Pioneer Mill 0-6-2 Locomotives in the USA


Class Details by Steve Llanso of Sweat House Media

Class Mala (Locobase 14527)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Vol 54, p 410. See also "Pioneer Mill Company: A Maui Sugar Plantation Legacy" presented at [] and the Hawaiian Sugar Planters' Association Plantation Archive entry for http://www2.hawaii.edu/~speccoll/p_pioneer.html . Works number was 41756 in October 1914.

Pioneer Mill was located on the west side of the island of Maui and began production at the surprisingly early date of 1864.


Class Waliikuli (Locobase 12451)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 20, p. 124 and Volume 23, p 146. See also "Sugar Cane Plantations in Maui", Tour Maui website at https://www.tourmaui.com/maui-sugar-cane/, last accessed 23 May 2019. Works number was 18458 in December 1900.

Founded in 1860, Pioneer Mill in Lahaina in West Maui covered 600 acres (250 ha) on the Hawai'ian Islands. By 1876, tourmaui notes proudly, the mill "won an award at the Philadelphia World's Fair for its fine quality sugar.". A "mainstay" of West Maui's economy, the company had put 8,000 acres (3,333 ha) under cultivation by 1910. Eventually the mill harvested an area that was 10 miles (16 km) long and 1/2 mile wide (0.8 km) at elevations between 10 feet (3.05 metres) and 700 feet (213 metres).

"This land was so productive," added tourmaui, "that some fields could produce sugar cane without plowing or replanting for as long as 10 years! [emphasis in original]...At its peak in 1935, the plantation cultivated 10,000 acres and processed 60,000 tons of sugar."

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Principal Dimensions by Steve Llanso of Sweat House Media
ClassMalaWaliikuli
Locobase ID14,527 12,451
RailroadPioneer MillPioneer Mill
CountryUSAUSA
Whyte0-6-2ST0-6-2ST
Number in Class11
Road Numbers54
Gauge2'7""2'6""
Number Built11
BuilderBaldwinBurnham, Williams & Co
Year19141900
Valve GearStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 7.50 / 2.297 / 2.13
Engine Wheelbase (ft / m)14.58 / 4.4413.25 / 4.04
Ratio of driving wheelbase to overall engine wheebase 0.51 0.53
Overall Wheelbase (engine & tender) (ft / m)14.58 / 4.4413.25 / 4.04
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)40,000 / 18,14424,000 / 10,886
Engine Weight (lbs / kg)46,000 / 20,86531,000 / 14,061
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)46,00031,000
Tender Water Capacity (gals / ML)550 / 2.08450 / 1.70
Tender Fuel Capacity (oil/coal) (gals/tons / ML/MT)200 / 0.80
Minimum weight of rail (calculated) (lb/yd / kg/m)22 / 1113 / 6.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)33 / 83833 / 838
Boiler Pressure (psi / kPa)160 / 11150 / 10.30
High Pressure Cylinders (dia x stroke) (in / mm)11" x 16" / 279x40610" x 16" / 254x406
Tractive Effort (lbs / kg)7979 / 3619.226182 / 2804.11
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.01 3.88
Heating Ability
Firebox Area (sq ft / m2)26 / 2.4231 / 2.88
Grate Area (sq ft / m2) 8.80 / 0.82 7.22 / 0.67
Evaporative Heating Surface (sq ft / m2)356 / 33.07290 / 26.95
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)356 / 33.07290 / 26.95
Evaporative Heating Surface/Cylinder Volume202.29199.39
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation14081083
Same as above plus superheater percentage14081083
Same as above but substitute firebox area for grate area41604650
Power L124302524
Power MT401.79695.56

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