Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 48, p. 243. See also L I Walrath, "Mineral, Washington" in The Coast, Volume 17 (May 1909), pp. 361-362. Works numbers were 39395 in March 1913.
MLLC bought this standard logging Mikado. A 1922 photo shows that the engine was later fitted with a large spark-arresting screened cylinder.
The company's railroad operated in Washington State's Upper Nisqually Valley. After John Donahue built a sawmill in Mineral in 1906, he built a railroad to export the logs he was cutting. Mineral also fast became known as "an ideal spot for a summer resort and is fast becoming noted as one.", according to L I Walrath in 1909. "The altitude is about 1,500, which with surrounding hills and canyons make it very attractive to the tourist. Nestling as it does in the foothills of the Cascade mountains, it certainly rivals many of the beauty spots in foreign lands, to which the ever restless American travels for change and recreation."
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 103 |
| Locobase ID | 14143 |
| Railroad | Mineral Lake Logging Company |
| Country | USA |
| Whyte | 2-8-2 |
| Number in Class | 1 |
| Road Numbers | 103 |
| Gauge | Std |
| Number Built | 1 |
| Builder | Baldwin |
| Year | 1912 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 12.08 / 3.68 |
| Engine Wheelbase (ft / m) | 27.25 / 8.31 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.44 |
| Overall Wheelbase (engine & tender) (ft / m) | 50.46 / 15.38 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 113,500 / 51,483 |
| Engine Weight (lbs / kg) | 141,100 / 64,002 |
| Tender Loaded Weight (lbs / kg) | 84,000 / 38,102 |
| Total Engine and Tender Weight (lbs / kg) | 225,100 / 102,104 |
| Tender Water Capacity (gals / ML) | 3500 / 13.26 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 7 / 6 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 47 / 23.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 44 / 1118 |
| Boiler Pressure (psi / kPa) | 185 / 1280 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 18" x 24" / 457x610 |
| Tractive Effort (lbs / kg) | 27,790 / 12605.35 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.08 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 291 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 13 / 3.96 |
| Firebox Area (sq ft / m2) | 140 / 13.01 |
| Grate Area (sq ft / m2) | 25.50 / 2.37 |
| Evaporative Heating Surface (sq ft / m2) | 2108 / 195.84 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 2108 / 195.84 |
| Evaporative Heating Surface/Cylinder Volume | 298.16 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 4718 |
| Same as above plus superheater percentage | 4718 |
| Same as above but substitute firebox area for grate area | 25,900 |
| Power L1 | 5388 |
| Power MT | 418.63 |