Taff Vale Railway A class

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Template:Short description Template:Use dmy dates Template:Use British English Template:Infobox Locomotive

The Taff Vale Railway A class was a class of 0-6-2T steam tank locomotives designed by J. Cameron for mixed traffic work and introduced to the Taff Vale Railway (TVR) in 1914. The A class was an enlarged version of the TVR O4 class designed by Tom Hurry Riches in 1907. The A class was the last new class of locomotive to be introduced on the TVR, which had introduced its first 0-6-2Ts in 1885 (the M class); and, with a total of 58 built, was numerically the largest class of tank locomotive on the TVR.[1]

Previous classes of mixed-traffic 0-6-2T on the TVR (the M, M1, N, O, O1, O2, O3 and O4 classes) had used driving wheels of Script error: No such module "convert". or Script error: No such module "convert". diameter; but the A class used the same diameter as the TVR's passenger 0-6-2T (U and U1 classes), i.e. Script error: No such module "convert"., and they were used mainly on passenger trains.Template:Sfn

The first 51 locomotives initially had boilers working at a pressure of Script error: No such module "convert"., which (except for no. 120) was later altered to Script error: No such module "convert".; the last seven worked at the higher pressure from new. By the time that the TVR amalgamated with the Great Western Railway (GWR) at the start of 1922, only four (TVR nos. 3, 42, 52 and 120) still worked at the original pressure. All of the A class locomotives were rebuilt with taper boilers and superheaters by the GWR between 1924 and 1932; these also worked at Script error: No such module "convert". at first. The pressure was raised to Script error: No such module "convert". between 1930 and 1939; at the same time, the cylinder bore was reduced from Script error: No such module "convert". to Script error: No such module "convert"..Template:Sfn All 58 passed to British Railways (BR) in 1948, until the introduction of the BR 82xxx 2-6-2Ts in the mid-1950s, these engines were widely used on passenger workings in the South Wales Valleys.

After withdrawal, several were employed as Works Pilots in Swindon before being broken up.[2]Template:Sfn The first loco withdrawn was 344 in November 1952 from Cardiff Cathays shed. The last seven locos 370, 373, 381, 383, 390, 398 and 402 were withdrawn together in August 1957 from Abercynon shed. None are preserved.

Builders and numbering

The locomotives were built in several batches by Hawthorn Leslie, Nasmyth, Wilson and Company, Vulcan Foundry and North British Locomotive Company. Their initial GWR numbers were in the ranges 335–408 (for locos working at a boiler pressure of Script error: No such module "convert".) and 438–441 (pressure Script error: No such module "convert".), but they were not consecutive and were intermingled with other classes. Those with numbers above 399 were renumbered between 303 and 322 during 1947–50.Template:Sfn

List of TVR A class locomotive orders
Year Quantity Manufacturer Serial Numbers TVR Numbers GWR Numbers Notes
1914 6 Hawthorn Leslie 3057–3062 3, 7, 10, 11, 12, 120 438, 335, 337, 343, 344, 441 441 renumbered 322 in 1947, 438 renumbered 309 in 1949Template:Sfn
1915 6 North British Locomotive Co. 21156–21161 42, 45, 52, 122, 123, 124 439, 346, 440, 352, 356, 357 439 and 440 renumbered 312 and 316 in 1949 and 1950 respectivelyTemplate:Sfn
1916 6 Vulcan Foundry 3178–3183 125, 127, 128, 129, 130, 132 360, 361, 362, 364, 365, 366
1919 12 Nasmyth, Wilson & Co. 1269–1280 133, 135, 136, 138, 139, 140, 154, 156, 157, 158, 159, 160 367, 370, 371, 372, 373, 374, 377, 378, 379, 380, 381, 382
1920 16 Hawthorn Leslie 3394–3409 20, 134, 144, 149, 162, 164, 165, 400 to 408 345, 368, 375, 376, 383 to 391, 393, 394, 397
1921 5 Hawthorn Leslie 3410–3414 409 to 413 398, 399, 401 to 403 401 and 403 renumbered 303 and 305 in 1947, 402 renumbered 304 in 1948Template:Sfn
1914 7 Vulcan Foundry 3492–3498 75, 80, 90, 91, 414 to 416 347 to 349, 351, 404, 406, 408 404, 406, and 408 renumbered 306 to 308 in 1949, 1949 and 1948 respectivelyTemplate:Sfn

Originally, the Taff Vale Railway commissioned the German locomotive factory Hannoversche Maschinenbau AG to build six locomotives in 1914.[3] However, due to the outbreak of the First World War, the deal did not come into being.[4] The order for these six locomotives was transferred to North British and they were delivered as nos. 42 etc. during 1915.Template:Sfn

See also

References

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  1. ↑ Script error: No such module "citation/CS1".
  2. ↑ Script error: No such module "citation/CS1".
  3. ↑ Script error: No such module "citation/CS1".
  4. ↑ Tradition, Zeitschrift für Firmengeschichte und Unternehmerbiographie, 2. Jahrg., Erinnerungen aus der Geschichte der Hanomag von Erich Metzeltin, Verlag C.H.Beck, August 1957, p. 280.

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Sources

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External links

Script error: No such module "Navbox". Template:GWR absorbed locos 1922 on

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