The ALCO RSC-1 was a diesel-electric locomotive of the road switcher type rated at 1000 horsepower (750 kW) that rode on three-axle trucks having an A1A-A1A wheel arrangement.Used in much the same manner as its four-axle counterpart the ALCO RS-1 though the axle load was distributed for operation on light rail such as are found on branch lines.
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