Baldwin DS-4-4-660

4 ft 8+1⁄2 in (1,435 mm)Length46 ft 6+1⁄4 in (14.18 m)Width9 ft 11+1⁄4 in (3.03 m)Height14 ft (4.27 m)Loco weight196,600 lb (89,200 kg)Prime mover606NARPM range625 rpm max.Engine typeFour-stroke dieselAspirationNormally aspirated, solid injectionDisplacement1,979 cu in (32.43 L) per cylinder
11,874 cu in (194.58 L) totalGeneratorDC type 480Traction motorsWest’hse 362-DCylindersStraight-6Cylinder size12+3⁄4 in × 15+1⁄2 in (324 mm × 394 mm))Loco brakeAirTrain brakesAir

Performance figures
Power output	660 hp (492 kW)
Tractive effort	56,500 lb (25,600 kg)

Career
Locale	North America

The Baldwin DS-4-4-660 was a four-axle 660 horsepower (490 kW) diesel-electric switcher locomotive built by the Baldwin Locomotive Works at it Eddystone, Pennsylvania factory between 1946 and 1949. It replaced the 660 horsepower (490 kW) VO-660 in their catalog, and was in turn replaced by the 750 horsepower (560 kW) DS-4-4-750. It was the low power companion to Baldwin's DS-4-4-1000 models.

Original owners

Railroad	Quantity	Road numbers	Notes
American Cyanamid Company	1	13
American Rolling Mill Company	1	1001
Chesapeake Western Railway	3	661–663	661 scrapped, 662 and 663 survive in Roanoke, VA.
Chicago, St. Paul, Minneapolis and Omaha Railway (“Omaha Road”)	1	71
Chicago and North Western Railway	3	1259–1261
Crows Nest Pass Coal	1	1
Escanaba and Lake Superior Railroad	1	101
Erie Railroad	5	381–385
Georgia Northern Railway	1	102
Long Island Rail Road	4	409–412
New Orleans Public Belt Railroad	6	44–49
Norfolk Southern Railway	3	661–663
Patapsco and Back Rivers Railroad	4	306–309
Pennsylvania Railroad	99	5957–5966, 9000–9049, 9110–9121, 9210–9236	PRR Class BS-6a
Sloss-Sheffield Steel	1	30
Tennessee Valley Authority	1	100
Wabash Railroad	2	201–202
Wyandotte Southern Railroad	1	D100
Wyandotte Terminal Railroad	1	104
Total	139

References

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