Arkansas Southern 4-4-0 "American" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class Dot (Locobase 12062)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Vol 18, p 133. Works number was 13166 in December 1893.

This little Eight-wheeler went into service on this little short line. The AS would connect Camden, Ark with Ruston, Louisiana by 1900. By 1906, Dot was too small for the service it performed so the AS RR sold it to the Tremont Lumber Company, which renumbered it 51.

Principal Dimensions by Steve Llanso of Sweat House Media
Locobase ID12,062
RailroadArkansas Southern
Number in Class1
Road Numbers1
Number Built1
BuilderBurnham, Williams & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 6.50 / 1.98
Engine Wheelbase (ft / m)19.08 / 5.82
Ratio of driving wheelbase to overall engine wheebase 0.34
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)30,000 / 13,608
Engine Weight (lbs / kg)50,000 / 22,680
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)1500 / 5.68
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)25 / 12.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)56 / 1422
Boiler Pressure (psi / kPa)130 / 9
High Pressure Cylinders (dia x stroke) (in / mm)12" x 22" / 305x559
Tractive Effort (lbs / kg)6251 / 2835.41
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.80
Heating Ability
Firebox Area (sq ft / m2)63.40 / 5.89
Grate Area (sq ft / m2)12.10 / 1.12
Evaporative Heating Surface (sq ft / m2)521 / 48.42
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)521 / 48.42
Evaporative Heating Surface/Cylinder Volume180.92
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1573
Same as above plus superheater percentage1573
Same as above but substitute firebox area for grate area8242
Power L13531
Power MT518.97

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Wes Barris