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LNER Peppercorn A1's

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LNER Peppercorn A1's Empty LNER Peppercorn A1's

Post  RJ Bandsma #68 Sat Nov 13, 2010 5:58 am

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 at the East Coast Mainline (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.
RJ Bandsma #68
RJ Bandsma #68
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