apu

Great - just what we need...an engine the produces more water ;) Mind you they probably won't be run at contrail altitudes, and the water might be kept on board as the a/c's water supply!! In addition to cutting emissions and noise on the ground, the use of fuel cells would also offer...

Look-up is suggesting the APU exhaust and other protrusions at the end of an MD-11 are suspicious. https://www.facebook.com/permalink.php?story_fbid=1517931061770964&id=1410029482561123 However this schematic from 1989 clearly identifies it as the APU exhaust. Nothing suspicious at all. The...