ALCO RSD-4 Diesel-Electric Road Switcher Locomotive
The ALCO RSD-4 was a diesel-electric locomotive of the road switcher type rated at 1,600 horsepower (1.2 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-3, though the six-motor design allowed better tractive effort at lower speeds. Due to the inadequate capacity of the main generator, this model was later superseded in production by the ALCO RSD-5.
Railroad: Atchison, Topeka and Santa Fe Railway
Road Numbers: 2100–2109
Railroad: Chicago and North Western Railway
Road Numbers: 1515–1517, 1619–1620
Central Railroad of New Jersey
Road Numbers: 1601–1614
Railroad: Kennecott Copper Corporation
Railroad: Utah Railway
Road Numbers: 300–305
The only ALCO RSD-4 that has survived is Kennecott Copper Corporation #201. As of 2007, it resides in fully restored condition at the Northwest Railway Museum (formerly known as the Puget Sound & Snoqualmie Valley Railway) in Snoqualmie, Washington, wearing a coat of bright orange paint.
ALCO RSD-4 Overview
Type and origin
Power type: Diesel-electric
Model: RSD-4 (Specification E1663)
Build date: 1951–1952
Total produced: 36
AAR wheel arrangement: C-C
Gauge: 4 ft 8 1⁄2 in (1,435 mm) standard gauge
Trucks: ALCO trimount
Wheel diameter: 40 in (1,000 mm)
Minimum curve: 21° (274.37 ft or 83.63 m)
Wheelbase: 42 ft 3 in (12.88 m)
Length: 56 ft 6 in (17.22 m)
Width: 10 ft 1 7⁄8 in (3.096 m)
Height: 14 ft 5 1⁄4 in (4.401 m)
Locomotive weight: 278,860 lb (126,490 kg)
Fuel capacity: 800 US gal (3,000 L)
Prime mover: Alco 244
RPM range: 1000 (max)
Engine type: V12 Four-stroke engine diesel
Displacement: 8,016 cu in (131.36 L)
Generator: GE 5GT-581A1
Traction motors: (6) GE 5GE752-C1
Cylinder size: 9 in × 10.5 in (229 mm × 267 mm)
Power output: 1,600 hp (1.2 MW)
Tractive effort: 69,700 lb (31,600 kg)
Kennecott Copper Corporation locomotive 201 on display at Snoqualmie Depot, Snoqualmie, Washington. Built 1951 by ALCO, this is a model RSD-4 diesel-electric locomotive: a 12-cylinder diesel engine drives an electric generator. By Joe Mabel, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=2744873
Another view of Kennecott Copper Corporation locomotive 201 on display at Snoqualmie Depot, Snoqualmie, Washington, USA.
By Joe Mabel, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=2744871
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Text: wikipedia.org. Images: Public Domain; http://www.commons.wikimedia.org (unless otherwise specified) and 17 U.S. Code § 107 fair use. References: Lewis, Robert G. The Handbook of American Railroads. New York: Simmons-Boardman Publishing Corporation, 1951, 2nd Edition 1956. Site Map Contact webmaster HERE.