Manufacturer catalogue image
Era 4 (1948 to 1956) British Railways Early Crest
The third of Robert Urie's 4-6-0 designs for the LSWR and similar in appearance to the N15 class, the S15 shared many of its two predecessor's components, such as in the boiler, cylinder, valve gear and tender designs. The only major difference in design for the S15 came in the smaller diameter of the driving wheels, this gave better traction, which was essential for the S15's anticipated heavy freight workings to the south coast ports.
By May 1921, sixteen engines had entered service, mostly in the London area, but the 1923 Grouping of Railway Companies coincided with Urie's retirement and further orders of the S15 were delayed as the new CME, Richard Maunsell, sought to improve the design, establishing trials to analyze water/coal consumption of the engines, along with their ability to run to a precise schedule. When these trials showed that the S15 was the best available all-round freight locomotive, Maunsell ordered a further fifteen locomotives from the workshops at Eastleigh, the finished locomotives emerging throughout 1927 and 1928.
Maunsell's modifications to the S15 included increasing the boiler pressure and the reduction of the cylinder bore. The footplate was also modified and featured the Ashford style cab, constructed entirely from steel, as previously fitted to LBSCR locomotives. The roof was flush with the cab sides and variants of this became standard for all new Southern Railway locomotives and converted tank engines. Other modifications included lengthening the valve travel and fitting larger outside steam pipes to streamline the flow of steam into the cylinders.
A third batch, ordered in 1931, coincided with a downturn in the volume of freight owing to the economic depression which meant that the last of the S15 class was not completed until 1936. These showed some weight saving modifications, as well as the application of smoke deflectors to improve visibility from the footplate when travelling at speed. The S15 proved to be an adaptable class and were capable of putting up a creditable performance when pressed into passenger service during peak holiday periods. They just outlived the N15 class, the first withdrawals coming in 1962, the last being in 1966.
Locomotive 30842 was one of the last batch of S15s, being built at Eastleigh works during August 1936 and spent alternating periods at 70B Feltham shed and 70D Eastleigh shed before disposal in November 1965.
* Class names often change over the lifespan of a locomotive, so this is not necessarily the class name used by the operator in the period modelled.
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OO Gauge Hornby R3412 Late BR S15 Class 30842
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Hornby R3412 OO Gauge SR S15 4-6-0 30842 BR Black Early Crest
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Hornby R3412 BR, Maunsell S15 Class, 4-6-0, 30842, Early BR - Era 4
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