I think you guys are confused as to what my question was actually asking. I understand why there is a critical engine, that not every plane has a critical engine. The only question I had is ASSUMING that every propeller spun clockwise (and only clockwise) would every plane have a critical engine? If you read any multi engine hand book or even the King Multi engine ground school no where in there does it refer to heavy multi engine airplanes. I am merely trying to verify that if every propeller did in fact spin clockwise that every airplane would in fact have a critical engine.