Variable cross-section turbofan exhaust duct with door type thru

Details Variable cross-section turbofan exhaust duct with door type thru Variable cross-section turbofan exhaust duct with door type thru

1998-06-12

1999-12-07

Barefoot, Galen L.

Aeronautics and astronautics

Retarding and restraining devices

Friction brakes

23926519, 23926517, 23936531, 602262, F02K 109, F02C 302

Patent

active

059969377

ABSTRACT:
A variable turbofan bypass cowling includes a movable cowling assembly (12) with pivoting door type thrust reversers (20) connected to a fixed upstream cowling structure (11). The movable assembly may be translated between an upstream position whereat an upstream portion of the reverser and cowling assembly (12) is housed inside an enclosure formed by the upstream cowling structure (11) and a downstream position whereat the assembly (12) effects a variation in the exhaust duct (17) cross-section between an inner primary turbojet-engine cowling (15) and a radially inner wall of the assembly (12). The reverser doors (20) in their closed position are integrated into the cowling wall and contain at least part of the exhaust flow. When pivoted to thrust reversed positions following translation of the assembly (12) to a downstream rearward position, thrust reversal is provided in the usual manner.

REFERENCES:
patent: 3280562 (1966-10-01), Theits
patent: 3605411 (1971-09-01), Maison et al.
patent: 3779010 (1973-12-01), Chamay et al.
patent: 3981451 (1976-09-01), Prior et al.
patent: 4823547 (1989-04-01), Newton
patent: 5778659 (1998-07-01), Duesler et al.
patent: 5853148 (1998-12-01), Standish et al.

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