One-of-a-kind articulated for the Pennsy, who preferred to be the non-Standard Railroad of the World when it came to that kind of engine. Like other Pennsylvania engines, too, it burned its fuel in a Belpaire firebox. (See Locobase 32 for a comment on the unique design of Pennsy's Belpaire firebox.) and admitted steam through 12" (305 mm) piston valves on all cylinders.
The HC-1's boiler had 19-ft-long tubes and a combustion chamber measuring 12' 5 1/2" (3.797 m); the total length of the boiler came to 53' 9 1/2", possibly the longest ever mounted, of which 26 ft included the crown sheet. So long were the boiler and crown sheet that special pipes were led up out of the wrapper sheet at the front of the combustion chamber and continued back to gauge cocks to ensure that the crew would know the proper water level.
The oddness of the layout extended to the tube and flue combination. The superheater had 3 vertical headers and 2 superheater steam headers, each unit, says the R&LE, "...being connected to from two to five units, each unit leading and returning to or from one of the larger flues."
This engine is reported to have run well as a pusher in Allegheny Mountain service until it was retired in 1929.
|Specifications by Steve Llanso of Sweat House Media|
|Number in Class||1|
|Locomotive Length and Weight|
|Ratio of driving wheelbase to overall engine wheebase||0.31|
|Overall Wheelbase (engine & tender)||97.31'|
|Axle Loading (Maximum Weight per Axle)|
|Weight on Drivers||540000 lbs|
|Engine Weight||575000 lbs|
|Tender Light Weight||219000 lbs|
|Total Engine and Tender Weight||794000 lbs|
|Tender Water Capacity||12900 gals|
|Tender Fuel Capacity (oil/coal)||13.9 tons|
|Minimum weight of rail (calculated)||113 lb/yard|
|Geometry Relating to Tractive Effort|
|Boiler Pressure||205 psi|
|Cylinders (dia x stroke)||30.5" x 32"|
|Tractive Effort||167325 lbs|
|Factor of Adhesion (Weight on Drivers/Tractive Effort)||3.23|
|Firebox Area||531 sq. ft|
|Grate Area||112 sq. ft|
|Evaporative Heating Surface||6656 sq. ft|
|Superheating Surface||3136 sq. ft|
|Combined Heating Surface||9792 sq. ft|
|Evaporative Heating Surface/Cylinder Volume||122.99|
|Computations Relating to Power Output (More Information)|
|Robert LeMassena's Power Computation||22960|
|Same as above plus superheater percentage||30307|
|Same as above but substitute firebox area for grate area||143689|