Air foil having adjustable shape

Details Air foil having adjustable shape Air foil having adjustable shape

1985-02-15

1986-04-15

Barefoot, Galen L.

Aeronautics and astronautics

Aircraft sustentation

Sustaining airfoils

B64C 346

Patent

active

045822786

ABSTRACT:
An airfoil with an adjustable aerodynamic shape for lowering the landing speed of high performance aircraft. A thin secondary skin is applied to the top primary skin of the aircraft's wing surface. Pressurized fluid is introduced to the cavity formed between the primary skin and the secondary skin to cause a rounding of the upper surface of the airfoil in conjunction with lowering of leading and trailing edge flaps. A plurality of contour members of predetermined lengths and at spaced locations connect the secondary skin and upper surface of the primary skin so as to define the particular contour desired. The leading edge of the secondary skin is hinged to the forward spar of the airfoil. One or more actuators acting through a linkage apply tension to the trailing edge of the secondary skin and draw it down into contiguous relationship with the primary skin of the wing surface for high speed operation.

REFERENCES:
patent: 3447768 (1969-06-01), McQueen

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