The RP20BD is a
diesel-electric switcher locomotive
A switcher locomotive (American English), shunter locomotive (British English), station pilot (British English), or shifter locomotive (Pennsylvania Railroad terminology) is a locomotive used for maneuvering railway vehicles over short distanc ...
built by
Railpower Technologies. 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
Shunting locomotives
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