RS 11
Delaware and Hudson RS-11 5005 sits an an unknown fuel and sand track infront of another D&H ALCo. Photo credit Robert Sheridan under the Greg Sommers collection.
The RS-11 is a 4 axle, V12 turbocharged locomotive that was a replacement for the tried and true Alco RS-3.
ALCo, working off the sucess of their RS-3, later developed a higher horsepower turbocharged engine to compete with the highly popular EMD GP9 engine; this engine, the Alco 251, resolved a lot of issues that came from the previous ALCo 244. While on paper this engine was a higher horsepower engine that accelerated faster that used less fuel than a GP9, ultimately railroads decided to continue purchasing EMD products on a much greater scale.
Additionally, a Canadian version (manufactured by ALCo subsidiary Montreal Locomotive Works) was offered, and was branded as the RS-18.
In total, production for the RS-11s ran from February 1956 to June 1961, with a grand total of 462 made by ALCo and occasional chip in from MLW. Noteable orders were 3 demonstrators from ALCo to show around on various different railroads (701, 701A, 701B), 2 RS-11s made off of RS-3 rebuilds with CNW that kept their RS-3 short hood, and an order of 75 units from Ferrocarilles Nacionales de Mexico (Mexican National Railways), as well as orders from Southern Peru Copper company.
| General Info | - |
|---|---|
| Prime Mover | ALCO |
| Horsepower | 1800 |
| Truck Type | AAR Type B |
| Axles | 4 |
| Traction Motors | 4 |
| Minimum Weight | 240000 lbs |
| Maximum Weight | 260000 lbs |
| Model Base Speed | 65 MPH |
| Top Speed | 65, 75, 80, 92 MPH |
| Electrical System | - |
|---|---|
| Generator Max Current | 5400 Amps |
| Max Traction Motor (TM) Current | 1800 Amps |
| Max Continuous TM Current | 1085 Amps |
| Traction Motor Type | DC |
| Factor of Adhesion | 25% |
| Transition Mode | Automatic with Selector |
| Transition Groups | 2, 2, 1, 1 |
| Transition Shunts | 1, 0.75, 1, 0.75 |
| Generator Transition | No |
| Traction Control | APR |
| Dynamic Braking (DB) Mode (if used) | Mechanical Blowers @ 50% |
| DB Max Current | 1800 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 | 6SL or 24RL |
| Compressor CFM | 306 (Wabco 3CDB @ 1000 RPM) |
| Main Reservoir Volume | 35.2 Cubic Feet |
⚠: Not Verified or Educated Guess