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LB&SCR L class
The LB&SCR L Class was a class of 4-6-4 steam tank locomotives designed by L. B. Billinton for the London, Brighton and South Coast Railway. They were known as the "Brighton Baltics", ''Baltic'' being the European name for the 4-6-4 wheel arrangement. Seven examples were built between April 1914 and April 1922 and they were used for express passenger services.
==Background==
By 1913 the LB&SCR was well supplied with modern passenger locomotives except for the heaviest express trains. L. B. Billinton was undecided whether to enlarge the J1 and J2 4-6-2 tank locomotives designed by his predecessor D. E. Marsh, or design an equivalent sized 4-6-0 tender locomotive. Large tank locomotives were well-suited to the operating conditions of the railway with relatively short distances but very intensive use of the system, particularly in the vicinity of London. Billinton therefore placed an order for one 4-6-4 tank and one 4-6-0 tender locomotive from Brighton railway works in November 1913. However, soon after the delivery of the first tank engine in April 1914 the order for the second was changed to another tank engine. The four trailing bogie wheels were added to enable more fuel to be carried and to give additional stability when running bunker-first.〔Bradley, (1974) p.143-4〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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