SilsoeSid - The Rotodyne was a tip jet aircraft, and thus did not need any anti-torque device to stop the airframe spinning.
I am curious as to it's ability to do spot turns? Does anyone know if it could, or did it just lift vertically before transitioning to forward flight, where fixed wing type control was available?
(I saw one of the tip jets at the Weston-Super-Mare museum, they were huge)