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GWR Queen Class
The Queen Class was Joseph Armstrong's last class of 2-2-2 express engine for the Great Western Railway, larger than the Sir Daniel Class of about a decade earlier. They worked express trains for almost 30 years, and were in effect the predecessors of the larger Singles of William Dean.
==The locomotives==
The "Queens" started life as a single prototype, No.55 ''Queen'' herself, built at Swindon in 1873. A further 20 locomotives were constructed in 1875, numbered 999, 1000 and 1116-1133. No.999 was named ''Sir Alexander'' and sometimes the later series is referred to as the Sir Alexander Class, though in fact the locomotives were essentially the same as No.55. They all had 7'0" diameter driving wheels and 18 x 24 inch cylinders. The class's duties were the expresses on the London-Swindon-Gloucester and London-Wolverhampton routes. Naturally enough, No.55 became the principal GWR royal locomotive, carrying the royal coat of arms for royal journeys; though sometimes this decoration was applied to other, substitute engines.
As with many GWR lcomotives of the time, the individual members of the class were much modified in detail, at Wolverhampton as well as Swindon, with the addition of cabs, different chimneys and various types of boiler; some in their later years had Belpaire fireboxes, which gave a much more modern appearance. After 1900 the class was demoted to secondary duties in various parts of the system, and all were withdrawn between 1903 and 1914. All but a handful had a million miles to their credit at the time of withdrawal.
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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