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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 FS Class 746 ： ウィキペディア英語版 FS Class 746 The Ferrovie dello Stato Italiane (FS; Italian State Railways) Class 746 (Italian: ''Gruppo 746'') is a class of 2-8-2 'Mikado' steam locomotive. ==Design and construction== The Class 746 originated from the need of a fast locomotive that, while having similar performance to the 'Pacific' Class 690, could have a lower axle load and therefore wider route availability; this could be achieved by adding another driving axle, and accepting a lower top speed (reverting to a leading Italian bogie). To achieve high performance, it was decided to adopt a symmetric compound engine, with the two inside HP cylinders having the motion for their valves derived from the outside Walschaerts valve gear; this was unusual for Italian locomotive practice, where the compound engine had been shelved once the superheating technology had become available in the 1910s.〔Cornolò, p. 408-11〕〔Kalla-Bishop, p. 75〕 Forty locomotives were ordered to the Ernesto Breda, which produced them in 1922, and then ten more in 1926; Gio. Ansaldo & C. built ten more, fitted with Caprotti valve gear, in the same years. The latter were initially classified as Class 747, but in 1930 they were reclassified as the 746.100-110 subclass.〔Kalla-Bishop, ibidem〕 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「FS Class 746」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.