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__NOTOC__ The Tupolev ANT-37 (or DB-2) was a Soviet twin-engined long-range bomber designed and built by the Tupolev design bureau,〔 the design team operating under the guidance of Pavel Sukhoi.〔 The aircraft did not enter production, but three examples of the type were used for research and record breaking flights.〔 ==Design and development== Based on the unbuilt Tupolev ANT-36 (DB-1) single-engined bomber, the ANT-37 was a twin-engined monoplane〔 of stressed skin, dural construction,〔 fitted with a high-aspect-ratio wing〔 and tailwheel landing gear, the main units retracting into the engine nacelles.〔 Powered by Gnome-Rhône 14K radial engines, the prototype first flew on 16 June 1935.〔 The program suffered a setback when the prototype crashed the following month, after the tail splintered into pieces during flight.〔 A re-designed second prototype was built, designated as the DB-2D, in an attempt to overcome the design problems encountered during flight testing, particularly with the tail unit.〔 It was decided not to order the type into production, the Ilyushin DB-3 being selected for Soviet Air Force service instead.〔 Despite this, three aircraft were built, designated ANT-37bis (or DB-2B), for research and record breaking purposes. These three aircraft would survive into the 1940s.〔 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Tupolev ANT-37」の詳細全文を読む スポンサード リンク
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