NZR M class

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NZR M Class
M Class locomotive NZ.jpg
Image courtesy of A P Godber Collection, Alexander Turnbull Library
Type and origin
Power type Steam
Builder Hunslet
Build date 1875
Total produced 4
Rebuilder NZR
Rebuild date 1888-1890
Specifications
Configuration:
 • Whyte 0-6-0T
Driver dia. 42.25 in (1.073 m)
Loco weight 27.7 long tons (28.1 tonnes; 31.0 short tons)
Firebox:
 • Firegrate area
8.6 sq ft (0.80 m2)
Boiler pressure 130 lbf/in2 (896 kPa)
Heating surface 583 sq ft (54.2 m2)
Cylinders Two, outside
Cylinder size 13 in × 20 in (330 mm × 508 mm)
Performance figures
Tractive effort 7,200 lbf (32.03 kN)
Career
First run 1875

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.

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