Philadelphia, Germantown, and Norristown 4-4-0 "American" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class unknown (Locobase 2540)

Designed by the Philadelphia, Germantown, and Norristown's Henry Campbell. White (1968) notes that this engine, "a giant for the times", could pull a 450-ton train on level ground at 15 mph. Although it was the first to have the "American" wheel arrangement, its suspension was far too rigid and it was rough on the track. It later went to the Long Island Railroad.

Principal Dimensions by Steve Llanso of Sweat House Media
Locobase ID2540
RailroadPhiladelphia, Germantown, and Norristown
Number in Class1
Road Numbers
Number Built1
BuilderJames Brooks
Valve GearEastwick
Locomotive Length and Weight
Driver Wheelbase (ft / m)
Engine Wheelbase (ft / m)16.45 / 5.01
Ratio of driving wheelbase to overall engine wheebase
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)8000 / 3629
Weight on Drivers (lbs / kg)16,000 / 7257
Engine Weight (lbs / kg)
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)13 / 6.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)54 / 1372
Boiler Pressure (psi / kPa)90 / 6.20
High Pressure Cylinders (dia x stroke) (in / mm)14" x 15.75" / 356x400
Tractive Effort (lbs / kg)4373 / 1983.56
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.66
Heating Ability
Firebox Area (sq ft / m2)
Grate Area (sq ft / m2)12 / 1.12
Evaporative Heating Surface (sq ft / m2)723 / 67.19
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)723 / 67.19
Evaporative Heating Surface/Cylinder Volume257.65
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1080
Same as above plus superheater percentage1080
Same as above but substitute firebox area for grate area
Power L1
Power MT

All material Copyright ©
Wes Barris