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Queensland Railways class B15
The class B15 was a 4-6-0 introduced by the Queensland Railways in 1889. The B in the designation stood for three driving axles , while the 15 was the cylinder diameter in inches. It was a mixed traffic locomotive lik...
General
| Property | Queensland Railways class B15 as built |
|---|---|
| Built | 1889-1899 |
| Manufacturers | Nasmyth, Wilson & Co., Evans, Anderson, Phelan & Co., Yorkshire Engine Co., Walkers |
| Wheel arrangement | 4-6-0 (Ten-wheeler) |
| Gauge | 1,067 mm (Cape gauge) |
Dimensions and weights
| Property | Queensland Railways class B15 as built |
|---|---|
| Rigid wheelbase | 2.67 m |
| Total wheelbase | 13.89 m |
| Service weight | 28.4 t |
| Adhesive weight | 21.3 t |
| Axle load | 8.1 t |
| Total weight | 52.6 t |
| Water capacity | 7,730 l |
| Fuel capacity | 6.1 t (coal) |
Boiler
| Property | Queensland Railways class B15 as built |
|---|---|
| Grate area | 1.208 m² |
| Firebox surface | 7.432 m² |
| Tube heating surface | 68.748 m² |
| Evaporative heating surface | 76.181 m² |
| Total heating surface | 76.2 m² |
Power plant
| Property | Queensland Railways class B15 as built |
|---|---|
| Driver diameter | 914 mm |
| Boiler pressure | 11 bar |
| Expansion type | simple expansion |
| Cylinders | two, 381 x 508 mm |
Power
| Property | Queensland Railways class B15 as built |
|---|---|
| Power source | steam |
| Estimated power | 224 kW (305 PS) |
| Starting effort | 75.6 kN |
Calculated values
| Property | Queensland Railways class B15 as built |
|---|---|
| Factor of adhesion | 1 : 2.77 |
| Optimal speed | 18 km/h |
| Power-to-weight ratio | 7.9 kW/t |
| Heating Surface Equivalent | 113.3 m² |
| Cylinder volume/HSE | 1 : 1,022.00 |
| Adhesive weight/Total | 1 : 1.33 |
| Tractive force/Heating surface | 1 : 20.73 |
| Grate area/Heating surface | 1 : 63.06 |
| Firebox/Tube surface | 1 : 9.25 |
