Low Observable:
Can someone explain why you'd need to autorotate in a twin-engine aircraft? After all, the 757 that I took from LGW to EWR the other day doesn't have an official two-engine-out mode.
Well I gave a recent example of an autorotation and engine off landing in a twin engine rotary. Your 757 does have a 2 engine out mode - it's called gliding - and it has been useed in anger on large commercial twin jets in recent times. Two examples off the top of my head would be the Airbus the glided about 200 miles into the Azores and the hijacked Ethiopian 767 that ditched off the Comores after running out of fuel.
The point is that double engine failures do occur, often for unpredictable reasons. To design an aircraft that, to use a media term, falls out of the sky following a double engine failure seems unwise to me. Many people owe their lives to the fact that most fixed wing and rotary aircraft can be placed on the ground with a good chance of success following the failure of all engines.