The Convair B-36 Peacemaker was an American military intercontinental bomber developed during the Second World War and operated during the early Cold War. Its enormous airframe and mixed piston-and-jet propulsion in later versions reflected the challenge of carrying heavy weapons over very long distances.[1]Convair B-36J PeacemakerNational Museum of the United States Air Force · nationalmuseum.af.mil · Accessed 2026-09-13Open source details
Origins and propulsion
The B-36 first flew in August 1946, and Strategic Air Command received its first operational aircraft in June 1948. The design answered a wartime requirement for intercontinental reach but arrived too late for the conflict that had prompted it.[1]Convair B-36J PeacemakerNational Museum of the United States Air Force · nationalmuseum.af.mil · Accessed 2026-09-13Open source details
The B-36J used six Pratt & Whitney R-4360 piston engines supplemented by four General Electric J47 turbojets. The jets provided extra power when greater speed was required. With a wingspan of 230 feet, the Peacemaker occupied a scale very different from the medium bombers that also entered the post-war force.[1]Convair B-36J PeacemakerNational Museum of the United States Air Force · nationalmuseum.af.mil · Accessed 2026-09-13Open source details
Defensive armament
Early B-36s carried several remotely controlled cannon turrets. Six retractable installations each mounted two 20-mm cannon, while additional non-retractable turrets protected the nose and tail. Retracting the fuselage turrets reduced drag during the long cruise portions of a mission.[2]B-36 Remote Gun TurretNational Museum of the United States Air Force · nationalmuseum.af.mil · Accessed 2026-09-13Open source details
The complicated system suffered reliability and aiming problems. The Featherweight programme removed most defensive guns, retaining the tail installation, and reduced weight to improve speed, altitude and manoeuvrability. This change marked a move away from the wartime assumption that a bomber's survival depended on concentrated fire from many gun positions.[2]B-36 Remote Gun TurretNational Museum of the United States Air Force · nationalmuseum.af.mil · Accessed 2026-09-13Open source details
Operational career
B-36s served as nuclear deterrent aircraft without flying combat bombing missions. Other examples carried photographic equipment or participated in experiments launching and recovering modified reconnaissance aircraft. Production ended in 1954, and all-jet B-52s replaced the type during 1958–1959. The surviving B-36J at the National Museum of the United States Air Force made the family's last flight in April 1959.[1]Convair B-36J PeacemakerNational Museum of the United States Air Force · nationalmuseum.af.mil · Accessed 2026-09-13Open source details