Aeronautics and astronautics – Aircraft sustentation – Sustaining airfoils
Patent
1997-11-13
1999-03-30
Barefoot, Galen L.
Aeronautics and astronautics
Aircraft sustentation
Sustaining airfoils
244219, 244 90R, B64C 918
Patent
active
058878289
ABSTRACT:
An airfoil is provided with a seamless control surface which comprises upper and lower skins fixed to a spanwise extending spar and extending chordwise to a trailing edge and having an outer surface which is substantially a continuation of the upper and lower surfaces of the airfoil. A joint mechanism proximately attaches together the bailing edges of the upper and lower skins while permitting relative chordwise movement therebetween. Actuating devices are operable for selectively altering the curvature of the upper and lower skins to cause deflection of the seamless control surface between an extreme raised position through a neutral position to an extreme lowered position. In this manner, the outer surface curvature of the airfoil and of the seamless control surface is smooth and continuous over substantially the entirety thereof at all positions of the seamless control surface. The actuating devices may be hydraulic, pneumatic, or solid state and the upper and lower skins may be of composite material.
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Anderson Terry J.
Barefoot Galen L.
Hoch Jr. Karl J.
Northrop Grumman Corporation
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