Hi Sloflight - Interesting stuff - I have just one question about this statement -

"If you were to (hypothetically) hover an aircraft in a vaccume (yes, I know its not possible, but stick with me), after some period of time, the airframe would be spinning as fast as the prop, and therefore, the prop wouldn't be spinning at all in relation to the aircraft. "


The thing i'm wondering about is in relation to the pilot in the airplane the propeller rotates clockwise - a torque roll rotates the plane counterclockwise. - Would that mean the the plane will rotate the same rpm but opposite the direction in a vacumm? Or am I missing something with the use of tools in space relation? This is all interesting stuff thanks