Many were eventually superheated and fitted with Walschaerts outside valve gear.
See Locobase 5313 (Chicago & Alton), 4407 (Southern Pacific), and 4408 (Union Pacific) for examples of the HCS Pacific design.
| Specifications | |
|---|---|
| Class | Light Pacific P-141 |
| Locobase ID | 5341 |
| Railroad | Harriman Lines |
| Whyte | 4-6-2 |
| Road Numbers | |
| Gauge | Std |
| Builder | Burnham, Williams & Co |
| Year | 1905 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase | 13.33' |
| Engine Wheelbase | 33.33' |
| Ratio of driving wheelbase to overall engine wheebase | 0.40 |
| Overall Wheelbase (engine & tender) | 63.87' |
| Axle Loading (Maximum Weight per Axle) | |
| Weight on Drivers | 141000 lbs |
| Engine Weight | 222000 lbs |
| Tender Light Weight | 162200 lbs |
| Total Engine and Tender Weight | 384200 lbs |
| Tender Water Capacity | |
| Tender Fuel Capacity (oil/coal) | |
| Minimum weight per yard of rail on which locomotive could run | 78.33 lb rail |
| Geometry Relating to Tractive Effort | |
| Driver Diameter | 77" |
| Boiler Pressure | 200 psi |
| Cylinders (dia x stroke) | 22" x 28" |
| Tractive Effort | 29920 lbs |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.71 |
| Heating Ability | |
| Firebox Area | 174 sq. ft |
| Grate Area | 49.50 sq. ft |
| Evaporative Heating Surface | 3048 |
| Superheating Surface | |
| Combined Heating Surface | 3048 |
| Evaporative Heating Surface/Cylinder Volume | 247.42 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 9900 |
| Same as above plus superheater percentage | 9900 |
| Same as above but substitute firebox area for grate area | 34800 |
| Power L1 | 8163.09 |
| Power MT | 382.90 |
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