Variable airfoil assembly

Details Variable airfoil assembly Variable airfoil assembly

1978-06-09

1980-01-08

Kelmachter, Barry L.

Aeronautics and astronautics

Aircraft sustentation

Sustaining airfoils

244113, 244218, B64C 348, B64C 932

Patent

active

041825039

ABSTRACT:
The present variable airfoil assembly has an adjustable airfoil member pivotally mounted in the top of a fixed airfoil member for adjustment between a fully lowered position (for minimum wind resistance) and different raised positions in which it projects up above the top surface of the fixed airfoil member to control the lift and drag. A minimum clearance between the fixed and adjustable airfoil members is provided at the front end of the adjustable airfoil member over a range of its pivotal adjustments. The variable airfoil assembly is capable of increasing the lift of the airfoil, then lowering stalling speed, and it may either replace flaps or be used in conjunction with flaps. Higher cruise speeds can be achieved as well as good low speed performance.

REFERENCES:
patent: 1828161 (1931-10-01), Suchofsky
patent: 2317267 (1943-04-01), Gazda
patent: 4007896 (1977-02-01), Reynolds

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