ALCO RSD-12

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ALCO RSD-12
ALCo RSD-12 (9194229140).jpg
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)

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 a C-C wheel arrangement.

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.

Original buyers[edit]

Railroad Quantity Road numbers Notes
Chesapeake and Ohio Railway
10
6700–6709
Renumbered 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 Railroad
4
1801–1804
New York, Chicago and St. Louis Railroad (“Nickel Plate Road”)
9
325–333
to Norfolk and Western Railway
Pennsylvania Railroad
25
8655–8679
to 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.
Southern Pacific Company
21
7000–7020
Renumbered 2950–2970, rebuilt from RSD-5 locomotives with a new motor and carbody, retaining generators and bogeys[1]
Ferrocarril del Pacífico
19
1502–1508, 509–520
Ferrocarriles Nacionales de México
73
7400–7472
Companhia Siderúrgica Nacional (Brazil)
10
3501–3510
Built by MLW, 1,600 mm (5 ft 3 in); to RFFSA pt:ALCo RSD-12
Total 171

See also[edit]

References[edit]

  1. ^ Percy, Richard. "Southern Pacific RSD-12 Info Page." Obtained 5/8/18.
  • Komanesky, John et al. The Diesel Shop. Retrieved July 3, 2008
  • Pinkepank, Jerry A. (1973). The Second Diesel Spotter's Guide. Milwaukee, Wisconsin: Kalmbach Publishing. pp. 257–258. ISBN 978-0-89024-026-7.