M640 - MagnumMacKivler/RLCPT2 GitHub Wiki
The M640 was the 4000 horsepower offering on the M-Line's six-axle universal chassis, Alco/MLW's attempt at standardizing their different models of locomotive. At the time it was the most powerful single engine production locomotive out there, having four hundred horsepower over it's nearest competitor, the SD45; As a side effect, along with the fact it was an Alco based product, railroads were very hesitant to buy them, ending production with only one unit built for Canadian Pacific. Thankfully, due to CP's tendency to donate locomotives, the single M640 produced today exists at ExpoRail Canada.
PT-Specific Information
| General Info | - |
|---|---|
| Prime Mover | ALCO 18-251F |
| Horsepower | 4000 |
| Truck Type | Dofasco Hi-Ad (1) |
| Axles | 6 |
| Traction Motors | 6 |
| Minimum Weight | 384,000 lbs |
| Maximum Weight | 420,000 lbs |
| Model Base Speed | 70 MPH |
| Top Speed | 70, 75, 79, 84, or 93 |
| Electrical System | - |
|---|---|
| Generator Max Current | 5400 Amps |
| Max Traction Motor (TM) Current | 1800 Amps |
| Max Continuous TM Current | 1195 Amps |
| Traction Motor Type | DC |
| Factor of Adhesion | 29% |
| Transition Mode | Automatic with Selector |
| Transition Groups | 2, 1 |
| Transition Shunts | 1, 1 |
| Generator Transition | No |
| Traction Control | APR + Sand |
| Dynamic Braking (DB) Mode (if used) | Mechanical Blowers @ 50% |
| DB Max Current | 830 Amps |
| DB Max Continuous Current | 830 Amps |
| Blended Braking | No |
| Miscellaneous | - |
|---|---|
| Head-End Power (HEP) | No |
| HEP Power Consumption | N/A |
| HEP Standby/Run Mode | N/A |
| Load Ramp Speed | 10 Amps/Tick |
| TM Overload Protection | No |
| Starter Mode | Latched Primer, Manual Start |
| Air Brake Schedule | 26-L |
| Compressor CFM | 247.5 (Wabco 3CDC @ 1100 RPM) |
| Main Reservoir Volume | 35.9 Cubic Feet |
Notes
(1): A small amount of Australian M-Liners were built with Alco's three-axle Hi-Ad truck.
⚠: Not Verified or Educated Guess