British Rail Class 08

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British Rail Class 08
08168 at Shackerstone Station.jpg
08168 at Shackerstone Station on the Battlefield Line Railway
Type and origin
Power typeDiesel-electric
BuilderBritish Railways: Derby Works, Crewe Works, Darlington Works, Doncaster Works and Horwich Works.
Build date1953–1962
Specifications
Configuration:
 • Whyte0-6-0
 • UICC
Wheel diameter3 ft 6 in (1.067 m)
Wheelbase11 ft 6 in (3.51 m)
Length29 ft 3 in (8.92 m)
Width8 ft 6 in (2.59 m)
Height12 ft 8 12 in (3.87 m)
Loco weight49.6 long tons (50.4 t) to
51 long tons (51.8 t)
Fuel capacity668 imp gal (3,040 l; 802 US gal)
Prime moverEnglish Electric 6KT
Traction motorsEnglish Electric 506, 2 off
TransmissionDC generator, DC traction motors, double reduction drive
MU workingNot originally fitted, some retrofitted with type Blue Star
Train heatingNone
Train brakesVacuum, later Air & Vacuum or Air only
Performance figures
Top speed15 mph (24 km/h) or 20 mph (32 km/h)
Power outputEngine: 350 hp (261 kW)
Tractive effortMaximum: 35,000 lbf (160 kN)
Brakeforce19 long tons-force (190 kN)
Career
Railroad(s)British Railways
Number13000–13116, 13127–13136, 13167–13365; later: D3000–D3116, D3127–D3136, D3167–D3438, D3454–D3472, D3503–D3611, D3652–D3664, D3672–D3718, D3722–D4048, D4095–D4098, D4115–D4192; later 08001–08958
NicknamesGronk
Axle load classRoute availability 5 or 6 (see text)

The British Rail Class 08 is a class of diesel locomotive designed for shunting. It was the standard BR diesel-electric shunter. It was based on the LMS 12033 series (later TOPS Class 11). Production started in 1953 and when it finished in 1962, the class had become the most numerous of all British classes, numbering 996 in total. There were also 26 of the near-identical but higher geared Class 09, and 171 similar locomotives fitted with different engines and transmissions (some of which became Class 10), which together brought the total number of outwardly-similar machines to 1193.

Since their introduction, rail freight has primarily moved to fixed-rate bulk freight traffic and intermodal freight operations which reduce or remove the need for shunting, therefore only a few class 08 locomotives remain in service today.