Gates Lumber Company 2-6-2 "Prairie" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 7 (Locobase 13719)

Data from DeGolyer, Volume 36, p. 150. See also The Encyclopedia of Arkansas History and Culture entry on the timber industry at, last accessed 13 January 2012. Works number was 36043 in February 1911.

Locobase cannot establish what the "W & SV" that was to be lettered on the tender might actually have been. Gates Lumber Company was headquartered in Wilmar, Ark. The little logging Prairie in this entry - a standard type sold by Baldwin all over the South and West - wound up working for Crossett Lumber.

Specifications by Steve Llanso of Sweat House Media
Locobase ID13719
RailroadGates Lumber Company (W & SV)
Number in Class1
Road Numbers7
Number Built1
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase 9.17'
Engine Wheelbase23.75'
Ratio of driving wheelbase to overall engine wheebase 0.39
Overall Wheelbase (engine & tender)
Axle Loading (Maximum Weight per Axle)
Weight on Drivers62000 lbs
Engine Weight84000 lbs
Tender Light Weight60000 lbs
Total Engine and Tender Weight144000 lbs
Tender Water Capacity3000 gals
Tender Fuel Capacity (oil/coal)6 tons
Minimum weight of rail (calculated)34 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter46"
Boiler Pressure180 psi
Cylinders (dia x stroke)15" x 20"
Tractive Effort14967 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.14
Heating Ability
Firebox Area82 sq. ft
Grate Area14.10 sq. ft
Evaporative Heating Surface990 sq. ft
Superheating Surface
Combined Heating Surface990 sq. ft
Evaporative Heating Surface/Cylinder Volume242.02
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 area14760
Power L14723
Power MT503.83

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