Propulsion system for a V/STOL airplane

Details Propulsion system for a V/STOL airplane Propulsion system for a V/STOL airplane

1978-12-29

1981-11-24

Frankfort, Charles E.

Aeronautics and astronautics

Aircraft, heavier-than-air

Airplane and fluid sustained

244 23D, 244 55, 244216, B64C 2900

Patent

active

043019803

ABSTRACT:
A propulsion system for an airplane to permit it to achieve vertical and/or short take-offs and landings. The propulsion system is integrated into a wing
acelle unit and includes a thrust vectoring system. A separate flow turbofan engine is mounted in each wing
acelle unit. A system of three flaps is located at the rear of each wing
acelle unit for deflecting the turbofan engine exhaust downward, rearward, or any angle in between. These three flaps are arranged to provide a main thrust nozzle in the horizontal flight position without any additional flaps between them. One flap is located at the wing
acelle upper surface trailing edge. Two slots are provided at the leading edge of this flap. The upper forward most slot is provided as an exit nozzle for the engine turbine exhaust, which is shrouded from the fan exhaust. The second of these two slots removes a portion of the high energy fan exhaust from the fan discharge duct and ejects it over a flap upper surface. The other two flaps are positioned such that, in the horizontal position they are both aligned with the wing
acelle lower surface and in the vertical position, one is aligned with the wing
acelle lower surface and the other is aligned with the wing
acelle upper surface. When the flaps are in the vertical position, the aft most slot in the upper flap and a slot formed between the upper flap and the lower aft flap provide a means of improving the turning efficiency of the fan exhaust stream.

REFERENCES:
patent: 2879957 (1959-03-01), Lippisch
patent: 3330500 (1967-07-01), Winborn
patent: 3397854 (1968-08-01), Reyle

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