The LB&SCR I1 class was a class of 4-4-2

4-4-2 (locomotive)

Under the Whyte notation for the classification of steam locomotives, 4-4-2 represents the wheel arrangement of four leading wheels on two axles , four powered and coupled driving wheels on two axles, and two trailing wheels on one axle...

 steam

Steam locomotive

A steam locomotive is a railway locomotive that produces its power through a steam engine. These locomotives are fueled by burning some combustible material, usually coal, wood or oil, to produce steam in a boiler, which drives the steam engine...

 tank locomotive

Tank locomotive

A tank locomotive or tank engine is a steam locomotive that carries its water in one or more on-board water tanks, instead of pulling it behind it in a tender. It will most likely also have some kind of bunker to hold the fuel. There are several different types of tank locomotive dependent upon...

s designed by D. E. Marsh

D. E. Marsh

Douglas Earle Marsh was the Locomotive, Carriage and Wagon Superintendent of the London, Brighton and South Coast Railway from November 1904 until his early retirement on health grounds in July 1911.-Early career:...

 for suburban passenger service on the London, Brighton and South Coast Railway

London, Brighton and South Coast Railway

The London, Brighton and South Coast Railway was a railway company in the United Kingdom from 1846 to 1922. Its territory formed a rough triangle, with London at its apex, practically the whole coastline of Sussex as its base, and a large part of Surrey...

.

History

This class was intended to haul secondary passenger trains, especially in the south London

London

London is the capital city of :England and the :United Kingdom, the largest metropolitan area in the United Kingdom, and the largest urban zone in the European Union by most measures. Located on the River Thames, London has been a major settlement for two millennia, its history going back to its...

 suburbs, and twenty locomotives were constructed by Brighton works

Brighton railway works

Brighton railway works was one of the earliest railway-owned locomotive repair works, founded in 1840 by the London and Brighton Railway in Brighton, England, and thus pre-dating the more famous railway works at Crewe, Doncaster and Swindon...

 between June 1906 and December 1907. The locomotives proved to be reliable but with disappointing performance in their original form, being poor steamers, but all of them passed to the Southern Railway

Southern Railway (Great Britain)

The Southern Railway was a British railway company established in the 1923 Grouping. It linked London with the Channel ports, South West England, South coast resorts and Kent...

 in 1923.

I1X class

Between 1925 and 1932 they were rebuilt by Richard Maunsell

Richard Maunsell

Richard Edward Lloyd Maunsell held the post of Chief Mechanical Engineer of the South Eastern and Chatham Railway from 1913 until the 1923 Grouping and then the post of CME of the Southern Railway in England until 1937....

 with spare boilers left over after the reuilding of the B4

LB&SCR B4 Class

The B4 class were 4-4-0 steam locomotives for express passenger work on the London, Brighton and South Coast Railway. They were designed by R. J. Billinton and were either built at Brighton works 1899–1902 or else by Messrs Sharp, Stewart and Company in 1901. Twelve members of the class were...

 and I3

LB&SCR I3 class

The LB&SCR I3 class was a class of 4-4-2 steam tank locomotives designed by D. E. Marsh for suburban passenger service on the London, Brighton and South Coast Railway.-History:...

 classes. The rebuilt engines were designated I1x class, and these new larger boilders greatly improved their performance.

Withdrawals

Two worn-out members of the class were withdrawn by the Southern Railway in 1944 and 1946 respectively, but the remainder survived into British Railways (BR) ownership in 1948, although all had been withdrawn by July 1951 and none has been preserved.

Numbering

The first ten were numbered 595-604 and the second ten were numbered 1-10. The Southern Railway initially added a "B" prefix to these numbers and later renumbered them 2595-2604 and 2001-2010. BR added 30000 to the numbers but it is believed that only 32005 actually carried its number.

Sources

• Dendy Marshall, C. F., History of the Southern Railway, Ian Allan 1988, page 270, ISBN 0 7110 0059 X