Mine La Motte Company 2-6-2 "Prairie" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 3 (Locobase 14254)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 52, p. 88. Works number was 42137 in June 1915.

Named (corruptedly) for its founder, Rhode Island native La Mothe, was a well-known pig lead producer. This relatively heavy low-drivered Prairie was tasked to run on 54 lb/yard (27 kg/metre) rail.

By 1923, the engine had been sold to locomotive rebuilder/reseller Birmingham Rail & Locomotive. BR&L sold the "Aberdeen", as it had been dubbed, to New Deemer Manufacturing of New Deemer, Miss. Within a year, New Deemer had sold out to Adams-Newell Lumber Company and that company almost immediately disposed of the 4 with BR&L. In July 1925, Reynolds-West Lumber Company (Burnside, Miss) bought the logging Prairie; this company would later be reorganized as Marietta Lumber Company in 1928.

Specifications by Steve Llanso of Sweat House Media
Locobase ID14254
RailroadMine La Motte Company
Number in Class1
Road Numbers3
Number Built1
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase10'
Engine Wheelbase24.75'
Ratio of driving wheelbase to overall engine wheebase 0.40
Overall Wheelbase (engine & tender)48.17'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers95500 lbs
Engine Weight128500 lbs
Tender Light Weight70000 lbs
Total Engine and Tender Weight198500 lbs
Tender Water Capacity3500 gals
Tender Fuel Capacity (oil/coal)6 tons
Minimum weight of rail (calculated)53 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter44"
Boiler Pressure180 psi
Cylinders (dia x stroke)17" x 24"
Tractive Effort24118 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.96
Heating Ability
Firebox Area106 sq. ft
Grate Area23.30 sq. ft
Evaporative Heating Surface2378 sq. ft
Superheating Surface
Combined Heating Surface2378 sq. ft
Evaporative Heating Surface/Cylinder Volume377.16
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation4194
Same as above plus superheater percentage4194
Same as above but substitute firebox area for grate area19080
Power L16088
Power MT421.62

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