Douglas XB-19A 38-471 United States Army Air ForceThese are 1 72 scale decals for Douglas XB 19A 38 471 in United States Army Air Forces service, depicting the aircraft following its re engining conversion during World War II. By 1943, the original Wright R 3350 radial engines of the XB 19 were replaced with four Allison V 3420 liquid cooled engines the most powerful American piston engines of the era earning the aircraft its new XB 19A designation. The conversion gave the already enormous aircraft