Sierra Nevada Wood & Lumber Company 2-6-0 "Mogul" Locomotives of 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.

Specifications 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)13.42
Engine Wheelbase (ft)19.92
Ratio of driving wheelbase to overall engine wheebase 0.67
Overall Wheelbase (engine & tender) (ft)
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)54,000
Engine Weight (lbs)65,000
Tender Loaded Weight (lbs)50,000
Total Engine and Tender Weight (lbs)115,000
Tender Water Capacity (gals)2500
Tender Fuel Capacity (oil/coal) (gals/tons)
Minimum weight of rail (calculated) (lb/yd)30
Geometry Relating to Tractive Effort
Driver Diameter (in)42.50
Boiler Pressure (psi)165
High Pressure Cylinders (dia x stroke) (in)14" x 20"
Tractive Effort (lbs)12,936
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.17
Heating Ability
Firebox Area (sq ft)74.70
Grate Area (sq ft) 9.80
Evaporative Heating Surface (sq ft)806
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)806
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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