| Queensland B12 class locomotive | |
|---|---|
| B12 Locomotive no. 17 on display at Roma Street, 1914 | |
| Power type | Steam |
| Builder | Kitson and Company (12) Avonside Engine Company (3) Dübs and Company (6) Neilson and Company (2) Ipswich workshops (2) |
| Build date | 1874-1882 |
| Total produced | 25 |
| Configuration | 2-6-0 |
| Gauge | 3 ft 6 in (1,067 mm) |
| Driver diameter | 39 in (0.991 m) |
| Boiler pressure | 120 lbf/in² (827 kPa) |
| Cylinders | Two, outside |
| Cylinder size | 12 × 20 in (305 × 508 mm) |
| Valve gear | Stephenson |
| Career | Queensland Railways |
| Class | B12 |
The B12 class steam locomotive was a 2-6-0 locomotive of the Queensland Railways (QR).[1]
The locomotives operated on 1,067 mm (3 ft 6 in) gauge. The “B”, is used to identify the number of coupled wheels, being six coupled wheels for the B12 class, followed by numerals indicating the cylinder diameter of twelve inches.
| Builder | Serial No. | Year | QR No. |
|---|---|---|---|
| Kitson and Company | 1986–1993 | 1874 | 23–24, 136, 25–27, 137–138 |
| Kitson and Company | 2042–2045 | 1875 | 28–30, 139 |
| Neilson and Company | 2275–2275 | 1877 | 140–141 |
| Avonside Engine Company | 1179–1181 | 1877 | 31–33 |
| Ipswich workshops | 2–3 | 1878 | 34–35 |
| Dübs and Company | 1136 | 1878 | 40 |
| Dübs and Company | 1137 | 1878 | 142 |
| Dübs and Company | 1604–1607 | 1882 | 15, 16, 18, 17 |
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