NRE 3GS21C

NRE 3GS21C
Type and origin Power type Diesel-electric Builder National Railway Equipment (NREC) Model 3GS21C Build date 2008 (2008) – Present Total produced 16
Specifications Gauge 4 ft 8+1⁄2 in (1,435 mm) Prime mover Cummins QSK19C (×3) Engine type Diesel engine Aspiration Turbocharger Cylinders 6 (×3)
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 3GS21C genset locomotives have been produced to date at NREC's Mount Vernon shops in Southern Illinois.

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.