Koloa Sugar Company 0-6-0 "Switcher" Locomotives in the USA

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Class Details by Steve Llanso of Sweat House Media

Class Mahaulepu (Locobase 14753)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Vol 63, p 231. See also Benjamin Levy, "Old Sugar Mill of Koloa", Netional Register of Historic Places Nomination Form (submitted August 1978) at http://pdfhost.focus.nps.gov/docs/NHLS/Text/66000296.pdf . Works number was 52875 in January 1920.

In the nomination form, the applicants noted that this Kauai-island mill was the oldest commercially successful sugar plantation in the Hawaiian Islands. It took shape in 1835 when three men formed Ladd & Company and negotiated a lease of 980 acres (396 ha) of land on Kauai from King Kamehameha III.

Although responsible for the first three mills on the property (including the 1841 mill that is the focus of the registry nomination), Ladd & Company gave up its interest in 1845. Dr R W Wood's efforts after 1848 led to continuing success and profitability for over a century.

More than seventy years later came this little coal-burning tank, which was fitted with a Rushton Improved spark-arresting stack.

Specifications by Steve Llanso of Sweat House Media
ClassMahaulepu
Locobase ID14,753
RailroadKoloa Sugar Company
CountryUSA
Whyte0-6-0T
Number in Class1
Road Numbers3
Gauge2'6""
Number Built1
BuilderBurnham, Williams & Co
Year1920
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 5.67 / 1.73
Engine Wheelbase (ft / m) 5.67 / 1.73
Ratio of driving wheelbase to overall engine wheebase1
Overall Wheelbase (engine & tender) (ft / m) 5.67 / 1.73
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)28,000 / 12,701
Engine Weight (lbs / kg)28,000 / 12,701
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)28,000
Tender Water Capacity (gals / ML)400 / 1.52
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT) 0.40 / 0.40
Minimum weight of rail (calculated) (lb/yd / kg/m)16 / 8
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)26 / 660
Boiler Pressure (psi / kPa)165 / 11.40
High Pressure Cylinders (dia x stroke) (in / mm)9" x 12" / 229x305
Tractive Effort (lbs / kg)5243 / 2378.19
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.34
Heating Ability
Firebox Area (sq ft / m2)28 / 2.60
Grate Area (sq ft / m2) 5.70 / 0.53
Evaporative Heating Surface (sq ft / m2)295 / 27.41
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)295 / 27.41
Evaporative Heating Surface/Cylinder Volume333.87
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation941
Same as above plus superheater percentage941
Same as above but substitute firebox area for grate area4620
Power L13520
Power MT831.46