The War Department (WD) "Austerity" 2-8-0 is a type of heavy freight steam locomotive that was introduced in 1943 for war service. A total of 935 were built, making this one of the most-produced classes of British steam locomotive.
| Gauge | 4 ft 8 1⁄2 in (1,435 mm) |
|---|---|
| Driver diameter | 4 ft 8 1⁄2 in (1,435 mm) |
| Locomotive weight | 70 long tons 5 cwt (157,400 lb or 71.4 t) |
| Fuel type | Coal |
| Boiler pressure | 225 lbf/in2 (1.55 MPa) |
| Cylinders | Two, outside |
| Cylinder size | 19 in × 28 in (482.6 mm × 711.2 mm) |
The Austerity 2-8-0 was based on the LMS Class 8F, which until that point had been the government's standard design. Various modifications were made to the 8F design by R.A. Riddles in order to prioritise low cost over design life. These included a boiler of simpler construction which was parallel rather than tapered and a round-topped firebox rather than a Belpaire firebox. The firebox was made of steel rather than the rarer and more expensive copper.
The North British Locomotive Company (NBL) of Glasgow built 545 (split between their two works at Hyde Park and Queen's Park) and the Vulcan Foundry (VF) of Newton-le-Willows, Lancashire, built 390. North British also built a larger 2-10-0 version.
After the Second World War, 200 were sold to the LNER, who classified them as "Class O7" and numbered them 3000–3199. In 1948, 533 more were purchased by the British Transport Commission.
With the creation of British Railways, the 733 locomotives were renumbered into the 90000–90732 series. Only one of these, No. 90732, was named, becoming Vulcan after the Vulcan Foundry where many of the locomotives were built.
Here the one and only survivor. Vulcan Foundry works No. 5200 was repatriated from Sweden to the Keighley and Worth Valley Railway. It was SJ number 1931. It was overhauled to its original condition, finished in 2007, which involved building a new cab and tender, become BR "No. 90733". After test runs, 90733 ran its first passenger train on Monday 23 July 2007.
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