Builder info from B.Rumary, 25 Kingscombe, Gurney Slade, Radstock, BA3 4TH, ENGLAND and Jeremy Lambert as supplied by Allen Stanley in March 2004.
Works #2736, 2739. Rumary-Lambert credit the design with a 26" stroke, but the catalog said 24" and that's closer to contemporary information.
Fitted with crown bar, wagon top boiler with steam dome just ahead of the cab. The tender sloped, presumably because this engine would be backing up as often as going forward in its branch-line duties. When they were delivered, the railroad was known as the Buffalo & St Mary's, but it acquired the "Southwestern" very shortly thereafter.
| Specifications | |
|---|---|
| Class | |
| Locobase ID | 2611 |
| Railroad | Buffalo, St.Mary's, & SouthWestern |
| Whyte | 2-6-0 |
| Road Numbers | 5, 11 |
| Gauge | Std |
| Builder | Brooks |
| Year | 1897 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase | 13' |
| Engine Wheelbase | 20.50' |
| Ratio of driving wheelbase to overall engine wheebase | 0.63 |
| Overall Wheelbase (engine & tender) | 47.17' |
| Axle Loading (Maximum Weight per Axle) | |
| Weight on Drivers | 108000 lbs |
| Engine Weight | 124000 lbs |
| Tender Light Weight | 72000 lbs |
| Total Engine and Tender Weight | 196000 lbs |
| Tender Water Capacity | 3100 gals |
| Tender Fuel Capacity (oil/coal) | 4 tons |
| Minimum weight per yard of rail on which locomotive could run | 60 lb rail |
| Geometry Relating to Tractive Effort | |
| Driver Diameter | 57" |
| Boiler Pressure | 180 psi |
| Cylinders (dia x stroke) | 18" x 24" |
| Tractive Effort | 20872 lbs |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 5.17 |
| Heating Ability | |
| Firebox Area | 168 sq. ft |
| Grate Area | 23.30 sq. ft |
| Evaporative Heating Surface | 1623 |
| Superheating Surface | |
| Combined Heating Surface | 1623 |
| Evaporative Heating Surface/Cylinder Volume | 229.61 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 4194 |
| Same as above plus superheater percentage | 4194 |
| Same as above but substitute firebox area for grate area | 30240 |
| Power L1 | 5958.38 |
| Power MT | 364.89 |
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