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Under the Whyte notation for the classification of steam locomotives, represents the wheel arrangement with no leading wheels, four powered and coupled driving wheels on two axles, and two trailing wheels on one axle. The configuration was often used for tank engines, which is noted by adding letters to the configuration, such as for a conventional side-tank locomotive, for a saddle-tank locomotive, for a well-tank locomotive, and for a rack-equipped tank locomotive. In the 1880s and 1890s the type was also used for some famous tender locomotives. Other equivalent classifications are: * UIC classification: B1 (also known as German and Italian classifications) * French classification: 021 * Turkish classification: 23 * Swiss classification: 2/3 ==Overview== The earliest recorded 0-4-2 locomotives were three goods engines built by Robert Stephenson and Company for the Stanhope and Tyne Railway in 1834.〔Science Museum, The British Railway Locomotive 1803-1853, H.M.S.O., 1958. p.13.〕 The first locomotive built in Germany in 1838, the ''Saxonia'', was also an 0-4-2. In the same year Todd, Kitson & Laird built two examples for the Liverpool and Manchester Railway, one of which, LMR 57 Lion, has been preserved. The Lion had a top speed of 45mph and could pull up to 200 tons (203 tones). Over the next quarter of a century the type was adopted by many early British railways for freight haulage since it afforded greater adhesion than the contemporary 2-2-2 passenger configuration, although in time they were also used for mixed traffic duties. 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「0-4-2」の詳細全文を読む スポンサード リンク
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