Philadelphia & Reading 0-12-0 Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class Pennsylvania (Locobase 5959)

Data from Gustav Reder (1974), pl. 177.

Built as a helper by James Milholland to handle trains up the Falls Grade which traversed the ridge between the Schuykill and Delaware Rivers near Philadelphia. A great hulking beast with a camelback-style cab perched on the boiler, this first-of-a-kind twelve-coupled had no tender and no bunkerage. The huge, wide firebox was stoked at the beginning of the slog up the grade and that sufficed.

The lightly built freight cars of the time couldn't handle the high drawbar pull and the locomotive was converted to a more orthodox banker in 1870.

Specifications by Steve Llanso of Sweat House Media
Locobase ID5959
RailroadPhiladelphia & Reading
Number in Class1
Road Numbers
Number Built1
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft)19.58
Engine Wheelbase (ft)19.58
Ratio of driving wheelbase to overall engine wheebase1
Overall Wheelbase (engine & tender) (ft)
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)110,250
Engine Weight (lbs)110,250
Tender Loaded Weight (lbs)
Total Engine and Tender Weight (lbs)110,250
Tender Water Capacity (gals)
Tender Fuel Capacity (oil/coal) (gals/tons)
Minimum weight of rail (calculated) (lb/yd)31
Geometry Relating to Tractive Effort
Driver Diameter (in)43
Boiler Pressure (psi)100
High Pressure Cylinders (dia x stroke) (in)20" x 26"
Tractive Effort (lbs)20,558
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.36
Heating Ability
Firebox Area (sq ft)
Grate Area (sq ft)31.20
Evaporative Heating Surface (sq ft)1399
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)1399
Evaporative Heating Surface/Cylinder Volume147.98
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation3120
Same as above plus superheater percentage3120
Same as above but substitute firebox area for grate area
Power L1
Power MT