NRE 3GS21C

Specifications
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)

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

NRE 3GS21C
NRE 3GS21C
Power type
Type and origin
Power type	Diesel-electric
Builder	National Railway Equipment (NRE)
Model	3GS21C
Build date	2008 – Present
Total produced	27
Gauge
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)
Power output
Performance figures
Power output	2,100 hp (1,570 kW)

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. At least 27 3GS21C genset locomotives have been produced to date at NRE's Mount Vernon shops in Southern Illinois. The main difference between this and the NRE 3GS21B is that these units are on C-C (six wheel) trucks and the others are on B-B (four wheel) trucks.