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LNER Peppercorn Class A1
The London and North Eastern Railway (LNER) Peppercorn Class A1 is a type of express passenger steam locomotive. Forty-nine original Peppercorn Class A1s were built to the design of Arthur Peppercorn (who was the last Chief Mechanical Engineer (CME) of the London and North Eastern Railway) during the early British Railways era, but all were scrapped with the discontinuation of steam, with none of the original production run surviving into preservation. In 2008 a brand new 50th Peppercorn A1 locomotive, 60163 ''Tornado'', was completed.
== Background ==
Most of the former LNER Class A1 locomotives designed by Sir Nigel Gresley had been rebuilt as LNER Class A3 locomotives prior to this class being conceived. The few straggling LNER Class A1 locomotives that remained unrebuilt during the tenure of Peppercorn's predecessor, Edward Thompson, were redesignated by him as Class A10s in preparation for the construction of his new Class A1 locomotives. Thompson rebuilt the pioneer LNER pacific ''Great Northern'' in 1945; originally this was the new Class A1, but the rebuild was not repeated. Instead, initiated by Thompson but largely taken forward by his successor Arthur Peppercorn, ''Great Northern'' was designated Class A1/1, and a new class of Peppercorn A1s ordered.
The locomotives were designed to cope with the heaviest passenger trains in the after-war period on the East Coast Main Line (London – York – Newcastle – Edinburgh – Aberdeen) which consisted normally of trains with up to 15 coaches and up to 550 tons. The Peppercorn A1s were able to pull such a train on the flat at a speed of 60–70 mph (95-110 km/h). Like previous LNER pacifics, the class had a 3-cylinder arrangement. The chimney system was of the type Double-Kylchap.
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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