Aeronautics and astronautics – Aircraft sustentation – Sustaining airfoils
Patent
1977-05-23
1979-03-27
Barefoot, Galen L.
Aeronautics and astronautics
Aircraft sustentation
Sustaining airfoils
B64C 2106
Patent
active
041462025
ABSTRACT:
A porous aircraft skin for wetted areas of an aircraft employed in conjunction with a suction system of the aircraft to draw air inwardly through pores of said skin for laminar flow control. The porous skin is compliant and includes a thin outer skin with fine pores bonded to a lower substantially thicker coarser pore compliant skin with the thicker skin in turn bonded to the structural skin of the aircraft. Vacuum chambers beneath the aircraft structural skin receive air sucked through the porous compliant skin and through communicating holes of the structural skin. One-way valves of flexible or semi-flexible material are inserted into the suction holes of the aircraft structural skin prior to the placement of the porous compliant skin. Low pressure above the aircraft lifting surfaces automatically closes the one-way valves thereby maintaining low pressure above the lifting surfaces and preventing reverse flow from destroying the lift afforded by said surfaces.
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Barefoot Galen L.
Fishburne, Jr. B. P.
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