Coharie Lumber Company 2-4-2 "Columbian" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 1 (Locobase 13048)

Data from DeGolyer, Volume 29, p. 305. Works number was 31122 in June 1907.

Coharie Lumber's railroad offered some challenges to even the smallest logging engine. This locomotive used a boiler similar to some 6-wheel saddle tanks, but rolled on 4 axles instead of 3 because of the 30-lb/yard (15-kg/metre) rail. It was required to haul 125 short tons of train up a grade of 79 ft/mile (1.5%).

The 1 was later sold to the Ford Lumber & Supply Company.

Principal Dimensions by Steve Llanso of Sweat House Media
Locobase ID13048
RailroadCoharie Lumber Company
Number in Class1
Road Numbers1
Number Built1
BuilderBurnham, Williams & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)5 / 1.52
Engine Wheelbase (ft / m)15.92 / 4.85
Ratio of driving wheelbase to overall engine wheebase 0.31
Overall Wheelbase (engine & tender) (ft / m)15.92 / 4.85
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)25,000 / 11,340
Engine Weight (lbs / kg)36,000 / 16,329
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)36,000
Tender Water Capacity (gals / ML)400 / 1.52
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)21 / 10.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)36 / 914
Boiler Pressure (psi / kPa)170 / 11.70
High Pressure Cylinders (dia x stroke) (in / mm)10" x 14" / 254x356
Tractive Effort (lbs / kg)5619 / 2548.74
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.45
Heating Ability
Firebox Area (sq ft / m2)37 / 3.44
Grate Area (sq ft / m2) 7.80 / 0.72
Evaporative Heating Surface (sq ft / m2)257 / 23.88
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)257 / 23.88
Evaporative Heating Surface/Cylinder Volume201.94
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1326
Same as above plus superheater percentage1326
Same as above but substitute firebox area for grate area6290
Power L13543
Power MT624.88

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Wes Barris