NRE 3GS21C

Type and origin
Power type	Diesel-electric
Builder	National Railway Equipment (NREC)
Model	3GS21C
Build date	2008 (2008) – Present
Total produced	16

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

The NRE 3GS21B is a low-emissions diesel road 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). At least 16^[1]^[2] 3GS21C genset locomotives have been produced to date at NREC's Mount Vernon shops in Southern Illinois.^[3]

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 engine.
The QSK19C engines from Cummins is widely used for non-railway applications, and spare parts are readily available.^[4]

↑ Zmudzinski, Lester (August 1, 2011). "Photo: CSXT 1600". RailPictures.net.
↑ "BNSF Locomotive Roster". The Diesel Shop.
↑ "National Railway Equipment". Train Web.
↑ Cummins Marine (August 2002). "Bulletin 4000084: QSK19-M" (PDF). Archived from the original (PDF) on April 12, 2013.

Low emissions locomotives

Altoona Works	BP4 GP33ECO

Brandt Road-Rail	Prototype

Brookville Equipment	BL12CG BL14CG BL20CG BL20G BL20GH BL36PH

Electro-Motive Diesel	F125 GP15D GP20D GP22ECO GT38ACe SD22ECO SD32ECO SD70ACe SD70M-2

GE Transportation Systems	ES40DC ES44AC ES44C4 ES44DC

MotivePower, Inc.	MP14B MP20B MP20C MP21B MP36PH-3C MP36PH-3S MP40PH-3C HSP46

National Railway Equipment	1GS7B 2GS14B 3GS21B 3GS21C 2GS36C-DE

Progress Rail Services	PR15B PR22B PR30C PR43C

Railpower Technologies	GGS2000D GG10B GG20B GK10B RP14BD RP20BH RP20BD RP20CD RP27CD

Siemens Mobility	Siemens Charger

See also: List of low emissions locomotives

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