Aeronautics and astronautics – Aircraft sustentation – Sustaining airfoils
Patent
1979-01-26
1983-06-28
Barefoot, Galen L.
Aeronautics and astronautics
Aircraft sustentation
Sustaining airfoils
244 15, 244 13, B64B 300
Patent
active
043901506
ABSTRACT:
A tandem wing aircraft having two wings of similar area wherein a lower first wing is located at the forward end of the fuselage attached directly to fuselage structure. A second higher wing is located at the aft end of the fuselage but is aerodynamically separated from the fuselage structure by strut structure. Pitch control is achieved by increasing or decreasing the lift on either wing; but downward acting load is not required. The two wings are preferably vertically separated by 25% to 50% of the span of the wings. Control redundancy for flight safety is achieved because of availability and location of control surfaces. Higher aspect ratio wings can be used because of inherently reduced bending moments on the wing; and overall aircraft gross weight is reduced due to structural and aerodynamic efficiency.
REFERENCES:
patent: D234079 (1975-01-01), Whitener
patent: 1492262 (1924-04-01), Peyret
patent: 2151128 (1939-03-01), Looney
patent: 3159361 (1964-12-01), Weiland
patent: 3244246 (1966-04-01), Welland
patent: 3347498 (1967-10-01), Priestley et al.
patent: 3358946 (1967-12-01), Shye
patent: 3438306 (1969-04-01), Kazmarek
patent: 3734432 (1973-05-01), Low
patent: 3834654 (1974-09-01), Miranda
Barefoot Galen L.
Donahue Bernard A.
Savage Laurence A.
The Boeing Company
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