NZR J class (1939)

J 1211 being serviced before departure from Napier. Photo by Joseph Christianson

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The NZR J class steam locomotives were a class of locomotive used in New Zealand. Following the success of the K class on NZR main lines, there was an urgent need for a modern, powerful locomotive capable of running over secondary lines laid with lighter rails. Thus a new "Mountain" 4-8-2 type locomotive was designed and classified by NZGR as the new class J. The 40 locomotives were all built by North British Locomotive Works, Scotland. They should not be confused with the members of 1874's J class, the first tender locomotives to operate in New Zealand.

The class had a notable appearance with the boiler being partly streamlined after the style of the New Haven Railroad's J400 class, and was also similar to the Norfolk and Western Railway class J and the NSWGR 38 class. The J class incorporated all the latest ideas of the K^A class but a noteworthy departure was the use of the Baker valve gear. The tender was of the Vanderbilt type.

Twelve J class locomotives were converted to oil burning and reclassified as J^B class, and the bullet nose streamlining was gradually removed.

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Rail vehicles of New Zealand

Battery electric locomotives		E - EB
Diesel locomotives		DA (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 Units		ADK (inc. ADB trailers) - ADL (inc. ADC trailers)
Electric locomotives		EA (later EO of 1968) - EC - ED - EF - EO of 1923 - EW
Electric Multiple Units		DM (inc. D trailers) - EM (inc. ET trailers) - "Matangi" FP (inc. FT trailers)
Railcars		RM 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 locomotives		A of 1873 - A of 1906 (inc. Ad) - 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 1872-75 - 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 (inc. W^S) - W^B - W^D - W^E - W^F - W^G - W^H - W^J - W^W - X - Y
Locomotive hauled carriages		50-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.