# NZR O class

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Class of steam locomotives in New Zealand

NZR O class O Class 2-8-0 steam locomotive NZR number 99 Type and origin Power type Steam Builder Baldwin Locomotive Works Serial number 7565–7569, 7572 (not in engine number order) Build date 1885 Specifications Configuration: ​ • Whyte 2-8-0 Gauge 3 ft 6 in (1,067 mm) Driver dia. 36.25 in (0.921 m) Length 46 ft 3 in (14.10 m) Adhesive weight 25.2 long tons (25.6 tonnes; 28.2 short tons) Total weight 45.5 long tons (46.2 t; 51.0 short tons) Firebox: ​ • Grate area 15.2 sq ft (1.41 m2) Boiler pressure 130 lbf/in2 (896 kPa) Heating surface 908 sq ft (84.4 m2) Cylinders Two, outside Cylinder size 15 in × 18 in (381 mm × 457 mm) Performance figures Tractive effort 10,055 lbf (44.73 kN) Career Operators New Zealand Government Railways Number in class 6 Numbers 31, 54, 59, 98-100 Retired May 1922

The **NZR O class** consisted of six [steam locomotives](/source/Locomotive#Steam) that operated on [New Zealand](/source/New_Zealand)'s [national rail network](/source/Rail_transport_in_New_Zealand). Ordered from the [Baldwin Locomotive Works](/source/Baldwin_Locomotive_Works) of [Pennsylvania](/source/Pennsylvania) in 1885, three arrived in time to begin work in December 1885, while two more were placed in service in January 1886, and the sixth in February 1886. After almost four decades of service, all six were withdrawn in May 1922. None survived to be preserved, although two engine frames and 5 tenders from O-class locomotives are known to exist near Summit on the former [Rimutaka Incline](/source/Rimutaka_Incline).[1]

The Baldwin and Rogers locomotives reflected the styling adopted in the 1870s by American builders with elements from the [Renaissance Revival](/source/Renaissance_Revival) and [Neo Baroque](/source/Neo_Baroque) architectural styles, and Islamic, e.g. Moorish (from Alhambra) influences. Bold colours and painted decorations were used. Many Baldwin locomotives were in Olive Green ground colour, although the Baldwin N and O classes of the 1880s had Tuscan Red ground colour.[2]

## External links

- [Baldwin Steam Trust statistics on the O class](http://www.baldwin-steam.org.nz/loco/classes.html)

- [Plan of an O class locomotive by Derek Brown](http://nzrplans.orcon.net.nz/images/O.jpg)

## References

### Citations

1. **[^](#cite_ref-FOOTNOTEPalmerStewart196556_1-0)** [Palmer & Stewart 1965](#CITEREFPalmerStewart1965), p. 56.

1. **[^](#cite_ref-2)** *New Zealand's Early American Locomotives: The Design, Art and Architecture of the K, T and O Class Locomotives Part 2* by David Fletcher: "New Zealand Railfan", March 2015 pages 33-49: Volume 21 No 2

### 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).

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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