The P-51 Mustang fighter plane, entered WW2 in North Africa as the P-51A variant, a tank buster powered by the Allison engine. The P-51B was powered by perhaps the finest internal combustion engine ever made, the Merlin by Rolls-Royce. This is the plane flown by the Tuskegee Airmen, who escorted B-17s into Germany, protecting them against enemy fighters, without a single bomber lost. In the Korean War a twin-fuselaged variant, originally designed to escort B-29s to Japan, scored the first U.N. aerial victory.