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British Railway Steam Locomotive

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Please read this statement on the accuracy of the data shown below

Note: To Obtain Consistency in the Steam System, Shed Codes used are those Registered at Nationalisation on 1st January 1948
Number32003 a
2nd Grouping Number
1st Grouping Numbersr 2003
2nd Pre Grouping Number
1st Pre Grouping Numberlbsc 3
Works/Lot Number
Class CodeI1X
DesignerMarsh DE
Designation4-4-2T
Built31/07/1907
BuilderBrighton Works (SR/British Railways)
1948 Shed75F Tunbridge Wells West
Last Shed75G Eastbourne
Withdrawn31/07/1948
Disposal detailsEastleigh Works (B.R.)
DisposalCut Up
Disposal Date30/09/1948
NotesRebuilt as Class I1X Sep 1931. BR No. allocated but not worn

Class Information

The LB&SCR I1 class was a class of 4-4-2 steam tank locomotives designed by Douglas Earle Marsh for suburban passenger service on the London, Brighton and South Coast Railway.

Marsh was noted for several things, one being the exercising of GNR influence when he arrived at Brighton and another being the builder of many disappointing engines. Unlike his H1 and H2 Atlantic express tender engines his Atlantic tanks (with the exception of the I3 class) were pretty much a poor bunch. The first of these to be built was Nş595 in September 1906 and although followed by nineteen more locos of class I1, 595 differed in several ways from the following engines. She had, for example, copper feedwater heating pipes along and down to the tanks in the manner of the GNR condensing engines. The first three locos had a water capacity of 1,839 gals whereas the last seventeen carried 1,924, and in true Brighton tradition the last locos to be built carried lower numbers than the first, in this case the very lowest - numbers 1 to 10. These last ten used the coupled wheels and motion from recently scrapped Stroudley D1 and D2 class engines, reducing their wheelbase from 8 ft 9 ins to 7 ft 7 ins.

All twenty engines steamed very badly which is far from ideal in a loco built for heavy suburban traffic! In their early years their main feat was to show what good engines the D1 and E4 classes were! In 1921 Lawson Billinton fitted taller chimneys which improved the situation a little, but not by much.

This class was intended to haul secondary passenger trains, especially in the south London suburbs, and twenty locomotives were constructed by Brighton works 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 in 1923.

I1X class

Come the Southern Railway and the Maunsell era and at long last something worthwhile was made of the locos when they were rebuilt between 1923 and 1932 into class I1x by Richard Maunsell using spare boilers left over after the reuilding of the B4 and I3 classes. Maunsell gave them boilers from the B4 Class or unsuperheated ones from the I3 class. The rebuilt engines were designated I1x class, and these new larger boilders greatly improved their performance. It has been suggested that they would also have benefitted from having piston valves but Maunsell didn't fit these. Following the rebuild the locos were considerably more useful and did sterling work on the Oxted line.

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.

Two worn-out members of the class were withdrawn by the Southern Railway in 1944 and 1946 respectively, but a handful survived into British Railways (BR) ownership in 1948. All had been withdrawn by July 1951.

The first loco withdrawn was 2600 in October 1944 with badly fractured frames.
The first BR loco withdrawn was 32601 in January 1948 from Three Bridges shed.
The last loco withdrawn was 32002 in July 1951 from Brighton shed.
None are preserved.

Technical Detail

Designer : Douglas Earle Marsh/Richard Maunsell
Introduced : 1906
Builder : Brighton Works
Build date : 1906–1907
Total produced : 20 - Total to BR 18
Rebuild date : 1925–1932
Configuration : 4-4-2T
Gauge : 4 ft 8½ in (1,435 mm)
Driver wheel diameter : 5 ft 6 in (1.676 m)
Trailing Wheel diameter : 4 ft
Locomotive weight : 66 tons 10 cwt (149,000 lb/67.6 t)
Fuel type : Coal
Water capacity : Nos. 595-7 1,839 imp gallons (8,360 l; 2,209 US gal); Nos. 839/598-10 1,924 imp gallons (8,750 l; 2,311 US gal)
Boiler pressure : 170 lb sq in (1.17 MPa)
Cylinders : Two (inside)
Cylinder size : 17½ in × 26 in (445 mm × 660 mm)
Valve Gear : Stephenson (slide valves)
Tractive effort : 17,430 lbs (77.5 kN)
Withdrawn : 1944–1951

Introduced 1925. Maunsell rebuild with 13 Class non superheated boiler of Marsh LBSCR II Class.
(a) 32001-32010 Introduced 1929. Maunsell rebuild of later Class I1 locos with shorter coupled wheelbase.

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