The two small Moguls Baldwin built for the MRR had different tube counts: the 193 in the specifications refers to 2950; the other locomotive - 2951 -had 211 tubes.
| Specifications | |
|---|---|
| Class | M1 |
| Locobase ID | 9887 |
| Railroad | Montana RR (CMStP&P) |
| Whyte | 2-6-0 |
| Road Numbers | 102-103 |
| Gauge | Std |
| Builder | Burnham, Williams & Co |
| Year | 1905 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase | 15' |
| Engine Wheelbase | 24.50' |
| Ratio of driving wheelbase to overall engine wheebase | 0.61 |
| Overall Wheelbase (engine & tender) | 45.79' |
| Axle Loading (Maximum Weight per Axle) | |
| Weight on Drivers | 94300 lbs |
| Engine Weight | 113000 lbs |
| Tender Light Weight | 66100 lbs |
| Total Engine and Tender Weight | 179100 lbs |
| Tender Water Capacity | 3800 gals |
| Tender Fuel Capacity (oil/coal) | 10 tons |
| Minimum weight per yard of rail on which locomotive could run | 52.39 lb rail |
| Geometry Relating to Tractive Effort | |
| Driver Diameter | 63" |
| Boiler Pressure | 190 psi |
| Cylinders (dia x stroke) | 18" x 24" |
| Tractive Effort | 19934 lbs |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.73 |
| Heating Ability | |
| Firebox Area | 128 sq. ft |
| Grate Area | 24.50 sq. ft |
| Evaporative Heating Surface | 1234 |
| Superheating Surface | |
| Combined Heating Surface | 1234 |
| Evaporative Heating Surface/Cylinder Volume | 174.58 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 4655 |
| Same as above plus superheater percentage | 4655 |
| Same as above but substitute firebox area for grate area | 24320 |
| Power L1 | 5289.08 |
| Power MT | 370.96 |
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