| NRE 3GS21B | |
|---|---|
| A new NRE 3GS21B locomotive in the Union Pacific scheme. | |
| Power type | Diesel-electric |
| Builder | National Railway Equipment (NREC) |
| Model | 3GS21B |
| Build date | December 2006 – Present |
| Total produced | 181 |
| Gauge | 4 ft 8 1⁄2 in (1,435 mm) |
| Prime mover | Cummins QSK19C (×3) |
| Engine type | Straight-six engine |
| Aspiration | Turbocharger |
| Cylinders | 6 (×3) |
| Power output | 2,100 hp (1,570 kW) |
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 700 horsepower (522 kW) and creating a total power output of 2,100 horsepower (1,570 kW). More than 150 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.[1] In addition, one road slug model has also been produced.
| Railroad | Quantity | Road numbers | Notes |
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| BNSF Railway |
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| California Northern Railroad |
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| Canadian Pacific |
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| CSX Transportation |
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| Massachusetts Bay Transportation Authority |
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| Metro Stevedore |
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| Neptune Bulk Terminals |
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808A is the only road slug model built to date. |
| Norfolk Southern |
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| Nova Chemicals |
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| National Railway Equipment |
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| Pacific Harbor Line |
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| Union Pacific |
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| United States Army |
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| San Diego and Imperial Valley Railroad |
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| ! 181[2] |
| External images | |
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| RailPictures.Net – NRE 3GS21B photographs from RailPictures.Net. | |
| Railroad Picture Archives – Photographs of the NRE 3GS21B at Railroad Picture Archives. | |
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