These little Mountains ("hills?") are an instructive example of how tractive effort and adhesive weight could be spread out over several axles in a steam locomotive. The requirement, says Nock (RWC VI, pl 43), was for an engine that could tolerate highly saline water and low-calorie Collie coal.
Nicholas Pusenjak of [
Principal Dimensions by Steve Llanso of Sweat House Media | |
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Class | W |
Locobase ID | 2874 |
Railroad | Western Australian Government |
Country | Australia |
Whyte | 4-8-2 |
Number in Class | 60 |
Road Numbers | 901-960 |
Gauge | 3'6" |
Number Built | 60 |
Builder | Beyer, Peacock |
Year | 1951 |
Valve Gear | Walschaert |
Locomotive Length and Weight | |
Driver Wheelbase (ft / m) | 13.37 / 4.08 |
Engine Wheelbase (ft / m) | 31.50 / 9.60 |
Ratio of driving wheelbase to overall engine wheelbase | 0.42 |
Overall Wheelbase (engine & tender) (ft / m) | |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | 22,050 / 10,002 |
Weight on Drivers (lbs / kg) | 87,040 / 39,481 |
Engine Weight (lbs / kg) | |
Tender Loaded Weight (lbs / kg) | |
Total Engine and Tender Weight (lbs / kg) | |
Tender Water Capacity (gals / ML) | |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 36 / 18 |
Geometry Relating to Tractive Effort | |
Driver Diameter (in / mm) | 48 / 1219 |
Boiler Pressure (psi / kPa) | 204.50 / 14.10 |
High Pressure Cylinders (dia x stroke) (in / mm) | 16" x 24" / 406x610 |
Tractive Effort (lbs / kg) | 22,250 / 10092.44 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.91 |
Heating Ability | |
Tubes (number - dia) (in / mm) | 70 - 2" / 51 |
Flues (number - dia) (in / mm) | 22 - 5.25" / 133 |
Flue/Tube length (ft / m) | 14 / 4.27 |
Firebox Area (sq ft / m2) | 187 / 17.38 |
Grate Area (sq ft / m2) | 27 / 2.51 |
Evaporative Heating Surface (sq ft / m2) | 1117 / 103.81 |
Superheating Surface (sq ft / m2) | 305 / 28.35 |
Combined Heating Surface (sq ft / m2) | 1422 / 132.16 |
Evaporative Heating Surface/Cylinder Volume | 200.00 |
Computations Relating to Power Output (More Information) | |
Robert LeMassena's Power Computation | 5522 |
Same as above plus superheater percentage | 6681 |
Same as above but substitute firebox area for grate area | 46,272 |
Power L1 | 14,052 |
Power MT | 1423.68 |