Thornton & Alexander 2-8-0 "Consolidation" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 6 (Locobase 13912)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 41, p. 142. See also "Thornton (Calhoun County)" in the Encyclopedia of Arkansas at, last accessed 1 March 2012. Works number was 37174 in November 1911.

Small and light-footed this Consolidation had to be as rail weights of 35, 40, and 60 lb/yard (17.5, 20, and 30 kg/metre) were the norm on this Arkansas short line. William M and Angelina W Stout owned both the railroad and the Stout-Greer Lumber Company for which it was built beginning in 1904. The main line ran 22.6 miles from Thornton to Hampton. The Encyclopedia of Arkansas claims that Stout-Greer was unique (although it does not say within what universe this was true) " in that it employed numerous Mexican workers in addition to white and African-American workers."

According to Gene Connelly's Baldwin list, the 6 had a short career. It went to work for the Southern Lumber & Timber Company of Warren, Ark on their Black Bayou Railroad, but was dismantled in April 1922.

Specifications by Steve Llanso of Sweat House Media
Locobase ID13,912
RailroadThornton & Alexander
Number in Class1
Road Numbers6
Number Built1
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft)12.25
Engine Wheelbase (ft)19.83
Ratio of driving wheelbase to overall engine wheebase 0.62
Overall Wheelbase (engine & tender) (ft)
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)86,000
Engine Weight (lbs)100,000
Tender Loaded Weight (lbs)80,000
Total Engine and Tender Weight (lbs)180,000
Tender Water Capacity (gals)4000
Tender Fuel Capacity (oil/coal) (gals/tons)6
Minimum weight of rail (calculated) (lb/yd)36
Geometry Relating to Tractive Effort
Driver Diameter (in)44
Boiler Pressure (psi)175
High Pressure Cylinders (dia x stroke) (in)16" x 24"
Tractive Effort (lbs)20,771
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.14
Heating Ability
Firebox Area (sq ft)104
Grate Area (sq ft)19.80
Evaporative Heating Surface (sq ft)1147
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)1147
Evaporative Heating Surface/Cylinder Volume205.37
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation3465
Same as above plus superheater percentage3465
Same as above but substitute firebox area for grate area18,200
Power L13830
Power MT392.73

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