ALCO RSD-4

ALCO RSD-4

Kennecott Copper Corporation locomotive 201 on display at Snoqualmie Depot, Snoqualmie, Washington

Type and origin Power type Diesel-electric Builder ALCO Model RSD-4 (Specification E1663) Build date 1951–1952 Total produced 36

Specifications AAR wheel arr 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 Height Loco 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 Aspiration Turbocharger Displacement 8,016 cu in (131.36 L) Generator GE 5GT-581A1 Traction motors (6) GE 5GE752-C1 Cylinders 12 Cylinder size 9 in × 10.5 in (229 mm × 267 mm)

Performance figures Power output 1,600 hp (1.2 MW) Tractive effort 69,700 lb (31,600 kg)

File:Kennecott Copper Company Locomotive 201 - 2.jpg

Kennecott Copper Corporation locomotive 201 on display at Snoqualmie Depot, Snoqualmie, Washington.

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 Due to the inadequate capacity of the main generator, this model was later superseded in production by the ALCO RSD-5

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.