Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 9, p. 147. Works numbers were 4722-4723 in July 1879.
The "Dummy Line" started its street railway operation with these two little tanks in 1879. By 1887, the steam dummies were supplanted in their primary roles by electric trolley cars, but it was six years later that they went to the Rochester & Irondequoit Railway. When that was electrified in 1900, the line was renamed the Rochester & Suburban when the Dummy Line's assets were merged with the existing R&S.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 1 |
| Locobase ID | 11757 |
| Railroad | Rochester & Lake Ontario |
| Country | USA |
| Whyte | 0-4-2T |
| Number in Class | 2 |
| Road Numbers | 1-2 |
| Gauge | Std |
| Number Built | 2 |
| Builder | Burnham, Parry, Williams & Co |
| Year | 1879 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 6 / 1.83 |
| Engine Wheelbase (ft / m) | 11.50 / 3.51 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.52 |
| Overall Wheelbase (engine & tender) (ft / m) | 11.50 / 3.51 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 26,000 / 11,793 |
| Engine Weight (lbs / kg) | 33,000 / 14,969 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 530 / 2.01 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 22 / 11 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 42 / 1067 |
| Boiler Pressure (psi / kPa) | 130 / 900 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 10" x 16" / 254x406 |
| Tractive Effort (lbs / kg) | 4210 / 1909.63 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 6.18 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 111 - 1.5" / 38 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 6.04 / 1.84 |
| Firebox Area (sq ft / m2) | 36 / 3.35 |
| Grate Area (sq ft / m2) | 9.80 / 0.91 |
| Evaporative Heating Surface (sq ft / m2) | 295 / 27.42 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 295 / 27.42 |
| Evaporative Heating Surface/Cylinder Volume | 203.45 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 1274 |
| Same as above plus superheater percentage | 1274 |
| Same as above but substitute firebox area for grate area | 4680 |
| Power L1 | 2981 |
| Power MT | 505.54 |