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・ LSWR E14 class
・ LSWR F13 class
・ LSWR G14 class
・ LSWR G16 class
・ LSWR G6 class
・ LSWR H15 class
・ LSWR H16 class
・ LSWR K10 class
・ LSWR L11 class
・ LSWR L12 class
・ LSWR M7 class
・ LSWR N15 class
・ LSWR O2 class
・ LSWR O2 Class W24 Calbourne
・ LSWR P14 class
LSWR S11 class
・ LSWR S15 class
・ LSWR suburban lines
・ LSWR T1 class
・ LSWR T14 class
・ LSWR T3 class
・ LSWR T6 class
・ LSWR T7 class
・ LSWR T9 class
・ LSWR X2 class
・ LSWR X6 class
・ Lsy-6 microRNA
・ LSZ (disambiguation)
・ LSZ reduction formula
・ LSZH


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LSWR S11 class : ウィキペディア英語版
LSWR S11 class

The LSWR Class S11 was a class of 10 4-4-0 steam locomotives designed for express passenger work by Dugald Drummond. They were introduced to services on the London and South Western Railway in 1903. None of the class survived into preservation after their brief career in British Railways ownership.
== Background ==

The problem of uniting both power and traction in a compact express passenger locomotive design had taxed the Locomotive Superintendents of the LSWR for many years.〔Burtt (1949).〕 Joseph Beattie was the first to establish the LSWR's policy of using smaller wheeled locomotives to handle these steep gradients.〔
Dugald Drummond attempted to grasp the nettle by utilising his new T9 class over the arduous route. It soon became clear that despite the merits of the T9s for fast running on the various express passenger services to the west of England, the large wheels of the class were not suited for the task in hand. A new design of locomotive was needed that incorporated the desired improvements to enable fast running on gradients.〔

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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