If you look at a net thrust chart, you will see the amount of thrust that the engine is capable of producing versus the temperature, in most cases that i have seen, jet engines are capable of producing their RATED thrust up to ISA+15 or 30C, after that the amount of thrust decreases. The term used is that these engines are FLAT RATED to ISA+15 (Or whatever the temp is).
As a crewmember you have NO control over the flat rated temperature, it is a certified level dictated my the manufacturer.
Totally different to DERATED.
Mutt
Last edited by mutt; 11th September 2002 at 05:35.