Tamiya 1/48 N.American P-51B Mustang 61042About the North American P 51B Mustang The Allison engine powered P 51A Apache, was derived from the original RAF Mustang 1 ground attack and photo reconnaissance aircraft. Long before anyone had even heard of a Mustang, the plan to put a Rolls Royce Merlin engine into the airframe had started. The Merlin was powering some of the best warplanes in England; the Hurricane, Spitfire and the Avro Lancaster bomber. To develop a new engine for the P 51