Quote:
Originally Posted by trebuchet03
Doh! That should have been 140MW - which is
Oh, don't forget the 1450hp APU (you do want a pressurized cabin and hydraulic controls, right?) - which is roughly 1MW...
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Good stuff in the rest of the post, The APU is mostly on on the ground, to provide air to start the engines, during takeoff, and approach. In cruse it is off (at least on a 727 and 737, a 747 I don't imagine it would be much different). The cabin pressure comes from bleed air from (I think) one or both of the two inboard engines.