Aeronautics and astronautics – Aircraft – heavier-than-air – Airplane sustained
Patent
1981-10-02
1988-11-01
Barefoot, Galen
Aeronautics and astronautics
Aircraft, heavier-than-air
Airplane sustained
244 35R, 244199, 244903, 244 45R, 244 36, B64C 314, B64C 3910
Patent
active
047813415
ABSTRACT:
An ultralight aircraft having a generally rectangular, swept-back, single-surface wing. The wing, which is formed by fabric mounted on exposed spars and ribs, has a reflex profile to provide pitch stability which is further augmented by horizontal stabilizers projecting rearwardly from the wing adjacent the tips. Roll and yaw control are provided by a pair of rudders pivotally mounted at each wing tip. The forward ends of the rudders pivot inwardly to alter the magnitude of the wing's lift. The rudders pivoted simultaneously act as spoilers and speed brakes controlling the rate of descent. Pivoting one of the rudders individually moves the center of lift for one wing inwardly and increases the drag of that wing to roll the aircraft into that wing. The rudders tilt upwardly and outwardly in a dihedral configuration to provide roll stability. Stationary end plates mounted at each wing tip adjacent the rudders provide yaw stability. The aircraft utilizes a single surface wing so that it can descend safely at zero forward speed in a parachute-like manner. Pitch control is made by shifting the pilot's body forward and back. A chassis mounted beneath the wing supports a pilot and a gasoline engine driving a pusher propeller.
REFERENCES:
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patent: 1022903 (1912-04-01), Warrick
patent: 1325137 (1919-12-01), Brooke
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patent: 1915055 (1933-06-01), Fauvel
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patent: 4206892 (1980-06-01), MacCready, Jr. et al.
patent: 4245804 (1981-01-01), Ishimitsu et al.
patent: 4262863 (1981-04-01), Slusarczyk
patent: 4372506 (1983-02-01), Cronk et al.
"Manta Products", Bill Pregler, Hang Gliding Magazine, pp. 52-53, May 1978.
Barefoot Galen
Secrest Thomas W.
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