NZR JA class
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NZR JA class

JA 1271 with excursion consist climbing the Opapa incline. Photo by Joseph Christianson
NameNZR JA class
PowertypeSteam
CaptionJA 1271 with excursion consist climbing the Opapa incline. Photo by Joseph Christianson
Builddate1946 - 1956
BuilderNZR Hillside Workshops, Dunedin (35)
North British Locomotive Works, Glasgow, Scotland (16)
Weight69.1 LT
Tenderweight40.35 LT
Locotenderweight109.45 LT
Whytetype 
Firstrundate1947 - 1956 (Hillside)
1952 (North British)
Lastrundate16 November 1971
Disposition44 scrapped
7 preserved
Numinclass51
Weightondrivers44.45 LT
Wheelbase34 ft 10 in
Boilerpressure200 psi
FeedwaterheaterNone: Fitted with Davies & Metcalfe Exhaust Injector
Gauge42al=onlk=on
Wheeldiameter54 in (1.4 m)
CylindercountTwo
Cylindersize18 x 26 in (45.7 x 66 cm )
Tractiveeffort24960 lbf (63398.4 kN)
Topspeed70 mph (112.7 km/h)
Retiredate1967 - 1971
Scrapdate1969 - 1972
LocaleAll of New Zealand
Roadnumber1240 - 1274 (Hillside)
1275 - 1290 (North British)
Length66 ft 11.5 in (107.8 1)
FueltypeCoal (Hillside)
Oil (North British)
Fuelcap6.0 LT (9.7 t) coal
1350 impgal (6137.2 L) oil
Watercap4000 impgal (18184.4 L)
Firearea39.0 sqft (3.6 m2)
Totalsurface1469 sqft (136.5 m2)
Superheaterarea283 sqft (26.3 m2)

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The NZR JA class were a type of 4-8-2 steam locomotive used on the New Zealand railway network. The class was built in two batches, with the second batch possessing some differences from the first. The first batch was built at Hillside Workshops in 1946-56 and the second batch by the North British Locomotive Works in 1951, and to distinguish between the batches, locomotives are identified by their maker.

The JA class was the last class of steam locomotive built both for and by NZR - Hillside JA 1274 was the last steam locomotive ever built by NZR, and the North British JA's were the last locomotives built overseas for the NZR.

The class had relatively short lives of between 12 and 24 years, as they succumbed to dieselisation. Nine JAs lasted until the end of steam on 26 October 1971.

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North British JA's :
Key:

North British JA's :
Number Builder Entered service Withdrawn Notes
1240 NZR Hillside format=dmy 1947, link=off format=dmy 1971, link=off Preserved by Pete Coleman, Blenheim. Sold 1988 to Ian Welch for Mainline Steam; currently under restoration.
1241 NZR Hillside format=dmy 1947, link=off format=dmy 1968, link=off
1242 NZR Hillside format=dmy 1947, link=off format=dmy 1969, link=off First Hillside JA to be built.
1243 NZR Hillside format=dmy 1947, link=off format=dmy 1968, link=off
1244 NZR Hillside format=dmy 1947, link=off format=dmy 1969, link=off
1245 NZR Hillside format=dmy 1947, link=off format=dmy 1969, link=off
1246 NZR Hillside format=dmy 1947, link=off format=dmy 1971, link=off
1247 NZR Hillside format=dmy 1948, link=off format=dmy 1969, link=off
1248 NZR Hillside format=dmy 1948, link=off format=dmy 1971, link=off
1249 NZR Hillside format=dmy 1948, link=off format=dmy 1968, link=off
1250 NZR Hillside format=dmy 1949, link=off format=dmy 1971, link=off Preserved by Phil Goldman for the Railway Enthusiasts Society and Glenbrook Vintage Railway; operational and mainline certified.
1251 NZR Hillside format=dmy 1949, link=off format=dmy 1971, link=off
1252 NZR Hillside format=dmy 1949, link=off format=dmy 1971, link=off
1253 NZR Hillside format=dmy 1949, link=off format=dmy 1971, link=off
1254 NZR Hillside format=dmy 1950, link=off format=dmy 1969, link=off
1255 NZR Hillside format=dmy 1950, link=off format=dmy 1969, link=off
1256 NZR Hillside format=dmy 1951, link=off format=dmy 1971, link=off
1257 NZR Hillside format=dmy 1951, link=off format=dmy 1971, link=off
1258 NZR Hillside format=dmy 1951, link=off format=dmy 1971, link=off
1259 NZR Hillside format=dmy 1952, link=off format=dmy 1969, link=off
1260 NZR Hillside format=dmy 1952, link=off format=dmy 1971, link=off Preserved by Plains Vintage Railway; operational but not mainline certified.
1261 NZR Hillside format=dmy 1953, link=off format=dmy 1971, link=off
1262 NZR Hillside format=dmy 1953, link=off format=dmy 1969, link=off
1263 NZR Hillside format=dmy 1954, link=off format=dmy 1969, link=off
1264 NZR Hillside format=dmy 1954, link=off format=dmy 1969, link=off
1265 NZR Hillside format=dmy 1950, link=off format=dmy 1969, link=off
1266 NZR Hillside format=dmy 1950, link=off format=dmy 1969, link=off
1267 NZR Hillside format=dmy 1950, link=off format=dmy 1971, link=off Preserved by Les Hostick & Associates, stored at Te Awamutu Railway Museum until 2008. Purchased by Ian Welch for Mainline Steam; in storage awaiting restoration.
1268 NZR Hillside format=dmy 1950, link=off format=dmy 1968, link=off
1269 NZR Hillside format=dmy 1955, link=off format=dmy 1969, link=off
1270 NZR Hillside format=dmy 1955, link=off format=dmy 1969, link=off Tender from this locomotive is stored at Mainline Steam, Parnell.
1271 NZR Hillside format=dmy 1956, link=off format=dmy 1971, link=off Preserved by Steam Incorporated; operational and mainline certified.
1272 NZR Hillside format=dmy 1956, link=off format=dmy 1968, link=off
1273 NZR Hillside format=dmy 1956, link=off format=dmy 1969, link=off
1274 NZR Hillside format=dmy 1956, link=off format=dmy 1971, link=off Last steam locomotive to be built by NZR; on static display at the Otago Settlers Museum.
1275 North British format=dmy 1952, link=off format=dmy 1968, link=off Preserved by Les Hostick and stored at Te Awamutu Railway Museum. Leased to Mainline Steam; operational and mainline certified.
1276 North British format=dmy 1952, link=off format=dmy 1968, link=off
1277 North British format=dmy 1952, link=off format=dmy 1966, link=off
1278 North British format=dmy 1952, link=off format=dmy 1968, link=off
1279 North British format=dmy 1952, link=off format=dmy 1964, link=off
1280 North British format=dmy 1952, link=off format=dmy 1967, link=off
1281 North British format=dmy 1952, link=off format=dmy 1966, link=off
1282 North British format=dmy 1952, link=off format=dmy 1967, link=off
1283 North British format=dmy 1952, link=off format=dmy 1968, link=off
1284 North British format=dmy 1952, link=off format=dmy 1967, link=off
1285 North British format=dmy 1952, link=off format=dmy 1967, link=off
1286 North British format=dmy 1952, link=off format=dmy 1967, link=off
1287 North British format=dmy 1952, link=off format=dmy 1966, link=off
1288 North British format=dmy 1952, link=off format=dmy 1966, link=off
1289 North British format=dmy 1952, link=off format=dmy 1966, link=off
1290 North British format=dmy 1952, link=off format=dmy 1966, link=off

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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