NZR WH class

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NZR WH class
Type and origin
Power type Steam
Builder Manning Wardle, Leeds, England
Serial number 920 to 924
Build date 1884
Total produced 5
Specifications
Configuration 2-6-2T
Gauge 3 ft 6 in (1,067 mm)
Wheel diameter 37 inches (940 mm)
Weight on drivers 23.9 long tons (24.3 t; 26.8 short tons)
Locomotive weight 32.9 long tons (33.4 t; 36.8 short tons)
Fuel type Coal
Boiler pressure 140 psi (965 kPa)
Firegrate area 12 sq ft (1.1 m2)
Heating surface:
– Total
687 sq ft (63.8 m2)
Cylinders 2
Cylinder size 12 in × 18 in (305 mm × 457 mm)
Performance figures
Tractive effort 7,850 lbf (34.9 kN)
Career
Operator(s) Wellington and Manawatu Railway, New Zealand Government Railways
Locale Wellington - Manawatu Line
Disposition Withdrawn

The NZR WH class was a class of three steam locomotives built by Manning Wardle built for service on New Zealand's private Wellington and Manawatu Railway (WMR). They did not acquire their WH classification until 1908 when the publicly owned New Zealand Railways Department (NZR) purchased the WMR and its locomotive fleet. Two of the five locomotives purchased by the WMR in 1884 had previously been sold.

The first locomotives purchased by the WMR were five 2-6-2T light tank locomotives, to be used for construction work and then for local traffic. The WMR engineer in charge of construction Harry Higginson sent his requirements to the WMR’s agent in London Sir Julius Vogel in 1883. Mr Bromley drew up detailed drawings and specifications, and a tender was awarded in January 1884 to Manning Wardle of Leeds, England. The first locomotive was tested at Leeds by Mr Bromley, who was killed in a railway accident at Bulhouse while returning to London. No. 1 & 2 arrived at Wellington on the SS Aorangi on 15 September, and Nos. 4 & 5 on the SS Ionic arrived on 28 January 1885. No. 1 was tested at the Petone NZR workshops, and found to have tight bearings, with Higginson rebutting rumours printed in the Evening Post that it was of unsatisfactory design and manufacture. Their centre drivers were flangeless; and the smokeboxes were too short (possibly because of the coal used) so were extended within a couple of years. The extension improved their performance, if not their appearance. The first engine was eagerly awaited in September 1884, as the formation to Johnsonville was ready for tracklaying and ballasting, but the WMR had unsuccessfully tried to hire a locomotive from the Government in August 1884. The last two were shipped to Wanganui after erection at Wellington to provide much-needed motive power at the isolated Longburn end.[1]

These engines were expected to haul 70 tons up the 1 in 40 grade to Johnsonville; and two in tandem could be used to Johnsonville, with only one proceeding to Paekakariki. For the easier run to Longburn a faster tender locomotive was required, and three engines similar to the NZR V class were ordered in 1883. The tank engines were averaging about 24,000 miles each in 1887-88 but about 17,000 miles each in 1889. By 1892, half of the running of Nos. 2, 3 & 5 was for track maintenance work (some 25,000 miles) and half for shunting and Wellington-Paekakariki banking. No. 5 required repairs in 1887-88 and 1892.[2]

Two locos: WMR Nos. 3 and 5 (Manning Wardle Nos. 922 and 924), were sold to the Timaru Harbour Board in 1901. Later, one was sold to the Mount Somers Tramway in the 1930s, and the other scrapped.[3] No. 5 was sold for £1000, and arrived in Timaru on 26 February 1901. No. 3 was reassembled at Addington, and reached Timaru on 22 April 1901. They were written off at the end of the 1900-01 financial year (No. 5) and in the 1901-02 financial year (No. 3).[4] The mileage to 29/2/1908 (but presumably only for WMR service) is given as 219,999 miles (No. 3) and 211,602 miles (No. 5).[5]

Three locos: WMR Nos. 1, 2 and 4 (Manning Wardle Nos. 920, 921, and 923) were taken over by the NZR in 1908, and classified as NZR WH class. The NZR numbers were Nos. 447 (305,825 miles), 448 (319,724 miles), and 449 (346,162 miles) respectively; with the WMR mileage to 29 February 1908 given in brackets.[6]

They were sold after being written off as follows:[7]

  • No 447 (WMR No. 1) written off 12/1/27; sold to Collett and Co, Dannevirke; by 1945 not used (and) there derelict.
  • No 448 (WMR No. 2) written off 11/12/26; sold to Mangawhero Timber Co Raetihi (1926-1927). Then in private service with Challenge Phosphate Co Ltd. Otahuhu to 1943.
  • No 449 (WMR No. 4) written off 15/8/14; sold to Waipa Railway and Coal Co, Ngaruawahia, in private service 1914-1933.

References[edit]

  1. ^ Cassells page 34-38
  2. ^ Cassells page 55,57,76
  3. ^ Lloyd page 125
  4. ^ Cassells page 100
  5. ^ Cassells page 156
  6. ^ Cassells page 156
  7. ^ Lloyd page 62,125
  • Cassells, K.R. Uncommon Carrier: The History of the Wellington and Manawatu Railway Company, 1882-1908 (Wellington, NZRLS, 1994, ISBN 0-908573-63-4 )
  • Lloyd, W.G. Register of New Zealand Railways Steam Locomotives, 1863-1971 (Wellington, NZRLS, 1974)
  • W.W.Stewart, When Steam Was King, REED, 1970

External links[edit]