Clearly experimental (being built by Alco practically guaranteed non-acceptance on the Pennsy) as a halfway measure between the 4-4-2s they already built in quantity and the 4-6-2 being adopted by many other roads. (A 1912 photo of 7453 in Fort Wayne -- http://prrsteam.pennsyrr.com/images/prr7453.jpg -- shows a wagon-top boiler also uncharacteristic of Pennsy engines.
Berkey notes that one was still on the roster in 1924, but both were gone by the end of 1929.
| Specifications | |
|---|---|
| Class | J28 |
| Locobase ID | 5347 |
| Railroad | Pennsylvania (PRR) |
| Whyte | 2-6-2 |
| Road Numbers | 2761, 7453 |
| Gauge | Std |
| Builder | Alco-Schenectady |
| Year | 1905 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase | 14.83' |
| Engine Wheelbase | 34.25' |
| Ratio of driving wheelbase to overall engine wheebase | 0.43 |
| Overall Wheelbase (engine & tender) | 64.85' |
| Axle Loading (Maximum Weight per Axle) | |
| Weight on Drivers | 166800 lbs |
| Engine Weight | 234500 lbs |
| Tender Light Weight | 143000 lbs |
| Total Engine and Tender Weight | 377500 lbs |
| Tender Water Capacity | 7000 gals |
| Tender Fuel Capacity (oil/coal) | 13.5 tons |
| Minimum weight per yard of rail on which locomotive could run | 92.67 lb rail |
| Geometry Relating to Tractive Effort | |
| Driver Diameter | 80" |
| Boiler Pressure | 200 psi |
| Cylinders (dia x stroke) | 21.5" x 28" |
| Tractive Effort | 27504 lbs |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 6.06 |
| Heating Ability | |
| Firebox Area | 198 sq. ft |
| Grate Area | 55 sq. ft |
| Evaporative Heating Surface | 3976 |
| Superheating Surface | |
| Combined Heating Surface | 3976 |
| Evaporative Heating Surface/Cylinder Volume | 337.94 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 11000 |
| Same as above plus superheater percentage | 11000 |
| Same as above but substitute firebox area for grate area | 39600 |
| Power L1 | 11255.49 |
| Power MT | 446.30 |
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