A device for pivoting the flaps of a two thrust reversal device for aircraft engines having schalenfoermige flaps

摘要

1288834 Aircraft thrust reversers ROLLSROYCE Ltd 19 April 1971 [14 March 1970] 12354/70 Heading B7G Mechanism for moving an aircraft thrust reverser bucket 11 between inoperative (Fig. 2) and operative (Fig. 4) positions comprises a pair of arms 19, 20 pivoted at 22, arm 19 being pivotably anchored at 23 to aircraft structure and at 21 to the bucket, and arm 20 being connected at one end to the bucket at 25 by a pivotable link 24 and at the other end to a link 26 anchored to aircraft structure at 27. Axial rearward movement of a screwjack 28 rotates link 26 downwardly and rearwardly, so that arms 19, 20 rotate clockwise and anti-clockwise about pivots 23, 22 and link 24 swings upwardly and rearwardly. Bucket 11 is thus lifted upwardly and rearwardly, and reaches its operative position (after further movement of jack 28) when links 24, 26 and arm 20 extend in a straight line between pivots 25, 27, thus ensuring that bending moments are not set up in the linkage. The arrangement can be incorporated in a gas turbine jet engine upstream of the propulsion nozzle.