Sessions Foundry Company 2-4-2 "Columbian" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 3 (Locobase 14327)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 53, pp. 109. Works number was 44347 in October 1916.

The specifications advise that the locomotive was "to handle two big standard cars, total weight of cars and lading 160 to 170 tons" for its Bristol, Connecticut owner. The Sessions Foundry was described in 1909 as the largest and best-equipped foundry east of Chicago.

Specifications by Steve Llanso of Sweat House Media
Locobase ID14,327
RailroadSessions Foundry Company
Number in Class1
Road Numbers3
Number Built1
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft)7
Engine Wheelbase (ft)21.42
Ratio of driving wheelbase to overall engine wheebase 0.33
Overall Wheelbase (engine & tender) (ft)21.42
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)62,500
Engine Weight (lbs)86,500
Tender Loaded Weight (lbs)
Total Engine and Tender Weight (lbs)86,500
Tender Water Capacity (gals)1000
Tender Fuel Capacity (oil/coal) (gals/tons)
Minimum weight of rail (calculated) (lb/yd)52
Geometry Relating to Tractive Effort
Driver Diameter (in)44
Boiler Pressure (psi)180
High Pressure Cylinders (dia x stroke) (in)14" x 22"
Tractive Effort (lbs)14,994
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.17
Heating Ability
Firebox Area (sq ft)60
Grate Area (sq ft)14.20
Evaporative Heating Surface (sq ft)889
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)889
Evaporative Heating Surface/Cylinder Volume226.80
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2556
Same as above plus superheater percentage2556
Same as above but substitute firebox area for grate area10,800
Power L14004
Power MT282.47

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