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・ GWR 3300 Class
・ GWR 34 Class
・ GWR 3501 class
・ GWR 3511 class
・ GWR 3521 Class
・ GWR 3571 class
・ GWR 360 Class
・ GWR 3600 Class
・ GWR 3700 Class
・ GWR 3700 Class 3440 City of Truro
・ GWR 378 Class
・ GWR 3800 Class
・ GWR 388 class
・ GWR 4000 Class
・ GWR 4000 Class 4003 Lode Star
GWR 4073 Class
・ GWR 4073 Class 4073 Caerphilly Castle
・ GWR 4073 Class 4079 Pendennis Castle
・ GWR 4073 Class 5029 Nunney Castle
・ GWR 4073 Class 5043 Earl of Mount Edgcumbe
・ GWR 4073 Class 5051 Earl Bathurst
・ GWR 4073 Class 5080 Defiant
・ GWR 4073 Class 7027 Thornbury Castle
・ GWR 4073 Class 7028 Cadbury Castle
・ GWR 4073 Class 7029 Clun Castle
・ GWR 4100 Class
・ GWR 4200 Class
・ GWR 4200 Class 4277
・ GWR 4300 Class
・ GWR 439 Class


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GWR 4073 Class : ウィキペディア英語版
GWR 4073 Class

The 4073 Class or Castle class were 4-6-0 steam locomotives of the Great Western Railway design built between 1923 and 1950. They were designed by the railway's Chief Mechanical Engineer, Charles Collett, for working the company's express passenger trains.
==Background==
The origins of this highly successful design date back to the Star Class of 1907 which introduced the basic 4-cylinder 4-6-0 layout with long-travel valves and Belpaire firebox that was to become synonymous with GWR express passenger locomotives. The Star class were designed to take the top express trains on the GWR with 61 in service by 1914, but after World War 1 there was a need for an improved design. To meet this need Chief Mechanical Engineer GJ Churchward had in mind an enlarged Star class design with a standard No.7 boiler, as fitted to his GWR 4700 Class express freight 2-8-0 design. However, this combination would have taken the axle load of such a design over the 20 ton limit then set by the civil engineers, and in the end nothing came of the idea.

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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