John Souther 4-4-0 "American" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 15"" cylinders (Locobase 8812)

Data from Zerah Colburn, The Locomotive Engine (1851). Boiler pressure is an estimate.

Souther left Hinkley's works in 1848 (just as it was being renamed Boston Locomotive Works) to start his own shop in South Boston. It was later (1854) incorporated as the Globe Works; this was around the same time that Souther also managed the Tredegar Works in Richmond. The Globe Works burned down in a fire in 1860.

In addition to boiler details, Colburn also gave the following data:

Size of steam ports 9 7/8 x 1"

Size of exhaust ports 9 7/8 x 1 1/4".

Specifications by Steve Llanso of Sweat House Media
Class15"" cylinders
Locobase ID8812
RailroadJohn Souther
Number in Class
Road Numbers
Number Built
BuilderJohn Souther
Valve Gear
Locomotive Length and Weight
Driver Wheelbase
Engine Wheelbase
Ratio of driving wheelbase to overall engine wheebase
Overall Wheelbase (engine & tender)
Axle Loading (Maximum Weight per Axle)
Weight on Drivers
Engine Weight
Tender Light Weight
Total Engine and Tender Weight
Tender Water Capacity
Tender Fuel Capacity (oil/coal)
Minimum weight of rail (calculated)0
Geometry Relating to Tractive Effort
Driver Diameter66"
Boiler Pressure80 psi
Cylinders (dia x stroke)15" x 20"
Tractive Effort4636 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort)
Heating Ability
Firebox Area60.80 sq. ft
Grate Area 9.63 sq. ft
Evaporative Heating Surface710 sq. ft
Superheating Surface
Combined Heating Surface710 sq. ft
Evaporative Heating Surface/Cylinder Volume173.57
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation770
Same as above plus superheater percentage770
Same as above but substitute firebox area for grate area4864
Power L12181
Power MT

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