LB&SCR I2 class
Encyclopedia
The LB&SCR I2 class was a class of 4-4-2
steam
tank locomotive
s designed by D. E. Marsh
for suburban passenger service on the London, Brighton and South Coast Railway
. The I4 class were of the same design but incorporated a superheated
boiler.
, Douglas Earle Marsh sought to remedy some of the faults with a new design of 4-4-2T with a longer wheelbase, larger boiler and detailed changes to the front end. In the original order, five of the locomotives would incorporate a superheated
boiler, to be supplied by the North British Locomotive Company
, and the remainder traditional saturated steam boilers from Brighton Works
. In the event, the superheated boilers were delayed in construction and so all ten I2 locomotives had traditional boilers. When the superheated boilers eventually arrived they were used for five further locomotives of the same design, but which were classified I4.
Unfortunately the modifications in these designs did not address the fundamental problems with the I1 class
, which was a firebox that was far too small. As a result the two classes had relatively short lives working lightly loaded secondary services, and the Stroudley
D1 class
, and Billinton D1 class
, which they had been designed to replace, continued working.
, which acquired the locomotives in 1923, initially numbered them B11-B20, B31-35 and later 2011-2020, 2031-2035.
where they survived until at least 1947. At Longmoor, they were numbered 2400 and 2401 respectively. These numbers were later changed to 72400 and 72401. None of the class has been preserved. The I4 class were withdrawn between 1936 and 1940. No examples of either class have been preserved.
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...
. The I4 class were of the same design but incorporated a superheated
Superheating
In physics, superheating is the phenomenon in which a liquid is heated to a temperature higher than its boiling point, without boiling...
boiler.
History
In 1907, following the failure of his I1 classLB&SCR I1 class
The LB&SCR I1 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:...
, Douglas Earle Marsh sought to remedy some of the faults with a new design of 4-4-2T with a longer wheelbase, larger boiler and detailed changes to the front end. In the original order, five of the locomotives would incorporate a superheated
Superheating
In physics, superheating is the phenomenon in which a liquid is heated to a temperature higher than its boiling point, without boiling...
boiler, to be supplied by the North British Locomotive Company
North British Locomotive Company
The North British Locomotive Company was created in 1903 through the merger of three Glasgow locomotive manufacturing companies; Sharp Stewart and Company , Neilson, Reid and Company and Dübs and Company , creating the largest locomotive manufacturing company in Europe.Its main factories were...
, and the remainder traditional saturated steam boilers from 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...
. In the event, the superheated boilers were delayed in construction and so all ten I2 locomotives had traditional boilers. When the superheated boilers eventually arrived they were used for five further locomotives of the same design, but which were classified I4.
Unfortunately the modifications in these designs did not address the fundamental problems with the I1 class
LB&SCR I1 class
The LB&SCR I1 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:...
, which was a firebox that was far too small. As a result the two classes had relatively short lives working lightly loaded secondary services, and the Stroudley
William Stroudley
William Stroudley was one of Britain's most famous steam locomotive engineers of the nineteenth century, working principally for the London, Brighton and South Coast Railway...
D1 class
LB&SCR D1 class
The LB&SCR D1 class were powerful 0-4-2 suburban passenger tank locomotives, designed by William Stroudley of the London Brighton and South Coast Railway in 1873. They were originally known as "D-tanks" but later reclassified as class D1...
, and Billinton D1 class
LB&SCR E4 Class
The London, Brighton and South Coast Railway E4 Class is a class of 0-6-2Tside tank steam locomotive designed by Robert Billinton. They were introduced in 1897 and were essentially a larger version of the E3 Class...
, which they had been designed to replace, continued working.
Numbering
LB&SCR numbers were 11-20 and 31-35. The Southern RailwaySouthern 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...
, which acquired the locomotives in 1923, initially numbered them B11-B20, B31-35 and later 2011-2020, 2031-2035.
Withdrawal
All the I2 were withdrawn between 1933 and 1939 but two locomotives, numbers 2013 and 2019, saw further service on the Longmoor Military RailwayLongmoor Military Railway
The Longmoor Military Railway was a British military railway in Hampshire, built by the Royal Engineers from 1903 in order to train soldiers on railway construction and operations.-Route:...
where they survived until at least 1947. At Longmoor, they were numbered 2400 and 2401 respectively. These numbers were later changed to 72400 and 72401. None of the class has been preserved. The I4 class were withdrawn between 1936 and 1940. No examples of either class have been preserved.
Locomotive Summary
| LB&SC Number | Built | S.R. Number | Withdrawal | Notes |
|---|---|---|---|---|
| 11 | 2011 | I2 | ||
| 12 | 2012 | I2 | ||
| 13 | 2013 | I2, became W.D. 72400 Earl Roberts | ||
| 14 | 2014 | I2 | ||
| 15 | 2015 | I2 | ||
| 16 | 2016 | I2 | ||
| 17 | 2017 | I2 | ||
| 18 | 2018 | I2 | ||
| 19 | 2019 | I2, became W.D. 72401 | ||
| 20 | 2020 | I2 | ||
| 31 | 2031 | I4 | ||
| 32 | 2032 | I4 | ||
| 33 | 2033 | I4 | ||
| 34 | 2034 | I4 | ||
| 35 | 2035 | I4 |