GP40 - MagnumMacKivler/RLCPT2 GitHub Wiki
A CB&Q GP40 in the pre-merger BN prototype scheme. Photo by Chuck Zeiler.
The GP40 was EMD's first offering of the new turbocharged, 3000 HP 645 series V16 engine within their successful 4 axle General Purpose lineup. Like previous GP offerings, the GP40 excelled in virtually any and all uses, though most railroads preferred them as brawny-yet-affordable road freight engines, often purchasing them in far larger numbers than their SD counterpart. Between November of 1965 and December of 1971, 1,221 GP40s were produced. The GP40 replaced the prior GP35 and was replaced by the ubiquitous GP40-2 in 1972.
As with much of the 645 line, EMD offered the GP40 with a steam generator for passenger car heating, designated the GP40P. Like many passenger variants of locomotives marketed during the 1960s, though, few were built - only 13 for the CNJ. Most railroads were reluctant to invest in new passenger equipment by this time - the normal GP40 outsold the GP40P by a ratio of 600:6.
A CNJ GP40P running long hood forward, displaying it's steam generator compartment. "gg1tim" Photo.
PT-Specific Information
| General Info | - |
|---|---|
| Prime Mover | 16-645E3 |
| Horsepower | 3000 HP |
| Truck Type | EMD "Blomberg" B |
| Axles | 4 |
| Traction Motors | 4 |
| Minimum Weight | 244,800 lbs |
| Maximum Weight | 278,000 lbs |
| Model Base Speed | 65 MPH |
| Top Speed | 65, 71, 77, 83, 90, 96 MPH |
| Electrical System | - |
|---|---|
| Generator Max Current | 6000 |
| Max Traction Motor (TM) Current | 1500 |
| Max Continuous TM Current | 1050 |
| Traction Motor Type | DC |
| Factor of Adhesion | 25% |
| Transition Mode | Automatic |
| Transition Groups | 1, 1, 1, 1 (A) |
| Transition Shunts | 1, 0.67, 0.53, 0.40 (A) |
| Generator Transition | No |
| Traction Control | APR with sanding |
| Dynamic Braking (DB) Mode (if used) | Mechanical Blowers |
| DB Max Current | 700 |
| DB Max Continuous Current | 700 |
| 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 | 26L |
| Compressor CFM | 254 (WBO @ 900 RPM) |
| Main Reservoir Volume | 33.8 Cubic Feet |
Notes:
(A): Later-built GP40s had a simplified transition setup: Groups 1 / Shunts 1