Willamette Bridge Railway 0-6-2 Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class Sunnyside (Locobase 11583)

Data from Baldwin Locomotive Works Specification for Engines, 1888, as digitized by the DeGolyer Library of Southern Methodist University Vol 15, p. 17.

Works numbers were 9847 in March 1889 and 9973 in March.

These two tank engines were ordered by the Pacific Bridge Company on behalf of the WBR of Portland, Ore. As they entered service, they bore the names of destinations: Sunnyside on #2, Mount Tabor on #3.

The WBR was transformed into the City & Suburban Railway in September 1891. during the same period, both dummies were converted to 0-4-2Ts (most likely to reduce the wheelbase). In 1900, both were sold to Star Logging & Lumbering, which soon sold them to Yeon & Pelton, from which they went to Portland Lumber in 1905, and to Japan in 1908.

Specifications by Steve Llanso of Sweat House Media
Locobase ID11,583
RailroadWillamette Bridge Railway
Number in Class2
Road Numbers2-3
Number Built2
BuilderBurnham, Parry, Williams & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft) 4.50
Engine Wheelbase (ft)11.67
Ratio of driving wheelbase to overall engine wheebase 0.39
Overall Wheelbase (engine & tender) (ft)11.67
Axle Loading (Maximum Weight per Axle) (lbs)16,280
Weight on Drivers (lbs)28,000
Engine Weight (lbs)35,350
Tender Loaded Weight (lbs)
Total Engine and Tender Weight (lbs)
Tender Water Capacity (gals)450
Tender Fuel Capacity (oil/coal) (gals/tons)
Minimum weight of rail (calculated) (lb/yd)16
Geometry Relating to Tractive Effort
Driver Diameter (in)36
Boiler Pressure (psi)130
High Pressure Cylinders (dia x stroke) (in)11" x 16"
Tractive Effort (lbs)5942
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.71
Heating Ability
Firebox Area (sq ft)
Grate Area (sq ft) 9.60
Evaporative Heating Surface (sq ft)
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)
Evaporative Heating Surface/Cylinder Volume
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1248
Same as above plus superheater percentage1248
Same as above but substitute firebox area for grate area
Power L1
Power MT

If you have any railroad data such as diagram books, rail station plans or anything else that you would be willing to share, please contact us.