Waiakea Mill Company 0-4-2 Locomotives of the USA


Class Details by Steve Llanso of Sweat House Media

Class Kapunakea (Locobase 14525)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 54, p. 406. See Locobase 14212 for a description of the plantation system this locomotive served. Works number 44281 in October 1916.

This was a larger version of the tanks bought for Waiakea Mill in 1909 and 1911, which are described in Locobase 14212.


Class Waiakea (Locobase 14212)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Vol 49, p. 181. Works numbers were 33478 in June 1909 and 37228 in November 1911

Theo. H. Davies & Co owned several sugar plantations and was counted among the "Big Five" of the Hawaiian sugar business in particular and Hawaiian politics as well.

The General Plan history describes the camps that served these plantations: "The self-sufficient camps, generally divided by ethnicity, were comprised of schools, stores,

churches, recreational facilities, and medical centers. Plantation camps, often named for their ethnic inhabitants such as 'Portuguese Camp' or 'Hawaiian Spanish Village', perpetuated the cultural traditions of each group, which in turn has had a profound influence on modern day Maui."

To serve its far-flung plantation systems, T H Davies had Brewer & Company buy a series of saddletanks. The first of the two shown in the same spec headed for the Waiakea Sugar Mill on the Big Island of Hawai'i. Kaeleku was the second of the two in the order and was delivered two years later to the namesake plantation on Maui. By 1931, it too was operating on the Big Island for the Hamakua Sugar Mill.

Specifications by Steve Llanso of Sweat House Media
ClassKapunakeaWaiakea
Locobase ID14525 14212
RailroadWaiakea Mill CompanyWaiakea Mill Company
CountryUSAUSA
Whyte0-4-2T0-4-2ST
Number in Class12
Road Numbers4
Gauge3'3'
Number Built12
BuilderBaldwinBurnham, Williams & Co
Year19171909
Valve GearStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase4' 3.75'
Engine Wheelbase10.33' 9.58'
Ratio of driving wheelbase to overall engine wheebase 0.39 0.39
Overall Wheelbase (engine & tender)10.33' 9.58'
Axle Loading (Maximum Weight per Axle)
Weight on Drivers27000 lbs19500 lbs
Engine Weight32000 lbs22500 lbs
Tender Light Weight
Total Engine and Tender Weight32000 lbs22500 lbs
Tender Water Capacity500 gals300 gals
Tender Fuel Capacity (oil/coal)250 gals gals
Minimum weight of rail (calculated)23 lb/yard16 lb/yard
Geometry Relating to Tractive Effort
Driver Diameter30"30"
Boiler Pressure160 psi150 psi
Cylinders (dia x stroke)9" x 14"8" x 12"
Tractive Effort5141 lbs3264 lbs
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.25 5.97
Heating Ability
Firebox Area32 sq. ft25 sq. ft
Grate Area 8.20 sq. ft6 sq. ft
Evaporative Heating Surface225 sq. ft175 sq. ft
Superheating Surface
Combined Heating Surface225 sq. ft175 sq. ft
Evaporative Heating Surface/Cylinder Volume218.27250.67
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1312900
Same as above plus superheater percentage1312900
Same as above but substitute firebox area for grate area51203750
Power L129883223
Power MT487.96728.77


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