NZR G class (1874)
NZR G Class (1874) | |
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Type and origin | |
Builder | Black, Hawthorn & Co (4) |
Build date | 1873 |
Specifications | |
Configuration | 4-4-0T |
Driver diameter | 36 in (0.914 m) |
Weight on drivers | 13.2 long tons (13.4 t; 14.8 short tons) |
Locomotive weight | 18.2 long tons (18.5 tonnes; 20.4 short tons) |
Boiler pressure | 130 lbf/in2 (0.90 MPa) |
Firegrate area | 9 sq ft (0.84 m2) |
Heating surface: – Total | 486 sq ft (45.2 m2) |
Cylinders | Two, outside |
Cylinder size | 10.5 in × 18 in (267 mm × 457 mm) |
Performance figures | |
Tractive effort | 4,893 lbf (21.77 kN) |
Career | |
Operator(s) | NZR |
The NZR G Class was a class of four saddle tank locomotives from English builders Black Hawthorn in the early 1870s. Like the similarly sized D class, they were an attempt to produce a passenger version of the already highly successful F class.
Origin and design
The G class were ordered by the Canterbury Provincial Council. They were derived from the F class, replacing the first of the three driving axles with a four-wheel bogie. It was hoped that the reduced rigid wheelbase would allow the locomotive to provide higher speed passenger services. The type suffered from lack of weight on the driving axles, a driver stating that "it took the 'G' all its time to push its front bogie along, let alone pull a load".[1] They were followed by the L Class which were a more successful attempt to produce a faster F Class.
Service
In the early 1890s the locomotives were progressively transferred to the Picton section, where it was felt that they had been relegated to get rid of them from the busy Hurunui-Bluff section.
Withdrawal & Disposal
All of the locomotives were withdrawn between 1915 and 1919 and were sold for further service in industry.
Class register
Key: | In service | Out of service | Auckland Transport service | Preserved | Overhaul/Repair | Scrapped |
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Number | Builder | Entered service | Withdrawn | Notes |
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55 | Black Hawthorn | 1-1-1875 | 24-7-1915 | Sold to NZ Coal & Oil Co., Kaitangata (1915–27), Shag Point Coal Co., Shag Point (1927-1936) |
56 | Black Hawthorn | 1-1-1875 | 20-7-1918 | Manawatu County Council, Sanson Tramway (1918–44) |
57 | Black Hawthorn | 3-1-1875 | 23-6-1917 | Castlecliff Railway Co., (1917–56) |
58 | Black Hawthorn | 2-1-1875 | 31-3-1919 | Gamman & Co., (1919–38) |
References
Citations
- ↑ Millar 2011, p. 108.
Bibliography
- Lloyd, W.G. (2002); Register of New Zealand Railways Steam Locomotives 1863-1971, Otago Railway & Locomotive Society/Triple M Publications
- Millar, Sean (2011). The NZR Steam Locomotive. New Zealand Railway & Locomotive Society. ISBN 978-0-908573-89-9.
- W.W.Stewart (1970), When Steam Was King, REED
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