NZR M class

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.[1]

NZR M Class
Image courtesy of A P Godber Collection, Alexander Turnbull Library
Type and origin
Power typeSteam
BuilderHunslet
Build date1875
Total produced4
RebuilderNZR
Rebuild date1888-1890
Specifications
Configuration:
  Whyte0-6-0T
Driver dia.42.25 in (1.073 m)
Loco weight27.7 long tons (28.1 tonnes; 31.0 short tons)
Firebox:
  Firegrate area
8.6 sq ft (0.80 m2)
Boiler pressure130 lbf/in2 (896 kPa)
Heating surface583 sq ft (54.2 m2)
CylindersTwo, outside
Cylinder size13 in × 20 in (330 mm × 508 mm)
Performance figures
Tractive effort7,200 lbf (32.03 kN)
Career
First run1875

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]

Footnotes

    References

    1. Palmer & Stewart 1965, p. 38.
    2. Mahoney, J D (1987) [1982]. Kings of the Iron Road: Steam Passenger Trains of New Zealand. Palmerston North: Dunmore Press. p. 52. ISBN 0-908564-90-2.

    Bibliography

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