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Predictive windshear warning instrument

  • US 5,059,964 A
  • Filed: 12/01/1989
  • Issued: 10/22/1991
  • Est. Priority Date: 04/03/1987
  • Status: Expired due to Term
First Claim
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1. In an aircraft having means for providing a signal representative of a windshear condition, means for providing a signal representative of the altitude of the aircraft, means for providing a static air temperature signal representative of the temperature of the air through which the aircraft is flying and means for providing a warning in the event that the signal representative of a windshear condition exceeds a threshold signal, the improvement comprising:

  • means responsive to the altitude representative signal for providing a standard temperature representative signal that is determined by the altitude of the aircraft;

    threshold setting means for comparing the temperature signal and the standard temperature representative signal and decreasing the value of the threshold signal when the static air temperature representative signal decreases at a greater rate than the standard temperature representative signal, wherein said threshold setting means includes means for lowering the value of the threshold signal for a predetermined geographic position of the aircraft which indicates a windshear condition is probable.

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