British Rail Class 10

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British Rail Class 10
Class 10 D3634 (8312215384).jpg
.D3634 (never renumbered in "10" series) in BR green at Stratford MPD, July 1967.
Type and origin
Power typeDiesel-electric
BuilderBR Darlington Works (140) and Doncaster Works (6)
Build date1955–1962
Total produced146
 • Whyte0-6-0
Gauge4 ft 8 12 in (1,435 mm) standard gauge
Wheel diameter4 ft 6 in (1.372 m)
Wheelbase11 ft 6 in (3.505 m)
Length29 ft 3 in (8.92 m)
Width8 ft 6 in (2.591 m)
Height12 ft 8 12 in (3.874 m)
Loco weight48.6 long tons (49.4 t; 54.4 short tons)
Fuel capacity668 imp gal (3,040 l; 802 US gal)
Prime moverBlackstone ER6T
Traction motorsGEC nose suspended, 2 off
TransmissionDiesel-electric, double reduction gearing
MU workingNot fitted
Train heatingNone
Train brakesVacuum
Performance figures
Maximum speed27.5 mph (44 km/h)
Power outputEngine: 350 hp (261 kW)
Tractive effortMaximum: 35,000 lbf (155.7 kN)
Continuous: 11,100 lbf (49.4 kN)
OperatorsBritish Railways
Numbers13137–13151; later D3137–D3151, D3439–D3453, D3473–D3502, D3612–D3651, D4049–D4094
Axle load classRA 5
WithdrawnFebruary 1967- June 1972
DispositionFour preserved, remainder scrapped

The British Rail Class 10 diesel locomotive was a variation on the Class 08 diesel-electric shunter in which a Blackstone diesel engine was fitted instead of one made by the English Electric company. Traction motors were by the General Electric Company plc (GEC); the class D3/5 were similar, but had British Thomson-Houston (BTH) traction motors

The locomotives were built at the BR Works in Darlington and Doncaster over the period 1955–1962. At first they were classified D3/4, then 3/1C before becoming Class 10 under TOPS

Technical details[edit]

  • Engine: Blackstone 6-cylinder, 4-stroke, ER6T
  • Traction motors: 2 x GEC nose suspended motors


The class were withdrawn between February 1967 and June 1972.

Table of withdrawals[1]
Year Quantity in
service at
start of year
Locomotive numbers
1967 146 6 D3151, D3449/96, D3620/28/31.
1968 140 77 D3139–40/42/46–48/51,
D3500–02, D3624–27/30/32–33/35–37/40/43,
1969 63 21 D3143–44, D3479/83/92,
1970 41 9 D3137/49, D3486, D3638[c]/44/47, D4052/67/77.
1971 34 14 D3141, D3634/41/46/48/50–51, D4050–51/53/55/59–60/65.
1972 20 20 D3138/45, D4049/54/56–58/61–63/66/68–70/72–75/78–79.
  1. ^ D3494 withdrawn due to accident damage
  2. ^ Withdrawn July, reinstated August
  3. ^ Reinstated March, withdrawn November


D3452, at Bodmin on 28 August 2003. This locomotive is preserved on the Bodmin & Wenford Railway

Twenty locomotives were sold to industrial customers; of which, four have been preserved:


  • Strickland, David C. (September 1983). Locomotive Directory: Every Single One There Has Ever Been. Camberley, Surrey: Diesel and Electric Group. pp. 53–61. ISBN 978-0-9063-7510-5. OCLC 16601890.

  1. ^ Strickland 1983, pp. 56–57.