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Boeing F2B
The Boeing F2B was an biplane fighter aircraft of the United States Navy in the 1920s, familiar to aviation enthusiasts of the era as the craft of the Three Sea Hawks aerobatic flying team, famous for its tied-together formation flying.〔Swanborough, and Bowers 1976〕 ==Design and development== Initially the Boeing Model 69, it was inspired by the results of tests on the FB-6, which was powered by a Pratt & Whitney R-1340B Wasp radial engine. Boeing set out to use this engine in a fighter designed specifically for carrier operations, using the same welded-tubing fuselage and wooden-frame wings as for the Model 15, and adding a large spinner to reduce air drag around the engine (this was dropped in production). Armament was either two machine guns, or one .30 in and one ; the lower wing had attachments for up to four bombs, plus a fifth could be hung from the fuselage.〔Jones 1977, pp. 47–49.〕
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