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Western Australian Government Railways classes O and Oa
The class O was a 2-8-0 locomotive for freight service on light rails around the Eastern Goldfields. It had small drivers with a diameter of three feet and cylinders with a diameter of 15.5 inches and a stroke of 21 i...
General
| Property | Western Australian Government Railways classes O and Oa Remove |
|---|---|
| Built | 1909-1912 |
| Manufacturers | Midland Railway Workshops |
| Wheel arrangement | 2-8-0 (Consolidation) |
| Gauge | 1,067 mm (Cape gauge) |
Dimensions and weights
| Property | Western Australian Government Railways classes O and Oa Remove |
|---|---|
| Total weight | 63.7 t |
| Water capacity | 9,093 l |
| Fuel capacity | 7.6 t (coal) |
Boiler
| Property | Western Australian Government Railways classes O and Oa Remove |
|---|---|
| Grate area | 1.463 m² |
| Firebox surface | 8.64 m² |
| Tube heating surface | 71.907 m² |
| Evaporative heating surface | 80.547 m² |
| Total heating surface | 80.5 m² |
Power plant
| Property | Western Australian Government Railways classes O and Oa Remove |
|---|---|
| Driver diameter | 1,080 mm |
| Boiler pressure | 11 bar |
| Expansion type | simple expansion |
| Cylinders | two, 394 x 533 mm |
Power
| Property | Western Australian Government Railways classes O and Oa Remove |
|---|---|
| Power source | steam |
| Estimated power | 280 kW (381 PS) |
| Starting effort | 71.8 kN |
Calculated values
| Property | Western Australian Government Railways classes O and Oa Remove |
|---|---|
| Optimal speed | 24 km/h |
| Power-to-weight ratio | 4.4 kW/t |
| Heating Surface Equivalent | 123.7 m² |
| Cylinder volume/HSE | 1 : 1,049.47 |
| Tractive force/Heating surface | 1 : 18.62 |
| Grate area/Heating surface | 1 : 55.06 |
| Firebox/Tube surface | 1 : 8.32 |
