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AIRCRAFT APPROACH GUIDE

  • US 3,825,180 A
  • Filed: 06/21/1973
  • Issued: 07/23/1974
  • Est. Priority Date: 06/21/1973
  • Status: Expired due to Term
First Claim
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1. A combination aircraft landing approach computer and flight profile monitor apparatus comprising:

  • a substantially planar base member;

    a substantially planar circular disc member rotatably attached to said base member, said base member oriented in a substantially overlying relationship with said disc member;

    a plurality of margins on said disc member, said margins having data disposed thereon;

    display means for graphically representing a flight profile of a glide path of an aircraft, said display means comprising graph means having a distance-to-threshold abscissa and an altitude ordinate and further having a plurality of glide slopes preplotted thereon;

    first window means in said base member operable to expose a portion of a first margin of said disc member to provide an indication of a rate of descent functionally related to the ground speed of the aircraft;

    glide slope scale means adjacent said first window means for providing a glide slope value corresponding to the rate of descent of the aircraft;

    second window means in said base member operable to expose a portion of a second margin of said disc member to provide an indication of a distance to a preselected landing threshold;

    time scale means adjacent said second window means for providing a range of time values corresponding to various distances to the landing threshold;

    third window means in said base member operable to expose a portion of a third margin of said disc member to provide a display of a preselected ground speed value;

    means for rotating said disc member to display the ground speed of the aircraft in said third window means and to simultaneously display a descent rate in said first window means and a distance to threshold in said second window means; and

    said disc member and said base member being cooperable to functionally relate a preselected ground speed to descent rate, glide slope, time to threshold, distance to threshold, and altitude, and to provide a graphical display of a projected flight profile of an aircraft on a glide path observing said functional relationship for monitoring the descent of an aircraft on the glide path.

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