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 27 3GS21C genset locomotives have been produced to date at NREC's Mount Vernon shops in Southern Illinois.
||ex-GN EMD SD40 and SD45-2|
|Dallas, Garland & Northeastern Railroad||
||ex-UP EMD SD24|
||Built in 2008. Ex-Norfolk Southern 3188 EMD SD40|
|Pacific Harbor Line||
||The first 3GS21C built, in Jan. 2008|
|Indiana Harbor Belt Railroad||
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.
- Zmudzinski, Lester (August 1, 2011). "Photo: CSXT 1600". RailPictures.net.
- "BNSF Locomotive Roster". The Diesel Shop.
- "National Railway Equipment". Train Web.
- Burlington Northern Santa Fe Roster information on BNSF - Motive Power. Revised: 11 Dec. 2016.
- Dallas Garland & Northeastern Roster information on DGNO Present & Past Power. Revised: 6 Feb. 2016.
- 3GS21CDB NS 3850 NS Norfolk Southern Roster Locomotive.
- NREC 3GS21C NS 3188 Norfolk Southern.
- Pacific Harbor Line Locomotives (past & present) Revised: 15 Nov. 2015.
- PHL 3GS21C PHL 80 Pacific Harbor Line.
- All Time - Indiana Harbor Belt Railroad Diesel Locomotive Roster NRE 3GS21C "gensets" Revised: Jan. 2013.
- CSX Motive Power * * * Yard Power * * * Updated: 11 Dec. 2016
- Cummins Marine (August 2002). "Bulletin 4000084: QSK19-M" (PDF). Archived from the original (PDF) on April 12, 2013.
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