Taff Vale Railway A class

The Taff Vale Railway A class was a class of 0-6-2T steam tank locomotives designed by J. Cameron and introduced to the Taff Vale Railway in 1914. The A class was an enlarged version of the Taff Vale Railway O4 class designed by Tom Hurry Riches in 1907.

Taff Vale Railway A class
Class 'A' No. 397 at Abercynon 1946 (rebuilt with GWR boiler)
Type and origin
Power typeSteam
DesignerJohn Cameron
BuilderHawthorn Leslie & Co. (27);
Nasmyth, Wilson & Co. (12);
North British Locomotive Co. (6);
Vulcan Foundry (13)
Build date1914–1921, rebuilt 1924
Total produced58
Specifications
Configuration:
​
 • Whyte0-6-2T
Gauge4 ft 8 1⁄2 in (1,435 mm) standard gauge
Driver dia.5 ft 3 in (1.600 m)
Loco weight65.70 long tons (66.75 t; 73.58 short tons)
Fuel typeCoal
Boiler pressureAs built: 175 psi (1.21 MPa)
Rebuilt: 200 psi (1.38 MPa)
CylindersTwo, inside
Cylinder sizeAs built: 18 in × 26 in (457 mm × 660 mm)
Rebuilt: 17.5 in × 26 in (444 mm × 660 mm)
Performance figures
Tractive effortAs built: 21,000 lbf (93.4 kN)
Rebuilt: 21,480 lbf (95.5 kN)
Career
Power classBR: 4P
Retired1952–1957
DispositionAll scrapped

42 of the A class locomotives were rebuilt with taper boilers and superheaters by the Great Western Railway (GWR) and vacuum brakes for passenger working in 1924. 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.

Several were employed as Works Pilots in Swindon.[1] The first loco withdrawn was 344 in November 1952 from Cardiff Cathays shed. The last seven locos 370, 373, 381, 383, 390, 398 and 402 were withdrawn together in August 1957 from Abercynon shed.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 GWR/BR numbers were in the range 303-440 but they were not consecutive and were intermingled with other classes.

List of TVR A class locomotive orders
YearQuantityManufacturerSerial NumbersTVR NumbersGWR NumbersNotes
19146Hawthorn Leslie3057–30623, 7, 10, 11, 12, 120438, 335, 337, 343, 344, 441441 renumbered 322 in 1947, 438 renumbered 309 sometime between 1948 and 1950
19156North British Locomotive Co.21156–2116142, 45, 52, 122, 123, 124439, 346, 440, 352, 356, 357439 and 440 renumbered 312 and 316 sometime between 1948 and 1950
19166Vulcan Foundry3178–3183125, 127, 128, 129, 130, 132360, 361, 362, 364, 365, 366
191912Nasmyth, Wilson & Co.1269–1280133, 135, 136, 138, 139, 140, 154, 156, 157, 158, 159, 160367, 370, 371, 372, 373, 374, 377, 378, 379, 380, 381, 382
192016Hawthorn Leslie3394–340920, 134, 144, 149, 162, 164, 165, 400 to 408345, 368, 375, 376, 383 to 391, 393, 394, 397
19215Hawthorn Leslie3410–3414409 to 413398, 399, 401 to 403401 and 403 renumbered 303 and 305 in 1947, 402 renumbered 304 sometime between 1948 and 1950
19147Vulcan Foundry3492–349875, 80, 90, 91, 414 to 416347 to 349, 351, 404, 406, 408404, 406, and 408 renumbered 306 to 308 sometime between 1948 and 1950

See also

References
  1. https://www.rail-online.co.uk/p218810771/h9E6639FD#h3717cd0d

Sources
  • ABC of British Railways Locomotives; part 1. Ian Allan. Winter 1957–1958. p. 22.


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