| Baldwin DS-4-4-660 | |
| Powertype: | Diesel-electric |
| Builder: | Baldwin Locomotive Works |
| Builddate: | June 1946 to May 1949 |
| Totalproduction: | 139 |
| Aarwheels: | B-B |
| Length: | 46feet |
| Width: | 9feet |
| Height: | 142NaN2 |
| Locoweight: | 196600lb |
| Primemover: | 606NA |
| Rpmrange: | 625 rpm max. |
| Enginetype: | Four-stroke diesel |
| Aspiration: | Normally aspirated, solid injection |
| Displacement: | 1979cuin per cylinder 11874cuin total |
| Cylindercount: | Straight-6 |
| Cylindersize: | NaN×) |
| Generator: | DC type 480 |
| Tractionmotors: | West’hse 362-D |
| Poweroutput: | 660hp |
| Tractiveeffort: | 56500lb |
| Trainbrakes: | Air |
| Locobrakes: | Air |
| Locale: | North America |
The Baldwin DS-4-4-660 was a four-axle diesel-electric switcher locomotive built by the Baldwin Locomotive Works at it Eddystone, Pennsylvania factory between 1946 and 1949. It replaced the VO-660 in their catalog, and was in turn replaced by the DS-4-4-750. It was the low power companion to Baldwin's DS-4-4-1000 models.
| Railroad | Quantity | Road numbers | Notes |
|---|---|---|---|
| 1 | 13 | ||
| 1 | 1001 | ||
| 3 | 661–663 | 661 scrapped, 662 and 663 survive in Roanoke, VA. | |
| Chicago, St. Paul, Minneapolis and Omaha Railway (“Omaha Road”) | 1 | 71 | |
| 3 | 1259–1261 | ||
| 1 | 1 | ||
| 1 | 101 | ||
| 5 | 381–385 | ||
| 1 | 102 | ||
| 4 | 409–412 | ||
| 6 | 44–49 | ||
| 3 | 661–663 | ||
| 4 | 306–309 | ||
| 99 | 5957–5966, 9000–9049, 9110–9121, 9210–9236 | PRR Class BS-6a | |
| 1 | 30 | ||
| 1 | 100 | ||
| 2 | 201–202 | ||
| 1 | D100 | ||
| 1 | 104 | ||
| Total | 139 | ||