The NZR M class were a series of four tank engines built in England for the Otago railways Bluff to Winton section. They were acquired by NZR in the late 1870s and rebuilt in the late 1880s. As rebuilt they were not very successful and were used in shunting duties until retirement in the 1920s.
Power typeSteam
Power typeSteam
Build date1875
Quick facts Type and origin, Power type ...
| NZR M Class |
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 Image courtesy of A P Godber Collection, Alexander Turnbull Library |
| Type and origin |
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| Power type | Steam |
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| Builder | Hunslet |
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| Build date | 1875 |
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| Total produced | 4 |
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| Rebuilder | NZR |
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| Rebuild date | 1888-1890 |
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| Specifications |
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Configuration:
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| • Whyte | 0-6-0T |
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| Driver dia. | 42.25 in (1.073 m) |
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| Loco weight | 27.7 long tons (28.1 tonnes; 31.0 short tons) |
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| Firebox: | |
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| • Grate area | 8.6 sq ft (0.80 m2) |
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| Boiler pressure | 130 lbf/in2 (896 kPa) |
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| Heating surface | 583 sq ft (54.2 m2) |
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| Cylinders | Two, outside |
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| Cylinder size | 13 in × 20 in (330 mm × 508 mm) |
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Close
They were rather ineffectual engines derisively called the Pullets by engine men. They were used on the Napier Express at the turn of the century; either in pairs or with a Baldwin N class when the duo was called a 'en and chicken. [2]
