Charles W Gibbs

US Patent:

52148556, Jun 1, 1993

Filed:

Dec 10, 1991

Appl. No.:

7/805573

Inventors:

Charles W. Gibbs - Buena Vista CO

International Classification:

G01C 2120

US Classification:

33 1SD

Abstract:

An instrument flight navigational apparatus includes a flat board having a center hole and indicia displayed on a front face relative to the center hole, a circular holding pattern template of transparent material and having a center hole and indicia displayed on a front face relative to the center hole, a compass protractor of transparent material having a center hole and indicia displayed on a front face relative to the center hole, and a flat elongated needle of transparent material having a center hole and a pointer displayed on a front face relative to the center hole. The apparatus also includes a plurality of annular spacers disposed between the board, template, protractor and needle for spacing the template from the board, the protractor from the template and the needle from the protractor so as to allow rotation of the template, protractor and needle independent of one another and relative to one another and to the board. The apparatus further includes a releasable fastener for extending through the center holes of the board, template, protractor and needle for aligning and overlaying the board, template, protractor and needle and releasably clamping them at any desired rotational angular position relative to one another. The first, second and third indicia and the pointer displayed on the respective board, template, protractor and needle are data and symbols adapted for use in solving navigational problems encountered in an instrument flight environment.