ORIGINAL: dick Hanson
a simple propeller on a common engine , turns one way , the engine tries to react the opposite direction.
Does the propellor produce a greater twisting force than a propulsive force?
Is there a fixed ratio?
which direction of force is the greatest?
Too easy?
Neither. The engine produces the twisting force, and the propeller produces the propulsive force. The twisting force will be the greater of the two, because the propeller is converting the twisting force the engine is producing and turning it into thrust and there will be mechanical losses in this conversion. Just a guess.