Aeronautics and astronautics – Aircraft sustentation – Sustaining airfoils
Patent
1975-03-31
1976-03-02
Blix, Trygve M.
Aeronautics and astronautics
Aircraft sustentation
Sustaining airfoils
244 44, B64C 924
Patent
active
039413349
ABSTRACT:
A variable camber apparatus for the leading 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 the actuator 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. Further, the combination of a variable camber wing leading edge mechanism with a high lift device, such as a leading edge flap, which is stowed within the airfoil envelope.
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Barefoot Galen L.
Blix Trygve M.
Donahue B. A.
Hartmann H. Gus
Orlob Glenn
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