Challenge:
Build a airplane that can fly if 1 engine is lost.
Of course, you can't build a engine-less or a 8 engine plane.
Maximum number of engines allowed: 4
If 3 engine, like the Mc Douglas DC 30, it need to fly if 2 engines are knocked out.
If 4 engine ... well this could be tricky.
Because, say, the Boeing 747. It is able to fly with 2 engines (hopefully failures are not on the same side). Mc Douglas DC 30 can safely fly with any two, and may suffer some issues (but can land good) with 1 engine.
4 engine airplanes are not supposed to handle 3 engine fails because the reduction in power is too much for maybe the aircraft to sustain flight. But allowing it 2 engines are very unfair to 2 engine aircrafts.
So ... we will say that 3 is the maximum engine allowed in this challenge.
Be creative! The engines don't have to be on different sides, and they don't have to be propeller, turboprop, turbojet or turbofans. Gyroscopes are NOT allowed (you can have them, but they must not change airplane flight characteristics or can be turned off.)

Engines will be cut fuel to by setting them to different activation groups.

It must be able to fly from Wright Airport Final Approach to the Wright Isles anorth Runway with 1 engine.
Bonus can be acquired if it can take off with only one engine (uh ... no pull-push configuration pls)