Built as a helper by James Milholland to handle trains up the Falls Grade which traversed the ridge between the Schuykill and Delaware Rivers near Philadelphia. A great hulking beast with a camelback-style cab perched on the boiler, this first-of-a-kind twelve-coupled had no tender and no bunkerage. The huge, wide firebox was stoked at the beginning of the slog up the grade and that sufficed.
The lightly built freight cars of the time couldn't handle the high drawbar pull and the locomotive was converted to a more orthodox banker in 1870.
| Specifications | |
|---|---|
| Class | Pennsylvania |
| Locobase ID | 5959 |
| Railroad | Reading |
| Whyte | 0-12-0T |
| Road Numbers | |
| Gauge | Std |
| Builder | Reading |
| Year | 1863 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase | 19.58' |
| Engine Wheelbase | 19.58' |
| Ratio of driving wheelbase to overall engine wheebase | 1 |
| Overall Wheelbase (engine & tender) | |
| Axle Loading (Maximum Weight per Axle) | |
| Weight on Drivers | 110250 lbs |
| Engine Weight | 110250 lbs |
| Tender Light Weight | |
| Total Engine and Tender Weight | 110250 lbs |
| Tender Water Capacity | |
| Tender Fuel Capacity (oil/coal) | |
| Minimum weight per yard of rail on which locomotive could run | 31 lb rail |
| Geometry Relating to Tractive Effort | |
| Driver Diameter | 43" |
| Boiler Pressure | 100 psi |
| Cylinders (dia x stroke) | 20" x 26" |
| Tractive Effort | 20558 lbs |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 5.36 |
| Heating Ability | |
| Firebox Area | |
| Grate Area | 31.20 sq. ft |
| Evaporative Heating Surface | 1399 |
| Superheating Surface | |
| Combined Heating Surface | 1399 |
| Evaporative Heating Surface/Cylinder Volume | 147.98 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 3120 |
| Same as above plus superheater percentage | 3120 |
| Same as above but substitute firebox area for grate area | 0 |
| Power L1 | 0 |
| Power MT | 0 |
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