Baldwin DRS-4-4-1500

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 from 1947 until it was replaced in 1950 by the 1,600-horsepower (1,200 kW) AS-16.

Baldwin DRS-4-4-1500
Type and origin
Power typeDiesel-electric
BuilderBaldwin Locomotive Works
ModelDRS-4-4-1500
Build dateJuly 1947–May 1950
Total produced35
Specifications
Configuration:
​
 • AARB-B
 • UICBo′Bo′
Gauge4 ft 8 1⁄2 in (1,435 mm)
Length57 ft 10 3⁄4 in (17.65 m)
Height14 ft (4.27 m)
Loco weight120 short tons (107 long tons; 109 t)
Prime moverBaldwin 608SC
Engine typeFour-stroke diesel
AspirationTurbocharged
Displacement15,832 cu in (259.44 L)
GeneratorDC generator
Traction motorsDC traction motors
Cylinders8
Cylinder size12 3⁄4 in × 15 1⁄2 in (324 mm × 394 mm)
TransmissionElectric
Loco brakeStraight air
Train brakesAir
Performance figures
Maximum speed65 mph (105 km/h)
Power output1,500 hp (1,100 kW)
Tractive effort61,510 lbf (273.61 kN)

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

RailroadQuantityRoad NumbersNotes
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
Pennsylvania-Reading Seashore Lines
6
6000–6005
Western Maryland Railway
3
170–172
Total35

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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