North american o 47 observation aircraft north american p 51 mustang fighter north american p 64 fighter advanced trainer north american p 82 twin mustang northrop a 13 a 16 a 17 a 33 attack aircraft northrop xp 56 black bullet prototype fighter northrop p 61 black widow night fighter northrop xp 79 prototype interceptor. No 2 north american p 51 mustang the north american p 51 mustang takes the second spot because it was the best all round fighter aircraft of the war. List of aircraft of world war ii operational aircraft bleriot spad s510 heinkel he 51 kawasaki ki 10 kochyerigin di 6 koolhoven fk52 ansaldo a120 prototypes prototypes were aircraft that were intended to enter service but did not either due to changing experimental aircraft aircraft . American aircraft of world war ii this book provides a useful guide to some 120 aircraft that served with the us air force from 1939 1945 both combat and non combat aircraft are covered by text detailing each types origin history and variants followed by a full technical specification