Aeronautics and astronautics – Aircraft sustentation – Sustaining airfoils
Patent
1985-11-02
1989-03-21
Barefoot, Galen
Aeronautics and astronautics
Aircraft sustentation
Sustaining airfoils
244209, B64C 314
Patent
active
048136310
ABSTRACT:
A laminar flow control aircraft wing combines suction surfaces and slots in its leading and trailing edge regions, with natural laminar flow over its main box region to achieve laminar boundary layer flow over a majority of the wing surface area. The wing includes a leading edge flap that is used to protect the leading edge region of the wing from insect accumulation and surface erosion caused by the impact of dirt, rain, or other airborne materials when the leading edge flap is deployed in a low-speed position. At high aircraft speeds, the leading edge flap is stored in the surface of the leading edge region of the wing and forms part of the suction system for that area of the wing. The wing also includes a flexible trailing edge suction surface spoiler system that allows the spoilers to bend either upwardly for lateral control or downwardly when the trailing edge flap is deployed into a low-speed position.
REFERENCES:
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patent: 2988302 (1961-06-01), Smith
patent: 3617018 (1971-11-01), Baetke
patent: 3941334 (1976-03-01), Cole
patent: 3951360 (1976-04-01), Anxionnaz
patent: 4121787 (1978-10-01), Wilby
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patent: 4395450 (1983-07-01), Whitener
patent: 4455003 (1984-06-01), Hilbig
patent: 4575030 (1986-03-01), Gratzer
Aerospace America, vol. 22, No. 3, Mar. 1984, pp. 72-76, Wagner et al.
Journal of Aircraft, vol. 21, No. 8, Aug. 1984, pp. 612-617, Lange.
Barefoot Galen
The Boeing Company
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