Puget Sound & Grays Harbor 2-6-0 "Mogul" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class Chehalis (Locobase 11670)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Vol 14, p.82. See also [], last accessed 10 January 2012.

Works number was 9112 in March 1888.

This Mogul was the only locomotive operated by the PBMC at the time on its 8-mile Puget Sound & Grays Harbor line in western Washington. The railroad was established in 1882 as a way to get logs to the West Coast's largest sawmill from Mason County. Ned Skinner and John W Eddy bought the PBMC in 1903 and held it for 20 years. Eddy would carry on and after World War II turn to sustainable tree-harvesting;.

2 was sold in 1917 to the Stimson Mill Company.

Principal Dimensions by Steve Llanso of Sweat House Media
Locobase ID11,670
RailroadPuget Sound & Grays Harbor
Number in Class1
Road Numbers2
Number Built1
BuilderBurnham, Parry, Williams & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)14.50 / 4.42
Engine Wheelbase (ft / m)21.83 / 6.65
Ratio of driving wheelbase to overall engine wheebase 0.66
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)64,000 / 29,030
Engine Weight (lbs / kg)80,000 / 36,287
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)2600 / 9.85
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)36 / 18
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)54 / 1372
Boiler Pressure (psi / kPa)130 / 9
High Pressure Cylinders (dia x stroke) (in / mm)17" x 24" / 432x610
Tractive Effort (lbs / kg)14,193 / 6437.84
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.51
Heating Ability
Firebox Area (sq ft / m2)102.50 / 9.53
Grate Area (sq ft / m2)15.50 / 1.44
Evaporative Heating Surface (sq ft / m2)1136 / 105.58
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1136 / 105.58
Evaporative Heating Surface/Cylinder Volume180.17
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2015
Same as above plus superheater percentage2015
Same as above but substitute firebox area for grate area13,325
Power L13059
Power MT316.12

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