British Railway History Item
BR Class Riddles British Railways Standard Class 4 2-6-4 Tank
Built 1951-57. Designed by Robert A. Riddles.
Total Number Built 155.
Introduced 1951. Designed at Brighton. Classification 4MT.
Number Series 80000-80154.
Built at British Railway's Brighton, Derby and Doncaster Works:
80000-80009, 80054-80058 Derby
80010-80053, 80059-80105, 80116-80154 Brighton
No Lot Nos. yet available.
First outshopped from Brighton works in July 1951, 155 of these locomotives were built in Brighton, Derby and Doncaster works between then and 1957 and became general workhorses on all the regions of British Railways, except the Western. Not things of beauty with their somewhat unattractive "rear ends", they were a product of the development by British Railways of a series of twelve "Standard" locomotive designs embracing the best practices of the pre-nationalisation railways.
Designed by Robert A Riddles, British Railways' Chief Mechanical Engineer, these tanks were one of the most successful of the "Standards", doing well all that was asked of them.
The Standard 4s shared much of the basic design of the LMS Railway's Class 4 2-6-4Ts built under both Stanier and Fairburn (some of the latter locos were built at Brighton after nationalisation) but with considerable improvements. They had smaller cylinders and higher pressure boilers, were more economical in operation and were popular with footplate crews for their better running and improved cab facilities.
Classified as 4MT on the Eastern, Midland, and Scottish Regions, their Southern classification was 4P/4F. Most were to be found working on the Central and South Western sections of the Southern Region, the LTSR lines of the Eastern Region and the Glasgow commuter lines in Scotland.
When the LTSR lines were electrified many of the displaced Standard 4s were transferred in July 1962 to Shrewsbury, in the Western Region, who then lost them again to the Midland Region during the boundary changes that took effect from 1 January 1963. In the same boundary changes the Western Region was handed all of the Southern Region west of Salisbury, also inheriting the locomotives based in that area, including Standard 4Ts. However, the mainly dieselised Western Region seemed determined to send them to the scrapyards as quickly as they could either get their hands on DMUs to replace them, or close down the lines where they worked.
The first loco withdrawn was 80040 on 6 May 1964 from Exmouth Junction shed.
The last eleven locos withdrawn were 80011, 80134 and 80146 from Bournemouth shed; 80015, 80085, 80133, 80139, 80140 and 80143 from Nine Elms Shed; 80016 and 80152 from Eastleigh shed on 9 July 1967 towards the end of steam on the Southern region.
Fifteen locos are preserved - 80002, 80064, 80072, 80078, 80079, 80080, 80097, 80098, 80100, 80104, 80105, 80135, 80136, 80150 and 80151.
Motive Power Details
Weight: Loco 88 tons 10 cwt
Water Capacity: 2,000 gals
Coal Capacity: 3? tons
Driving Wheel: 5' 8"
Pony Wheels: 3 ft
Trailing Wheels: 3 ft
Boil Press: 225lb/sq in Su
Cylinders: Two 18" x 28" (outside)
Valve Gear: Walschaerts (piston valves)
TE: 25,100 lb
Length: 44 ft 9 7/8 ins
Route Availability: 5
Class Total: 155
Allocation and Withdrawal Details
Last Updated : Sunday 9th December 2012 06:38