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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Bartel BM-5 ： ウィキペディア英語版 Bartel BM-5 The Bartel BM-5 was a Polish biplane advanced trainer used from 1930 to 1939 by the Polish Air Force, manufactured in the Samolot factory in Poznań. ==Design and development== The aircraft was designed by Ryszard Bartel in Samolot factory in Poznań, as an advanced trainer, transitory between primary trainers and bomber or reconnaissance aircraft. Bartel had worked since 1926 on his BM-3 advanced trainer design, the preliminary design for which won a military contest, but in the meantime he developed a quite successful primary trainer Bartel BM-4 and then decided to model the advanced trainer upon that plane, to obtain better durability. The result was the BM-5 design. The BM-5 prototype was built in 1928 and flown on 27 July that year in Poznań. It had good handling, high stability and spin resistance, which made it a suitable trainer for larger aircraft. A distinguishing feature of all Bartels was an upper wing of a shorter span, because lower and upper wing halves were interchangeable (i.e. the lower wingspan included the width of the fuselage). The first prototype was designated BM-5a and was fitted with a Austro-Daimler inline engine. The second prototype, flown on 15 April 1929, was designated BM-5b and was fitted with a SPA-6A inline engine, then was refitted in August with a Hispano-Suiza 8Fb V-engine and redesignated BM-5c (it was meant to utilize engine stores from the Bristol F.2 Fighter). Next 20 aircraft of each type were built: BM-5a, BM-5b and BM-5c. A disadvantage of most BM-5s were old and faulty engines. From all the variants the BM-5a variant was the heaviest and had the worst performance. For that reason in 1935 one BM-5 was fitted at the PZL works with a Wright Whirlwind J-5 radial engine, produced in Poland (in Polish Skoda Works, then Avia). This variant was designated the BM-5d and 20 of BM-5a and BM-5b were next converted to BM-5d. 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「Bartel BM-5」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.