Supermarine Spitfire Mk.XII. The first version of the Spitfire to have the Rolls-Royce Griffon engine as a powerplant, these aircraft were generally Mk.V and Mk.IX airframes retrofitted with the new engine. A four bladed propellor was used, which meant that the Griffon still had plenty of power left to unleash, making the Mk.XII difficult to take off (this was rectified from the Mk.XIV onward by using a five-bladed prop). Only 100 were built, and they were used as either fighter bombers or to counter Fw-190 “Tip-and-Run” raids on southern England during 1943-44.