The RP20CD is a diesel-electric

road switcher A road switcher is a type of railroad locomotive designed to both haul railcars in mainline service and shunt them in railroad yards. Both type and term are North American in origin, although similar types have been used elsewhere. A road ...

locomotive built by

Railpower Technologies Railpower Technologies is a subsidiary of R.J. Corman Railroad Group that builds environmentally friendly hybrid Green Goat and Genset switching locomotives, founded by Frank Donnelly and Gerard Koldyk. Its locomotives have been purchased by C ...

. It is a " genset" locomotive, having three engine-generator sets. The engines are computer controlled, with the computer stopping and starting engines on a rotating basis, as required to produce the horsepower needed at any given moment. It has six-wheel (three-axle)

trucks A truck or lorry is a motor vehicle designed to transport cargo, carry specialized payloads, or perform other utilitarian work. Trucks vary greatly in size, power, and configuration, but the vast majority feature body-on-frame constructi ...

, rather than the usual four-wheel (two-axle) trucks commonly found on smaller, lighter,

switcher A switcher, shunter, yard pilot, switch engine, yard goat, or shifter is a small railroad locomotive used for manoeuvring railroad cars inside a rail yard in a process known as ''switching'' (US) or ''shunting'' (UK). Switchers are not inte ...

locomotives. RP20CDs are rebuilt from older locomotives and can be upgraded to by adding a fourth generator.

References

C-C locomotives Diesel-electric locomotives of the United States Railpower locomotives EPA Tier 2-compliant locomotives of the United States Rebuilt locomotives Standard gauge locomotives of the United States Railway locomotives introduced in 2008 {{US-train-stub