Puget Sound & Baker River 4-6-0 "Ten-wheeler" Locomotives of 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.

Specifications by Steve Llanso of Sweat House Media
Locobase ID15114
RailroadPuget Sound & Baker River
Number in Class2
Road Numbers1-2
Number Built2
BuilderBurnham, Williams & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase11'
Engine Wheelbase21.25'
Ratio of driving wheelbase to overall engine wheebase 0.52
Overall Wheelbase (engine & tender)45.92'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers84000 lbs
Engine Weight104000 lbs
Tender Light Weight60000 lbs
Total Engine and Tender Weight164000 lbs
Tender Water Capacity3000 gals
Tender Fuel Capacity (oil/coal)
Minimum weight of rail (calculated)47 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter46"
Boiler Pressure170 psi
Cylinders (dia x stroke)16" x 24"
Tractive Effort19300 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.35
Heating Ability
Firebox Area120 sq. ft
Grate Area19.70 sq. ft
Evaporative Heating Surface1380 sq. ft
Superheating Surface
Combined Heating Surface1380 sq. ft
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 area20400
Power L14621
Power MT363.84

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