Five 3 1/2" arch tubes
EW King, Jr. (in Drury, 1993) on the 2-6-6-4 design, of which these P&WVs were the first examples: "These locomotives were designed back to front. First consideration was given to providing a firebox-boiler combination capable of the required horsepower output -- a deep Belpaire firebox of liberal grate area located entirely behind the driving wheels." The low driver diameter didn't bother the P&WV because as a coal road, it didn't dabble in high speeds anyway.
J-1s had a tender-mounted booster engine that proved to be a maintenance headache; J-2s didn't have the booster. Firebox heating surface included 150 sq ft of the combustion chamber and 49 sq ft of "firebrick" tubes.
| Specifications | |
|---|---|
| Class | J-1/J-2 |
| Locobase ID | 301 |
| Railroad | Pittsburgh & West Virginia |
| Whyte | 2-6-6-4 |
| Road Numbers | 1100-1106 |
| Gauge | Std |
| Builder | Baldwin |
| Year | 1934 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase | 11' |
| Engine Wheelbase | 55.66' |
| Ratio of driving wheelbase to overall engine wheebase | 0.20 |
| Overall Wheelbase (engine & tender) | 98.33' |
| Axle Loading (Maximum Weight per Axle) | |
| Weight on Drivers | 397300 lbs |
| Engine Weight | 528040 lbs |
| Tender Light Weight | 377600 lbs |
| Total Engine and Tender Weight | 905640 lbs |
| Tender Water Capacity | 20000 gals |
| Tender Fuel Capacity (oil/coal) | 25 tons |
| Minimum weight per yard of rail on which locomotive could run | 110.36 lb rail |
| Geometry Relating to Tractive Effort | |
| Driver Diameter | 63" |
| Boiler Pressure | 225 psi |
| Cylinders (dia x stroke) | 23" x 32" (4) |
| Tractive Effort | 102777 lbs |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.87 |
| Heating Ability | |
| Firebox Area | 499 sq. ft |
| Grate Area | 102.30 sq. ft |
| Evaporative Heating Surface | 5914 |
| Superheating Surface | 1873 |
| Combined Heating Surface | 7787 |
| Evaporative Heating Surface/Cylinder Volume | 192.16 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 23017.50 |
| Same as above plus superheater percentage | 28553.88 |
| Same as above but substitute firebox area for grate area | 139280.40 |
| Power L1 | 19395.30 |
| Power MT | 645.75 |
| This page last modified: . | [Contact] | All material © 1999-2008 SteamLocomotive.com |