NZR O class
| NZR O class | |
|---|---|
| Type and origin | |
| Power type | Steam |
| Builder | Baldwin Locomotive Works |
| Serial number |
7565–7569, 7572 (not in engine number order) |
| Build date | 1885 |
| Specifications | |
| Configuration | 2-8-0 |
| Gauge | 3 ft 6 in (1,067 mm) |
| Driver diameter | 36.25 in (0.921 m) |
| Length | 46 ft 3 in (14.10 m) |
| Weight on drivers | 25.2 long tons (25.6 tonnes; 28.2 short tons) |
| Locomotive and tender combined weight | 45.5 long tons (46.2 t; 51.0 short tons) |
| Boiler pressure | 130 lbf/in2 (896 kPa) |
| Firegrate area | 15.2 sq ft (1.41 m2) |
| Heating surface: – Total | 908 sq ft (84.4 m2) |
| Cylinders | Two, outside |
| Cylinder size | 15 in × 18 in (381 mm × 457 mm) |
| Performance figures | |
| Tractive effort | 10,055 lbf (44.73 kN) |
| Career | |
| Operator(s) | New Zealand Government Railways |
| Number in class | 6 |
| Number(s) | 31, 54, 59, 98-100 |
| Retired | May 1922 |
The O class consisted of six steam locomotives that operated on New Zealand's national rail network. Ordered from the Baldwin Locomotive Works of Pennsylvania in 1885, three arrived in time to begin work in December 1885, while two more were placed in service in January 1886 and the sixth in February 1886. After almost four decades of service, all six were withdrawn in May 1922. None survived to be preserved, although two engine frames and 5 tenders from O class locomotives are known to exist near Summit on the former Rimutaka Incline.
External links
| ||||||||||||||||||||||||||||||||||||||||||||||||||