South Western of Arizona 2-8-0 "Consolidation" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 2 (Locobase 12522)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 24, p. 42. Works numbers were 19497, 19500 in August 1901; 19673-19675 in November.

All of this class were converted in 1916 to 0-8-0 switchers. As such, they were taken into the Southern Pacific in 1924.

Specifications by Steve Llanso of Sweat House Media
Locobase ID12,522
RailroadSouth Western of Arizona (EP&SW)
Number in Class1
Road Numbers2-6 / 50-54 / 209-213
Number Built1
BuilderBurnham, Williams & Co
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft)14.25
Engine Wheelbase (ft)22.83
Ratio of driving wheelbase to overall engine wheebase 0.62
Overall Wheelbase (engine & tender) (ft)
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)154,000
Engine Weight (lbs)170,000
Tender Loaded Weight (lbs)100,000
Total Engine and Tender Weight (lbs)270,000
Tender Water Capacity (gals)5000
Tender Fuel Capacity (oil/coal) (gals/tons)
Minimum weight of rail (calculated) (lb/yd)64
Geometry Relating to Tractive Effort
Driver Diameter (in)51
Boiler Pressure (psi)190
High Pressure Cylinders (dia x stroke) (in)22" x 28"
Tractive Effort (lbs)42,915
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.59
Heating Ability
Firebox Area (sq ft)200
Grate Area (sq ft)37
Evaporative Heating Surface (sq ft)2630
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)2630
Evaporative Heating Surface/Cylinder Volume213.49
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation7030
Same as above plus superheater percentage7030
Same as above but substitute firebox area for grate area38,000
Power L14759
Power MT272.51

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