for Thin Swept Wings: An Analysis of Low- and High-Speed Data.", NACA RM A57B11, 3/29/57.
Miller, Mack, "The Gates Learjet Model 25" (a Pilot Report by Mack Miller), Flying, Feb. 1969.
James, Harry A., "Effects of Double-Slotted Flaps and Leading-Edge Modifications on the Low-Speed . . .", NACA RM A51D18, 7/23/51.
Maki, Ralph et al., "An Investigation at Subsonic Speeds of Several Modifications to the Leading-Edge . . . ", NACA TN 3871, Dec. 1956.
"Introducing the Howard/Raisbeck Mark II System", .COPYRGT. 1975.
Hein Joseph N.
Neal Ronald D.
Ross Richard
Barefoot Galen
Blix Trygve M.
Castleman, Jr. Curtis H.
Fink Raymond
Oberg, Jr. H. W.
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