Wailuku 0-6-2 Locomotives in the USA

Class Details by Steve Llanso of Sweat House Media

Class George H Robertson (Locobase 13158)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Vol 54, p. 412. Works number was 42166 in June 1915.

The Wailuku plantation wasn't profligate in its spending on locomotives. It waited eight years after delivery of its second locomotive (Locobase 13157) before it ordered this one. Although about the same size as the Prairie tank, the George H Robertson gave up the front axle and used a boiler with smaller-diameter tubes. Its water and oil-fuel tanks were larger, but it weighed less than the P C Jones. A 1922 photograph shows the cabbage stack with spark arrester.

At the end of that year, the Wailuke Company owned 3,395 acres of cane cultivation, 142 uncultivated acres, and 16,499 acres of forest and pasture land owned in fee.

Principal Dimensions by Steve Llanso of Sweat House Media
ClassGeorge H Robertson
Locobase ID13,158
Number in Class1
Road Numbers4
Number Built1
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 7.50 / 2.29
Engine Wheelbase (ft / m)14.58 / 4.44
Ratio of driving wheelbase to overall engine wheebase 0.51
Overall Wheelbase (engine & tender) (ft / m)14.58 / 4.44
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)34,000 / 15,422
Engine Weight (lbs / kg)39,000 / 17,690
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)39,000
Tender Water Capacity (gals / ML)1000 / 3.79
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)300 / 1.10
Minimum weight of rail (calculated) (lb/yd / kg/m)19 / 9.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)33 / 838
Boiler Pressure (psi / kPa)160 / 11
High Pressure Cylinders (dia x stroke) (in / mm)11" x 16" / 279x406
Tractive Effort (lbs / kg)7979 / 3619.22
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.26
Heating Ability
Firebox Area (sq ft / m2)40 / 3.72
Grate Area (sq ft / m2) 8.90 / 0.83
Evaporative Heating Surface (sq ft / m2)370 / 34.39
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)370 / 34.39
Evaporative Heating Surface/Cylinder Volume210.24
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1424
Same as above plus superheater percentage1424
Same as above but substitute firebox area for grate area6400
Power L12850
Power MT554.40

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