British Rail Class 11

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British Rail Class 11
Bridgnorth - 12099 in the yard.JPG
12099 preserved on the Severn Valley Railway
Type and origin
Power type Diesel-electric
Builder LMS/BR Derby & BR Darlington
Build date 1945–1952
Total produced 120
Specifications
Configuration 0-6-0
UIC class C
Gauge 4 ft 8 12 in (1,435 mm) standard gauge
Wheel diameter 4 ft 0 12 in (1.232 m)
Minimum curve 3.5 chains (70.41 m)
Wheelbase 11 ft 6 in (3.505 m)
Length 29 ft 1 12 in (8.88 m)
Width 8 ft 5 in (2.565 m)
Height 12 ft 5 12 in (3.797 m)
Loco weight 47.4 long tons (48.2 t; 53.1 short tons)
Fuel capacity 660 imp gal (3,000 l; 790 US gal)
Prime mover English Electric 6KT
Generator English Electric 801 — 441 A, 430 V DC
Traction motors English Electric 506, DC, 2 off
Cylinders Straight 6
Transmission Diesel-electric, double reduction gearing
MU working Not fitted
Train heating None
Loco brake Air
Performance figures
Maximum speed 20 mph (32 km/h)
Power output Engine: 350 hp (261 kW)
Tractive effort Maximum: 34,900 lbf (155.2 kN)
Loco brakeforce 32.2 long tons-force (321 kN)
Career
Operators War Department
Nederlandse Spoorwegen (NS)
London, Midland and Scottish Railway
British Railways
National Coal Board
HNRC
Imperial Chemical Industries (ICI)
heritage railways
Number in class
  • WD: 14 (10 to NS)
  • LMS/BR: 106
Numbers
  • WD: 70260–70273
  • LMS: 7120–7129
  • BR: 12033–12138
Axle load class RA 5
Withdrawn 1967–1971
Disposition 8 preserved, remainder scrapped

The British Rail Class 11 was applied to a batch of diesel shunting locomotives built from April 1945 to December 1952, based on a similar earlier batch built by the London, Midland and Scottish Railway (LMS) between 1934 and 1936.

Overview[edit]

Numbering[edit]

An initial batch of twenty locomotives was built during World War II, fourteen of which were built for the War Department, with the first ten of these (70260-70269) subsequently going to the Nederlandse Spoorwegen post-war as NS 501–510. LMS numbers 7120–7126 went straight into LMS stock, and a follow-up batch was built, 7129 being the last diesel shunter to be built for the LMS. British Railways continued to build the class from 1948 to 1952, using numbers M7130–M7131 and 12045–12138. 7120–7129 and M7130–M7131 became BR numbers 12033–12044. The whole class of 12033–12138 became Class 11. Locomotives up to 12102 were built at LMS/BR Derby and 12103–12138 at BR Darlington.

Export locomotives[edit]

Close to 100 almost identical machines were built by English Electric and supplied to Nederlandse Spoorwegen (NS) as their 500 Class & 600 Class diesel locomotives. In addition to the exported 501-510 mentioned above, 500 Class also included 511-545. Sixty-five of the 600 Class locomotives were built by English Electric between 1950 and 1957, numbered 601–665, at either Dick, Kerr & Co. Works (601–610) in Preston or Vulcan Foundry Works (remainder) in Newton-le-Willows. A further batch of 15 locomotives were exported without engines so that they could be fitted as such in the Netherlands. These were numbered 701-715.

Another export order was to Australia, with 16 locomotives built in 1951 but with the design modified for use on 5 ft 3 in gauge railways. The Victorian Railways bought ten, which were designated as F class, and six were bought by the State Electricity Commission of Victoria for shunting on sidings connected to Victorian Railways tracks.[1]

Technical details[edit]

The diesel engine is an English Electric 6-cylinder, 10-inch bore by 12-inch stroke (254 mm by 305 mm); 4-stroke, 6KT and the traction motors are two: EE506 axle-hung, nose-suspended, force-ventilated traction motors with 21.7:1 double reduction gear drive. The main generator is an English Electric EE801, 441 A at 430 V.

Withdrawal[edit]

The 106 locomotives of British Railways were withdrawn between May 1967 and November 1972

Table of withdrawals[2]
Year Quantity in
service at
start of year
Quantity
withdrawn
Locomotive numbers
1967 106 5 12068, 12104/07/23/29.
1968 101 17 12034–37/39–44/72, 12119/20/24/26/37/38.
1969 84 24 12033/38/45–48/57/59/64/66/67/70/86/92/95/95,
12100/12/16[a]/17/125/31/33/35.
1970 60 11 12050/54/62/81/89/91, 12101/06/14/15/28.
1971 49 40 12049/51–53/55/56/58/60/61/65/69/71/73
12075–78/80/82–85/87/88/90/93/94/97–99,
12102/03/05/08/11/18/21/22/36.
1972 9 10 12063/74/79, 12103[b]/09/10/27/30/32/34.
  1. ^ accident damage
  2. ^ reinstated January, withdrawn June

Post-BR use[edit]

Sixteen locomotives were sold to the National Coal Board, and were used in the North East, South Wales and the Kent Coalfield.[3]

The following locomotives were at Harry Needle Railroad Company (HNRC):[when?]

Preservation[edit]

The following Class 11 diesel shunters are preserved:

See also[edit]

References[edit]

  1. ^ "F class d/e locomotives". www.victorianrailways.net. Retrieved 2008-08-10. 
  2. ^ Strickland 1983, pp. 51–52.
  3. ^ Strickland 1983, pp. 52.
  4. ^ "End of the Line: Withdrawn & Stored Locomotives UK". www.wnxx.com. 1 November 2010. Retrieved 2010-11-01. 
  • Strickland, David C. (September 1983). Locomotive Directory. Camberley, Surrey: Diesel and Electric Group. pp. 51–52. ISBN 0-906375-10-X. 

Further reading[edit]

  • McManus, Michael. Ultimate Allocations, British Railways Locomotives 1948 - 1968. Wirral. Michael McManus.