Slotted cowl inlet lip for introducing high pressure air

Details Slotted cowl inlet lip for introducing high pressure air Slotted cowl inlet lip for introducing high pressure air

1994-07-19

1996-01-23

Kashnikow, Andres

Aeronautics and astronautics

Aircraft power plants

244207, 137875, 137885, 137486, 74 8917, B64D 2906

Patent

active

054859751

ABSTRACT:
The lower lip of an aircraft inlet cowl has a first transverse slot formed through an upper surface of the lower lip while a second transverse slot is formed through a lower surface of the lip. A rotating vane is transversely located in the interior of the lip, between the upper and lower slots. A duct located within the interior of the lower lip delivers pressurized engine bleed air to the rotating vane. Selectively driven gears position the vane so as to block either one or the other of the slots, depending upon aircraft speed, so that normal cowl inlet air is energized in the vicinity of the slot outlet. This prevents separation of the normal inlet airflow from the cowl surface - and reduces drag that would otherwise develop.

REFERENCES:
patent: 2624281 (1953-01-01), McNally
patent: 3063658 (1962-11-01), Griswold, II
patent: 3465988 (1969-09-01), Orr
patent: 4671318 (1987-06-01), Benson
patent: 4872360 (1989-10-01), Lew et al.

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