The HSC consisted of seven sugar companies: Hamakua Mill Company, Honoka`a Sugar, Kaiwiki Sugar, Kukaiau Plantation Co., Laupahoehoe Sugar, Pa`auhau Sugar Plantation and Pacific Sugar Mill. The radial tank in this spec had an "arsenical copper" firebox.
Hawaiian sugar plantations used a lot of Baldwin rear truck tank engines and the Kokee fit right in. It was an oil burner with especially small drivers, which cut speed but increased tractive effort.
This engine was later sold for $4,000 to Grove Farm on Kauai in 1941 and renamed Kaipu after the owner's "right-hand man". It was retired in 1953, stored under cover, and was restored for operation in 1982.
This saddle-tanker was another in a series of sugar-plantation locomotives that shared the same power, boiler, and firebox dimensions. The only real differences among the group (mostly exported to Hawaiian islands) were gauge and weight. The Mokuaweoweo weighed a bit more than the others.
Honolulu Sugar operated the engine until 1938, when it was sold to the Honokaa Sugar Co.
|Specifications by Steve Llanso of Sweat House Media|
|Railroad||Hamakua Sugar Company||Hawaiian Sugar Company||Honolulu Sugar Company|
|Number in Class||1||1||1|
|Builder||Baldwin||Baldwin||Burnham, Williams & Co|
|Locomotive Length and Weight|
|Ratio of driving wheelbase to overall engine wheebase||0.52||0.49||0.53|
|Overall Wheelbase (engine & tender)||13.58'||13'||13.25'|
|Axle Loading (Maximum Weight per Axle)|
|Weight on Drivers||33000 lbs||36000 lbs||28000 lbs|
|Engine Weight||37000 lbs||46000 lbs||34000 lbs|
|Tender Light Weight|
|Total Engine and Tender Weight||37000 lbs||46000 lbs||34000 lbs|
|Tender Water Capacity||450 gals||700 gals||500 gals|
|Tender Fuel Capacity (oil/coal)||250 gals||250 gals||gals|
|Minimum weight of rail (calculated)||18 lb/yard||20 lb/yard||16 lb/yard|
|Geometry Relating to Tractive Effort|
|Boiler Pressure||165 psi||165 psi||150 psi|
|Cylinders (dia x stroke)||10" x 16"||10" x 16"||10" x 16"|
|Tractive Effort||6800 lbs||7480 lbs||6182 lbs|
|Factor of Adhesion (Weight on Drivers/Tractive Effort)||4.85||4.81||4.53|
|Firebox Area||36 sq. ft||36 sq. ft||31 sq. ft|
|Grate Area||7.10 sq. ft||7.30 sq. ft||7.22 sq. ft|
|Evaporative Heating Surface||321 sq. ft||321 sq. ft||290 sq. ft|
|Combined Heating Surface||321 sq. ft||321 sq. ft||290 sq. ft|
|Evaporative Heating Surface/Cylinder Volume||220.70||220.70||199.39|
|Computations Relating to Power Output (More Information)|
|Robert LeMassena's Power Computation||1172||1205||1083|
|Same as above plus superheater percentage||1172||1205||1083|
|Same as above but substitute firebox area for grate area||5940||5940||4650|