Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 15, p. 56. See Locobase 16366 for a skeptical 1877 view of steam dummies and Locobase 11577 for a supporting 1889 discussion of the problems associated with running steam dummies on urban street railways. Works numbers were 9944-9945 in April 1889.
These were steam dummies that pulled cars on Union Avenue of Portland to the Columbia River. The route was electrified in 1892 and these were retired. A fire in October 1896 apparently wrecked both engines.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 2 |
| Locobase ID | 11608 |
| Railroad | Portland & Vancouver |
| Country | USA |
| Whyte | 2-4-2T |
| Number in Class | 2 |
| Road Numbers | 2-3 |
| Gauge | 3' |
| Number Built | 2 |
| Builder | Burnham, Parry, Williams & Co |
| Year | 1889 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 5 / 1.52 |
| Engine Wheelbase (ft / m) | 18.08 / 5.51 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.28 |
| Overall Wheelbase (engine & tender) (ft / m) | 18.08 / 5.51 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 14,520 / 6586 |
| Weight on Drivers (lbs / kg) | 27,800 / 12,610 |
| Engine Weight (lbs / kg) | 42,690 / 19,364 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 500 / 1.89 |
| 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) | 39 / 991 |
| Boiler Pressure (psi / kPa) | 130 / 900 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 12" x 16" / 305x406 |
| Tractive Effort (lbs / kg) | 6528 / 2961.05 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.26 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 92 - 1.5" / 38 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 8.37 / 2.55 |
| Firebox Area (sq ft / m2) | |
| Grate Area (sq ft / m2) | 7.50 / 0.70 |
| 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 Computation | 975 |
| Same as above plus superheater percentage | 975 |
| Same as above but substitute firebox area for grate area | |
| Power L1 | |
| Power MT | |