Accession Number : ADD005269

Title :   Augmentor Outer Segment Lockout and Fan Upmatch.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON D C

Personal Author(s) : Abernethy,Robert B ; Preti,Edmond ; Rembold,John P

Report Date : 20 Jun 1978

Pagination or Media Count : 6

Abstract : A thrust augmented twin spool turbofan engine system to control instability at high altitude, low Mach number conditions wherein an engine electronic control monitors engine inlet temperature, engine burner pressure and Mach number, AND INHIBITS FUEL FLOW TO THE OUTERMOST AUGMENTOR SEGMENT WHEN THE ENGINE INLET TEMP DROPS BELOW 25 F, when engine burner pressure drops below 120 psia or when the Mach number drops below 0.4. When fuel flow to the outermost augmentor is inhibited, upmatch logic modifies the variable nozzle AJ trim signal closed 8% and the power level angle trim signal up 4 deg. (Author)

Descriptors :   *Patents, *Thrust augmentation, Turbofan engines, Stability, High altitude

Subject Categories : Jet and Gas Turbine Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE