Aeronautics and astronautics – Aircraft sustentation – Sustaining airfoils
Patent
1974-03-28
1976-11-30
Blix, Trygve M.
Aeronautics and astronautics
Aircraft sustentation
Sustaining airfoils
244 42DA, B64C 348
Patent
active
039944514
ABSTRACT:
A variable camber apparatus for the leading and/or trailing edge of an airfoil that is operable for lift variation at high airspeeds of a jet aircraft such as for maneuvering of fighter aircraft. The cambering apparatus comprises an upper surface flexible skin panel which is supported along its inner edge by a wing spar assembly and along its outermost edge, by an airfoil edge forming structure. A hinged rib member, through a kinematic linkage mechanism associated between itself and the structure at the outermost edge of the airfoil section, bends and torsionally twists the airfoil edge forming structure about a relative spanwise axis. The kinematic linkage mechanism is slaved to rotating means of the rib member, for torsionally twisting the outermost edge of the airfoil section, upper surface portion, the precise amount of rotation so as to flexuously bend the upper surface and thereby contour it to conform to an aerodynamically predetermined curvilinear plot that will produce the desired camber and the change in the lift characteristics of the airfoil surface.
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"Mechanization and Utilization of Variable Camber in Fightix and Attack Airplanes", Jan., 1973, K. K. Ishimitsu, D180-15377-1.
Barefoot Galen L.
Blix Trygve M.
Hartmann H. Gus
The Boeing Company
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