NZR S class

NZR S class
Type and origin
Power type Steam
Builder Avonside Engine Co., England
Build date 1880-1881
Specifications
Configuration:
 ​
 • Whyte 0-6-4T
Gauge 3 ft 6 in (1,067 mm)
Driver dia. 36.5 in (0.927 m)
Adhesive weight 23 long tons (23 t; 26 short tons)
Loco weight 37.5 long tons (38.1 t; 42.0 short tons)
Firebox:
 • Firegrate area		 14 sq ft (1.3 m2)
Boiler pressure 160 psi (1,103 kPa)
Heating surface 664 sq ft (61.7 m2)
Cylinders Two, outside
Cylinder size 13 in × 16 in (330 mm × 406 mm)
Performance figures
Tractive effort 9,480 lbf (42.17 kN)
Career
Operators New Zealand Railways Department
Number in class 7

The NZR S class was a class of seven 0-6-4T single Fairlie steam locomotives used in New Zealand.

The locomotives were ordered by the New Zealand Railways Department (NZR) in 1880, and delivered from the Avonside engine works in 1881–1882. They were considerably larger than the earlier R class, and all saw service in the Wanganui district, with its abundance of sharp curves and grades. These two classes of Single Fairlies were considerably more popular with the engine crews than their older Double Fairlie counterparts, which often suffered frame breakages whilst operating in the Wanganui district.

In the 1880s despite complaining of a lack of motive power, the residing chief mechanical engineer T.F.Rotheram arranged the shipment of three of this class to the Western Australian Government Railways.

S class roster

Road
number 		Builders
number 		In
service 		Written
off 		Comments
NZR S class steam locomotives
212 1279/1880 13 Apr 1882 Mar 1927
213 1280/1880 17 Jul 1882 Mar 1927
214 1284/1880 20 Jul 1883 Mar 1922
215 1283/1880 18 Feb 1885 Aug 1891 Sold to WAGR. In service as I 25 1891-1900.
216 1285/1880 25 Feb 1885 Aug 1891 Sold to WAGR. In service as I 26 1891-1900.
217 1281/1880 31 Jul 1886 Aug 1891 Sold to WAGR. In service as I 27 1891-1900.
218 1282/1880 21 May 1887 Mar 1927

References

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