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| Boeing B-29 | |
|---|---|
| Name | Boeing B-29 Superfortress |
| Caption | B-29 Superfortress on display |
| Type | Heavy bomber |
| Manufacturer | Boeing |
| First flight | 21 September 1942 |
| Introduced | 1944 |
| Primary user | United States Army Air Forces |
| Produced | 1943–1946 |
| Number built | 3,970 |
Boeing B-29 The Boeing B-29 Superfortress was a four-engined heavy aircraft introduced by United States Army Air Forces during World War II, notable for high-altitude performance, pressurized cabins, and remote-controlled defensive armament. It played a decisive role in the strategic bombing campaign against Japan and in the atomic bombings of Hiroshima and Nagasaki, and later served in early Cold War operations and the Korean War.
Development began in response to a 1940 United States Army Air Corps requirement, with proposals submitted by Boeing, Consolidated Aircraft, and Douglas Aircraft Company; Boeing's design incorporated innovations tested on the XB-15 and XB-17 programs. Program management involved coordination with the War Department and engineers from Wright Field, while production planning engaged contractors including Bell Aircraft Corporation, Martin Company, and Vultee Aircraft. Flight testing at Edwards Air Force Base and evaluation by the Air Transport Command led to progressive refinements influenced by lessons from Battle of Britain strategic bombing theory and technologies from NACA research.
The airframe featured a mid-wing cantilever layout, double-redundant flight controls, and a largely all-metal monocoque structure drawing on Boeing experience with the B-17 Flying Fortress and XB prototypes. Pressurization systems allowed crewed operations at altitudes pioneered by Boeing 307 Stratoliner innovations; the cockpit incorporated instrumentation developed with input from National Advisory Committee for Aeronautics. Defensive armament used remote-controlled turrets with analog fire-control systems inspired by work at General Electric and IBM on computing gunsights. Powerplants were Wright R-3350 radial engines produced by Wright Aeronautical with input from Pratt & Whitney and thermal management solutions informed by NACA testing. Bomb load, range, and avionics reflected strategic requirements shaped by planners at US Strategic Bombing Survey and commanders including Curtis LeMay.
B-29 units entered service with units of the Twentieth Air Force under direct operational control tied to President Franklin D. Roosevelt and subsequent Harry S. Truman administration directives. Initial deployments to the China-Burma-India theater involved logistics operations staged via Operation Matterhorn using bases at Chengdu and Kharagpur, while later operations from the Mariana Islands, including Tinian, Saipan, and Guam, supported sustained campaigns against Japanese industrial targets such as Tokyo. The type conducted incendiary raids planned by commanders including LeMay and delivered atomic weapons in missions involving crews and support from Manhattan Project personnel, notably flights assigned to the 509th Composite Group headquartered at Wendover Army Air Field. Postwar roles included reconnaissance flights adapted from the F-13 designation linked to Strategic Air Command missions, participation in Korean War sorties by Far East Air Forces, and testing in nuclear-deterrence planning with units that evolved into United States Air Force wings.
Numerous production and specialized variants addressed roles from photographic reconnaissance to aerial refueling; examples included early XB prototypes, combat B-29 models produced by Boeing, and licensed builds by Bell Aircraft, Martin Company, and Vultee Aircraft. Reconnaissance conversions bore designations influenced by Air Force nomenclature and supported programs connected to Operation Crossroads nuclear tests and Cold War surveillance. Postwar experimental conversions informed development of later strategic systems such as the B-36 Peacemaker and early jet-powered strategic bombers.
Primary operator was the United States Army Air Forces and successor United States Air Force with service by numbered air forces including 20th Air Force and FEAF (Far East Air Forces). Allied and foreign use included limited postwar operation by Royal Air Force evaluation teams and transfer to nations through surplus programs, with crews and maintenance personnel associated with units and bases such as Roswell Army Air Field, Andersen Air Force Base, and Hickam Field.
A small number of airframes survive in museums and on display including examples at institutions such as the National Museum of the United States Air Force, the Smithsonian National Air and Space Museum collection, the Steven F. Udvar-Hazy Center, and the Pacific Aviation Museum Pearl Harbor. Restoration efforts have involved collaboration among organizations including Commemorative Air Force, Experimental Aircraft Association, and international conservation teams, with airframes recovered from sites linked to wartime operations in the Marianas and crash sites investigated by historians from Air Force Historical Research Agency.
General characteristics included four Wright R-3350 radial engines, wingspan and range parameters derived from strategic requirements authored by planners at Wright Field; bomb load capacity matched objectives outlined in studies by the US Strategic Bombing Survey. Crew complement and avionics suite reflected integration of pressurization systems from Boeing 307 Stratoliner research and fire-control components produced by General Electric and computing devices influenced by IBM engineering.
Category:Boeing aircraft Category:World War II United States bombers