If EPR 1 equals zero thrust (which is not idle for a jet) how come have I seen EPR of 0.9-1.0 in the cruise? RR Trent 772 I think.
I am by no means an expert on EPR. Have only flown an EPR equipped Jet for 600 hours or so before moving on to N1.
Normally EPR 1.00 is what you would have at idle on the ground. I always understood that EPR below 1.00 in flight is at idle with the pressure rise caused by the Ram Air effect. Correct me if I´m wrong please....