ALCO RSD-4

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ALCO RSD-4

Kennecott Copper Corporation locomotive 201 on display at Snoqualmie Depot, Snoqualmie, Washington
Power type	Diesel-electric
Builder	ALCO
Model	RSD-4 (Specification E1663)
Build date	1951–1952
Total production	36
AAR wheel arr.	C-C
Gauge	4 ft 8½ in (1,435 mm)
Prime mover	Alco 244
Displacement	8,016 cu in (131.36 l)
Cylinders	V12
Cylinder size	9 in × 10.5 in (229 mm × 267 mm)
Power output	1,600 hp (1.2 MW)

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 Due to the inadequate capacity of the main generator, this model was later superseded in production by the ALCO RSD-5

[edit] Original owners

Railroad	Quantity	Road Numbers	Notes
Atchison, Topeka and Santa Fe Railway	10	2100–2109
Chicago and North Western Railway	5	1515–1517, 1619–1620
Central Railroad of New Jersey	14	1601–1614
Kennecott Copper Corporation	1	201	Preserved
Utah Railway	6	300–305
Total	36

[edit] Preserved units

The only ALCO RSD-4 that has escaped the scrapper's torch 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.

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