Florala Saw Mill Company 2-6-2 "Prairie" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 100 (Locobase 11010)

Data from "Logging Locomotives", Record of Recent Construction #96 (Baldwin Locomotive Works, 1918), p. 12-13. See also DeGolyer, Vol 62, pp. 331+. (Thanks to Chris Hohl for his January 2014 email stating the tender capacity.) Works numbers were 52261 in August 1919 and 52293 in September.

Among the many logging Prairies built in the late 'teens-early 20s, this pair went to the Florala. Sporting the Rushton cabbage stack that signified a wood-burner in need of spark-arresting, they showed a typical light-engine profile.The tender carried three cords of wood.

Locobase isn't sure what happened to the #101. The #100 would have a long history. After only 4 years serving the Florala, it was sold to the Alger-Sullivan Lumber Company and put in service on the common carrier Escambia Railway. For the next 3 decades, it operated out of Century, Fla. When it was retired, #100 was put in display for the next 20 years. Purchased off the scrap pile by the Whitewater Valley Railway of Connersville, Ind, the engine was restored and ran for two more decades in tourist service.

Brought back home by the Alger-Sullivan Historical Society, the #100 waited for several years for restoration funds to be lined up. One advantage was the previous acquisition of a new boiler and firebox. In 2008, the Society was able to begin actual restoration work.

Principal Dimensions by Steve Llanso of Sweat House Media
Locobase ID11010
RailroadFlorala Saw Mill Company
Number in Class2
Road Numbers100-101
Number Built2
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m) 9.17 / 2.80
Engine Wheelbase (ft / m)23.75 / 7.24
Ratio of driving wheelbase to overall engine wheelbase 0.39
Overall Wheelbase (engine & tender) (ft / m)45.56 / 13.89
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)67,800 / 30,754
Engine Weight (lbs / kg)91,950 / 41,708
Tender Loaded Weight (lbs / kg)70,000 / 31,752
Total Engine and Tender Weight (lbs / kg)161,950 / 73,460
Tender Water Capacity (gals / ML)3500 / 13.26
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)38 / 19
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)15" x 24" / 381x610
Tractive Effort (lbs / kg)18,777 / 8517.11
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.61
Heating Ability
Tubes (number - dia) (in / mm)160 - 2" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)11.87 / 3.62
Firebox Area (sq ft / m2)86 / 7.99
Grate Area (sq ft / m2)14.10 / 1.31
Evaporative Heating Surface (sq ft / m2)1074 / 99.81
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1074 / 99.81
Evaporative Heating Surface/Cylinder Volume218.74
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2538
Same as above plus superheater percentage2538
Same as above but substitute firebox area for grate area15,480
Power L14043
Power MT394.39

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