The RP20BD is a diesel-electric

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 inten ...

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. RP20BDs are rebuilt from older locomotives such as the General Electric Dash 7 series and EMD General Purpose series.

References

B-B 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