NRE 3GS21B

Diesel genset locomotive

NRE 3GS21B

A new NRE 3GS21B locomotive in the: Union Pacific scheme.

Type and origin
Power type	Diesel-electric
Builder	National Railway Equipment (NRE)
Model	3GS21B
Build date	December 2006 (2006-12) – Present
Total produced	182

Specifications
Gauge	4 ft 8+1⁄2 in (1,435 mm)
Prime mover	Cummins QSK19C (×3)
Engine type	Diesel engine (×3)
Aspiration	Turbocharger (×3)
Cylinders	6 (×3)

Performance figures
Power output	2,100 hp (1,570 kW)

Career
Operators	See list

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 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. 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. In addition, three road slug models have also been produced.

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/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 locomotive.
The QSK19C engine is also widely used for non-railway applications, and spare parts are readily available.

Original buyers※

Railroad	Quantity	Road numbers	Notes
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	1	805	Equipped with dynamic brakes, classified as 3GS21B-DE
Neptune Bulk Terminals	3	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
Union Pacific	59	Y2701-Y2760
United States Army	7	6500-6506
San Diego and Imperial Valley Railroad	2	SDIY 701-702
Total	182

A brand new 3GS21B locomotive painted for the BNSF Railway.
An NRE 3GS21B leads a Union Pacific train along street running trackage at Anaheim, California.
Two brand new U.S. Army 3GS21B locomotives working at Fort Lewis, Washington.
Brand new MBTA 3GS21B-DE at South Station.
MBTA 3GS21B-DE on the Grand Junction Railroad.

References※

^ "N-Viromotive new locomotive". www.nationalrailway.com. Archived from the original on 2007-09-01.
^ Train Web: Gensets Gen-set switchers by National Railway Equipment.
^ Cummins Marine (August 2002). "Bulletin 4000084: QSK19-M" (PDF). Archived from the original (PDF) on April 12, 2013.
^ Metro Ports
^ Neptune Terminals
^ Tacoma Rail Locomotives Tacoma Rail Acquires Eco-friendly Locomotives.
^ Train Web: Gensets Roster information on NREC 3GS21B engines.

External links※

External images
RailPictures.Net – NRE 3GS21B photographs from RailPictures.Net.
Railroad Picture Archives – Photographs of the NRE 3GS21B at Railroad Picture Archives.