A H Stange Lumber Company 2-6-2 "Prairie" Locomotives in the USA
Class Details by Steve Llanso of Sweat House Media
Class 2 (Locobase 11726)
Data from Negative 8440, Southern Methodist University, Central University Libraries, DeGolyer Library collection of digitized Baldwin images, retrieved 26 October 2010 from [
] . See also DeGolyer, Vol 71, pp. 398+. Works number was 55573 in July 1922.
The negative shows an unusual arrangement of the outside radial Walschaert valve gear. To allow for the proper length of combination rod, the link was mounted over the middle driver.
Although lettered for AH Stange of Merrill, Wisc, this Prairie logger was operated by William Boniface Lumber over 60 lb/yard (30 kg/metre) rail up 3% grades and around 25 degree curves. It seems to have run in Saint Bernard Mining service later and after that, the Mosinee Paper Mills.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 2 |
| Locobase ID | 11726 |
| Railroad | A H Stange Lumber Company |
| Country | USA |
| Whyte | 2-6-2 |
| Number in Class | 1 |
| Road Numbers | 2 |
| Gauge | Std |
| Number Built | 1 |
| Builder | Baldwin |
| Year | 1922 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 9 / 2.74 |
| Engine Wheelbase (ft / m) | 24.50 / 7.47 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.37 |
| Overall Wheelbase (engine & tender) (ft / m) | 48.33 / 14.73 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 84,570 / 38,360 |
| Engine Weight (lbs / kg) | 106,620 / 48,362 |
| Tender Loaded Weight (lbs / kg) | 71,680 / 32,514 |
| Total Engine and Tender Weight (lbs / kg) | 178,300 / 80,876 |
| Tender Water Capacity (gals / ML) | 3500 / 13.26 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 5 / 5 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 47 / 23.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 46 / 1168 |
| Boiler Pressure (psi / kPa) | 180 / 1240 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 16" x 24" / 406x610 |
| Tractive Effort (lbs / kg) | 20,435 / 9269.17 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.14 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 218 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 12.75 / 3.89 |
| Firebox Area (sq ft / m2) | 83 / 7.71 |
| Grate Area (sq ft / m2) | 16.20 / 1.51 |
| Evaporative Heating Surface (sq ft / m2) | 1529 / 142.10 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1529 / 142.10 |
| Evaporative Heating Surface/Cylinder Volume | 273.52 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2916 |
| Same as above plus superheater percentage | 2916 |
| Same as above but substitute firebox area for grate area | 14,940 |
| Power L1 | 4799 |
| Power MT | 375.31 |