LNWR G Class

LNWR G Class

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LNWR G Class

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<!--nulledit-->The London and North Western Railway (LNWR) G Class along with modifications that made them into G1, G2 and G2a classes, is a class of 0-8-0 steam locomotives designed for heavy freight work. They are known to railway enthusiasts as "Super Ds". This is because a large number of G1 class engines were rebuilt from George Whale class D 0-8-0s. They were Super Ds - super for superheated. The D class existed as such between 1906 and 1937. All this is explained by Willie Yeadon's book.Willie Yeadon A Compendium of LNWR Locomotives 1912-1964 Part Two Goods Tender Engines, Challenger Publications, April 1996, p69.


The LNWR built eight-coupled locomotives under Webb, Whale, Bowen-Cooke and Beames between 1892 and 1922. The G class were originally introduced in 1906 as modifications of the 4-cylinder compound B Class 0-8-0s by removing their outside cylinders to give a simpler two cylinder layout. From 1912 superheating was introduced and most of the B class were converted into G1 Class, not G Class. The G2 class were new builds with increased boiler pressure from 160lbf/inĀ² to 175psi. Some G1s were converted to G2a classes after their boiler pressure was increased.

After grouping in 1923, they were acquired by the LMS who gave them the power classifications 6F for G1 and 7F for G2 and G2a locomotives. The design of the LMS 7F 0-8-0 (known as the "Austin 7") was derived from the G2 but the former was a...
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