Wood-burning Halawa and Waimalu were two saddle-tanks bought by the American Sugar Corporation for operation on their Honolulu Sugar Plantation. The working environment offered some challenges. Halawa faced grades of between 2% and 3 1/2% and curve radii of between 16-26 degrees. Each of the cane cars had a tare weight of 2,800-3,000 lb and would carry between 3 1/2 and 5 tons.
A note in the Baldwin specs said that the HSP said that the water tank was too small and that "Parmalee" suggested that the company adopt separate tenders. The equalizers between the main and rear drivers were badly worn. And the note included the nearly universal comment for logging and plantation locomotives: "Track is rough and springs should have one more plate."
They were joined by near sister Manana in 1916 which used oil fuel. Its bunker carried 600 US gallons (2,271 litres) of water and 350 gallons (1,325 litres) of oil. All three were members of a relatively large group of Baldwin plantation tanks built to the same design..
All of the engines received four-wheel tenders, but retained their saddle tanks. (Does this make them 0-6-2(ST)?.) A 1921 extra order from Baldwin delivered a new boiler for Waimalue; Halawa's came as a result of a 1924 extra order.
The two were transferred to the Kahuku Plantation and renumbered 9 and 8. In 1947, HSC sold both engines to Hawaiian Philippine Sugar in Silay City, Island of Negros, Philippines
After four more decades of work, the two were idled in 1998.
Their fates still linked, the two locomotives were to be purchased for restoration by the Kauai Plantation Railway. By 2015, funding had still to be identified and a crowd-funding site had been set up.
|Principal Dimensions by Steve Llanso of Sweat House Media|
|Number in Class||5|
|Road Numbers||1-2, 5|
|Builder||Burnham, Williams & Co|
|Locomotive Length and Weight|
|Driver Wheelbase (ft / m)||7 / 2.13|
|Engine Wheelbase (ft / m)||13 / 3.96|
|Ratio of driving wheelbase to overall engine wheebase||0.54|
|Overall Wheelbase (engine & tender) (ft / m)||13 / 3.96|
|Axle Loading (Maximum Weight per Axle) (lbs / kg)|
|Weight on Drivers (lbs / kg)||36,000 / 16,329|
|Engine Weight (lbs / kg)||42,000 / 19,051|
|Tender Loaded Weight (lbs / kg)|
|Total Engine and Tender Weight (lbs / kg)||42,000|
|Tender Water Capacity (gals / ML)||500 / 1.89|
|Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)|
|Minimum weight of rail (calculated) (lb/yd / kg/m)||20 / 10|
|Geometry Relating to Tractive Effort|
|Driver Diameter (in / mm)||33 / 838|
|Boiler Pressure (psi / kPa)||130 / 9|
|High Pressure Cylinders (dia x stroke) (in / mm)||11" x 16" / 279x406|
|Tractive Effort (lbs / kg)||6483 / 2940.64|
|Factor of Adhesion (Weight on Drivers/Tractive Effort)||5.55|
|Firebox Area (sq ft / m2)||35.70 / 3.32|
|Grate Area (sq ft / m2)||7.38 / 0.69|
|Evaporative Heating Surface (sq ft / m2)||336 / 31.22|
|Superheating Surface (sq ft / m2)|
|Combined Heating Surface (sq ft / m2)||336 / 31.22|
|Evaporative Heating Surface/Cylinder Volume||190.92|
|Computations Relating to Power Output (More Information)|
|Robert LeMassena's Power Computation||959|
|Same as above plus superheater percentage||959|
|Same as above but substitute firebox area for grate area||4641|