British Rail Class D2/7

British Rail Class D2/7

A Hudswell Clarke industrial diesel locomotive similar to the British Rail Class D2/7

Type and origin Power type Diesel-mechanical Builder Hudswell Clarke Serial number D898–D902, D938–D942 Build date 1955–1956

Specifications Configuration 0-6-0 DM UIC class C Gauge 4 ft 8 ^1⁄2 in (1,435 mm) standard gauge Wheel diameter 3 ft 6 in (1.067 m) Loco weight 36.35 long tons (36.93 t; 40.71 short tons) Prime mover Gardner 8L3 Transmission Mechanical, SSS Powerflow three-speed gearbox MU working Not fitted Train heating None Train brakes None

Performance figures Maximum speed 14 mph (23 km/h) Power output Engine: 204 bhp (152 kW) Tractive effort 16,100 lbf (71.6 kN)

Career Operators British Railways Class D2/7; later 2/14; no TOPS class Numbers 11116–11120, 11144–11148; D2500–D2509 from 1958 to 1962 Axle load class Route availability 4 Retired 1967 Disposition All scrapped

British Rail Class D2/7 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 three-speed Power-flow SSS (synchro-self-shifting) gearbox,^[1] was a Hudswell Clarke speciality.

Appearance

The D2/7 was of old-fashioned appearance with a full-height engine casing and a small, steam locomotive-type chimney. The later British Rail Class D2/12, although mechanically similar, was of more modern appearance.

Modelling

A kit is available from Invertrain ^[2] in 7 mm Scale ( O Gauge)

Mercian Models ^[3] make kits for this locomotive and the very similar industrial version, in both 4 mm and 7 mm scale.

See also

List of British Rail classes

References

1. Durham Mining Museum - Colliery Engineering
2. http://www.invertrain.co.uk/detail.php?item=2817
3. http://www.modelrailways.tv/

Sources

• Ian Allan ABC of British Railways Locomotives, winter 1962/3 edition, page 199