Florida & Alabama 2-6-2 "Prairie" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 18 (Locobase 14267)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 62, p. 348+.(Many thanks to Chris Hohl for 2 June 2015 email flagging an error in the driver diameter and noting the different fuels in the two locomotives.) Works numbers were 52850, 52918 in January 1920.

Locobases 14265-14266 show the four logging Prairies (14-17) that came to the WB Harbeson Lumber Company of De Funiak Springs. The last one trailed a larger tender, but was otherwise identical.

This next batch were bigger, had more cylinder volume, rolled on taller drivers and longer wheelbases, and had superheated boilers and larger fireboxes. Unlike the other two 1920 batches, which bore Bagdad Land and Lumber Company on their tenders, this pair was assigned to the F&A in Munson, Fla.

18 burned soft coal and had the tender shown in the specs. 19 burned oil; its tender carried 1,800 US gallons (6,831 litres) of oil in addition to the 4,000 gallons of water.

18 later worked the Mobile River Saw Mill Company. It then enjoyed a second career on tourist roads such as the Reese Central Railroad owned by Fred Stock, and the Dry Gulch & Tombstone Railroad.

19 was sold to locomotive rebuilder/reseller Georgia Car & Locomotive, which found a buyer in the Roscoe, Snyder & Pacific of Roscoe, Tex as their #5. After its operating days ended, it went on display.

Specifications by Steve Llanso of Sweat House Media
Locobase ID14267
RailroadFlorida & Alabama
Number in Class2
Road Numbers18-19
Number Built2
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase10.25'
Engine Wheelbase26.83'
Ratio of driving wheelbase to overall engine wheebase 0.38
Overall Wheelbase (engine & tender)50.37'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers98000 lbs
Engine Weight127800 lbs
Tender Light Weight80000 lbs
Total Engine and Tender Weight207800 lbs
Tender Water Capacity4000 gals
Tender Fuel Capacity (oil/coal)8 tons
Minimum weight of rail (calculated)54 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter50"
Boiler Pressure180 psi
Cylinders (dia x stroke)17" x 24"
Tractive Effort21224 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.62
Heating Ability
Firebox Area100 sq. ft
Grate Area18.70 sq. ft
Evaporative Heating Surface1248 sq. ft
Superheating Surface292 sq. ft
Combined Heating Surface1540 sq. ft
Evaporative Heating Surface/Cylinder Volume197.94
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation3366
Same as above plus superheater percentage4006
Same as above but substitute firebox area for grate area21420
Power L110411
Power MT702.62

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