NRE 3GS21B

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). Having multiple engines instead of a single prime mover, a design referred to as a "Genset," reduces overall diesel emissions and improves 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 NREC's Mount Vernon shops in Southern Illinois.[2] In addition, three road slug models have also been produced.

NRE 3GS21B
A new NRE 3GS21B locomotive in the Union Pacific scheme.
Type and origin
Power typeDiesel-electric
BuilderNational Railway Equipment (NREC)
Model3GS21B
Build dateDecember 2006 (2006-12) – Present
Total produced182
Specifications
Gauge4 ft 8 1⁄2 in (1,435 mm)
Prime moverCummins QSK19C (×3)
Engine typeDiesel engine
AspirationTurbocharger
Cylinders6 (×3)
Performance figures
Power output2,100 hp (1,570 kW)
Career
OperatorsSee list

Original buyers
RailroadQuantityRoad numbersNotes
BNSF Railway
72
1220-1294
1293-1294 equipped with dynamic brakes, classified as 3GS21B-DE
California Northern Railroad
5
501-505
Canadian Pacific
2
2100-2101
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
1300-1316
Massachusetts Bay Transportation Authority
2
3248-3249
Both units equipped with dynamic brakes, classified as 3GS21B-DE
Metro Stevedore[3]
1
805
Equipped with dynamic brakes, classified as 3GS21B-DE
Neptune Bulk Terminals[4]
2
805-805A, 808-808A, 809-809A
805A, 808A and 809A are the only road slug model built to date.
Norfolk Southern
2
300-301
Nova Chemicals
2
9120-9121
National Railway Equipment
7
2008-2009, 2011, 2013–2015, & 2020
Demonstration Units
Pacific Harbor Line
4
30-31 & 33-34
Tacoma Rail
1
2100[5]
Union Pacific
59
Y2701-Y2760
United States Army
7
6500-6506
San Diego and Imperial Valley Railroad
2
SDIY 701-702
Total182[6]

See also

References
  1. http://www.nationalrailway.com/nviro.asp
  2. Train Web: Gensets Gen-set switchers by National Railway Equipment.
  3. Metro Ports
  4. Neptune Terminals
  5. Tacoma Rail Locomotives Tacoma Rail Acquires Eco-friendly Locomotives.
  6. Train Web: Gensets Roster information on NREC 3GS21B engines.
External images
RailPictures.Net – NRE 3GS21B photographs from RailPictures.Net.
Railroad Picture Archives – Photographs of the NRE 3GS21B at Railroad Picture Archives.
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