Definitions

ALCO RSD-4

ALCO RSD-4

The ALCO RSD-4 was a diesel-electric locomotive of the road switcher type rated at , 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 Due to the inadequate capacity of the main generator, this model was later superseded in production by the ALCO RSD-5

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

Preserved units

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.

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