Kahului Railroad 2-4-2 "Columbian" Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class Kinau (Locobase 11814)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Vol 11, p. 215. Works number was 6782 in May 1883.

This tank was built to a specification of the Hawaiian Railroad that included the ability to run on 20 lb/yard rail, negotiate 82-ft curves, and run equally easily in both directions. It was named Kauk and given the number 2. Apparently, the HR preferred the more typical 0-4-2T, because it traded this engine to the Kahului on Maui for an older Baldwin tank.

The KR clearly was pleased with the trade as they operated the little double-ender (with 8-wheel tender) for more than 40 years before scrapping it in 1926.

Principal Dimensions by Steve Llanso of Sweat House Media
Locobase ID11814
RailroadKahului Railroad
CountryHawaiian Kingdom
Number in Class1
Road Numbers2
Number Built1
BuilderBurnham, Parry, Williams & Co
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)4 / 1.22
Engine Wheelbase (ft / m)15 / 4.57
Ratio of driving wheelbase to overall engine wheebase 0.27
Overall Wheelbase (engine & tender) (ft / m)14.33 / 4.37
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)
Engine Weight (lbs / kg)
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)750 / 2.84
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)36 / 914
Boiler Pressure (psi / kPa)130 / 9
High Pressure Cylinders (dia x stroke) (in / mm)9" x 14" / 229x356
Tractive Effort (lbs / kg)3481 / 1578.96
Factor of Adhesion (Weight on Drivers/Tractive Effort)
Heating Ability
Firebox Area (sq ft / m2)22.25 / 2.07
Grate Area (sq ft / m2) 6.70 / 0.62
Evaporative Heating Surface (sq ft / m2)192 / 17.84
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)192 / 17.84
Evaporative Heating Surface/Cylinder Volume186.26
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation871
Same as above plus superheater percentage871
Same as above but substitute firebox area for grate area2893
Power L12295
Power MT

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