AIRCRAFT AUTOPILOT MECHANISM

The space inside housing 1 of the gyroscope unit, mounted on the airplane, is evacuated, the vacuum being produced by vacuum pump 2. The stream of air admitted through port a drives the rotor of gyroscope 3, which has a vertical axis. Rigidly attached to the gyroscope is a shutter (not shown) approaching either of two nozzles 4 to which air is delivered that is drawn in through capillary inlets d …