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

Class Details by Steve Llanso of Sweat House Media

Class 56 (Locobase 12756)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 27, p. 199. See also Nancy Beck Young, "TEXAS SOUTHERN RAILWAY," Handbook of Texas Online (http://www.tshaonline.org/handbook/online/articles/eqtgq), accessed June 23, 2011. Published by the Texas State Historical Association. Works numbers were 25211, 25244 in March 1905.

Two of many light-footed Ten-wheelers produced at this time, this pair for an east Texas line that succeeded to the assets of the bankrupt Paris, Marshall & Sabine Pass in 1897. It was dependent on logging demand and never found firm foundation in other business lines. Its assets were bought up by the Marshall & East Texas in 1908, but that group had little better success and rolled up in the mid-teens.

Specifications by Steve Llanso of Sweat House Media
Locobase ID12,756
RailroadTexas Southern
Number in Class2
Road Numbers56-57
Number Built2
BuilderBurnham, Williams & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft)15
Engine Wheelbase (ft)25.17
Ratio of driving wheelbase to overall engine wheebase 0.60
Overall Wheelbase (engine & tender) (ft)
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)88,500
Engine Weight (lbs)116,000
Tender Loaded Weight (lbs)80,000
Total Engine and Tender Weight (lbs)196,000
Tender Water Capacity (gals)4000
Tender Fuel Capacity (oil/coal) (gals/tons)
Minimum weight of rail (calculated) (lb/yd)49
Geometry Relating to Tractive Effort
Driver Diameter (in)57
Boiler Pressure (psi)180
High Pressure Cylinders (dia x stroke) (in)18" x 24"
Tractive Effort (lbs)20,872
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.24
Heating Ability
Firebox Area (sq ft)122.70
Grate Area (sq ft)22
Evaporative Heating Surface (sq ft)1567
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)1567
Evaporative Heating Surface/Cylinder Volume221.69
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation3960
Same as above plus superheater percentage3960
Same as above but substitute firebox area for grate area22,086
Power L15275
Power MT394.22