Accession Number : AD0164638

Title :   Apparatus for Indicating the Impending Failure of a Jet Engine.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON D C

Personal Author(s) : Couch,Robert P. ; Rossbach,Dennis R. ; Vopalensky,Robert A.

Report Date : 27 NOV 1973

Pagination or Media Count : 5

Abstract : The patent relates to an apparatus, for indicating impending failure of jet engines. It provides an electrostatic probe in the exhaust of the jet engine with the probe signal being applied to a circuit for providing pulses, at the amplitude of a signal in a sample and hold circuit, for each positive going signal followed by a negative going signal. A pulse height discriminator provides uniform output pulses, for each pulse exceeding the integrated engine noise level, and applies its output to a smoothing circuit. When the signal level in the smoothing circuit exceeds a predetermined level, a trigger circuit is operated to energize a warning circuit.

Descriptors :   *Jet engines, *Warning systems, *Patents, *Electrostatic probes, Signal processing, Noise analyzers, Ionic current

Subject Categories : Aircraft
      Jet and Gas Turbine Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE