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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 Steam spring ： ウィキペディア英語版 Steam spring Steam springs or steam suspension are a form of suspension used for some early steam locomotives designed and built by George Stephenson. They were only briefly used and may have been used for fewer than ten locomotives. == Requirements for suspension == Early railways used cast-iron fishbelly rails. These were brittle and prone to cracking under shock loads. The new steam locomotives of the 1820s were much heavier than the horse-drawn wagons of earlier plateways. Locomotives of this period also used vertical cylinders set within the boiler. The vertical forces of the moving pistons further gave rise to hammer blow, which increased the load on the rails. A further reason for suspension was to improve the frictional contact between the wheels and rail. This relied upon maintaining a good contact, thus requiring good suspension of the wheels over the uneven track. 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「Steam spring」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.