NRE 3GS21B | |||||||||||||
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A new NRE 3GS21B locomotive in the Union Pacific scheme.
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The NRE 3GS21B is a low-emissions diesel genset locomotive built by National Railway Equipment (NRE). Instead of a single prime mover, the NRE genset locomotive is powered by three separate 700 horsepower (522 kW) Cummins QSK19C engines providing a total power output of 2,100 horsepower (1,570 kW). Each engine could be individually started or shut off depending on load reducing overall diesel emissions and improving fuel efficiency.[1] More than 150 of the 3GS21B genset locomotives have been produced to date, with the majority of these units being manufactured at NRE's Mount Vernon shops in Southern Illinois.[2] In addition, three road slug models have also been produced.
Because the engines are modular, flexibility is obtained:
Railroad | Quantity | Road numbers | Notes |
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BNSF Railway |
72
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1220-1294
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1293-1294 equipped with dynamic brakes, classified as 3GS21B-DE |
California Northern Railroad |
5
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501-505
|
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Canadian Pacific |
2
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2100-2101
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Both units equipped with dynamic brakes, classified as 3GS21B-DE, 2100 retired 5/13, 2101 retired 6/13 (both returned to NRE). |
CSX Transportation |
16
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1300-1316
|
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Massachusetts Bay Transportation Authority |
2
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3248-3249
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Both units equipped with dynamic brakes, classified as 3GS21B-DE |
Metro Stevedore[4] |
1
|
805
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Equipped with dynamic brakes, classified as 3GS21B-DE |
Neptune Bulk Terminals[5] |
3
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805-805A, 808-808A, 809-809A
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805A, 808A and 809A are the only road slug model built to date. |
Norfolk Southern |
2
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300-301
|
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Nova Chemicals |
2
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9120-9121
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National Railway Equipment |
7
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2008-2009, 2011, 2013–2015, & 2020
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Demonstration Units
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Pacific Harbor Line |
4
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30-31 & 33-34
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Tacoma Rail |
1
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2100[6]
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Union Pacific |
59
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Y2701-Y2760
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United States Army |
7
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6500-6506
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San Diego and Imperial Valley Railroad |
2
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SDIY 701-702
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Total | 182[7] |
External images | |
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Low emissions locomotives in North America
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Altoona Works |
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Brookville Equipment |
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GE Transportation |
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Knoxville Locomotive Works |
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MotivePower |
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National Railway Equipment |
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Progress Rail |
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Railpower Technologies |
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Siemens Mobility |
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See also: List of low-emissions locomotives in North America |