Boeing B-29 Superfortress "Enola Gay" (signed)Boeing B 29 signed by Tibbets. Boeing's B 29 Superfortress was the most sophisticated, propeller driven, bomber to fly during World War II, and the first bomber to house its crew in pressurized compartments. Boeing installed very advanced armament, propulsion, and avionics systems into the Superfortress. During the war in the Pacific Theater, the B 29 delivered the first nuclear weapon used in combat. On August 6, 1945, Colonel Paul W. Tibbets, Jr.,