Unlike most of the other classes on the West Point Route, these Mountains went to only one of the two constituents; the Atlanta & West Point did not buy 4-8-2s. They were relatively light and small, but did the job. In World War II, they were sent to the Georgia Railroad (which connected Augusta with Atlanta and was a part of the WPR as well).
| Specifications | |
|---|---|
| Class | M |
| Locobase ID | 7317 |
| Railroad | Western Railway of Alabama (WPR) |
| Whyte | 4-8-2 |
| Road Numbers | 180-181 |
| Gauge | Std |
| Builder | Alco-Richmond |
| Year | 1920 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase | 18' |
| Engine Wheelbase | 38.92' |
| Ratio of driving wheelbase to overall engine wheebase | 0.46 |
| Overall Wheelbase (engine & tender) | 73.94' |
| Axle Loading (Maximum Weight per Axle) | 52500 lbs |
| Weight on Drivers | 209500 lbs |
| Engine Weight | 316000 lbs |
| Tender Light Weight | 198700 lbs |
| Total Engine and Tender Weight | 514700 lbs |
| Tender Water Capacity | 11000 gals |
| Tender Fuel Capacity (oil/coal) | 15 tons |
| Minimum weight per yard of rail on which locomotive could run | 87.29 lb rail |
| Geometry Relating to Tractive Effort | |
| Driver Diameter | 63" |
| Boiler Pressure | 190 psi |
| Cylinders (dia x stroke) | 27" x 28" |
| Tractive Effort | 52326 lbs |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.00 |
| Heating Ability | |
| Firebox Area | 280 sq. ft |
| Grate Area | 66.70 sq. ft |
| Evaporative Heating Surface | 3662 |
| Superheating Surface | 817 |
| Combined Heating Surface | 4479 |
| Evaporative Heating Surface/Cylinder Volume | 197.36 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 12673 |
| Same as above plus superheater percentage | 14984.64 |
| Same as above but substitute firebox area for grate area | 62904.04 |
| Power L1 | 13348.36 |
| Power MT | 561.87 |
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