Originally Posted by
Riverside
We have to do the SIM cause they want us to use flaps 18 more. This way it will save fuel......And saving fuel equals......more money saved.
I am sorry but WHAT?
Flap extension beyond F9 reduces ground roll required during a takeoff. This is vital in hot and high operations when you are runway distance limited. The engines still burn whatever they would normally burn at ALT TO1 or TO1.