Angle of attack sensor using inverted ratio of pressure differentials.

摘要: An angle of attack sensor (10) is provided with ports (20, 21, 22, 23) for sensing flow angles in desired planes based upon differential pressure at the 21 or when a reference axis changes relative to stream. Impact (qcm) also measured, and calculated by subtracting pressures sensitive 23), dividing measured impact (qcm). At higher attack, denominator qcm approaches passes through zero. It has been discovered that if ratio inverted some point zero, useable range indication can be greatly extended.