ALCO RSD-12

ALCO RSD-12

Ferrocarril del Pacifico 504 in Nogales, Sonora, Mexico, in March 1979

Type and origin Power type Diesel-electric Builder American Locomotive Company Montreal Locomotive Works Model RSD-12 Build date April 1956 – March 1963

Specifications AAR wheel arr. C-C Gauge 4 ft 8 1⁄2 in (1,435 mm) standard gauge Prime mover Alco 251B Engine type V12 Four-stroke diesel Aspiration Turbocharged Cylinders 12

Performance figures Power output 1,800 hp (1,300 kW)

The ALCO RSD-12 was a diesel-electric locomotive of the road switcher type rated at 1,800 horsepower (1.34 MW), that rode on three-axle trucks, having an C-C wheel arrangement.

Used in much the same manner as its four-axle counterpart, the ALCO RS-11, though the six-motor design allowed better tractive effort at lower speeds.