GWR 3100 Class
Class of British steam locomotives
The Great Western Railway (GWR) 3100 Class was a class of 2-6-2T side tank steam locomotive.
01History
This class of large prairie was created in 1938 when Collett rebuilt some of Churchward's 3150 Class engines for use as bankers, particularly from Severn Tunnel Junction shed. These engines used the same standard class 4 boiler, but with pressure increased to 225 psi (1,550 kPa) and smaller 5 feet 3 inches (1.600 m) driving wheels and a one-half inch (13 mm) increase in cylinder diameter. This raised their tractive effort to 31,170 pounds-force (138,700 N). Less noticeable was a 2 in (50.8 mm) reduction in pony truck wheel diameter to 3 ft 0 in (914 mm). Only five engines were ever modified, Nos. 3173, 3156, 3181, 3155 and 3179 which were rebuilt as 3100 to 3104 respectively. All members of the class were scrapped.
Sources and credits
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