Willamette Bridge Railway 0-4-2 Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class Sunnyside (Locobase 11583)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 15, p. 23. (Thanks to John Taubeneck for his 6 May 2017 email noting errors in the original comments.) Works numbers were 9847 in March 1889 and 9973 in April.

These two tank engines were ordered by the Pacific Beach 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, but the two dummies retained their numbers.

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.

Principal Dimensions by Steve Llanso of Middle Run Media

Locobase ID11583
RailroadWillamette Bridge Railway
Number in Class2
Road Numbers2-3
Number Built2
BuilderBurnham, Parry, Williams & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 4.50 / 1.37
Engine Wheelbase (ft / m)11.67 / 3.56
Ratio of driving wheelbase to overall engine wheelbase 0.39
Overall Wheelbase (engine & tender) (ft / m)11.67 / 3.56
Axle Loading (Maximum Weight per Axle) (lbs / kg)16,280 / 7384
Weight on Drivers (lbs / kg)28,000 / 12,701
Engine Weight (lbs / kg)35,350 / 16,035
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)450 / 1.70
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)23 / 11.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)36 / 914
Boiler Pressure (psi / kPa)130 / 9
High Pressure Cylinders (dia x stroke) (in / mm)11" x 16" / 279x406
Tractive Effort (lbs / kg)5942 / 2695.25
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.71
Heating Ability
Tubes (number - dia) (in / mm)67 - 1.75" / 44
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m) 8.58 / 2.62
Firebox Area (sq ft / m2)
Grate Area (sq ft / m2) 9.60 / 0.89
Evaporative Heating Surface (sq ft / m2)
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)
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

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