Power plants – Reaction motor – Interrelated reaction motors
Patent
1996-08-09
1997-08-12
Thorpe, Timothy
Power plants
Reaction motor
Interrelated reaction motors
60262, 60232, 244110B, 23926531, 23926529, F02K 302
Patent
active
056553609
ABSTRACT:
A thrust reverser is provided for both modulating and reversing bypass flow discharged from a fan through a bypass duct of a turbofan gas turbine engine. The reverser includes an aft cowl joined to a forward cowl and having an aft end surrounding a core engine to define a discharge fan nozzle of minimum flow throat area. The aft cowl is axially translatable relative to the forward cowl from a first position fully retracted against the forward cowl, to a second position partially extended from the forward cowl, and to a third position fully extended from the forward cowl. A plurality of cascade turning vanes are disposed between the forward and aft cowls, and a plurality of thrust reversing deflector doors are pivotally mounted to the aft cowl and bound the bypass duct. The deflector doors are selectively deployed from a stowed position corresponding with the first and second positions of the aft cowl for allowing unrestricted flow of the bypass flow through the fan nozzle. The doors also have a deployed position corresponding with the third position of the aft cowl for substantially deflecting the bypass flow from discharging through the fan nozzle to discharging through the cascade vanes for effecting thrust reverse. Axial translation of the aft cowl between the first and second positions varies flow area of the fan nozzle to vary thrust effected by the discharged bypass flow.
REFERENCES:
patent: 3333772 (1967-08-01), Bruner
patent: 3503211 (1970-03-01), Medawar et al.
patent: 3665709 (1972-05-01), Medawar et al.
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patent: 3829020 (1974-08-01), Stearns
patent: 4278220 (1981-07-01), Johnston et al.
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patent: 4716724 (1988-01-01), Newton
patent: 4922713 (1990-05-01), Barbarin et al.
General Electric, "CF6-80 Engine Student Notebook," 1 Jun. 1983, pp.: cover, i, 236-270.
General Electric Company
Hess Andrew C.
Kim Ted
Scanlon Patrick R.
Thorpe Timothy
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