C424 - MagnumMacKivler/RLCPT2 GitHub Wiki
Image Copyright flickr user Chuck Zeiler
The C424 was introduced in 1963 along with the C420 and the C624 as part of ALCO's "Century" series. A direct replacement for the RS-27, the C424 sported an all-new carbody design much like it's stablemates. Due to the complexity of their electrical systems, few remain in their as-built configurations, with many having been rewired or rebuilt to C420 specification.
PT-Specific Information
| General Info | - |
|---|---|
| Prime Mover | ALCO 16-251B |
| Horsepower | 2400 |
| Truck Type | AAR Type B (1) |
| Axles | 4 |
| Traction Motors | 4 |
| Minimum Weight | 256,000 lbs |
| Maximum Weight | 272,000 lbs |
| Model Base Speed | 70 MPH (2) |
| Top Speed | 70, 80, or 86 MPH (2) |
| Electrical System | - |
|---|---|
| Generator Max Current | 3600 Amps |
| Max Traction Motor (TM) Current | 1800 Amps |
| Max Continuous TM Current | 1085 Amps (3) |
| Traction Motor Type | DC |
| Factor of Adhesion | 25% (1) |
| Transition Mode | Automatic with Selector |
| Transition Groups | 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1 |
| Transition Shunts | 1, 0.95, 0.91, 0.87, 0.83, 0.79, 0.75, 0.71, 0.67, 0.63, 0.59, 0.55, 0.51, 0.47, 0.43, 0.39, 1, 0.87, 0.79, 0.71, 0.63, 0.55, 0.47, 0.39 ⚠ |
| Generator Transition | No |
| Traction Control | APR |
| Dynamic Braking (DB) Mode (if used) | Mechanical Blowers @ 50% |
| DB Max Current | 830 Amps |
| DB Max Continuous Current | 830 Amps |
| Blended Braking | No |
| Miscellaneous | - |
|---|---|
| Head-End Power (HEP) | No |
| HEP Power Consumption | N/A |
| HEP Standby/Run Mode | N/A |
| Load Ramp Speed | 10 Amps/Tick |
| TM Overload Protection | No |
| Starter Mode | Latched Primer, Manual Start |
| Air Brake Schedule | 26-L |
| Compressor CFM | 230.625 (Wabco 3CDC @ 1025 RPM) |
| Main Reservoir Volume | 35.2 Cubic Feet |
Notes
⚠: Not Verified or Educated Guess
(1): Late production C424s could be bought with Alco's two-axle Hi-Ad trucks, boosting the adhesion to 29%.
(2): Later in production the gearing options changed, making the base speed 67 MPH and the max speeds 67, 75, 79, or 84 MPH
(3): Later Alcos had newer GE 752 traction motors, changing this rating to 1195 Amps.