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Under the Whyte notation for the classification of steam locomotives, a 2-10-4 locomotive has two leading wheels, ten driving wheels (in other words, five driven axles), and four trailing wheels. These were referred to as the Texas type in most of the United States, the Colorado type on the Burlington Route and the Selkirk type in Canada. Other equivalent classifications are: * UIC classification: 1E2 (also known as German and Italian classifications) * French classification: 152 * Turkish classification: 58 * Swiss classification: 5/8 * Russian classification: 1-5-2 ==Overview== The 2-10-4 originated and was principally used in the United States. The evolution of this locomotive type began as a 2-10-2 "Santa Fe" type with a larger four wheeled trailing truck that would allow an enlarged firebox. A subsequent development was as an elongated 2-8-4 "Berkshire" type that required extra driving wheels to remain within axle load limits. Examples of both of these evolutionary progressions can be found.〔Barris, W., ''(The Texas Type Locomotive )''. Retrieved January 1, 2003〕 Some 2-10-4 tank locomotives also existed in eastern Europe. One bizarre experimental 2-10-4, built in the Soviet Union, had an opposed piston drive system. 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「2-10-4」の詳細全文を読む スポンサード リンク
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