A-3 SkywarriorDouglas A 3 Skywarrior airplane model. The Douglas A 3 Skywarrior was the Navy's first twinjet nuclear bomber. Douglas started designing the airplane in 1947, after the U. S. Navy commissioned studies to determine whether it was possible to overcome weight problems and build a carrier based strategic bomber. The project was challenging because anything to do with nuclear armament was top secret, and designers had to guess the appearance and weight of