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Adjustable two-stage aircraft landing gear system

  • US 4,869,444 A
  • Filed: 06/17/1988
  • Issued: 09/26/1989
  • Est. Priority Date: 09/30/1986
  • Status: Expired due to Fees
First Claim
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1. An adjustable landing gear for use with an aircraft, comprising, in combination:

  • means for measuring a vertical descent velocity of said aircraft and producing a velocity signal in response thereto;

    a first strut having first and second ends defining a first axis, said first and second ends being separated by a variable first distance, said first strut including means for receiving said velocity signal and controlling the rate at which said first distance varies as a first function of a first compressive force applied to said first strut along said first axis, said first strut being attachable to said aircraft at said first end;

    a trailing arm having an upper first end pivotally secured to said second end of said first strut;

    a wheel attached to a lower end of said trailing arm, said wheel being rotatable about a horizontal axis; and

    a second strut pivotally connected to said trailing arm and being pivotally supported through said second end of said first strut, said second end of said first strut and said connection of said second strut to said trailing arm defining a second axis and being separated by a variable second distance, said second strut being subjected to a second compressive force along said second axis, said second strut including means for receiving said velocity signal and controlling the rate at which said second distance varies as a second function of said second compressive force.

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