The well known Derate/Assumed issue

[FlightDetent]

tdracer

Understandable.

I assume the U curve of a particular engine curve has different shapes for different air densities and (different EGT values). Also, that you cannot go too far up the side since you'd hit engine rating cutoff. And that engine rating cut-off may be well close to U's bottom, or even before it?. I am thinking CFM 56 wide max. thrust options 33 - 23,37 k.

The reason I poke you so much is the CFM material nick14 mentions. It specifically goes on to say (my recollection) "we need to admit that FULL THRUST tkof will use less fuel per event, yet the associated performance degradation will increase overall consumption. The accumulated effect is more fuel used even before the next shop visit, it makes no sense cash-flow wise to do it"..

Thanks, enjoy your holiday well!