NZR G class (1874)

NZR G Class (1874)

Type and origin
Builder	Black, Hawthorn & Co (4)
Build date	1873

Specifications
Configuration	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)

Performance figures
Tractive effort	4,893 lbf (21.77 kN)

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.

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All of the locomotives were withdrawn between 1915 and 1919 and were sold for further service in industry.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	On lease	Out of service	Preserved	Overhaul/Repair	Scrapped

Number	Builder	Entered service	Withdrawn	Notes
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) Display at Opunake 1957-1970. Scrapped in 1971
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

Rail vehicles of New Zealand

Diesel locomotives

Diesel Multiple Units

Electric locomotives

1500 V DC	E^A (later EO of 1968) E^C E^D E^O of 1923 E^W

25 kV AC	EF

Battery	E E^B

Electric Multiple Units

1500 V DC (Wellington)	"English Electric" D^M (inc. D trailers) "Ganz Mavag" EM (inc. ET trailers) "Matangi" FP (inc. FT trailers)

25 kV AC (Auckland)	AM (inc. AMP, AMT, AMA)

Railcars

RM class	88 seater (also known as Fiats or twinsets) Clayton steam railcar Edison battery-electric railcar Midland railcar Leyland experimental petrol railcar MacEwan-Pratt petrol railcar Model T Ford railcar Sentinel-Cammell steam railcar Silver Fern Standard Thomas Transmission Vulcan Wairarapa Westinghouse

Others	A 88 Buckhurst petrol carriage

Steam locomotives

A of 1873
A of 1906 (inc. A^D)
A^A
A^B
B of 1874
B of 1899
B^A
B^B
B^C
C of 1873
C of 1930
D of 1874
D of 1929
E of 1872 & 1875
E of 1906
F
F^A (inc. F^B)
G of 1874
G Garratt of 1928 (inc. Pacific rebuild)
H
J of 1874
J of 1939
J^A
J^B
K of 1877
K of 1932
K^A
K^B
L
L^A
M
N
N^A
N^C
O
O^A
O^B
O^C
P of 1876
P of 1885
Q of 1878
Q of 1901
R
S
T
U
U^A
U^B
U^C
U^D
V
W
W^A
W^AB
W^B
W^D
W^E
W^F
W^G
W^H
W^J
W^S
W^W
X
Y

Locomotive hauled carriages

See also: Locomotives of New Zealand.

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