GP9 - MagnumMacKivler/RLCPT2 GitHub Wiki
Central Vermont Railway GP9 4555 flying white metal flags at Valparaiso, Indiana on October 22, 1966, Chuck Zeiler photo
The GP9 was EMD's second model in the iconic "General Purpose" series, succeeding the GP7 in 1954. Like its Carbody Unit and 6-motor counterparts, the GP9's improved 567C prime mover developed an additional 250 Horsepower over the GP7. The GP9 performed exceptionally well in the North American market, selling over 4,000 units to a myriad of railroads. The GP9 was succeeded by the GP18 and GP20 in 1959.
PT-Specific Information
| General Info | - |
|---|---|
| Prime Mover | EMD 16-567C |
| Horsepower | 1750 |
| Truck Type | EMD "Blomberg" B (1) |
| Axles | 4 |
| Traction Motors | 4 |
| Minimum Weight | 238,000 lbs |
| Maximum Weight | 260,000 lbs ⚠ |
| Model Base Speed | 65 MPH |
| Top Speed | 55, 65, 71, 77, 83, or 89 |
| 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 | Automatic with Selector |
| Transition Groups | 2, 2, 1, 1 |
| Transition Shunts | 1, 0.75, 1, 0.75 |
| Generator Transition | No |
| Traction Control | APR |
| Dynamic Braking (DB) Mode (if used) | Mechanical Blowers @ 37.5% |
| DB Max Current | 700 Amps |
| DB Max Continuous Current | 700 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 | 24-RL (2) |
| Compressor CFM | 235 (Gardner Denver WBO @ 835 RPM) |
| Main Reservoir Volume | 42.9 Cubic Feet (3) |
Notes:
⚠: Not Verified or Educated Guess
(1): GP7s were also built on AAR Type As and EMD Fexicoil B trucks.
(2): Units could also come with 6-BL (US) or 6SL (CAN) brake schedules.
(3): If built with "torpedo tubes" the Main Res Volume would be 35.6 cubic feet.