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The NRE 3GS21C is a low-emissions diesel genset locomotive built by National Railway Equipment (NRE). 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). Instead of a single prime mover, the NRE genset locomotive has three engines that each can be turned off or on as power is needed reducing overall diesel emissions and improving fuel efficiency.[1] At least 27[2][3] 3GS21C genset locomotives have been produced to date at NRE's Mount Vernon shops in Southern Illinois.[4]

NRE 3GS21C
Type and origin Power type Diesel-electric Builder National Railway Equipment (NRE) Model 3GS21C Build date 2008 (2008) – Present Total produced 27
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)

Original buyers

Railroad	Quantity	Road numbers	Notes
BNSF Railway	16	1300-1316[5]	ex-GN and ex-ATSF EMD SD40, SD45 and SD45-2
Dallas, Garland & Northeastern Railroad	3	2000-2002[6]	ex-UP EMD SD24
Norfolk Southern	1	3850[7]	Built in 2008. Ex-Norfolk Southern 3188 EMD SD40[8]
Pacific Harbor Line	2	80-81[9]	The first 3GS21C built, in Jan. 2008[10]
Indiana Harbor Belt Railroad	4	2160-2163[11]	2012
CSX Transportation	1	1600[12]
Total

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 or 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 widely used for non-railway applications, and spare parts are readily available.[13]

See also

• NRE 3GS21B

References

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