SW1200 - MagnumMacKivler/RLCPT2 GitHub Wiki
Colorado and Southern/ATSF #159 sits in Denver, Colorado. This unit has a very long life ahead of it, being retired in 2007! Photo credit Craig Garver
The EMD SW1200 was the direct replacement to the SW9. Introduced in late 1953 as part of the revised 567 line, the SW1200 was one of the most successful EMD switchers of all time. Selling over 1000 units, the SW1200 represented the apex of 18 years of refined design; as with the rest of the 567 line, most units saw prosperous lives and long secondary careers. The SW1200 (along with the SW600 and SW900 ) was sold well after the end of normal 567 locomotive production ended so that the 645 switchers (the SW1000 and SW1500 ) could be fully tested; upon their release, the SW1200 was discontinued.
PT-Specific Information
| General Info | - |
|---|---|
| Prime Mover | V12-567C |
| Horsepower | 1200 |
| Truck Type | AAR Type A (1) |
| Axles | 4 |
| Traction Motors | 4 |
| Minimum Weight | 235,000 lbs ⚠ |
| Maximum Weight | 245,000 lbs |
| Model Base Speed | 45 MPH (1) |
| Top Speed | 45 MPH (1) |
| Electrical System | - |
|---|---|
| Generator Max Current | 3000 Amps |
| Max Traction Motor (TM) Current | 1500 Amps |
| Max Continuous TM Current | 900 Amps ⚠ |
| Traction Motor Type | DC |
| Factor of Adhesion | 25% |
| Transition Mode | Service Selector |
| Transition Groups | 2, 2, 1, 1 |
| Transition Shunts | 1, 0.53, 1, 0.53 ⚠ |
| Generator Transition | No |
| Traction Control | APR |
| Dynamic Braking (DB) Mode (if used) | N/A |
| DB Max Current | N/A |
| DB Max Continuous Current | N/A |
| Blended Braking | No |
| Miscellaneous | - |
|---|---|
| Head-End Power (HEP) | No |
| HEP Power Consumption | N/A |
| HEP Standby/Run Mode | N/A |
| Load Ramp Speed | 2 Amps/Tick ⚠ |
| TM Overload Protection | No |
| Starter Mode | Manual Primer, Manual Start |
| Air Brake Schedule | 6BL (USA) or 6SL (CAN) (2) |
| Compressor CFM | 216 (Gardner Denver WBO @ 800 RPM ) |
| Main Reservoir Volume | 22 Cu.Ft |
Notes
⚠: Not Verified or Educated Guess
(1): The Flexicoil B was optional; if a unit was equipped with it, its base speed would be 65 and top speed 65.
(2): 26L was optional after its introduction in 1956.