TheGreat Western Railway (GWR)2221 Class orCounty Tank was a class of4-4-2Tsteam locomotive, effectively a tank engine version of the3800 "County" Class4-4-0 tender locomotives. The two classes had different boilers, standard no 4 for the tender locomotive, and the smaller (by about 350 sq ft or 33 m2) standard no 2 for the tank. 2230 was fitted with the larger boiler when new, but this was unsuccessful and was quickly altered.[2]
Thirty were built between 1905 and 1912 to replace the3600 "Birdcage" Class. They were built in three batches of ten, the batches having minor differences. In the final batch the drop in the front framing above the cylinders was curved, the cylinders were also lower, superheaters and top feed were fitted from new. Later in life, the earlier members of the class were fitted with superheaters, and some were given larger bunkers in line with other standard tank classes.[3]
Their work was concentrated on London suburban services. They were replaced by the more versatileGWR 6100 Class from 1931 onwards, the last going in 1934.[5] Their large four coupled driving wheels were suited to high speed running on outer suburban services but acceleration was slower than that of the six coupled, smaller wheeled locomotives.
Like the Counties, they had a reputation for rough riding, caused by their short coupled wheelbase and large outside cylinders. None survived into preservation.
Allcock, N. J.; Davies, F. K.; le Fleming, H. M.; Maskelyne, J. N.; Reed, P. J. T.; Tabor, F. J. (1968) [1951]. White, D. E. (ed.).The Locomotives of the Great Western Railway, part one: Preliminary Survey. Kenilworth:RCTS.
Haresnape, Brian; Swain, Alec (1976).Churchward locomotives : a pictorial history. London: I. Allan.ISBN0-7110-0697-0.
le Fleming, H. M. (February 1962). White, D. E. (ed.).The Locomotives of the Great Western Railway, part nine: Standard Two-Cylinder Classes.RCTS.ISBN0-901115-37-1.OCLC655827210.{{cite book}}: CS1 maint: ignored ISBN errors (link)
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