engine pressure ratio

Also found in: Acronyms, Wikipedia.

engine pressure ratio (EPR)

The ratio of the turbine discharge pressure to the compressor inlet pressure. This ratio indicates the amount of thrust produced by the turbine engine.
References in periodicals archive ?
Globespan Airways Ltd, trading as FlyGlobeSpan, allowed the aircraft to take off from Liverpool John Lennon Airport on June 28 last year for Knock, in Ireland, and then on to JFK Airport, in New York, with two engine pressure ratio indicators (EPRs) out of action, a court heard in London.
Engine event recording provides a wealth of diagnostic data, including Engine Pressure Ratio, Fan Speed, Turbine Speed, Exhaust Gas Temperature and Fuel Flow exceedance occurrences for timely and accurate analysis.
As the 757 jet was taking off from JFK airport, both its engine pressure ratio gauges failed.