GP18 - MagnumMacKivler/RLCPT2 GitHub Wiki
Aberdeen and Rockfish's sole GP18 sits at the EMD factory in McCook, Illinois in August, 1963. EMD photo, Aberdeen and Rockfish Collection
The EMD GP18 was an improved version of the GP9, utilizing a 16 cylinder 567D1 engine rated at 1800 horsepower. The GP18 was released concurrently to the GP20, establishing the concept of cataloging a turbocharged and roots-blown version of essentially the same locomotive, a practice which EMD continued for over 10 years.
Production ran from December of 1959 to November of 1963, with 405 units produced. An oddball group among this number was 100 of Missouri Pacific's units, which rode on AAR Type B trucks from traded-in ALCO FA-1, and FA-2 locomotives.
An MP GP18 with AAR Type B trucks, unknown photographer
PT-Specific Information
| General Info | - |
|---|---|
| Prime Mover | EMD 16-567D1 |
| Horsepower | 1800 |
| Truck Type | EMD "Blomberg" B (1) |
| Axles | 4 |
| Traction Motors | 4 |
| Minimum Weight | 240,000 lbs |
| Maximum Weight | 260,000 lbs ⚠ |
| Model Base Speed | 55 MPH (1) |
| Top Speed | 55, 65, 71, 77, 83, or 89 (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 | 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 | 26-L (2) |
| Compressor CFM | 235 (Gardner Denver WBO @ 835 RPM) |
| Main Reservoir Volume | 35.6 Cubic Feet (3) |
Notes:
⚠: Not Verified or Educated Guess
(1): Some GP18s rode on trade in trucks; the following numbers would reflect the donor locomotive: Top Speed, Model Base Speed, Generator Max Current, Max TM Current, Max Continuous TM Current.
(2): 6-BL or 24-RL optional.
(3): If built with GP7/9 style air tanks mounted cross-wise behind the fuel tank, the Main Reservoir Volume would be 42.9 cubic feet.