Arcata & Mad River 2-4-2 "Columbian" Locomotives in the USA

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Class Details by Steve Llanso of Sweat House Media

Class Northern (Locobase 16282)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 23, p. 182. (Thanks to Chris Hohl for his 26 May 2017 email and worksheet providing an estimated firebox heating surface area.) Works number was 27073 in December 1905.

Specifications by Steve Llanso of Sweat House Media
ClassNorthern
Locobase ID16,282
RailroadArcata & Mad River
CountryUSA
Whyte2-4-2
Number in Class1
Road Numbers6
Gauge3' 9.25
Number Built1
BuilderBurnham, Williams & Co
Year1900
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 6.25 / 1.90
Engine Wheelbase (ft / m)17.33 / 5.28
Ratio of driving wheelbase to overall engine wheebase 0.36
Overall Wheelbase (engine & tender) (ft / m)17.33 / 5.28
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)31,000 / 14,061
Engine Weight (lbs / kg)400,000 / 181,437
Tender Loaded Weight (lbs / kg)20,000 / 9072
Total Engine and Tender Weight (lbs / kg)420,000 / 190,509
Tender Water Capacity (gals / ML)1000 / 3.79
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)26 / 13
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)37 / 940
Boiler Pressure (psi / kPa)160 / 11
High Pressure Cylinders (dia x stroke) (in / mm)11" x 16" / 279x406
Tractive Effort (lbs / kg)7116 / 3227.77
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.36
Heating Ability
Firebox Area (sq ft / m2)53.90 / 5.01
Grate Area (sq ft / m2) 8.50 / 0.79
Evaporative Heating Surface (sq ft / m2)386 / 35.86
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)386 / 35.86
Evaporative Heating Surface/Cylinder Volume219.33
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1360
Same as above plus superheater percentage1360
Same as above but substitute firebox area for grate area8624
Power L13675
Power MT522.71