Ko'olau Railway 0-4-2 Locomotives of the USA

Class Details by Steve Llanso of Sweat House Media

Class 2 (Locobase 14751)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Vol 63, p 227. Works number was 54026 in November 1920.

Saddle tanks on plantations were by no means an unusual sight and this Hawaiian planter was satisfied enough with Baldwin's 1907 six-coupled radial tank (Locobase 13156) to order a second engine, but abbreviated the design by eliminating an axle.

Specifications by Steve Llanso of Sweat House Media
Locobase ID14751
RailroadKo'olau Railway
Number in Class1
Road Numbers2
Number Built1
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase 3.75'
Engine Wheelbase 9.58'
Ratio of driving wheelbase to overall engine wheebase 0.39
Overall Wheelbase (engine & tender) 9.58'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers20000 lbs
Engine Weight26000 lbs
Tender Light Weight
Total Engine and Tender Weight26000 lbs
Tender Water Capacity300 gals
Tender Fuel Capacity (oil/coal)150 gals
Minimum weight of rail (calculated)17 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter28"
Boiler Pressure160 psi
Cylinders (dia x stroke)8" x 12"
Tractive Effort3730 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.36
Heating Ability
Firebox Area25 sq. ft
Grate Area6 sq. ft
Evaporative Heating Surface175 sq. ft
Superheating Surface
Combined Heating Surface175 sq. ft
Evaporative Heating Surface/Cylinder Volume250.67
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation960
Same as above plus superheater percentage960
Same as above but substitute firebox area for grate area4000
Power L13209
Power MT707.46

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