Baldwin DRS-4-4-1000 Diesel-Electric Road Switcher Locomotive
The Baldwin DRS-4-4-1000 was a diesel-electric road switcher produced by the Baldwin Locomotive Works from July, 1948–March, 1950. The units featured a 1,000 horsepower (750 kW), six-cylinder prime mover, and were configured in a B-B wheel arrangement mounted atop a pair of two-axle AAR Type-B road trucks, with all axles powered. They had a cast steel frame. The units were configured to normally run with the long hood in the forward position.

Only 9 were built for American railroads, with another 13 manufactured in January and February, 1949 by the Canadian Locomotive Company for the Esquimalt and Nanaimo Railway, the first railroad in Canada to dieselize its locomotive fleet. The DRS-4-4-1000 was (in most cases) visually indistinguishable from its 1,200 horsepower (890 kW) successor, the Baldwin RS-12. Only one intact example of the DRS-4-4-1000 is known to exist today (former CPR No. 8000), and is currently on display in Calgary, Alberta.

Units produced by Baldwin Locomotive Works (1948–1950)

Pennsylvania Railroad
Quantity: 6
Road numbers: 5591–5594, 9276, 9277

Tennessee Central Railway
Quantity: 3
Road numbers: 75–77

Units produced by the Canadian Locomotive Company (1949)

Canadian Pacific Railway
Quantity: 13
Road numbers: 8000–8012 (units worked the Esquimalt and Nanaimo Railway) 8000 preserved and on display.

Baldwin DRS-4-4-1000 Overview
Type and origin
Power type: Diesel-electric
Builder: Baldwin Locomotive Works
Model: DRS-4-4-10
Build date: July 1948 — March 1950
Total produced: 22

AAR wheel arrangement: B-B
Gauge: 4 ft 8 1⁄2 in (1,435 mm) standard gauge
Prime mover: 606SC
RPM range: 625 rpm maximum
Engine type: Straight-6 Four-stroke diesel
Aspiration: Turbocharger
Displacement: 1,979 cu in (32.43 L) per cylinder
Displacement: 11,874 cu in (194.58 L) total
Generator: DC generator
Traction motors: DC traction motors
Cylinders: 6
Cylinder size: 12 3⁄4 in × 15 1⁄2 in (324 mm × 394 mm)
Transmission: Electric
Locomotive brake: Straight air
Train brakes: Air
Performance figures
Power output: 1,000 hp (750 kW)
Locale: North America

See also:

Baldwin Diesel Locomotives

Diesel Locomotives

Baldwin Locomotive Works

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Canadian Pacific Railway No. 8010.

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