Aransas Harbor Terminal 2-6-0 "Mogul" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 2 (Locobase 14107)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 47, p. 239. See also the Handbook of Texas entry at Keith Guthrie, "ARANSAS HARBOR TERMINAL RAILWAY," Handbook of Texas Online (, accessed May 02, 2012. Published by the Texas State Historical Association. Works number was 39653 in April 1913.

Although the original 1892 plan called for a privately funded 10-mile line to connect Harbor Island and the San Antonio & Aransas Pass Railroad and a 3 1/2-mile line was built on a series of man-made islands, the road that bought the #2 was quite different. It took a 1907 project by the Army Corps of Engineers to dig out the Aransas Pass in 1907 and the 1909 Aransas Pass Channel and Dock Company effort to dredge an 8 1/2-foot deep, 100-foot wide channel to lay the ground work (literally) for the embankment that hosted the AHTR.

Serving the newly established oil port was the railway's primary mission and it provided almost no passenger business until World War I demands led to the conversion of a Ford truck into a passenger vehicle. The AHTR continued hauling tank cars, but after 1926 suffered from competition from Corpus Christi. The railway closed in 1947.

Specifications by Steve Llanso of Sweat House Media
Locobase ID14,107
RailroadAransas Harbor Terminal
Number in Class1
Road Numbers2
Number Built1
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft)12
Engine Wheelbase (ft)19.83
Ratio of driving wheelbase to overall engine wheebase 0.61
Overall Wheelbase (engine & tender) (ft)49.65
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)88,900
Engine Weight (lbs)103,000
Tender Loaded Weight (lbs)70,000
Total Engine and Tender Weight (lbs)173,000
Tender Water Capacity (gals)3500
Tender Fuel Capacity (oil/coal) (gals/tons)1500
Minimum weight of rail (calculated) (lb/yd)49
Geometry Relating to Tractive Effort
Driver Diameter (in)48
Boiler Pressure (psi)170
High Pressure Cylinders (dia x stroke) (in)17" x 24"
Tractive Effort (lbs)20,880
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.26
Heating Ability
Firebox Area (sq ft)116
Grate Area (sq ft)21
Evaporative Heating Surface (sq ft)1329
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)1329
Evaporative Heating Surface/Cylinder Volume210.79
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation3570
Same as above plus superheater percentage3570
Same as above but substitute firebox area for grate area19,720
Power L14118
Power MT306.37

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