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British Rail reserved the TOPS Class 97 designation for departmental locomotives, which were used for special or engineering duties. They were therefore of several different classes, lumped together for numbering purposes. Some locomotives were converted from redundant engines, whilst others were purpose built. In 2008, Network Rail once again used Class 97 for signalling test locomotives (Class 97/3). ==Allocation of numbers== Class 97 numbers were allocated in one of three ways: * Application of 97 prefix to pre-TOPS number - e.g. Western Region shunters PWM 650–654 became 97650–97654. * TOPS class number replaced by 97 prefix - e.g. Former Class 47 locomotive 47472 became 97472. * Allocation of number in a series commencing from 97x01, where x represented the engine power Type (1 to 5), '7' for ex-multiple unit conversions and '8' for diesel shunters. 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「British Rail Class 97」の詳細全文を読む スポンサード リンク
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