ORIGINAL: DarZeelon
Red B.,
Perhaps in the Mustang III (that would be the Piper Turbo Mustang), the tail is held high enough in the air for the rudder never to be in the lower section of the spiral prop-wash.
But having flown in a Piper PA-18 Super Cub (hardly a warbird), there is initial yaw in the opposite direction, before the tail rises during the take-off run. And then the yaw becomes 'normal'...
FYI, the Mustang III was the British designation for the Merlin powered North American P-51B and P-51C.