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
- Dorin, Patrick C. (1972). Chicago and North Western Power. Burbank, California: Superior Publishing. p. 158. ISBN 0-87564-715-4.
- Kirkland, John F. (November 1994). The Diesel Builders volume 3: Baldwin Locomotive Works. Pasadena, California: Interurban Press. ISBN 0-916374-93-9.
- Pinkpank, Jerry A (1973). The Second Diesel Spotter's Guide. Kalmbach Books. pp. 282, 287. ISBN 0-89024-026-4.