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13th Jan 2001, 19:54

#6 (permalink)

Cough

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737-200

T/O Epr - Typical 2.10
G/A EPR - Typical 2.08

EPR = Pressure at back / Pressure at Front

On T/O - Pressure at back is constant (give or take), pressure at front increases (ram effect) hence EPR decreases.