Accession Number : ADD004400

Title :   Duct Pressure Actuated Nozzle.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON D C

Personal Author(s) : Maurer,John H

Report Date : 20 Sep 1977

Pagination or Media Count : 4

Abstract : A variable area nozzle which utilizes high pressure duct nozzle air directly to actuate a variable area nozzle and thereby control the nozzle throat area is described. A servo controlled air valve directs the duct air pressure into a pressure cavity causing the nozzle to move toward the closed position while the nozzle entrance pressure acting on the converging flaps urges the nozzle to move toward the open position while the pressure cavity is exhausted to ambient through the air valve. Thus, the need for mechanical and/or hydraulic drives with the associated cooling requirements to produce variations of the nozzle configuration are effectively eliminated. (Author)

Descriptors :   *Patents, *Variable area nozzles, *Ducts, *Actuators, Convergent divergent nozzles, Pressure, Actuation, Servomechanisms, Jet engines

Subject Categories : Jet and Gas Turbine Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE