> With a propeller there would be a bending component (propeller acting a gyroscope) besides the twisting component, especially when say doing aerobatics, while

> With a propeller there would be a bending component (propeller acting a gyroscope) besides the twisting component, especially when say doing aerobatics, while in a car the it will be mostly a twisting component. Is this a significant component? From what I've heard, a big thing with using automotive engines in aircraft is that aircraft engines spend most of their time at close to full throttle. In a car, however, average power output is probably 20% or even less of full power.