Snoqualmie Falls Lumber Company 2-6-2 "Prairie" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 6 (Locobase 15238)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Vol 71, pp. 393+. Works numbers were 56323 in March 1923.

Somewhat larger than usual oil-burning Prairie saddle-tank logging engine that served the SFLC and successor Weyerhaeuser Timber until it was sold in 1948 to Canadian Forest Products as their #112. It remained in service into the 1960s before being put on display at Beaver Cove, British Columbia.

Specifications by Steve Llanso of Sweat House Media
Locobase ID15238
RailroadSnoqualmie Falls Lumber Company
Number in Class2
Road Numbers6
Number Built2
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase9'
Engine Wheelbase24.42'
Ratio of driving wheelbase to overall engine wheebase 0.37
Overall Wheelbase (engine & tender)24.42'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers115000 lbs
Engine Weight153000 lbs
Tender Light Weight
Total Engine and Tender Weight153000 lbs
Tender Water Capacity2000 gals
Tender Fuel Capacity (oil/coal)900 gals
Minimum weight of rail (calculated)64 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter44"
Boiler Pressure175 psi
Cylinders (dia x stroke)18" x 24"
Tractive Effort26288 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.37
Heating Ability
Firebox Area109 sq. ft
Grate Area22 sq. ft
Evaporative Heating Surface1103 sq. ft
Superheating Surface228 sq. ft
Combined Heating Surface1331 sq. ft
Evaporative Heating Surface/Cylinder Volume156.04
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation3850
Same as above plus superheater percentage4505
Same as above but substitute firebox area for grate area22318
Power L16718
Power MT386.36

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