Philadelphia, Germantown, and Norristown 4-4-0 "American" Type Locomotives

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.

Specifications

Class

Locobase ID 2540

Railroad Philadelphia, Germantown, and Norristown

Whyte 4-4-0

Road Numbers

Gauge Std

Builder James Brooks

Year 1837

Valve Gear Eastwick

Locomotive Length and Weight

Driver Wheelbase

Engine Wheelbase 16.45'

Ratio of driving wheelbase to overall engine wheebase

Overall Wheelbase (engine & tender)

Axle Loading (Maximum Weight per Axle) 8000 lbs

Weight on Drivers 16000 lbs

Engine Weight

Tender Light Weight

Total Engine and Tender Weight 0

Tender Water Capacity

Tender Fuel Capacity (oil/coal)

Minimum weight per yard of rail on which locomotive could run 13 lb rail

Geometry Relating to Tractive Effort

Driver Diameter 54"

Boiler Pressure 90 psi

Cylinders (dia x stroke) 14" x 15.75"

Tractive Effort 4373 lbs

Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.66

Heating Ability

Firebox Area

Grate Area 12 sq. ft

Evaporative Heating Surface 723

Superheating Surface

Combined Heating Surface 723

Evaporative Heating Surface/Cylinder Volume 257.65

Computations Relating to Power Output (More Information)

Robert LeMassena's Power Computation 1080

Same as above plus superheater percentage 1080

Same as above but substitute firebox area for grate area 0

Power L1 0

Power MT 0

Specifications
Class
Locobase ID	2540
Railroad	Philadelphia, Germantown, and Norristown
Whyte	4-4-0
Road Numbers
Gauge	Std
Builder	James Brooks
Year	1837
Valve Gear	Eastwick
	Locomotive Length and Weight
Driver Wheelbase
Engine Wheelbase	16.45'
Ratio of driving wheelbase to overall engine wheebase
Overall Wheelbase (engine & tender)
Axle Loading (Maximum Weight per Axle)	8000 lbs
Weight on Drivers	16000 lbs
Engine Weight
Tender Light Weight
Total Engine and Tender Weight	0
Tender Water Capacity
Tender Fuel Capacity (oil/coal)
Minimum weight per yard of rail on which locomotive could run	13 lb rail
	Geometry Relating to Tractive Effort
Driver Diameter	54"
Boiler Pressure	90 psi
Cylinders (dia x stroke)	14" x 15.75"
Tractive Effort	4373 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort)	3.66
	Heating Ability
Firebox Area
Grate Area	12 sq. ft
Evaporative Heating Surface	723
Superheating Surface
Combined Heating Surface	723
Evaporative Heating Surface/Cylinder Volume	257.65
	Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation	1080
Same as above plus superheater percentage	1080
Same as above but substitute firebox area for grate area	0
Power L1	0
Power MT	0

Credits

Introduction and specifications provided by Steve Llanso of Sweat House Media.