Deering Southwestern 2-4-2 "Columbian" Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 1 (Locobase 13891)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 41, p. 3. Works number was 38055 in July 1912.

The Cotton Belt website --, accessed 29 May 2007 -- says the D&SW "...originated at Caruthersville, Missouri (on the Mississippi, and extended almost due west to Deering, where it veered southwest to Hornersville and connected with the Cotton Belt." The section from the lumber mill at Deering to Hickory was completed in 1903, the remainder took the next eight years.

The D&SW was owned by Wisconsin Lumber, which only goes to show that corporate names derived from geographic references cannot be relied upon. In the specs, the D&SW is shown to have rails weighing between 35 and 55 lb/yard (17.5-27.5 kg/metre), but a relatively gentle 10 degrees for the tightest curve radius. Still, each truck was given the leeway to swing 4 inches (102 mm) to either side of center.

Specifications by Steve Llanso of Sweat House Media
Locobase ID13,891
RailroadDeering Southwestern
Number in Class1
Road Numbers1
Number Built1
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft) 5.60
Engine Wheelbase (ft)17.50
Ratio of driving wheelbase to overall engine wheebase 0.32
Overall Wheelbase (engine & tender) (ft)35.75
Axle Loading (Maximum Weight per Axle) (lbs)
Weight on Drivers (lbs)34,000
Engine Weight (lbs)50,000
Tender Loaded Weight (lbs)35,000
Total Engine and Tender Weight (lbs)85,000
Tender Water Capacity (gals)1500
Tender Fuel Capacity (oil/coal) (gals/tons)3
Minimum weight of rail (calculated) (lb/yd)28
Geometry Relating to Tractive Effort
Driver Diameter (in)36
Boiler Pressure (psi)160
High Pressure Cylinders (dia x stroke) (in)11" x 16"
Tractive Effort (lbs)7314
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.65
Heating Ability
Firebox Area (sq ft)43
Grate Area (sq ft) 8.70
Evaporative Heating Surface (sq ft)431
Superheating Surface (sq ft)
Combined Heating Surface (sq ft)431
Evaporative Heating Surface/Cylinder Volume244.90
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1392
Same as above plus superheater percentage1392
Same as above but substitute firebox area for grate area6880
Power L13524
Power MT457.00


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