초록 ▼

A thrust reverser including a bypass duct and a plurality of light weight, circumferentially displaced blocker doors each movable between a normal position and a thrust reversal portion. The blocker doors include pits on the inner portion which faces the bypass duct during normal operation of the en

A thrust reverser including a bypass duct and a plurality of light weight, circumferentially displaced blocker doors each movable between a normal position and a thrust reversal portion. The blocker doors include pits on the inner portion which faces the bypass duct during normal operation of the engine. Provision is made for automatically covering the pits during normal operation to provide smooth, non-turbulent flow of air through the bypass duct. In one embodiment of this invention a pit cover is pivotally mounted on the blocker door and is biased to engage the edge of a ramp fairing when the blocker door is in the position it occupies during normal operation of the engine. During thrust reversal, the pit cover moves outwardly along with the blocker door and away from the ramp fairing so as not to impede in any way flow of thrust reversal air through an opening in the outer wall. In a modified form of the invention, the ramp fairing is constructed so as to be movable between an extended position wherein it covers the pit curing normal operation of the engine and a retracted position wherein it does not impede the flow of air through the opening in the outer wall during thrust reversal operation.

대표청구항 ▼

A thrust reverser for a gas turbine engine of the type which includes an outer wall spaced from the center body of a core engine to define a bypass duct therebetween, said thrust reverser comprising: (a) a plurality of circumferentially displaced blocker doors, each of said doors being movable betwe

A thrust reverser for a gas turbine engine of the type which includes an outer wall spaced from the center body of a core engine to define a bypass duct therebetween, said thrust reverser comprising: (a) a plurality of circumferentially displaced blocker doors, each of said doors being movable between a normal position generally aligned with said outer wall and a thrust reversing position extending transversely of said bypass duct for blocking the exhaust of air through said bypass duct and directing the air through an opening in said outer wall for thrust reversal; (b) each of said blocker doors being of lightweight construction and including a pit in the inner surface thereof in said normal position; (c) means for covering said pit during normal flow of air through said bypass duct to reduce the pressure drop in said bypass duct and to reduce noise; (d) said covering means including a pit cover hingedly mounted at one end thereof on said blocker door; and (e) means for biasing said pit cover away from said blocker door to a position providing smooth flow of air through said bypass duct during normal operation.