W G Mitchell Lumber Company 2-6-2 "Prairie" Locomotives of the USA


Class Details by Steve Llanso of Sweat House Media

Class 6 (Locobase 14951)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Vol 65, p. 192+. Works number was 54783 in May 1921.

Baldwin's 45-ton logging Prairie had saturated boilers measuring just under 1,000 sq ft (92.9 sq m) in heating surface area with grate areas of between 13.7 and 14.1 sq ft (1.3 sq m, approximately). By the time this shortleaf lumberer (headquartered in the west central Alabama town of Shortleaf bought its engine, the design was well established. WGMLC's railway profile included 18-degree curves (radii of 210 ft/64 m) and challenging 4% grades.

East Alabama Lumber, which was established about 140 miles (225 km) east near Tuskegee in east central Alabama in 1925, bought the 6 from Mitchell in 1927. The EALC was serious about exploiting timber stands northeast of the town and built 25 miles (42.5 km) miles of railway from Chehaw to Society Hill.

Still numbered 6 a decade later, the locomotive then served the Alabama & Western Florida, a 1926 reorganization of the 19.25 miles run by the Birmingham, Columbus, & St. Andrews between Chipley and Greenhead, Fla.

Specifications by Steve Llanso of Sweat House Media
Class6
Locobase ID14,951
RailroadW G Mitchell Lumber Company
CountryUSA
Whyte2-6-2
Number in Class1
Road Numbers6
GaugeStd
Number Built1
BuilderBaldwin
Year1921
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft) 9.17
Engine Wheelbase (ft)23.75
Ratio of driving wheelbase to overall engine wheebase 0.39
Overall Wheelbase (engine & tender) (ft)45.17
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)68,000
Engine Weight (lbs)89,000
Tender Loaded Weight (lbs)65,000
Total Engine and Tender Weight (lbs)154,000
Tender Water Capacity (gals)3000
Tender Fuel Capacity (oil/coal) (gals/tons)6
Minimum weight of rail (calculated) (lb/yd)38
Geometry Relating to Tractive Effort
Driver Diameter (in)44
Boiler Pressure (psi)190
High Pressure Cylinders (dia x stroke) (in)15" x 20"
Tractive Effort (lbs)16,517
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.12
Heating Ability
Firebox Area (sq ft)87
Grate Area (sq ft)14.10
Evaporative Heating Surface (sq ft)995
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)995
Evaporative Heating Surface/Cylinder Volume243.24
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2679
Same as above plus superheater percentage2679
Same as above but substitute firebox area for grate area16,530
Power L14871
Power MT473.77


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