Weatherford, Mineral Wells & North Western 2-8-0 "Consolidation" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 4 (Locobase 15117)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Vol 43, pp. 150+. See also Chris Cravens, "WEATHERFORD, MINERAL WELLS AND NORTHWESTERN RAILWAY," Handbook of Texas Online (, accessed April 08, 2013. Published by the Texas State Historical Association. Works number 39341 in February 1913.

Cravens tells us that the WMW&NW was chartered on 2 July 1889 to build a 25-mile (40.3 km) railway from Weatherford, Tex (west of Fort Worth) west to Mineral Wells. After the T&P bought the Mineral Wells, it financed an 18-mile (29 km) extension to Graford, which lay northwest of Mineral Wells. The new section opened in 1908.

The WMW&NW never owned very many locomotives (three was the maximum at any one time), so the 4 pulled any kind of duty that seemed to be called for. It was finally retired in June 1938.

Specifications by Steve Llanso of Sweat House Media
Locobase ID15117
RailroadWeatherford, Mineral Wells & North Western
Number in Class1
Road Numbers4
Number Built1
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase15.83'
Engine Wheelbase23.67'
Ratio of driving wheelbase to overall engine wheebase 0.67
Overall Wheelbase (engine & tender)51.92'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers132000 lbs
Engine Weight148000 lbs
Tender Light Weight90000 lbs
Total Engine and Tender Weight238000 lbs
Tender Water Capacity4500 gals
Tender Fuel Capacity (oil/coal)10 tons
Minimum weight of rail (calculated)55 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter57"
Boiler Pressure200 psi
Cylinders (dia x stroke)20" x 26"
Tractive Effort31018 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.26
Heating Ability
Firebox Area146 sq. ft
Grate Area29 sq. ft
Evaporative Heating Surface1912 sq. ft
Superheating Surface
Combined Heating Surface1912 sq. ft
Evaporative Heating Surface/Cylinder Volume202.25
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation5800
Same as above plus superheater percentage5800
Same as above but substitute firebox area for grate area29200
Power L15310
Power MT354.74

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