Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 62, p. 395. Works number was 53146 in April 1920.
A small Mikado tank traveled over this peninsular logging railway on 40-45 lb/yard (20-22.5 kg/metre) rail up 4 and 5% grades, and curves "not over" 25 degrees (radii of 231 feet/70.4 metres).
The 2 would later work on the Weyerhaeuser Timber Company.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 2 |
| Locobase ID | 14716 |
| Railroad | Simpson Logging |
| Country | USA |
| Whyte | 2-8-2ST |
| Number in Class | 1 |
| Road Numbers | 2 |
| Gauge | Std |
| Number Built | 1 |
| Builder | Baldwin |
| Year | 1920 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 11.50 / 3.51 |
| Engine Wheelbase (ft / m) | 25.75 / 7.85 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.45 |
| Overall Wheelbase (engine & tender) (ft / m) | 5 / 1.52 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 95,500 / 43,318 |
| Engine Weight (lbs / kg) | 124,500 / 56,472 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 1700 / 6.44 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 650 / 2460 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 40 / 20 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 41 / 1041 |
| Boiler Pressure (psi / kPa) | 180 / 1240 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 16" x 22" / 406x559 |
| Tractive Effort (lbs / kg) | 21,017 / 9533.16 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.54 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 139 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 13 / 3.96 |
| Firebox Area (sq ft / m2) | 78 / 7.25 |
| Grate Area (sq ft / m2) | 17.70 / 1.64 |
| Evaporative Heating Surface (sq ft / m2) | 1018 / 94.61 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1018 / 94.61 |
| Evaporative Heating Surface/Cylinder Volume | 198.83 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 3186 |
| Same as above plus superheater percentage | 3186 |
| Same as above but substitute firebox area for grate area | 14,040 |
| Power L1 | 3383 |
| Power MT | 312.39 |