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The ALCO RSD-12 was a C-C diesel-electric locomotive rated at 1,800 horsepower (1.34 MW). 171 locomotives were produced 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.

ALCO RSD-12
Ferrocarril del Pacifico 504 in Nogales, Sonora, Mexico, in March 1979
Type and origin
Power typeDiesel-electric
BuilderAmerican Locomotive Company
Montreal Locomotive Works
ModelRSD-12
Build dateApril 1956 March 1963
Total produced171
Specifications
Configuration:
  AARC-C
Gauge4 ft 8+12 in (1,435 mm) standard gauge
Prime moverAlco 251B
Engine typeV12 Four-stroke diesel
AspirationTurbocharged
Cylinders12
Performance figures
Power output1,800 hp (1,300 kW)

Four examples survive today. NKP 329 is preserved as a museum display in Bellevue, OH. OERM 2954 (ex-SP 2954) and 2958 (ex-SP 2958) are preserved at OERM in Perris, California. Derelict LS&I 1804 rests in a shipyard in Escanaba, MI.


Original buyers


RailroadQuantityRoad numbersNotes
Chesapeake and Ohio Railway106700–6709Renumbered 2007–2016, 2014 and 2016 were sold to Baltimore and Ohio Railroad, then were purchased by Utah Railway on February 23, 1976.
Lake Superior and Ishpeming Railroad41801–1804
New York, Chicago and St. Louis Railroad (“Nickel Plate Road”)9325–333to Norfolk and Western Railway 2325-2333 in 1964
Pennsylvania Railroad258655–8679to Penn Central 6855–6879; then to Conrail 1101-1123 and rebuilt into Alco mt6. 14 went to Norfolk Southern and 9 to CSX 1006-1016 with two retired upon Conrail purchase. All retired in 2020.
Southern Pacific Company217000–7020Renumbered 2950–2970, rebuilt from RSD-5 locomotives with a new motor and carbody, retaining generators and bogeys[1][2]
Ferrocarril del Pacífico191502–1508, 509–520
Ferrocarriles Nacionales de México737400–7472
Companhia Siderúrgica Nacional (Brazil)103501–3510Built by MLW, 1,600 mm (5 ft 3 in); to RFFSA pt:ALCo RSD-12
Total171

See also



References


  1. Percy, Richard. "Southern Pacific RSD-12 Info Page." Obtained 5/8/18.
  2. "Southern Pacific RSD5 Info Page". espee.railfan.net. Retrieved 2019-07-28.






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