A H Stange Lumber Company 2-6-2 "Prairie" Locomotives of 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 http://digitalcollections.smu.edu/cdm4/item_viewer.php . 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.

Specifications by Steve Llanso of Sweat House Media
Locobase ID11726
RailroadA H Stange Lumber Company
Number in Class1
Road Numbers2
Number Built1
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase9'
Engine Wheelbase24.50'
Ratio of driving wheelbase to overall engine wheebase 0.37
Overall Wheelbase (engine & tender)48.33'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers84570 lbs
Engine Weight106620 lbs
Tender Light Weight71680 lbs
Total Engine and Tender Weight178300 lbs
Tender Water Capacity3500 gals
Tender Fuel Capacity (oil/coal)5 tons
Minimum weight of rail (calculated)47 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter46"
Boiler Pressure180 psi
Cylinders (dia x stroke)16" x 24"
Tractive Effort20435 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.14
Heating Ability
Firebox Area83 sq. ft
Grate Area16.20 sq. ft
Evaporative Heating Surface1529 sq. ft
Superheating Surface
Combined Heating Surface1529 sq. ft
Evaporative Heating Surface/Cylinder Volume273.77
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2916
Same as above plus superheater percentage2916
Same as above but substitute firebox area for grate area14940
Power L14803
Power MT375.62

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