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In the Whyte notation for the classification of steam locomotives by wheel arrangement, the is a Garratt articulated locomotive. The wheel arrangement is effectively two 4-6-4 locomotives operating back to back, with the boiler and cab suspended between the two engine units. Each engine unit has two pairs of leading wheels in a leading bogie, followed by three coupled pairs of driving wheels, with two pairs of trailing wheels in a trailing bogie. Since the 4-6-4 type is sometimes known as a Baltic or Hudson, the corresponding Garratt type could be referred to as a Double Baltic or Double Hudson. Other equivalent classifications are: * UIC classification: 2C2+2C2 (also known as German and Italian classifications) * French classification: 232+232 * Turkish classification: 37+37 * Swiss classification: 3/7+3/7 up to the early 1920s, later 6/14 ==Overview== This was the fifth most common Garratt wheel arrangement, with 84 examples constructed, 74 by Garratt patent owner Beyer, Peacock and ten under sub-contract from Beyer, Peacock by Belgian manufacturer Société Franco-Belge de Matériel de Chemins de Fer in 1952.〔〔 Only two railway systems used this wheel arrangement. These were the Sudan Railways with ten examples of the 250 class, and the Rhodesia Railways, now the National Railways of Zimbabwe, who owned 74, split between 44 of the 15th class and thirty of the 15A class.〔 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「4-6-4+4-6-4」の詳細全文を読む スポンサード リンク
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