NZR OC class

New Zealand steam locomotive

NZR O^C class

O^C class 2-8-0 steam locomotive NZR number 458

Type and origin
Power type	Steam
Builder	Baldwin Locomotive Works
Serial number	15055
Build date	1896

Specifications
Configuration:
• Whyte	2-8-0
• UIC	1'D
Gauge	3 ft 6 in (1,067 mm)
Length	51 ft 8 in (15.75 m)
Adhesive weight	36.7 long tons (37.3 t; 41.1 short tons)
Total weight	62.8 long tons (63.8 t; 70.3 short tons)
Firebox:
• Grate area	16.7 sq ft (1.55 m²)
Boiler pressure	200 psi (1,379 kPa)
Heating surface	1,050 sq ft (98 m²)
High-pressure cylinder	11 in × 20 in (279 mm × 508 mm)
Low-pressure cylinder	18 in × 20 in (457 mm × 508 mm)

Performance figures
Tractive effort	15,110 lbf (67.21 kN)

Career
Operators	Wellington and Manawatu Railway New Zealand Railways Department
Number in class	1
Numbers	WMR 16 NZR 458
Retired	July 1930

The O^C class, built by the Baldwin Locomotive Works for the Wellington and Manawatu Railway (WMR) in New Zealand, consists of a solitary steam locomotive. Ordered in 1896 as an externally similar but more powerful version of the O^A class locomotive ordered in 1894, it entered service in June 1897 as No. 16. It was a Vauclain compound locomotive.^[1]

In 1908, the WMR and its locomotive fleet was purchased by the New Zealand Railways Department (NZR) and incorporated into the national rail network, and although No. 16 bore a likeness to members of the O class, it was sufficiently different that it warranted separate classification. Technical differences were sufficient that it was not classified with the visually similar WMR No. 13/NZR O^A 457, and it became O^C 458. It is known to have operated on the line from the Hutt Valley through the Rimutaka Range to the western end of the Rimutaka Incline, and its final depot was at Cross Creek at the eastern end of the Rimutaka Incline in the Wairarapa. It was withdrawn from service in July 1930.

External links

Drawing of an O^A/O^C class locomotive from Derek Brown

References

^ Palmer & Stewart 1965, p. 94.

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.

Rail vehicles of New Zealand

Diesel locomotives

Mainline	DA (inc. DAA, DAR) DB (inc. DBR) DC (inc. DCP) DF (English Electric) DF (General Motors) inc. DFT, DFB, DFM DG (inc. DH of 1956) DI DJ DL DM (on order) DQ and QR DX (inc. DXB, DXC, DXR)
Shunt	DE DH of 1978 DS DSA DSB DSC DSG DSJ TR

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

Diesel multiple units

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 Red Terror railcar Midland railcar Leyland experimental petrol railcar McEwan Pratt petrol railcar Model T Ford railcar Sentinel-Cammell steam railcar Silver Fern railcar Standard railcar Thomas Transmission railcar Vulcan railcar Wairarapa railcar Westinghouse railcar
Others	A 88 Buckhurst petrol carriage