Warrenton 2-4-2 "Columbian" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 4 (Locobase 15211)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Vol 71, pp. 198+. Works number was 55467 in May 1922.

This engine had an even more unusual arrangement for an American locomotive than the 2-4-2T tank engine used by many logging companies. Tralling a tender, serving a mixed-traffic service, and arriving on the railroad so late in the steam era combine to make this a rare beast indeed. A photograph showing the 4 with its bi-directional suggests that it was really an 0-6-0 that the WRR wanted to be bi-directional.

Later in its career, the 4 served the Atlantic & Carolina, the Oats Lumber Company, and finally the Beaufort & Morehead.

Principal Dimensions by Steve Llanso of Sweat House Media
Locobase ID15211
Number in Class1
Road Numbers4
Number Built1
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m) 7.50 / 2.29
Engine Wheelbase (ft / m)23.50 / 7.16
Ratio of driving wheelbase to overall engine wheebase 0.32
Overall Wheelbase (engine & tender) (ft / m)45.81 / 13.96
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)65,000 / 29,484
Engine Weight (lbs / kg)87,000 / 39,463
Tender Loaded Weight (lbs / kg)65,000 / 29,484
Total Engine and Tender Weight (lbs / kg)152,000 / 68,947
Tender Water Capacity (gals / ML)3000 / 11.36
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)6 / 5.50
Minimum weight of rail (calculated) (lb/yd / kg/m)54 / 27
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)42 / 1067
Boiler Pressure (psi / kPa)160 / 11
High Pressure Cylinders (dia x stroke) (in / mm)15" x 22" / 381x559
Tractive Effort (lbs / kg)16,029 / 7270.64
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.06
Heating Ability
Firebox Area (sq ft / m2)70 / 6.50
Grate Area (sq ft / m2)15.90 / 1.48
Evaporative Heating Surface (sq ft / m2)1047 / 97.27
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1047 / 97.27
Evaporative Heating Surface/Cylinder Volume232.68
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2544
Same as above plus superheater percentage2544
Same as above but substitute firebox area for grate area11,200
Power L13477
Power MT235.86

All material Copyright © SteamLocomotive.com
Wes Barris