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Variable vane scheduling based on flight conditions for inclement weather

  • US 8,452,516 B1
  • Filed: 04/13/2012
  • Issued: 05/28/2013
  • Est. Priority Date: 01/31/2012
  • Status: Active Grant
First Claim
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1. A method of protecting a gas turbine engine, the method comprising the steps of:

  • determining a flight condition of an aircraft;

    comparing the flight condition to a programmed condition; and

    moving a plurality of compressor vanes of a compressor between a first position and a second position for deflecting foreign objects if the step of comparing the flight condition to the programmed flight condition determines the programmed flight condition is met, wherein the compressor includes a plurality of rotors, and an outer flowpath is defined between an outer diameter of the plurality of rotors and an outer casing of a gas turbine engine, and the plurality of compressor vanes direct the foreign objects into the outer flowpath for extraction through a duct with a downstream bleed.

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