Unlike most Pennsy engines, which had 12" piston valves, these imports sported 14"-diameter piston valves. EHS, SHS dimensions slightly smaller, but BP higher, resulting in higher TE. J-1s (and T-1s) were considered very successful engines.
| Specifications | |
|---|---|
| Class | J1 |
| Locobase ID | 98 |
| Railroad | Pennsylvania (PRR) |
| Whyte | 2-10-4 |
| Road Numbers | 6150+, 6401+ |
| Gauge | Std |
| Builder | Juniata |
| Year | 1942 |
| Valve Gear | Baker |
| Locomotive Length and Weight | |
| Driver Wheelbase | 24.33' |
| Engine Wheelbase | 49.25' |
| Ratio of driving wheelbase to overall engine wheebase | 0.49 |
| Overall Wheelbase (engine & tender) | 104.04' |
| Axle Loading (Maximum Weight per Axle) | 76800 lbs |
| Weight on Drivers | 377800 lbs |
| Engine Weight | 572640 lbs |
| Tender Light Weight | 411500 lbs |
| Total Engine and Tender Weight | 984140 lbs |
| Tender Water Capacity | 21000 gals |
| Tender Fuel Capacity (oil/coal) | 29.9 tons |
| Minimum weight per yard of rail on which locomotive could run | 126 lb rail |
| Geometry Relating to Tractive Effort | |
| Driver Diameter | 69" |
| Boiler Pressure | 275.60 psi |
| Cylinders (dia x stroke) | 29" x 34" |
| Tractive Effort | 97079 lbs |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.89 |
| Heating Ability | |
| Firebox Area | 575 sq. ft |
| Grate Area | 121.70 sq. ft |
| Evaporative Heating Surface | 6568 |
| Superheating Surface | 2930 |
| Combined Heating Surface | 9498 |
| Evaporative Heating Surface/Cylinder Volume | 252.69 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 33541 |
| Same as above plus superheater percentage | 43603 |
| Same as above but substitute firebox area for grate area | 206011 |
| Power L1 | 43668 |
| Power MT | 1274.10 |
| This page last modified: . | [Contact] | All material © 1999-2008 SteamLocomotive.com |