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Under the Whyte notation for the classification of steam locomotives by wheel arrangement, a is a locomotive with one pair of unpowered leading wheels, followed by two sets of three pairs of powered driving wheels, and one pair of trailing wheels. The wheel arrangement was principally used on Mallet-type articulated locomotives, although some tank locomotive examples were also built. A Garratt type locomotive with the same wheel arrangement is classified as . Other equivalent classifications are: * UIC classification: 1CC1 (also known as German and Italian classifications) * French classification: 130+031 * Turkish classification: 34+34 * Swiss classification: 3/4+3/4 * Russian classification: 1-3-0+0-3-1 Under the UIC classification the wheel arrangement is referred to as (1'C)C1' for Mallet locomotives. ==Overview== The 2-6-6-2 wheel arrangement was most often used for articulated compound steam Mallet locomotives. In a compound Mallet, the rear set of coupled wheels are driven by the smaller high pressure cylinders, from which spent steam is then fed to the larger low pressure cylinders that drive the front set of coupled wheels.〔Compounding Steam Engines〕 This type of locomotive was commonly used in North America on logging railroads. The 2-6-6-2 wheel arrangement was also used in the Soviet Union and in South Africa. 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「2-6-6-2」の詳細全文を読む スポンサード リンク
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