Boeing B-29 Superfortress
The Boeing B-29 Superfortress was a four-engined, long-range bomber of the United States Air Force. The largest of all Second World War (1939-45) bombers, B-29s were used to strike Japanese targets from the summer of 1944. In August 1945, the B-29s 'Enola Gay' and 'Bockscar' each dropped an atomic bomb on Hiroshima and Nagasaki, respectively, thereby ending the war.
Development
In the 1930s, the United States Army Air Corps (USAAC) required a long-range strategic bomber that could attack enemy targets thousands of miles from the aircraft's home base. One of the problems to make such an aircraft a reality was to find engines which were powerful enough for the task. The project to design and build a long-range, high-altitude precision bomber, or VLR (Very Long Range) as such aircraft became known, was greatly accelerated following the invasion of Poland in 1939 by Nazi Germany and the outbreak of WWII. In January 1940, five aircraft companies were tasked with designing a VLR bomber. Four companies came back with a design proposal: Consolidated, Douglas, Lockhead, and Boeing. After two of the companies later withdrew, only Consolidated and Boeing won construction contracts in September 1940. Ultimately, each company built three prototypes. Boeing's construction plans were more advanced since it had already been working on modifications of its existing Boeing B-17 Flying Fortress design. Boeing received an order of 1,500 VLRs and promised these aircraft would be ready within three years.
Following the Japanese attack on Pearl Harbour in Hawaii, home of the US Pacific naval fleet, on 7 December 1941, the need for VLRs in the vast theatre of the Pacific Ocean suddenly became a necessity. The first Boing VLR prototype, called XB-29, flew on 21 September 1942. The very large wings of the craft were designed to help it land at lower speeds, and tricycle landing gears helped bear the tremendous weight. 14 test aircraft began to fly from June 1943. The planes were built at four principal plants: Renton, Wichita, Marietta, and Omaha. Boeing, Bell, and Martin were just three of the main companies involved, but there were thousands of others providing components and partial assembly. The B-29 project "was the largest aircraft manufacturing project undertaken in the USA during World War II" (Mondey, 29). It was also the most expensive. From the autumn of 1943, the first B-29 bombers were delivered to US air bases.
B-29 Superfortress in Flight
US Air Force (Public Domain)
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