British Rail Class D2/12

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British Railways class D2/12
Hudswell-Clarke 0-6-0 D2511, K&WVR, November 2012 Photo04 2 (9859813135).jpg
D2511, preserved at the Keighley and Worth Valley Railway
Type and origin
Power type Diesel-mechanical
Builder Hudswell Clarke
Serial number D1201–D1210
Build date 1961
Total produced 10
 • Whyte 0-6-0 DM
Gauge 4 ft 8 12 in (1,435 mm) standard gauge
Wheel diameter 3 ft 6 in (1.067 m)
Loco weight 34.20 long tons (34.75 t; 38.30 short tons)
Prime mover Gardner 8L3
Transmission fluid coupling and Bostock & Bramley four-speed Power-flow SSS synchro-self-shifting gearbox[1]
MU working Not fitted
Train heating None
Performance figures
Maximum speed 24 mph (39 km/h)
Power output Engine: 204 bhp (152 kW)
Tractive effort 16,100 lbf (71.6 kN)
Operators British Railways
Class D2/12; later 2/14A; no TOPS class
Numbers D2510–D2519
Axle load class Route availability 4
Retired 1967
Disposition 6 scrapped, 4 sold NCB (3 scrap[[]]ped, 1 preserved)

British Rail Class D2/12 was a locomotive commissioned by British Rail in England. It was a diesel powered locomotive in the pre-TOPS period built by Hudswell Clarke with a Gardner engine. The mechanical transmission, using a scoop control fluid coupling and four-speed Power-flow SSS (synchro-self-shifting) gearbox,[1] was a Hudswell Clarke speciality.

The D2/12 was mechanically similar to the earlier British Rail Class D2/7 but was of more modern appearance. The engine casing was lower, giving much better all-round visibility.

After British Rail[edit]

D2519 was employed at NCB Hatfield Main, Doncaster, South Yorkshire as a shunter. It was located there until at least 1984.

D2511 is preserved at the Keighley and Worth Valley Railway.[2]

See also[edit]

List of British Rail classes


  1. ^ a b Durham Mining Museum - Colliery Engineering
  2. ^ Marshall, A. (2007) Preserved Heritage Traction, GM Publications, Leeds, UK, ISBN 978-0-9555581-0-8


  • Ian Allan ABC of British Railways Locomotives, 1966 edition, page 81
  • Strickland, David C. (1982). Locomotive Directory, every single one there has ever been. Camberley, Surrey: Diesel & Electric Group. p. 41. ISBN 0-906375-10-X.