Accession Number : ADD003102

Title :   Fluidic Angle-of-Attack Sensor.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Freeman,Perer A

Report Date : 07 Sep 1976

Pagination or Media Count : 5

Abstract : The patent relates to a fluidic angle-of-attack sensor for providing a differential output proportional to the angle-of-attack of flow impinging on the sensor. An excitation flow nozzle discharges into a coanda-effect cavity which opens into a centrally oriented impingement cavity so that excitation flow penetrates and impinges on the ambient flow field. A pair of output ports alternately intercept part of the excitation stream to provide a differential output pressure. When the sensor is pointed across the flow field, the flow field augments the coanda effect in bending the stream one way while opposing it in bending it the other way to provide a differential output pressure proportional to angle-of-attack.

Descriptors :   *Aircraft, *Angle of attack indicators, *Fluidic control, *Patents, Air flow, Detectors, Coanda effect, Flow fields

Subject Categories : Flight Control and Instrumentation

Distribution Statement : APPROVED FOR PUBLIC RELEASE