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The Baldwin DRS-4-4-1500 was a diesel-electric locomotive of the road switcher type rated at 1,500-horsepower (1,100 kW), that rode on two-axle trucks, having a B-B wheel arrangement. It was manufactured by Baldwin Locomotive Works from 1947 until it was replaced in 1950 by the 1,600-horsepower (1,200 kW) AS-16.

This article relies largely or entirely on a single source. (February 2015)

Baldwin DRS-4-4-1500
Type and origin Power type Diesel-electric Builder Baldwin Locomotive Works Model DRS-4-4-1500 Build date July 1947–May 1950 Total produced 35
Specifications Configuration: ​  • AAR B-B  • UIC Bo′Bo′ Gauge 4 ft 8+1⁄2 in (1,435 mm) standard gauge Length 57 ft 10+3⁄4 in (17.65 m) Height 14 ft (4.27 m) Loco weight 120 short tons (107 long tons; 109 t) Prime mover Baldwin 608SC Engine type Four-stroke diesel Aspiration Turbocharged Displacement 15,832 cu in (259.44 L) Alternator Westinghouse YG42A Generator Westinghouse 471A Traction motors Westinghouse 370F (4) Cylinders 8 Cylinder size 12+3⁄4 in × 15+1⁄2 in (324 mm × 394 mm) Transmission Electric Loco brake Straight air Train brakes Air
Performance figures Maximum speed 65 mph (105 km/h) Power output 1,500 hp (1,100 kW) Tractive effort 61,510 lbf (273.61 kN)

Nine railroads bought 35 locomotives, with five railroads later buying the successor model.

Railroad	Quantity	Road Numbers	Notes
Erie Railroad	6	1100–1105
Lehigh Valley Railroad	1	200
Iron Mines of Venezuela (Bethlehem Steel Company)	3	1–3
Minneapolis, St. Paul and Sault Ste. Marie Railroad ("Soo Line")	8	360–367
Missouri Pacific Railroad (St. Louis, Brownsville and Mexico Railway)	4	4112–4115
New York Central Railroad	2	7300–7301
Northern Pacific Railway	2	175–176	Renumbered 500–501 to Burlington Northern 405-406
Pennsylvania-Reading Seashore Lines	6	6000–6005
Western Maryland Railway	3	170–172
Total	35

References

• Kirkland, John F. (November 1994). The Diesel Builders volume 3: Baldwin Locomotive Works. Interurban Press. ISBN 0-916374-93-9.

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