Millars, Karri & Jarra Forests Railway 2-4-2 Locomotives in Australia


Class Details by Steve Llanso of Sweat House Media

Class Swan (Locobase 12300)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 21, p. 275. Works number 16313 in November 1898.

The specs for this tank noted it would have to tackle "very steep grades". In addition to a saddle tank that carried 1,000 gallons, the Swan also trailed a tender containing another 1,800 gallons.

Principal Dimensions by Steve Llanso of Sweat House Media

ClassSwan
Locobase ID12300
RailroadMillars, Karri & Jarra Forests Railway
CountryAustralia
Whyte2-4-2T
Number in Class1
Road Numbers
Gauge3'6"
Number Built1
BuilderBurnham, Williams & Co
Year1898
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m) 5.67 / 1.73
Engine Wheelbase (ft / m)21 / 6.40
Ratio of driving wheelbase to overall engine wheelbase 0.27
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)44,000 / 19,958
Engine Weight (lbs / kg)66,000 / 29,937
Tender Loaded Weight (lbs / kg)29,000 / 13,154
Total Engine and Tender Weight (lbs / kg)95,000 / 43,091
Tender Water Capacity (gals / ML)2800 / 6.82
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)37 / 18.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)37 / 940
Boiler Pressure (psi / kPa)160 / 11
High Pressure Cylinders (dia x stroke) (in / mm)14" x 16" / 356x406
Tractive Effort (lbs / kg)11,527 / 5228.57
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.82
Heating Ability
Tubes (number - dia) (in / mm)114 - 1.75" / 44
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m) 9.25 / 2.82
Firebox Area (sq ft / m2)75.80 / 7.04
Grate Area (sq ft / m2)10.90 / 1.01
Evaporative Heating Surface (sq ft / m2)548 / 50.93
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)548 / 50.93
Evaporative Heating Surface/Cylinder Volume192.23
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1744
Same as above plus superheater percentage1744
Same as above but substitute firebox area for grate area12,128
Power L13208
Power MT321.47

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