Aeronautics and astronautics – Aircraft power plants – Arrangement
Patent
1986-03-26
1986-12-16
Barefoot, Galen
Aeronautics and astronautics
Aircraft power plants
Arrangement
244130, B64D 2702
Patent
active
046291474
ABSTRACT:
This invention is an aircraft 10 with a system for increasing the lift-drag ratio over a broad range of operating conditions. The system positions the engines and nacelles 15 over the wing 12 in such a position that gains in propeller 16 efficiency is achieved simultaneously with increases in wing lift and a reduction in wing drag. Adverse structural and torsional effects on the wings 12 are avoided by fuselage mounted pylons which attach to the upper portion of the fuselage 11 aft of the wings. Similarly, pylon-wing interference is eliminated by moving the pylons to the fuselage. Further gains are achieved by locating the pylon surface area aft of the aircraft center-of-gravity, thereby augmenting both directional and longitudinal stability. This augmentation has the further effect of reducing the size, weight and drag of empennage components 13. The combination of design changes results in improved cruise performance and increased climb performance while reducing fuel consumption and drag and weight penalties.
REFERENCES:
patent: 1990606 (1935-02-01), Sunkers
patent: 3188025 (1965-06-01), Moorehead
Popular Science, "Future Commuter", Feb. 1983.
Johnson, Jr. Joseph L.
White E. Richard
Barefoot Galen
Manning John R.
Nelson Wallace J.
Osborn Howard J.
The United States of America as represented by the Administrator
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