Sierra Nevada Wood & Lumber Company 2-6-0 "Mogul" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 6 (Locobase 12472)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Vol 29, p. 62. Works number was 27923 in April 1906..

The specs called for this Mogul to scale 3% grades and negotiate 18-deg curves on the 8 miles of this small logging railroad.

After the Hobart Southern was abandoned in December 1937, the 6 was sold.

Principal Dimensions by Steve Llanso of Sweat House Media
Locobase ID12,472
RailroadSierra Nevada Wood & Lumber Company
Number in Class1
Road Numbers6
Number Built1
BuilderBurnham, Williams & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)13.42 / 4.09
Engine Wheelbase (ft / m)19.92 / 6.07
Ratio of driving wheelbase to overall engine wheebase 0.67
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)54,000 / 24,494
Engine Weight (lbs / kg)65,000 / 29,484
Tender Loaded Weight (lbs / kg)50,000 / 22,680
Total Engine and Tender Weight (lbs / kg)115,000 / 52,164
Tender Water Capacity (gals / ML)2500 / 9.47
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)30 / 15
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)42.50 / 1080
Boiler Pressure (psi / kPa)165 / 11.40
High Pressure Cylinders (dia x stroke) (in / mm)14" x 20" / 356x508
Tractive Effort (lbs / kg)12,936 / 5867.68
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.17
Heating Ability
Firebox Area (sq ft / m2)74.70 / 6.94
Grate Area (sq ft / m2) 9.80 / 0.91
Evaporative Heating Surface (sq ft / m2)806 / 74.91
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)806 / 74.91
Evaporative Heating Surface/Cylinder Volume226.19
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1617
Same as above plus superheater percentage1617
Same as above but substitute firebox area for grate area12,326
Power L13869
Power MT473.87

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Wes Barris