| Specifications | |
|---|---|
| Class | F-12a |
| Locobase ID | 9476 |
| Railroad | Rutland |
| Whyte | 4-6-0 |
| Road Numbers | 40-49 |
| Gauge | Std |
| Builder | Alco |
| Year | 1902 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase | 14.83' |
| Engine Wheelbase | 25.83' |
| Ratio of driving wheelbase to overall engine wheebase | 0.57 |
| Overall Wheelbase (engine & tender) | 56.25' |
| Axle Loading (Maximum Weight per Axle) | |
| Weight on Drivers | 118000 lbs |
| Engine Weight | 155000 lbs |
| Tender Light Weight | |
| Total Engine and Tender Weight | 0 |
| Tender Water Capacity | 5900 gals |
| Tender Fuel Capacity (oil/coal) | 10 tons |
| Minimum weight per yard of rail on which locomotive could run | 65.56 lb rail |
| Geometry Relating to Tractive Effort | |
| Driver Diameter | 69" |
| Boiler Pressure | 200 psi |
| Cylinders (dia x stroke) | 20" x 26" |
| Tractive Effort | 25623 lbs |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.61 |
| Heating Ability | |
| Firebox Area | 178.85 sq. ft |
| Grate Area | 30 sq. ft |
| Evaporative Heating Surface | 2446 |
| Superheating Surface | |
| Combined Heating Surface | 2446 |
| Evaporative Heating Surface/Cylinder Volume | 258.73 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 6000 |
| Same as above plus superheater percentage | 6000 |
| Same as above but substitute firebox area for grate area | 35770 |
| Power L1 | 8126.38 |
| Power MT | 455.48 |
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