Drag-reducing component

Details Drag-reducing component Drag-reducing component

1979-08-31

1982-02-09

Frankfort, Charles E.

Aeronautics and astronautics

Aircraft power plants

Mounting

244130, 244200, B64D 2700, B64C 2110

Patent

active

043146813

ABSTRACT:
A drag-reducing structure is provided on a pylon that suspends a wing-mounted engine. The structure reduces drag by preventing ambient airflow, in a region between the wing, pylon, and engine, from accelerating to supersonic velocities and causing shock waves resulting in excessive drag. In one embodiment, the structure is a broad fairing on the inboard vertical surface of the pylon. In another embodiment, the structure is a tapered bump mounted at the inboard intersection between the wing and pylon.

REFERENCES:
patent: 2967030 (1961-01-01), Whitcomb
patent: 2990142 (1961-06-01), Ferri
patent: 3533237 (1970-10-01), Rabone et al.
patent: 3765623 (1973-10-01), Donelson et al.
patent: 3806067 (1974-04-01), Kutney
"Citation 500 Mod by Astec: #170G's," NBAA Convention News, Sep. 27, 1977.

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