Midland Railway 483 Class
The Midland Railway 483 Class 4-4-0 was a class of steam locomotive designed by Samuel W. Johnson for passenger work on the Midland Railway. This design formed the basis for the later LMS Class 2P 4-4-0. The London, Midland and Scottish Railway (LMS) seems to have inherited three batches of these locomotives and some of them passed into British Railways (BR) ownership in 1948.
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_geograph-2602352-by-Ben-Brooksbank.jpg.webp) Rebuilt Midland Johnson 2P 4-4-0 No. 40542 at Chesterfield 1959 | |||||||||||||||||||||
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Numbering
- BR numbers 40332-40397 (17 locomotives) originally built 1882–1891, some rebuilt from 1910 onwards
- BR numbers 40400-40562 (143 locomotives) originally built 1891–1901, all rebuilt between 1912 and 1923
- BR numbers 40322-40326 (5 locomotives) built for Somerset and Dorset Joint Railway 1914-1921 and taken into LMS stock in 1930
Note: two of the above number series contain gaps so the totals do not tally.
Rebuilding
On rebuilding, the Stephenson valve gear was retained but the following changes were made:
- 18 in × 26 in (460 mm × 660 mm) cylinders with slide valves were replaced by 20.5 in × 26 in (520 mm × 660 mm) cylinders with piston valves.
- 6 ft 6.5 in (1.994 m) driving wheels were replaced by 7 ft 0.5 in (2.146 m) driving wheels.
- A superheater was fitted.
References
External links
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