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The NRE 3GS21B is a low-emissions diesel road switcher locomotive built by National Railway Equipment. It is powered by three Cummins QSK19C I6 engines with each one developing and creating a total power output of . At least 16〔(CSXT 1600 ) includes link to more photos〕〔(BNSF Locomotive Roster )〕 3GS21C genset locomotives have been produced to date at NREC's Mount Vernon shops in Southern Illinois.〔(Train Web: Gensets ) Gen-set switchers by National Railway Equipment.〕 == Flexibility == Because the engines are modular, flexibility is obtained: * If one engine fails, the others can continue at reduced power. * If a lower axle load is needed, one engine can be left off. * When reduced power is needed, one or more of the engines can be turned off, saving fuel and wear and tear. * The QSK19C engine is common to the four variants of the NRE 3GS21C engine. * The QSK19C engines from Cummins is widely used for non-railway applications, and spare parts are readily available.〔http://www.cummins.rs/pocetna_stranica_files/qsk19m.pdf〕 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「NRE 3GS21C」の詳細全文を読む スポンサード リンク
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