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SOUND-SUPPRESSING AND THRUST-REVERSING APPARATUS

  • US 3,568,792 A
  • Filed: 06/18/1969
  • Issued: 03/09/1971
  • Est. Priority Date: 06/18/1969
  • Status: Expired due to Term
First Claim
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1. Sound-suppressing and thrust-reversing apparatus for use with a jet engine mounted in a nacelle, comprising:

  • an exhaust nozzle located at the aft end of the nacelle and adapted to receive a high-velocity exhaust gas stream from the engine and discharge it rearwardly;

    at least two oppositely disposed deflectors movably mounted on the nacelle;

    said deflectors having leading and trailing edges and being generally arcuate in cross section transversely of the axis of the nozzle and adapted in a first, retracted position to surround a major portion of the nozzle;

    the trailing edge of each deflector being serrated to form a plurality of rearwardly directed spikes; and

    actuator means adapted to move said deflectors to a second, extended position in which their leading edges extend into the slipstream to serve as scoops and direct ambient air inwardly over the exterior of the nozzle, and at least some of the spikes extend into the exhaust gas stream to cause turbulence in the flow and at least partially suppress the exhaust noise.

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