DASH 9 40C - MagnumMacKivler/RLCPT2 GitHub Wiki
An NS C40-9 leads a Roadrailer train through Mableton, GA on May 21st, 2014; it has since been converted to a widecab AC rebuild. Photo credit Eugene Hale
The DASH 9-40C (C40-9) and its widecab variant, the DASH 9-40CW (C40-9W), is a 4000 horsepower mainline freight locomotive built by GE Transportation. It's a derated version of the DASH 9-44CW (C44-9W) with an optional standard cab or comfort cab. All models were purchased by Norfolk Southern and totaled 125 standard cab builds and 1,090 widecab builds.
The C40-9W is visually identical to the C44-9W; the only differences lie within the computer controls for output.
Norfolk Southern believed at the time of purchase that a derated locomotive would be more reliable and fuel efficient; NS has since changed their philosophy, and have changed the computer controls on all wide cabs to output 4400 horsepower, citing no significant difference from a normal Dash 9. Standard cabs C40-9s have since been rebuilt between 2016-2018 into AC traction wide cabs with improved emissions compliance.
PT-Specific Information
| General Info | - |
|---|---|
| Prime Mover | GE-7FDL16 |
| Horsepower | 4000 (1) |
| Truck Type | GE High Adhesion (2) |
| Axles | 6 |
| Traction Motors | 6 |
| Minimum Weight | 400,139 lbs |
| Maximum Weight | 436,349 lbs |
| Model Base Speed | 75 MPH |
| Top Speed | 75 MPH |
| Electrical System | - |
|---|---|
| Generator Max Current | 6676.3 Amps ⚠ |
| Max Traction Motor (TM) Current | 1776 Amps (3) |
| Max Continuous TM Current | 1370 Amps (3) |
| Traction Motor Type | DC |
| Factor of Adhesion | 36.0% ⚠ |
| Transition Mode | Automatic, no selector |
| Transition Groups | 1 |
| Transition Shunts | 1 |
| Generator Transition | Yes |
| Traction Control | Electronic Traction Control |
| Dynamic Braking (DB) Mode (if used) | Electrical Blowers |
| DB Max Current | 920 Amps (3) |
| DB Max Continuous Current | 910 Amps (3) |
| Blended Braking | No |
| Miscellaneous | - |
|---|---|
| Head-End Power (HEP) | No |
| HEP Power Consumption | N/A |
| HEP Standby/Run Mode | N/A |
| Load Ramp Speed | 3 Amps/Tick ⚠ |
| TM Overload Protection | Yes |
| Starter Mode | Manual Primer, Manual Start (4) |
| Air Brake Schedule | 26-L |
| Compressor CFM | 236 (Wabco 3CDC @ 1050 RPM) |
| Main Reservoir Volume | 35 Cu.Ft ⚠ |
Notes
⚠: Not Verified or Educated Guess
(1) Horsepower output is electronically controlled and can be increased to 4400 when needed. Listed horsepower for traction is 3990, earlier it was listed at 3965. Gross HP is 4100.
(2) Could also be ordered with a Self-Steering truck, which would supposedly reduce wear on the wheels.
(3) Ratings from an ES44DC. They both share 752AH traction motors. Despite what sources say, the B13B is not a DC motor and as such was not used on the C40-9s. The B13 series are AC traction motors.
(4) All locomotives also feature an automatic starter inside the cab.