# NZR OC class

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New Zealand steam locomotive

NZR OC class OC 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 **OC class**, built by the [Baldwin Locomotive Works](/source/Baldwin_Locomotive_Works) for the [Wellington and Manawatu Railway](/source/Wellington_and_Manawatu_Railway) (WMR) in [New Zealand](/source/New_Zealand), consists of a solitary [steam locomotive](/source/Locomotive#Steam). Ordered in 1896 as an externally similar but more powerful version of the [OA class](/source/NZR_Oa_class) locomotive ordered in 1894, it entered service in June 1897 as No. 16. It was a [Vauclain](/source/Vauclain_compound) [compound locomotive](/source/Compound_locomotive).[1]

In 1908, the WMR and its locomotive fleet was purchased by the [New Zealand Railways Department](/source/New_Zealand_Railways_Department) (NZR) and incorporated into the [national rail network](/source/Rail_transport_in_New_Zealand), and although No. 16 bore a likeness to members of the [O class](/source/NZR_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 OA 457, and it became OC 458. It is known to have operated on the line from the [Hutt Valley](/source/Hutt_Valley) through the [Rimutaka Range](/source/Rimutaka_Range) to the western end of the [Rimutaka Incline](/source/Rimutaka_Incline), and its final depot was at Cross Creek at the eastern end of the Rimutaka Incline in the [Wairarapa](/source/Wairarapa). It was withdrawn from service in July 1930.

## Bibliography

- Millar, Sean (2011). *The NZR Steam Locomotive*. Wellington: [New Zealand Railway and Locomotive Society](/source/New_Zealand_Railway_and_Locomotive_Society). [ISBN](/source/ISBN_(identifier)) [978-0-908573-89-9](https://en.wikipedia.org/wiki/Special:BookSources/978-0-908573-89-9).

- Palmer, A. N.; Stewart, W. W. (1965). *Cavalcade of New Zealand Locomotives*. Wellington: [A H. & A W. Reed](/source/Reed_Publishing). [ISBN](/source/ISBN_(identifier)) [978-0-207-94500-7](https://en.wikipedia.org/wiki/Special:BookSources/978-0-207-94500-7).

- Stewart, W. W. (1974). *When Steam was King*. Wellington: [A. H. & A. W. Reed Ltd](/source/Reed_Publishing). [ISBN](/source/ISBN_(identifier)) [978-0-589-00382-1](https://en.wikipedia.org/wiki/Special:BookSources/978-0-589-00382-1).

## References

1. **[^](#cite_ref-FOOTNOTEPalmerStewart196594_1-0)** [Palmer & Stewart 1965](#CITEREFPalmerStewart1965), p. 94.

## External links

- [Drawing of an OA/OC class locomotive (archived)](https://web.archive.org/web/20120722041108/http://nzrplans.orconhosting.net.nz/images/wmr7.jpg) from Derek Brown

v t e 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 DQ and QR DX (inc. DXB, DXC, DXR) Shunt DE DH of 1978 DS DSA DSB DSC DSG DSH (on order) DSJ TR Electric locomotives 1500 V DC EA (later EO of 1968) EC ED EO of 1923 EW 25 kV AC EF Battery E EB Diesel multiple units ADK/ADB class diesel multiple unit ADL/ADC class diesel multiple unit Electric multiple units 1500 V DC (Wellington) "English Electric" DM (inc. D trailers) "Ganz Mavag" EM (inc. ET trailers) "Matangi" FP (inc. FT trailers) "Tūhono" BEMU (on order) 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 Steam locomotives A of 1873 A of 1906 (inc. AD) AA AB B of 1874 B of 1899 BA BB BC C of 1873 C of 1930 D of 1874 D of 1929 E of 1872 & 1875 E of 1906 F FA (inc. FB) G of 1874 G Garratt of 1928 (inc. Pacific rebuild) H J of 1874 J of 1939 JA JB K of 1877 K of 1932 KA KB L LA M N NA NC O OA OB OC P of 1876 P of 1885 Q of 1878 Q of 1901 R S T U UA UB UC UD V W WA WAB WB WD WE WF WG WH WJ WS WW X Y Locomotive hauled carriages 50-foot carriage 56-foot carriage AC class (Grassgrubs) ex-British Rail Mark 2 carriage AK carriage FM class guards van SX carriages Track evaluation, cranes, and maintenance ETM class track evaluation car EL class rail cranes ETM class rail maintenance equipment Locomotives of New Zealand Rail transport in New Zealand Railway preservation in New Zealand.

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Adapted from the Wikipedia article [NZR OC class](https://en.wikipedia.org/wiki/NZR_OC_class) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/NZR_OC_class?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.