Southern Lumber 4-6-0 "Ten-wheeler" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 123 (Locobase 13058)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 30, p. . Works numbers were 30555 in April 1907.

Most of the orders recorded in Baldwin's books were filled for the original purchaser. But the 8 locomotives intended for the Morelia y Tacambaro in Guanajunto, Mexico were redirected to several other railroads.

This engine served SLC in Arkansas all of its working life. When it was retired, the SLC donated the 123 to the City of Warren, Ark

Specifications by Steve Llanso of Sweat House Media
Locobase ID13058
RailroadSouthern Lumber
Number in Class1
Road Numbers123
Number Built1
BuilderBurnham, Williams & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase14.25'
Engine Wheelbase24.92'
Ratio of driving wheelbase to overall engine wheebase 0.57
Overall Wheelbase (engine & tender)
Axle Loading (Maximum Weight per Axle)
Weight on Drivers88000 lbs
Engine Weight120000 lbs
Tender Light Weight80000 lbs
Total Engine and Tender Weight200000 lbs
Tender Water Capacity4000 gals
Tender Fuel Capacity (oil/coal)
Minimum weight of rail (calculated)49 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter54"
Boiler Pressure180 psi
Cylinders (dia x stroke)18" x 24"
Tractive Effort22032 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.99
Heating Ability
Firebox Area144 sq. ft
Grate Area17.30 sq. ft
Evaporative Heating Surface1788 sq. ft
Superheating Surface
Combined Heating Surface1788 sq. ft
Evaporative Heating Surface/Cylinder Volume252.95
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation3114
Same as above plus superheater percentage3114
Same as above but substitute firebox area for grate area25920
Power L15748
Power MT432.01


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