Ko'olau Railway 0-4-2 Locomotives in 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
Class2
Locobase ID14,751
RailroadKo'olau Railway
CountryUSA
Whyte0-4-2ST
Number in Class1
Road Numbers2
Gauge3'
Number Built1
BuilderBaldwin
Year1920
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 3.75 / 1.14
Engine Wheelbase (ft / m) 9.58 / 2.92
Ratio of driving wheelbase to overall engine wheebase 0.39
Overall Wheelbase (engine & tender) (ft / m) 9.58 / 2.92
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)20,000 / 9072
Engine Weight (lbs / kg)26,000 / 11,793
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)26,000
Tender Water Capacity (gals / ML)300 / 1.14
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)150 / 0.60
Minimum weight of rail (calculated) (lb/yd / kg/m)17 / 8.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)28 / 711
Boiler Pressure (psi / kPa)160 / 11
High Pressure Cylinders (dia x stroke) (in / mm)8" x 12" / 203x305
Tractive Effort (lbs / kg)3730 / 1691.90
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.36
Heating Ability
Firebox Area (sq ft / m2)25 / 2.32
Grate Area (sq ft / m2)6 / 0.56
Evaporative Heating Surface (sq ft / m2)175 / 16.26
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)175 / 16.26
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