Locobase doesn't know enough Hawaiian history to comment on the significance of changing the name of the first locomotive from Hoaeae to Waikele soon after its arrival on Oahu. Waiawa didn't undergo a similar change.
Both plantation radial tank rode on the OSC's 30 lb/yard (15 kg/metre) rail, climbed the 2 1/2% to 3% grades, and worked around curves as tight as 20-25 degrees.
See Locobase 13455 to later engines equipped for oil burning.
Locobase 12408 describes the first two locomotives of this arrangement to work on the Oahu Sugar's plantation lines.
Eight years after they were delivered, the company added the Waikakalaua; the one change was conversion to oil firing fueled by 250 gallons in a rear bunker and an increase in tank capacity to 850 gallons. 46 years later, this engine would be sold to the Railway & Locomotive Historical Society, which would display it in Los Angeles' Travel Town.
After another 8 years, the Oahu Sugar Company completed its quartet of radial tanks with Koalipea. This engine repeated the Waikakalua's dimensions and fuel method, but had greater water capacity of 880 US gallons (3,331 litres). Its adhesion weight rose to 47,000 lb (21,319 kg) and engine weight increased to 55,000 lb (24,948 kg).
|Specifications by Steve Llanso of Sweat House Media|
|Railroad||Oahu Sugar Company||Oahu Sugar Company|
|Number in Class||4||2|
|Builder||Burnham, Williams & Co||Burnham, Williams & Co|
|Locomotive Length and Weight|
|Ratio of driving wheelbase to overall engine wheebase||0.53||0.53|
|Overall Wheelbase (engine & tender)||13.25'||13.25'|
|Axle Loading (Maximum Weight per Axle)|
|Weight on Drivers||44000 lbs||45000 lbs|
|Engine Weight||51000 lbs||51000 lbs|
|Tender Light Weight|
|Total Engine and Tender Weight||51000 lbs||51000 lbs|
|Tender Water Capacity||550 gals||650 gals|
|Tender Fuel Capacity (oil/coal)||250 gals|
|Minimum weight of rail (calculated)||24 lb/yard||25 lb/yard|
|Geometry Relating to Tractive Effort|
|Boiler Pressure||160 psi||160 psi|
|Cylinders (dia x stroke)||12" x 16"||12" x 16"|
|Tractive Effort||9495 lbs||9495 lbs|
|Factor of Adhesion (Weight on Drivers/Tractive Effort)||4.63||4.74|
|Firebox Area||39.50 sq. ft||39.50 sq. ft|
|Grate Area||8.80 sq. ft||8.80 sq. ft|
|Evaporative Heating Surface||450 sq. ft||450 sq. ft|
|Combined Heating Surface||450 sq. ft||450 sq. ft|
|Evaporative Heating Surface/Cylinder Volume||214.86||214.86|
|Computations Relating to Power Output (More Information)|
|Robert LeMassena's Power Computation||1408||1408|
|Same as above plus superheater percentage||1408||1408|
|Same as above but substitute firebox area for grate area||6320||6320|