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Charles Collett
Charles Benjamin Collett (10 September 1871 - 5 April 1952) was Chief Mechanical Engineer of the Great Western Railway from 1922 to 1941. He designed (amongst others) the GWR's 4-6-0 Castle and King Class express passenger locomotives.
==Career==
Collett's predecessor, George Jackson Churchward had delivered to the GWR from Swindon a series of class leading and innovative locomotives, and arguably by the early 1920s the Great Western‘s 2-cylinder and 4-cylinder 4-6-0 designs were substantially superior to the locomotives of the other railway groupings.
In 1922 Churchward retired, and Collett inherited a legacy of excellent standardised designs. But, with costs rising and revenues falling, there was a need to rationalise the number of pre-grouping designs and to develop more powerful locomotives. Collett was a practical development engineer and he took Churchward's designs and developed them - the Hall from the Saint class, and the Castle from the Star. He was also responsible for more humble locomotives, such as many of the pannier tank classes.
In 1926, something bigger than the Castle class was required to haul heavy expresses at an average speed of . General Manager Sir Felix Pole told Collett to proceed with the design and construction of a "Super-Castle". The result was the King class 4-6-0 design which emerged from Swindon works in June 1927, designed to the maximum loading gauge allowed by the GWR's broad gauge legacy. The locomotive had dimensions never previously seen, and represented the ultimate development of Churchward's four cylinder concept. It was the heaviest (), and had the highest tractive effort (40,300 lbs.) of any 4-6-0 locomotive ever to run in the United Kingdom. Because of its scale, though, the King class was restricted to a limited number of the major GWR routes. In 1931, using the same maximum loading-gauge theory, Collett designed the GWR Super Saloons for use of the boat train services from London to Plymouth.
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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