NZR Q class (1901)
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NZR Q class (1901)

A NZR Q class locomotive
NameNZR Q class
PowertypeSteam
CaptionA NZR Q class locomotive
BuilderBaldwin Locomotive Works, Philadelphia, USA
Serialnumber19202 � 19207
19248 � 19254
Builddate1901
Whytetype 
Gauge42al=onlk=on
Driversize49.1 in (1.2 m)
Wheelbase48 ft 4 in (1.2 2)
Length55 ft 4 in (1.4 2)
Weightondrivers30.7 LT (0.8 t)
Weight48.0 LT (1.2 t)
Tenderweight24.1 LT (0.6 t)
Locotenderweight72.1 LT (1.8 t)
FueltypeCoal
Fuelcap5.0 LT (0.1 t)
Watercap1700 impgal (7728.4 L)
CylindercountTwo
Cylindersize16 x 22 in (40.6 x 55.9 cm )
Firearea40 sqft (3.7 m2)
Boilerpressure200 psi (18.6 kPa)
Tractiveeffort18340 lbf (1703.8 kN)
LocobrakesSteam
TrainbrakesVacuum
Roadnumber338-350
Firstrundate1901-12-24
Retiredate1957-12-07
Numinclass13
LocaleAuckland - Rotorua
Oamaru - Dunedin
DispositionAll scrapped

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The NZR Q class was an important steam locomotive not only in the history of New Zealand's railway network but also in worldwide railways in general. Designed by New Zealand Government Railways' Chief Mechanical Engineer A. L. Beattie and ordered from the Baldwin Locomotive Works in 1901, they were the first locomotives in the world to be built with the wheel arrangement of 4-6-2. This wheel arrangement came to be known as the Pacific type after the voyage the completed locomotives had to make across the Pacific Ocean to New Zealand. A few instances of the 4-6-2 wheel arrangement are known to have existed prior to 1901, but these were all reconstructions of locomotives that were originally built with a different wheel arrangement, thereby making the thirteen members of the Q class the first "true" Pacifics in the world. The Pacific style went on to become arguably the most famous wheel arrangement in the world.

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Rail vehicles of New Zealand

Battery electric locomotivesE - EB
Diesel locomotivesDA (inc. DAA, DAR) - DB (inc. DBR) - DC (inc. DCP) - DE - DF (English Electric) - DF (General Motors) inc. DFT - DG (inc. DH of 1956) - DH of 1978 - DI - DJ - DL - DQ (inc. QR) - DS - DSA - DSB - DSC - DSG - DSJ - DX (inc. DXB, DXC and DXR) - TR
Diesel Multiple UnitsADK (inc. ADB trailers) - ADL (inc. ADC trailers)
Electric locomotivesEA (later EO of 1968) - EC - ED - EF - EO of 1923 - EW
Electric Multiple UnitsDM (inc. D trailers) - EM (inc. ET trailers) - "Matangi" FP (inc. FT trailers)
RailcarsRM class railcars: 88 seater (also known as Fiats or twinsets) - Clayton steam railcar - Edison battery-electric railcar - Leyland diesel railbus - Leyland experimental petrol railcar - MacEwan-Pratt petrol railcar - Model T Ford railcar - Sentinel-Cammell steam railcar - Silver Fern - Standard - Thomas Transmission - Vulcan - Wairarapa - Westinghouse

Non-RM class railcar: A 88 Buckhurst petrol carriage

Steam locomotivesA 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 1872-75 - 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 (inc. WS) - WB - WD - WE - WF - WG - WH - WJ - WW - X - Y
Locomotive hauled carriages50-foot carriage - 56-foot carriage - ex-British Rail Mark 2 carriage- AK carriage - FM class guards van
See also: Locomotives of New Zealand; Motive power explanation; Multiple units and Railcars descriptions.



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