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Specifications
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:
• Grate 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)

Type and origin
Type and origin
Power type	Steam
Builder	Hunslet
Build date	1875
Total produced	4
Rebuilder	NZR
Rebuild date	1888-1890

NZR M Class
NZR M Class
	Image courtesy of A P Godber Collection, Alexander Turnbull Library
Power type
Type and origin
Power type	Steam
Builder	Hunslet
Build date	1875
Total produced	4
Rebuilder	NZR
Rebuild date	1888-1890
Configuration:;
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:
• Grate 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)
Tractive effort
Performance figures
Tractive effort	7,200 lbf (32.03 kN)
First run
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.^[1]

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

^ Palmer & Stewart 1965, p. 38.
^ 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

Millar, Sean (2011). The NZR Steam Locomotive. Wellington: New Zealand Railway and Locomotive Society. ISBN 978-0-908573-89-9.
Palmer, A. N.; Stewart, W. W. (1965). Cavalcade of New Zealand Locomotives. Wellington: A H. & A W. Reed. ISBN 978-0-207-94500-7.
Stewart, W. W. (1974). When Steam was King. Wellington: A. H. & A. W. Reed Ltd. ISBN 978-0-589-00382-1.