St Croix Timber Company 2-6-2 "Prairie" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 1 (Locobase 13955)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 43, p. 269 . Works number was 39005 in January 1913.

St Croix Timber of New Richmond, Wisc was located in Douglas County in the extreme northwestern part of the Badger State as part of the Empire Lumber Company's ....empire. As with most logging Prairie engines, the 1 had several owners. In this case, all of the owners were in Wisconsin. In 1915, she was passed on to Mellen Lumber of Mellen, Wisc as their #5. In 1928, Mellen sold the 5 to Roddis Lumber & Veneer of Marshfield, which upgraded the 5's road number to 7.

RL &V operated the engine for about a decade, then sold it to locomotive rebuilder/reseller Southern Iron & Equipment in 1938. Apparently, the engine lay dormant for almost a decade before going to work for Dells Paper & Pulp of Eau Claire, Wisconsin.

Principal Dimensions by Steve Llanso of Middle Run Media

Locobase ID13955
RailroadSt Croix Timber Company
Number in Class1
Road Numbers1
Number Built1
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 9.17 / 2.80
Engine Wheelbase (ft / m)24.67 / 7.52
Ratio of driving wheelbase to overall engine wheelbase 0.37
Overall Wheelbase (engine & tender) (ft / m)46.73 / 14.69
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)82,500 / 37,195
Engine Weight (lbs / kg)110,500 / 49,895
Tender Loaded Weight (lbs / kg)50,500 / 27,216
Total Engine and Tender Weight (lbs / kg)161,000 / 77,111
Tender Water Capacity (gals / ML)2500 / 11.36
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) / 6
Minimum weight of rail (calculated) (lb/yd / kg/m)46 / 23
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)44 / 1168
Boiler Pressure (psi / kPa)160 / 13.80
High Pressure Cylinders (dia x stroke) (in / mm)16" x 24" / 406x610
Tractive Effort (lbs / kg)18,991 / 8614.18
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.34
Heating Ability
Tubes (number - dia) (in / mm)240 - 2" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)11.87 / 3.62
Firebox Area (sq ft / m2)118 / 10.41
Grate Area (sq ft / m2)16 / 1.49
Evaporative Heating Surface (sq ft / m2)1600 / 148.09
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1600 / 148.09
Evaporative Heating Surface/Cylinder Volume286.23
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2560
Same as above plus superheater percentage2560
Same as above but substitute firebox area for grate area18,880
Power L14597
Power MT368.53

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Wes Barris