Production
The most visible difference between No.97 and the first of the 1905 production batch was the higher pitch of the boiler (8 ft 2 in/2.49 m opposed to 7 ft 8 1⁄2 in/2.35 m). At first the prototype was given a 4,000-imperial-gallon (18,000 l; 4,800 US gal) tender but almost without exception the 2800s were harnessed to the 3,500-imperial-gallon (16,000 l; 4,200 US gal) variety throughout their working lives. Superheating was incorporated into the class from 1909 with No.2808 the first to be retro-fitted. Other modifications centred on improving the weight distribution, altering smokebox lengths and fitting larger diameter chimneys. The 84 2800s built by Churchward remained the GWR's principal long haul freight engines throughout the 1920s and 1930s. The only serious problem met with in traffic was with the sealing of the internal steam pipes. Beginning in 1934 most of the class had them replaced with the outside kind.
Read more about this topic: GWR 2800 Class
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—Karl Marx (1818–1883)