Re the UA811 accident, if you intend to have a hole in the side of the aircraft and both engines on that side out and want to impress professional jet transport pilots remember the following:
1. In level flight the aircraft will require almost full rudder and aileron to maintain direction. This is because, in addition to having the engines out, there is additional drag from damage on that side.
2. As speed is reduced and flap is extended for landing, drag will increase and more power will be required. More power equals more control input. No more control is available so aircraft will roll toward dead engines - bye, bye.
3. Solution: Commence descent and flap extension from 30 miles and 10,000ft so that live engines remain well below full power. You cannot fly level and are committed to land with no possibility of a go-around.