SEmG

Marsh I1/Maunsell I1x Class 4-4-2T

600

photograph: Dave Searle collection

I1 Nº600 in LB&SCR livery on Royal train duty at Belmont whilst heading for Epsom races.

 
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 Nº595 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!
 
601 I1 Nº601 in LBSC livery, location unknown.

photograph: Dave Searle collection

 
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.

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. Maunsell gave them boilers from the B4 Class or unsuperheated ones from the I3 class. 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. A handful survived into BR ownership, though only one carried a BR number, and all had gone by July 1951.

 
Still an I1, NºB7 photographed at London Bridge station during early Southern Railway days.

photograph: Mike Morant collection

B290
 
2010 I1x Nº2010 was photographed fully coaled and ready to go at Tunbridge Wells West during the 1930s. Note the changes to the cab and bunker.

photograph: Mike Morant collection

 
The first I1 to be built, but not the first to be rebuilt as Class I1x, Nº2595 is seen here at an unknown location in later Southern Railway days.

photograph: Mike Morant collection

2595
 
2602 I1x Nº2602 was photographed here at Bognor loco shed on 27th May 1950.

photograph by Les Darbyshire

 

Technical Details

Introduced:
Driving Wheel:
Trailing Wheel:
Weight:
Cylinders (2):
Boiler Pressure:
Water Capacity:
Tractive Effort:

I1

1906
5 ft 6 ins
4 ft
66½ tons (Approx)
17½ in x 26 in
170 lb sq in
595-7 1,839/598-10 1,924 galls
17,430 lbs

I1x

1925
5 ft 6 ins
4 ft
66½ tons (Approx)
17½ in x 26 in
170 lb sq in
595-7 1,839/598-10 1,924 galls
17,430 lbs
 
LBSC Nº SR Nº # BR Nº Built Rebuilt as I1x Withdrawn
595
596
597
598
599
600
601
602
603
604
1
2
3
4
5
6
7
8
9
10
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
-
-
-
-
-
-
-
-
-
-
-
-
-
-
32005
-
-
-
-
-
Sep 1906
Nov 1906
Dec 1906
Jan 1907
Feb 1907
Mar 1907
Apr 1907
Apr 1907
Jun 1907
Apr 1907
Jun 1907
Jul 1907
Jul 1907
Aug 1907
Sep 1907
Oct 1907
Oct 1907
Nov 1907
Dec 1907
Dec 1907
Jan 1927
Jul 1925
May 1928
Nov 1925
Oct 1928
May 1927
Feb 1928
Dec 1926
Aug 1928
Aug 1927
Dec 1931
May 1931
Sep 1931
Jan 1932
Aug 1931
Feb 1932
Oct 1931
Feb 1931
Dec 1929
Oct 1929
Jun 1951
Jun 1951
Dec 1946
Sep 1948
Sep 1948
Oct 1944
Jan 1948
Jun 1951
Apr 1951
Sep 1948
Jul 1948
Jul 1951
Jul 1948
Nov 1948
Jun 1951
Sep 1948
Sep 1948
Jun 1951
Apr 1951
Sep 1948
# Between 1923 and 1928 SR numbers were the LBSC numbers with the added prefix 'B'

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This page was last updated 12 September 2010

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