SD70M 2 - MagnumMacKivler/RLCPT2 GitHub Wiki
Florida East Coast SD70M-2s await a welcoming ceremony, but seem to get a typical Florida rain on their parade. Photo credit Bob Pickering
When the Enviromental Protection Agency increased emissions levels to their Tier 2 standards, the SD70M and SD70 locomotives were no longer allowed to be produced for use within the United States. Thus came the SD70M-2, a direct replacement to the previous series locomotives.
Featuring a new 710 with electronic fuel injection and reduced cylinder pressure, the SD70M-2 and AC sibling SD70ACe was now compliant to operate in the new environmental-conscious railroad industry of the early 2000s. Reducing the pressure inside the cylinder also allowed for reduced stress on the locomotive engine components, creating a staple workhorse of a locomotive for the 21st century railroading.
Customers like Norfolk Southern (who had their SD70M-2s derated) and Canadian National were primary buyers of the SD70M-2, however Class 2 railroad Florida East Coast purchased seven of these locomotives (they have since been sold to railroads like Vermont Railways, and Providence and Worchester.) However, with the popularity of AC traction, the SD70M-2 was discountinued in 2010, bringing an end to EMD offering DC traction locomotives since they started in 1922.
PT-Specific Information
| General Info | - |
|---|---|
| Prime Mover | EMD 16-710G3C-T2 (1) |
| Horsepower | 4300 (1) |
| Truck Type | EMD HTC-R |
| Axles | 6 |
| Traction Motors | 6 |
| Minimum Weight | 408,000 lbs |
| Maximum Weight | 428,000 lbs |
| Model Base Speed | 65 MPH |
| Top Speed | 74, 80, 86, and 92 MPH ⚠ |
| Electrical System | - |
|---|---|
| Generator Max Current | 9900 Amps ⚠ |
| Max Traction Motor (TM) Current | 1650 Amps ⚠ |
| Max Continuous TM Current | 1230 Amps ⚠ |
| Traction Motor Type | DC |
| Factor of Adhesion | 35% ⚠ |
| Transition Mode | Automatic, no Selector |
| Transition Groups | 1 |
| Transition Shunts | 1 |
| Generator Transition | Yes |
| Traction Control | ETC |
| Dynamic Braking (DB) Mode (if used) | Electrical Blowers |
| DB Max Current | 1000 Amps |
| DB Max Continuous Current | 945 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 | Automatic Start |
| Air Brake Schedule | 26-L |
| Compressor CFM | 254 (Gardner Denver WBO @ 900RPM) |
| Main Reservoir Volume | 35 Cubic Feet |
Notes
⚠: Not Verified or Educated Guess (1): Certain batches of SD70M-2s delivered to Norfolk Southern were rated to 4000 horsepower, and are equipped with 710G3B engines.