SD90MAC - MagnumMacKivler/RLCPT2 GitHub Wiki
Plz insert SD90MAC photo thank you keep the change
The SD90MAC was EMD's solution to the horsepower race of the 1990s. With pressure to create a high output locomotive from the Morrison Knudsen group's MK5000C and General Electric's AC6000CW, EMD eventually released their own 6000 horsepower competitor. The SD90MAC was then crowned the largest horsepower, single-engine locomotive produced by EMD (not to be compared to the double-engined DD35,DD35A, and DDA40X).However, early SD90MACs were notorious for a host of problems from their 265H engines, and most were released with a standard issue 4,300 EMD 710 engine (This type was known as the SD9043MAC) for later conversion.
The SD90MAC II was an improvement upon the H series, and featured a newly styled carbody with more angular geometry. The 265H engine was improved, but was not enough however for a long 6000 HP single-engined locomotive with a large train to afford. (Two 6000 HP locomotives on a train will loose half of their horsepower if a single engine goes out, compared to three 4000 HP locomotives only losing a third.) Thus, only Union Pacific and Canadian Pacific bought true 265H equipped locomotives, and most were retired within 15 years of their build dates. Out of both the I and II, only 400 units were produced.
A Canadian Pacific SD90MAC II sits at Port Coquitlam, B.C. This unit was built in 1999 and would be retired a mere 9 years later; it was then cut up in 2010. Photo credit to Mark Forseille and www.cprdieselroster.com
PT-Specific Information
| General Info | - |
|---|---|
| Prime Mover | EMD GM16V265H |
| Horsepower | 6000 |
| Truck Type | EMD HTC-R II |
| Axles | 6 |
| Traction Motors | 6 |
| Minimum Weight | 420,000 lbs ⚠(1) |
| Maximum Weight | 435,000 lbs |
| Model Base Speed | 75 MPH |
| Top Speed | 75 or 80 MPH |
| Electrical System | - |
|---|---|
| Generator Max Current | 4530 Amps (2) |
| Max Traction Motor (TM) Current | 755 Amps (2) |
| Max Continuous TM Current | 755 Amps (2) |
| Traction Motor Type | AC |
| Factor of Adhesion | 35% |
| Transition Mode | Automatic, no Selector |
| Transition Groups | 1 |
| Transition Shunts | 1 |
| Generator Transition | No |
| Traction Control | ETC |
| Dynamic Braking (DB) Mode (if used) | Electrical Blowers |
| DB Max Current | 755 Amps ⚠ |
| DB Max Continuous Current | 755 Amps ⚠ |
| Blended Braking | No |
| Miscellaneous | - |
|---|---|
| Head-End Power (HEP) | No |
| HEP Power Consumption | N/A |
| HEP Standby/Run Mode | N/A |
| Load Ramp Speed | 1 Amps/Tick |
| TM Overload Protection | N/A |
| Starter Mode | Fully Automatic Start |
| Air Brake Schedule | 26L |
| Compressor CFM | 295 (Gardner Denver WBO @ 1000 RPM) |
| Main Reservoir Volume | 33.8 Cubic Feet ⚠ |
###Notes:
⚠: Not verified or educated guess
(1) SD90MAC IIs weighed 425,000. The minimum weight is an assumption because of so few purchasing railroads.
(2) AC electrical gear is three-phase. Value shown here is for a single phase; the value used by RLC PT2 should be 3 times the value shown.