Karri & Jarra Forests Railway 4-6-2 Locomotives in Australia


Class Details by Steve Llanso of Sweat House Media

Class Jubilee (Locobase 10102)

Data from "Six-Coupled Bogie Engine for Western Australia" The Locomotive & Railway Carriage & Wagon Review, Vol III (September 1898), p. 138 and Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 20, p. 269. Works number 15434 in September 1897.

This is one of the earliest Pacifics and one that clearly was not designed for express passenger work. Indeed, the wheel arrangement may have been adopted more to spread out the weight than support a large firebox. On the other hand, Jubilee's large boiler dwarfed the running gear and nearly put the oversized cab into proper perspective.

Principal Dimensions by Steve Llanso of Middle Run Media
ClassJubilee
Locobase ID10102
RailroadKarri & Jarra Forests Railway
CountryAustralia
Whyte4-6-2
Number in Class1
Road Numbers
Gauge3'6"
Number Built1
BuilderBurnham, Williams & Co
Year1897
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)7 / 2.13
Engine Wheelbase (ft / m)21.83 / 6.65
Ratio of driving wheelbase to overall engine wheelbase 0.32
Overall Wheelbase (engine & tender) (ft / m)41.92 / 12.78
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)70,600 / 32,024
Engine Weight (lbs / kg)88,000 / 39,916
Tender Loaded Weight (lbs / kg)48,000 / 21,772
Total Engine and Tender Weight (lbs / kg)136,000 / 61,688
Tender Water Capacity (gals / ML)2400 / 9.09
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)39 / 19.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)39 / 991
Boiler Pressure (psi / kPa)160 / 1100
High Pressure Cylinders (dia x stroke) (in / mm)16" x 20" / 406x508
Tractive Effort (lbs / kg)17,854 / 8098.45
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.95
Heating Ability
Tubes (number - dia) (in / mm)194 - 2" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)10.25 / 3.12
Firebox Area (sq ft / m2)92 / 8.55
Grate Area (sq ft / m2)14.50 / 1.35
Evaporative Heating Surface (sq ft / m2)1110 / 103.16
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1110 / 103.16
Evaporative Heating Surface/Cylinder Volume238.49
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2320
Same as above plus superheater percentage2320
Same as above but substitute firebox area for grate area14,720
Power L13508
Power MT328.63

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