Flambeau Paper Company 2-6-2 "Prairie" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 2 (Locobase 13829)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 39, p. 74 . Works number was 37661 in April 1912.

FLC's scene of operations near Park Falls, Wisconsin (about 60 miles south of the Lake Superior shoreline) imposed some stiff demands on a small saddle tank. Rolling on 65-lb/yard (32.5-kg/metre) rail, the 2 would face 6% grades and 30-degree curves. And, said the specs, "All parts to be as well above the track as the design will permit ...Track is rough, make all parts, particularly bumper, strong." Performance guarantees reflected the arduous service. The locomotive was to be able to haul 76 tons up the straight 6% grade, 126 tons up a straight 4%, and 230 tons up a line that had both a 1 1/2% grade and 26-degree curves.

The 2 served FLC for 35 years before being scrapped in 1947. Flambeau Paper remained in business until it declared bankruptcy and closed in 2006. Investor Butch Johnson bought the plant and reopened it, seeking profitability by converting to non-fossil-fuel and environmentally friendly operation.

Principal Dimensions by Steve Llanso of Sweat House Media
Locobase ID13,829
RailroadFlambeau Paper Company
Number in Class1
Road Numbers2
Number Built1
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)10 / 3.05
Engine Wheelbase (ft / m)25.75 / 7.85
Ratio of driving wheelbase to overall engine wheebase 0.39
Overall Wheelbase (engine & tender) (ft / m)25.75 / 7.85
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)88,000 / 39,916
Engine Weight (lbs / kg)114,000 / 51,710
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)114,000
Tender Water Capacity (gals / ML)1800 / 6.82
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)3 / 2.70
Minimum weight of rail (calculated) (lb/yd / kg/m)49 / 24.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)44 / 1118
Boiler Pressure (psi / kPa)180 / 12.40
High Pressure Cylinders (dia x stroke) (in / mm)16" x 24" / 406x610
Tractive Effort (lbs / kg)21,364 / 9690.56
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.12
Heating Ability
Firebox Area (sq ft / m2)90 / 8.36
Grate Area (sq ft / m2)14.40 / 1.34
Evaporative Heating Surface (sq ft / m2)1161 / 107.86
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1161 / 107.86
Evaporative Heating Surface/Cylinder Volume207.88
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2592
Same as above plus superheater percentage2592
Same as above but substitute firebox area for grate area16,200
Power L13808
Power MT286.20

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