Stewartstown 2-6-0 "Mogul" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 4 (Locobase 13945)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 47, p. 241. See also a brief history of the railroad at the Friends of the Stewartstown Railroad site (, last accessed 14 March 2012.) Works number was 40016 in June 1913.

The "farmer's railroad" ran in southern York County's Deer Creek Valley in Pennsylvania just above the Maryland border. After it took over the New Park & Fawn Grove, it measured a full 16 miles in length. The Stewartstown nevertheless remained in service for decades after its opening in 1885.

Specifications by Steve Llanso of Sweat House Media
Locobase ID13,945
Number in Class1
Road Numbers4
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)47.07
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)90,000
Engine Weight (lbs)104,000
Tender Loaded Weight (lbs)60,000
Total Engine and Tender Weight (lbs)164,000
Tender Water Capacity (gals)3000
Tender Fuel Capacity (oil/coal) (gals/tons)6
Minimum weight of rail (calculated) (lb/yd)50
Geometry Relating to Tractive Effort
Driver Diameter (in)48
Boiler Pressure (psi)175
High Pressure Cylinders (dia x stroke) (in)17" x 24"
Tractive Effort (lbs)21,494
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.19
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 Computation3675
Same as above plus superheater percentage3675
Same as above but substitute firebox area for grate area20,300
Power L14239
Power MT311.51

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