Data from Howell, Comparative Statistics of the Australasian Railways, Journal of the Royal Statistical Society, March 1899, pp. 96-97. Dubs and Neilson (which would shortly add their works to the North British Locomotive Company) supplied these engines.
These engines went into service as the heaviest locomotives that could negotiate the 45-lb rails of the Eastern Goldfields. Although they lost their original jobs to the Baldwin Ec engines that arrived after the turn of the century, they continued in branch-line service for decades.
Ten were converted to N-class tank engines (see Locobase 9564) while the earliest of the rest to be retired left in 1941 and the last endured until 1961.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | O |
| Locobase ID | 9565 |
| Railroad | Western Australia |
| Country | Australia |
| Whyte | 2-8-0 |
| Number in Class | |
| Road Numbers | |
| Gauge | 3'6" |
| Number Built | |
| Builder | several |
| Year | 1896 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | |
| Engine Wheelbase (ft / m) | |
| Ratio of driving wheelbase to overall engine wheelbase | |
| Overall Wheelbase (engine & tender) (ft / m) | |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | |
| Engine Weight (lbs / kg) | 77,280 / 35,054 |
| Tender Loaded Weight (lbs / kg) | 53,648 / 24,334 |
| Total Engine and Tender Weight (lbs / kg) | 130,928 / 59,388 |
| Tender Water Capacity (gals / ML) | 3000 / 11.36 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 5.50 / 5 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 36 / 914 |
| Boiler Pressure (psi / kPa) | 160 / 1100 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 15.5" x 21" / 394x533 |
| Tractive Effort (lbs / kg) | 19,060 / 8645.48 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | |
| Firebox Area (sq ft / m2) | 93 / 8.64 |
| Grate Area (sq ft / m2) | 15.75 / 1.46 |
| Evaporative Heating Surface (sq ft / m2) | 867 / 80.58 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 867 / 80.58 |
| Evaporative Heating Surface/Cylinder Volume | 189.04 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2520 |
| Same as above plus superheater percentage | 2520 |
| Same as above but substitute firebox area for grate area | 14,880 |
| Power L1 | 2788 |
| Power MT | |