Apparatus for projecting artificial horizon viewable by...

Details Apparatus for projecting artificial horizon viewable by... Apparatus for projecting artificial horizon viewable by...

G - Physics

01

C

G01C 21/00 (2006.01) G01C 15/14 (2006.01) G01C 23/00 (2006.01)

Patent

CA 2073427

Apparatus for projecting an elongated light bar (95) representing an artificial horizon on an interior surface of an aircraft cockpit (94) in front of a pilot of the aircraft with respect to a reference datum line (H) on the interior surface of the cockpit. A vertical reference means, located in the cockpit or remotely therefrom maintains a vertical reference axis for all attitudes of the aircraft. A light beam source (12), which may be a laser beam, is aligned with a moveable optical system having mirrors (26, 40) or lenses to convert the light beam to a plane of light. A mechanical linkage (75) or a servomotor (132, 136) coupled between the ver- tical reference means and the optical system controls the optical system, so that the datum line (H) appears stationary and the light bar (95) seems to turn angularly and move vertically when the aircraft rolls and pitches.

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