NZR G class (1874)
| NZR G Class (1874) |
| Type and origin |
| Builder |
Black, Hawthorn & Co (4) |
| Build date |
1873 |
|
| Specifications |
Configuration:
|
|
| • Whyte
|
4-4-0T |
|
Driver dia. |
36 in (0.914 m) |
| Adhesive weight |
13.2 long tons (13.4 t; 14.8 short tons) |
| Loco weight |
18.2 long tons (18.5 tonnes; 20.4 short tons) |
Firebox:
• Firegrate area |
9 sq ft (0.84 m2) |
| Boiler pressure |
130 lbf/in2 (0.90 MPa) |
| Heating surface |
486 sq ft (45.2 m2) |
| Cylinders |
Two, outside |
| Cylinder size |
10.5 in × 18 in (267 mm × 457 mm) |
|
|
|
| Career |
| Operators |
NZR |
| Disposition |
All scrapped |
|
| Type and origin |
| Builder |
Black, Hawthorn & Co (4) |
| Build date |
1873 |
| Specifications |
Configuration:
|
|
| • Whyte
|
4-4-0T |
|
Driver dia. |
36 in (0.914 m) |
| Adhesive weight |
13.2 long tons (13.4 t; 14.8 short tons) |
| Loco weight |
18.2 long tons (18.5 tonnes; 20.4 short tons) |
Firebox:
• Firegrate area |
9 sq ft (0.84 m2) |
| Boiler pressure |
130 lbf/in2 (0.90 MPa) |
| Heating surface |
486 sq ft (45.2 m2) |
| Cylinders |
Two, outside |
| Cylinder size |
10.5 in × 18 in (267 mm × 457 mm) |
| Career |
| Operators |
NZR |
| Disposition |
All scrapped |
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.
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". They were followed by the L Class which were a more successful attempt to produce a faster F Class.
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.
All of the locomotives were withdrawn between 1915 and 1919 and were sold for further service in industry.
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Wikipedia
