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LMS Coronation Class
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=== British speed record === Between 1937 and 1939, two significant records were set by locomotives of the Coronation class. Before the introduction of the ''Coronation Scot'' service, No. 6220 ''Coronation'' headed a special train of invited guests from [[Euston railway station|London Euston]] to [[Crewe railway station|Crewe]] on 29 June 1937. After a fast but uneventful run the engine was accelerated up to high speed. Just south of Crewe, the train (disputably)<ref>{{cite book |last=Nock |first=O.S. |author-link=O. S. Nock |year=1971 |title=Speed Records on British Railways |publisher=[[David & Charles]] |location=Newton Abbot |isbn=0-7153-5342-X |pages=163β164}}</ref> achieved a speed of {{convert|114|mph|km/h}}, narrowly beating the previous British record for a steam locomotive (held by the [[London and North Eastern Railway]] (LNER)). The brakes were applied far too late at such a speed and the result was that the train entered a series of crossover points at Crewe much too fast. Fortunately, Stanier had designed an inherently stable locomotive and both ''Coronation'' and its following train held the rails, although most of the crockery in the dining car was smashed, much to the consternation of the assembled guests{{r|Nock84|pp=82β83}}{{r|Roden|pp=26β31}} In contrast to the LNER's record-breaking effort the previous year, when [[LNER Class A4|A4 Class]] No. 2512 had suffered severe damage when the centre cylinder's big end bearing failed,<ref>{{cite book |last=Tuplin |first=W.A. |title=British Steam since 1900 |publisher=Pan Books |location=London |year=1969 |isbn=0-330-02721-2 |url-access=registration |url=https://archive.org/details/britishsteamsinc00pan |page=130-131}}</ref> No.6220 was undamaged and was driven back to London the same day at an average speed of {{convert|79.9|mph|km/h}}, maintaining over 100 mph for several miles.<ref name="Hollingsworth">{{cite book| last=Hollingsworth| first=Brian| title=The illustrated Encyclopaedia of the World's Steam Passenger Locomotives| publisher=Salamander Books| location=London| year=1982| isbn=0-86101-106-6 |page=152}}</ref> The LNER was to regain its ascendancy on 3 July 1938 when A4 Class No. 4468, ''Mallard'' regained the British and world records with a recorded maximum speed of {{convert|126|mph|km/h}}.{{r|Nock84|p=86}}
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