| Specifications | |
|---|---|
| Class | 571 |
| Locobase ID | 61 |
| Railroad | Richmond, Fredericksburg & Potomac |
| Whyte | 2-8-4 |
| Road Numbers | 571-580 |
| Gauge | Std |
| Builder | Lima |
| Year | 1942 |
| Valve Gear | |
| Locomotive Length and Weight | |
| Driver Wheelbase | 18.20' |
| Engine Wheelbase | 42' |
| Ratio of driving wheelbase to overall engine wheebase | 0.43 |
| Overall Wheelbase (engine & tender) | 94.06' |
| Axle Loading (Maximum Weight per Axle) | |
| Weight on Drivers | 270900 lbs |
| Engine Weight | 433200 lbs |
| Tender Light Weight | 303400 lbs |
| Total Engine and Tender Weight | 736600 lbs |
| Tender Water Capacity | 22000 gals |
| Tender Fuel Capacity (oil/coal) | 25 tons |
| Minimum weight per yard of rail on which locomotive could run | 112.88 lb rail |
| Geometry Relating to Tractive Effort | |
| Driver Diameter | 69" |
| Boiler Pressure | 245 psi |
| Cylinders (dia x stroke) | 25" x 34" |
| Tractive Effort | 64135 lbs |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.22 |
| Heating Ability | |
| Firebox Area | 461 sq. ft |
| Grate Area | 90.30 sq. ft |
| Evaporative Heating Surface | 4772 |
| Superheating Surface | 1932 |
| Combined Heating Surface | 6704 |
| Evaporative Heating Surface/Cylinder Volume | 247.04 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 22123.50 |
| Same as above plus superheater percentage | 28499.19 |
| Same as above but substitute firebox area for grate area | 145494.19 |
| Power L1 | 35684.04 |
| Power MT | 1161.61 |
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