Originally Posted by
m3113n1a1
it's gotta be so they can use the absolute minimum takeoff power to save juuust a tiny bit more gas and wear on the engines.
This is what I don’t get. On the 717 we use the same derate now as we did before. Before we routinely had TW10. Now it’s almost always TW0. The only thing I can tell *might* have changed is lower V speeds. Same derate and maybe get off the ground sooner. I don’t know what that saves, but I DO know it introduces unnecessary complexity and potential risk.