Lancaster & Chester 4-6-0 "Ten-wheeler" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 30 (Locobase 13689)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 35, p. 321 and 41, p. 128. Works numbers were 34917 in July 1910 and 37994 in June 1912.

The specs called for this pair to handle maximum grades of 2.1% and relatively gentle 6-degree (627 ft/191 metre radius) curves on the main line and much tighter 24-degree curvs on sidings.

See Locobase 11756 for the story of the Springmaid Line. See also the Springmaid Line's website history at, last accessed 7 January 2012.

Specifications by Steve Llanso of Sweat House Media
Locobase ID13689
RailroadLancaster & Chester
Number in Class2
Road Numbers30-31
Number Built2
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase11.33'
Engine Wheelbase21.83'
Ratio of driving wheelbase to overall engine wheebase 0.52
Overall Wheelbase (engine & tender)
Axle Loading (Maximum Weight per Axle)
Weight on Drivers103000 lbs
Engine Weight130000 lbs
Tender Light Weight90000 lbs
Total Engine and Tender Weight220000 lbs
Tender Water Capacity4500 gals
Tender Fuel Capacity (oil/coal)7 tons
Minimum weight of rail (calculated)57 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter56"
Boiler Pressure180 psi
Cylinders (dia x stroke)19" x 26"
Tractive Effort25644 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.02
Heating Ability
Firebox Area157 sq. ft
Grate Area25 sq. ft
Evaporative Heating Surface1949 sq. ft
Superheating Surface
Combined Heating Surface1949 sq. ft
Evaporative Heating Surface/Cylinder Volume228.43
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation4500
Same as above plus superheater percentage4500
Same as above but substitute firebox area for grate area28260
Power L15383
Power MT345.65

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