Alexander & Rich Mountain 2-4-2 "Columbian" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class W G Warden (Locobase 12023)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Vol 17, p. 242. Works number was 12517 in March 1892.

Bought by the Alexander Boom & Lumber Company, this little tank operated on the A & RM. It was sold first to Panther Lumber and later to the W M Ritter Lumber Company in 1913

Specifications by Steve Llanso of Sweat House Media
ClassW G Warden
Locobase ID12023
RailroadAlexander & Rich Mountain
Number in Class1
Road Numbers
Number Built1
BuilderBurnham, Williams & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase5'
Engine Wheelbase18.50'
Ratio of driving wheelbase to overall engine wheebase 0.27
Overall Wheelbase (engine & tender)18.50'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers28000 lbs
Engine Weight42000 lbs
Tender Light Weight
Total Engine and Tender Weight42000 lbs
Tender Water Capacity750 gals
Tender Fuel Capacity (oil/coal)
Minimum weight of rail (calculated)23 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter38"
Boiler Pressure130 psi
Cylinders (dia x stroke)11" x 16"
Tractive Effort5630 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.97
Heating Ability
Firebox Area49.12 sq. ft
Grate Area 7.20 sq. ft
Evaporative Heating Surface307 sq. ft
Superheating Surface
Combined Heating Surface307 sq. ft
Evaporative Heating Surface/Cylinder Volume174.44
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation936
Same as above plus superheater percentage936
Same as above but substitute firebox area for grate area6386
Power L12585
Power MT407.07

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