|At the time of the grouping there were twelve ex-SECR Maunsell N class locomotives in service, with the thirteenth, A822, being built at Ashford in 1923 with a number of modifications, hence the classification 'N1'. In place of the two cylinders of the N class, the N1 class had three, two outside cylinders with Walschaerts valve gear and an inside cylinder with Holcroft valve gear. The basic appearence was very similar with the main give-away being a slab-fronted section above the buffer beam, which did nothing to enhance the lines of the locomotive, and slightly smaller outside cylinders - almost undetectable to the eye.|
|First in class Nº31822 at Feltham, date unknown.
photograph: Mike Morant collection
|A822 was sent to Bricklayers Arms where the N1's
performance could be compared with the two cylinder N class, and was found to
be no real improvement. The main benefit that it did have was, through having
smaller outside cylinders, the ability to work the Hastings line with its
restricted width tunnels. Largely due to this additional route availability
Maunsell decided in 1930 to build five more, but this time using Walschaerts
valve gear on all three cylinders and, in line with these five, modifed A822 to
the same specification. Low smoke deflectors were subsequently fitted, as with
the N class locomotives. They rode well which made them useful for working
summer Saturday relief trains to the Kent coast in the days before
electrification. Following this electrification the class moved en bloc to
Tonbridge where they worked through to Redhill and onto the Brighton line and
other parts of the Central Section.
Bulleid made some minor alterations to them, removing the snifting valves and fitting U1 chimneys to the five 1930-built engines.
|Nº31876 in the scrap line at Brighton in August 1963, some nine months after withdrawal.
Note the much deeper buffer beam when compared with the N Class.
photograph by John Bradbeer
|First SR Number||Final SR Number||BR Number||Built||Withdrawn|
|A822||1822||31822||Mar 1923||Nov 1962|
|A876||1876||31876||Mar 1930||Nov 1962|
|A877||1877||31877||Apr 1930||Nov 1962|
|A878||1878||31878||Apr 1930||Nov 1962|
|A879||1879||31879||Apr 1930||Nov 1962|
|A880||1880||31880||Nov 1930||Nov 1962|
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This page was last updated 28 May 2011