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.
An Illustrated Dictionary of Aviation Copyright © 2005 by The McGraw-Hill Companies, Inc. All rights reserved
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.
At a height of 720ft the right engine's thrust reduced to 1.03 engine pressure ratio; seven seconds later the left engine did the same.
The climb rate almost tripled and the engine pressure ratio declined slightly before the incident, however the measures were normal ranges for flight operations.