engine pressure ratio

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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 ?
The engine pressure ratio gauges are on a mandatory list which has to be operational if the 757 is to be certified as airworthy by the CAA.
The climb rate almost tripled and the engine pressure ratio declined slightly before the incident, however the measures were normal ranges for flight operations.
The Instructor Pilot (IP) quickly scanned the engine instruments, specifically checking the engine pressure ratio and engine fan speed in rpm of the number one and two engines, but saw no indication of engine failure.