What is nominal n1 and fuel flow behavior during cruise climb?
For a commuter airliner (e.g. 737) performing a cruise climb (step climb) at a constant Mach, how should n1 and fuel flow behave?
I know that fuel flow should decrease with altitude (air fuel ratio). Should fuel flow also decrease with weight (fuel burn off)?
Is n1 kept constant? Does it decrease with weight? Is it unaffected by altitude?
If it depends, then what systems (fadec?) or settings (rated/non-rated mode?) are responsible for setting the behavior.