National Railway Equipment genset switchers

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Model	Owners	Numbers	Notes:
2GS14B	DGNO FWWR NRE Union Pacific	140-141 2013-2014 2007 Y2005	NRE gave the market its first genset locomotive with the UPY 2005, but much has changed since the little center-cab unit rolled out. Present models look more akin to the 3GS21B, with a shorter hood and one less stack owing to the one less engine. NRE demonstrator 2007 and Fort Worth and Western's pair are built on recycled EMD GP frames, while the two for Dallas, Garland and Northeastern are built on all-new frames.
3GS21B	BNSF CSX Transportation Norfolk Southern NRE Pacific Harbor Line Union Pacific US Army	1220-1292 1300-1301 300-301 2008-2011 30-33 Y2701-2760 6500-6501	The 3GS21B model uses three Cummins QSK-19 diesel engines for a total horsepower of 2,100. Unlike the 2GS14B, all of the 3GS21's have been built on completely new frames, using little more than recycled trucks in the construction. The easiest way to tell the GS21 from the GS14 is by counting stacks. Both models have one exhaust stack per engine.
3GS21C	Norfolk Southern Pacific Harbor Line	2 units? 80	The first two units of this type are under construction at NRE Mt. Vernon. Like the other units, the 3GS21C uses a trio of Cummins QSK-19's. The original units ride on recycled EMD SD frames. They have a much larger appearance than the 3GS21B, with a bulge at the back of the hood for dynamics, and a bulge at the front of the hood that covers the location of the center back windows.

For corrections, questions or to contribute photos, please e-mail me at: potb101@aim.com. Thanks!