| 摘要 |
In the past there has not been a simple, accurate device for indicating the angle of attack and direction of night of an airplane. The airplane angle of attack and direction of night indicator of this invention includes a vane (46) on the outside of the fuselage which is pivotally movable in response to changes in the airplane's angle of attack. A group of optical fibers (68) are supported within the airplane with one end positioned for exposure to a light source (64). A light shield (48) is movable into and out of blocking relation between the light source (64) and optical fibers (68) in response to pivotal movement of the vane (46) arranged in an indicator (80) in the airplane cockpit, the illumination of fibers at the indicator (80) affords a ready indication of the airplane's angle of attack. With the opposite ends of the fiber arranged in vertically spaced relation, a sighting device (84) may be interposed between the pilot and indicator (80) for establishing a line of sight along the actual direction of flight. Such a device will provide all aircraft even the small private plane with a simple, economical and accurate device for indicating to the pilot at a glance the angle of attack and direction of flight of the plane. |
