Puget Sound & Baker River 4-6-0 "Ten-Wheeler" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 1 (Locobase 15114)

Data from Baldwin Locomotive Works datacard as digitized by the DeGolyer Library of Southern Methodist University, Volume 43, p. 173. Works numbers were 31472 in August 1907 and 39058 in January 1913.

The PS&BR was chartered as a common-carrier and these two Baldwins were the first new locomotives on the road. Although it conveyed general freight and even a few passengers, its layout was dictated by the lumber business. Maximum grades reached 6% and curves bent around at 25 degrees.

By 1914, the 23 1/2 mile (37.8 km) long railway reported to the Washington State Public Service Commission that in addition to the logs it moved down the Skagit River, it received 5,042 tons of crude oil, machinery, and general supplies and 12,402 tons of sand and gravel.

The 1 never left and was scrapped in July 1957, fifteen years after PS&BR stopped operating as a common carrier. The 2 was donated for display at Sedro-Woolley, Wash in 1956.

Principal Dimensions by Steve Llanso of Sweat House Media
Locobase ID15,114
RailroadPuget Sound & Baker River
Number in Class2
Road Numbers1-2
Number Built2
BuilderBurnham, Williams & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)11 / 3.35
Engine Wheelbase (ft / m)21.25 / 6.48
Ratio of driving wheelbase to overall engine wheebase 0.52
Overall Wheelbase (engine & tender) (ft / m)45.92 / 14
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)84,000 / 38,102
Engine Weight (lbs / kg)104,000 / 47,174
Tender Loaded Weight (lbs / kg)60,000 / 27,216
Total Engine and Tender Weight (lbs / kg)164,000 / 74,390
Tender Water Capacity (gals / ML)3000 / 11.36
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)47 / 23.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)46 / 1168
Boiler Pressure (psi / kPa)170 / 11.70
High Pressure Cylinders (dia x stroke) (in / mm)16" x 24" / 406x610
Tractive Effort (lbs / kg)19,300 / 8754.34
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.35
Heating Ability
Firebox Area (sq ft / m2)120 / 11.15
Grate Area (sq ft / m2)19.70 / 1.83
Evaporative Heating Surface (sq ft / m2)1380 / 128.21
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1380 / 128.21
Evaporative Heating Surface/Cylinder Volume247.09
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation3349
Same as above plus superheater percentage3349
Same as above but substitute firebox area for grate area20,400
Power L14621
Power MT363.84

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