Integrated Engine Pressure Ratio
Encyclopedia
The integrated engine pressure ratio (IEPR) is the ratio of the pressure at the core engine exhaust and fan discharge pressure compared to the intake pressure to the gas turbine engine. The IEPR is an engine indicator system unique to the Rolls-Royce RB211
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In most gas turbine engines the engine pressure ratio (EPR) is used instead, which is the core engine exhaust pressure compared to the intake pressure to the gas turbine engine.
Rolls-Royce RB211
The Rolls-Royce RB211 is a family of high-bypass turbofan engines made by Rolls-Royce plc and capable of generating 37,400 to 60,600 pounds-force thrust. Originally developed for the Lockheed L-1011 , it entered service in 1972 and was the only engine to power this aircraft type...
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In most gas turbine engines the engine pressure ratio (EPR) is used instead, which is the core engine exhaust pressure compared to the intake pressure to the gas turbine engine.