Ola'a Sugar Company 0-4-2 Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class 30 (Locobase 15456)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Vol 79, pp. 352. See also Locobase 13766 for more information about the OSC. Works number was 61453 in August 1930.

This Big Island plantation had bought Moguls (Locobase 13766) for more than a decade, the last arriving in 1921. This little oil-burning plantation saddle tank joined that set nine years later. It used the Sheedy-Garrick oil burner, which was inserted through a tube set in the front water leg. (A 1905 test showed that the Sheedy-Garrick would burn molasses efficiently; Locobase does not know if that fuel was burned by the OSC.) The 30's stack was the bootleg type with a netting lid over the top.

The engine operated for the OSC until it was scrapped in 1950.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID15456
RailroadOla'a Sugar Company
Number in Class1
Road Numbers30
Number Built1
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)5 / 1.52
Engine Wheelbase (ft / m)11 / 3.35
Ratio of driving wheelbase to overall engine wheelbase 0.45
Overall Wheelbase (engine & tender) (ft / m)11 / 3.35
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)26,000 / 11,793
Engine Weight (lbs / kg)33,500 / 15,195
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)33,500
Tender Water Capacity (gals / ML)500 / 1.89
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)225 / 852
Minimum weight of rail (calculated) (lb/yd / kg/m)22 / 11
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)8.5" x 12" / 216x305
Tractive Effort (lbs / kg)4211 / 1910.08
Factor of Adhesion (Weight on Drivers/Tractive Effort) 6.17
Heating Ability
Tubes (number - dia) (in / mm)57 - 1.5" / 38
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m) 7.82 / 2.38
Firebox Area (sq ft / m2)26 / 2.42
Grate Area (sq ft / m2) 7.68 / 0.71
Evaporative Heating Surface (sq ft / m2)200 / 18.59
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)200 / 18.59
Evaporative Heating Surface/Cylinder Volume253.16
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1229
Same as above plus superheater percentage1229
Same as above but substitute firebox area for grate area4160
Power L13119
Power MT528.94

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