GT22MC - MagnumMacKivler/RLCPT2 GitHub Wiki
KiwiRail DFT (EMD GT22MC) #7008 at Whakatu, Hawkes Bay, October 4, 2018. Photo by Titus Studios.
The GT22MC were built by General Motors Diesel of Canada between 1979 and 1981. Between 1992 and 1997, all the locomotives were rebuilt as the DFT class, a turbocharged version of the DF. The main downside to the DF was the lack of power output from the diesel engine. This hindered the DF when it came to hauling heavy freight trains. While the locomotives had a comparable tractive effort to the DX class, they had little more than half the power of a DX.
In 1992, DF 6260 was rebuilt with a new turbocharged diesel engine and some other minor alterations. The rebuilt DF was reclassified DFT (the T standing for turbocharged) and renumbered 7008. After 18 months of trial, the decision was made to convert the remaining 29 DFs to DFTs, with the last unit converted in February 1997. The turbocharged locomotives can now generate 2,400 hp, and now comfortably fit between the DC class and the DX class in terms of power output.
In December 1996, Tranz Rail sold the DFT class to the General American Transportation Corporation (GATX, an American locomotive and rolling stock leasing company) for $131.5 million. It then leased the locomotives back for a period of 12 years. The lease ended on 19 December 2008 with ownership of the locomotives going to Tranz Rail's successor, KiwiRail, which paid a further $36.6m to buy the locomotives back.
PT-Specific Information
| General Info | - |
|---|---|
| Prime Mover | EMD 12-645E3C |
| Horsepower | 2400 HP |
| Truck Type | Flexicoil A1A |
| Axles | 6 |
| Traction Motors | 6 |
| Minimum Weight | 192640 lbs |
| Maximum Weight | 212800 lbs |
| Model Base Speed | 70 MPH |
| Top Speed | 70 |
| Electrical System | - |
|---|---|
| Generator Max Current | 3000 Amps |
| Max Traction Motor (TM) Current | 600 |
| Max Continuous TM Current | 475 |
| Traction Motor Type | DC |
| Factor of Adhesion | 25% |
| Transition Mode | Fully Automatic |
| Transition Groups | 2,2,1,1 |
| Transition Shunts | 1, 0.75, 1, 0.75 |
| Generator Transition | No |
| Traction Control | APR with sanding |
| Dynamic Braking (DB) Mode (if used) | Mechanical Blowers |
| DB Max Current | 400 |
| DB Max Continuous Current | 450 |
| 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 | 30.5 Cubic Feet ⚠ |
⚠: Not Verified or Educated Guess