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The NRE 3GS21B is a low-emissions diesel 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 . Having multiple engines instead of a single prime mover, a design referred to as a "Genset," reduces overall diesel emissions and improves fuel efficiency.〔http://www.nationalrailway.com/nviro.asp〕 More than 150 of the 3GS21B Genset locomotives have been produced to date, with the majority of these units being manufactured at NREC's Mount Vernon shops in Southern Illinois.〔(Train Web: Gensets ) Gen-set switchers by National Railway Equipment.〕 In addition, one road slug model has also been produced. ==Original Buyers== Image:BNSF 1291.jpg|A brand new 3GS21B locomotive painted for the BNSF Railway. Image:NRE 3GS21B UPY 2733.jpg|An NRE 3GS21B leads a Union Pacific train along street running trackage at Anaheim, California. Image:Army nviro locos.jpg|Two brand new U.S. Army 3GS21B locomotives working at Fort Lewis, Washington. Image:Mbta3gs21b.JPG|Brand new MBTA 3GS21B at South Station. Image:MBTAGenset3248.JPG|MBTA 3GS21B on the Grand Junction Railroad. 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 3GS21B」の詳細全文を読む スポンサード リンク
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