Accession Number : AD0163730

Title :   Subsonic Fluidic Angle-of-Attack Sensor.

Descriptive Note : Patent,

Corporate Author : OFFICE OF THE SECRETARY OF THE ARMY WASHINGTON D C

Personal Author(s) : Warren,Raymond W. ; Swartz,Elmer L.

Report Date : 25 MAY 1971

Pagination or Media Count : 5

Abstract : The patent relates to a fluidic angle-of-attack indicator for subsonic aircraft. Two sensing tubes are located in that portion of the stagnation region of the wing of the aircraft where the flow separates and are used to control the output position of the power jet of a proportional fluid amplifier. As the angle of attack changes the rate of fluid entrainment from each of the sensing tubes changes and causes deflection of the power jet. The source of fluid for the power jet is derived from a ram tube located on the wing surface, with an air filter being positioned between the power jet and the open end of the ram tube. The readout consists of a piston-type float which is responsive to a fluid pressure differential on its opposing sides.

Descriptors :   (*DETECTORS, PATENTS), (*FLIGHT INSTRUMENTS, *FLUIDICS), ANGLE OF ATTACK, ATTITUDE INDICATORS, FLUID AMPLIFIERS

Subject Categories : Flight Control and Instrumentation
      Fluidics and Fluerics

Distribution Statement : APPROVED FOR PUBLIC RELEASE