Robin Langtry

Seattle, Washington, United States Contact Info
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  • Avalanche Energy

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Patents

  • Quiet Landing Gear Door

    Issued US US8944364 B2

    A quiet landing gear door and methods are presented. A landing gear door comprises a trailing edge and a leading edge and is operable to deploy to a landing gear door deployed position. A door flap comprises the trailing edge and is hinged to the landing gear door. The door flap deflects toward a landing gear strut to a door flap deployed position in response to deployment of the landing gear door. A leading edge section comprises the leading edge and is coupled to the door flap. The leading…

    A quiet landing gear door and methods are presented. A landing gear door comprises a trailing edge and a leading edge and is operable to deploy to a landing gear door deployed position. A door flap comprises the trailing edge and is hinged to the landing gear door. The door flap deflects toward a landing gear strut to a door flap deployed position in response to deployment of the landing gear door. A leading edge section comprises the leading edge and is coupled to the door flap. The leading edge section deflects toward the landing gear strut to a leading edge deployed position in response to deployment of the landing gear door. In this manner, embodiments of the disclosure provide a quiet landing gear door that reduces noise generated by interaction of a landing gear wake with an aerodynamic surface.

    Other inventors
    • Drew Wetzel
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  • Variable Diameter Open Fan

    Issued US 8,821,118

    Stream tube contraction in Contra Rotation Open Fan engines (CROF) creates interaction unacceptable noise that could historically only be mitigated by 'cropping' or permenantly reducing the downstream propeller disc diameter; which degrades engine performance. This invention presents a variable diameter propeller disc which prevents interaction noise during the brief period of takeoff by contracting the diameter and then increasing it as the stream tube expands with increasing airplane speed to…

    Stream tube contraction in Contra Rotation Open Fan engines (CROF) creates interaction unacceptable noise that could historically only be mitigated by 'cropping' or permenantly reducing the downstream propeller disc diameter; which degrades engine performance. This invention presents a variable diameter propeller disc which prevents interaction noise during the brief period of takeoff by contracting the diameter and then increasing it as the stream tube expands with increasing airplane speed to improve engine performance

    Other inventors
    See patent
  • Reducing Counter Rotating Open Fan Noise by Varying Disc Spacing

    Issued US 8,661,781

    While potentially enabling breakthroughs in reduced fuel consumption; counter rotation propfans, or "Open Fans" can have noise issues associated with blade interaction. This invention enables the spacing between blades to be varied during takeoff to reduce noise

    Other inventors
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  • Air Vehicle Propulsion System with Counter Rotating Fan Design and Method for Noise Reduction

    Filed EU 10703157.7-2321

    This is the European patent application for US Patent 8,661,781

    Other inventors
    See patent

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