SD49 - MagnumMacKivler/RLCPT2 GitHub Wiki
A modified ex Alaska Railroad GP49, now 6 axle Ferronor, is perhaps a sole look at what the SD49 could have been. Photo credit Allen Miller
The SD49 was an unproduced V12 version of the V16 SD50 offered in EMD's catalog at the time. This locomotive stands as a paper engine, as no customers wanted to purchase a high horsepower V12 equipped locomotive (as the country in the 1980s had well recovered from the 1970s fuel crisis that sparked the need for a 12 cylinder, 6-axle locomotives anyways), especially with the notorious problems of the 645F engine.
However, the information provided below can help those who want to have such a locomotive on their roster, especially those with other 12-645 engines like the GP49 and SD39-2 (which was also simply cataloged but never made).
PT-Specific Information
| General Info | - |
|---|---|
| Prime Mover | EMD 12-645F3B |
| Horsepower | 2800 |
| Truck Type | EMD HTC |
| Axles | 6 |
| Traction Motors | 6 |
| Minimum Weight | 368000 lbs |
| Maximum Weight | 420000 lbs ⚠ |
| Model Base Speed | 70 MPH |
| Top Speed | 70, 76, 82, or 88 MPH |
| Electrical System | - |
|---|---|
| Generator Max Current | 9900 Amps |
| Max Traction Motor (TM) Current | 1650 Amps |
| Max Continuous TM Current | 1170 Amps |
| Traction Motor Type | DC |
| Factor of Adhesion | 27% |
| Transition Mode | Automatic, no selector |
| Transition Groups | 1 |
| Transition Shunts | 1 |
| Generator Transition | Yes |
| Traction Control | APR + Sand |
| Dynamic Braking (DB) Mode (if used) | Mechanical Blowers |
| DB Max Current | 760 Amps |
| DB Max Continuous Current | 760 Amps |
| 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 | 26-L |
| Compressor CFM | 269.2 (WBO @ 954 RPM) |
| Main Reservoir Volume | 35 Cubic Feet |
Notes
⚠: Not Verified or Educated Guess