British Rail Class 81
|British Railways AL1
British Rail Class 81
81017 at Manchester Piccadilly
|Builder||Associated Electrical Industries at Birmingham Railway Carriage and Wagon Company|
|AAR wheel arr.||B-B|
|Gauge||4 ft 8 1⁄2 in (1,435 mm) standard gauge|
|Wheel diameter||4 ft 0 in (1.219 m)|
|Length||56 ft 6 in (17.22 m)|
|Width||8 ft 8 1⁄2 in (2.65 m)|
|Height||12 ft 4 1⁄4 in (3.77 m)|
|Locomotive weight||79.60 long tons (80.9 t; 89.2 short tons)|
|Electric system(s)||25 kV AC Catenary|
|Stone-Faiveley ‘V’-type pantograph, 2 off (later 1 off)|
|Traction motors||847 hp (632 kW) AEI 189 quill drive, 4 off|
|Top speed||100 mph (161 km/h)|
|Power output||3,200 hp (2,390 kW)|
|Tractive effort||50,000 lbf (222 kN)|
|Train heating||Electric Train Heating|
|Locomotive brake||Air, Rheostatic|
|Train brakes||Vacuum; Dual from 1972–1973|
|Number||E3001–E3023, E3096, E3097; later 81001–81022|
|Axle load class||Route availability 6|
|Retired||1968 (2), 1971 (1), 1983–1991|
The British Rail Class 81 is an AC electric locomotive that formerly operated on the West Coast Main Line of the London Midland Region of British Rail. Originally designated AL1, it was the first type of AC electric locomotive to be delivered to British Railways.
As part of the modernization of the West Coast Main Line which included electrification, 100 locomotives of five types were acquired, each type from a different manufacturer.
The first locomotives to be delivered were of type AL1 designed by British Thomson-Houston (BTH), an order being placed for 25 examples. Of these, 23 were for use on passenger trains with a top speed on 100 mph and were designated Type A. The two remaining locomotives were to be for use on freight trains with a top speed of 80 mph, and were designated Type B.
Before the work was completed, BTH amalgamated with Metropolitan Vickers to form AEI (Associated Electrical Industries) traction division, and it was under this name that the locomotives were built in 1959 under subcontract by Birmingham Railway Carriage & Wagon in Smethwick. The first engine, number E3001, was handed over to British Railways on 27 November 1959. The type was initially used for crew training on the Styal Line between Manchester and Crewe.
The AL1 were numbered E3001 - E3023 and E3096 / E3097; The first twenty-three were Type A, while the last two were to have been the Type Bs and numbered E3301 and E3302. However the last two were instead geared for passenger service, being delivered in February 1964 as E3096 and E3097.
The locomotives always worked on power provided by overhead catenary energized at 25,000 V AC. However, the main transformer, normally operated with the four windings in series, could be operated at 6250V AC with the transformer windings in parallel. This voltage was initially to be used where limited clearances gave concern over use of the higher voltage. However, this approach was never used on the West Coast main line, although it was employed elsewhere such as Glasgow Central in the initial 'Blue Train' electrification there. By the time the WCML wiring was extended to Glasgow, it had been revised there to the mainstream 25Kv voltage.
Because they were restricted to those lines electrified at 25 kV AC they only operated on the West Coast Main Line. Cities where these engines could be seen included London, Birmingham, Manchester, Liverpool, and Glasgow. They operated passenger trains, freight trains, and parcel trains. There is no record of operation on the Ex-Great Eastern line, which was being electrified at the time of their introduction, nor subsequently on the East Coast Main Line (ECML) when that was electrified in the 1980s.
Three locomotives, E3002, E3009, and E3019, were withdrawn before they could be renumbered under the TOPS system. E3002 and E3019 were damaged by fire and both were scrapped at British Rail Crewe Works. E3009 was destroyed in an accident at Hixon in 1968 when the train that it was pulling collided with a transporter lorry carrying a 120-ton transformer on a level crossing. The remains of this locomotive were also cut up at Crewe Works.
Under the TOPS system, twenty-two examples were reclassified as class 81 and numbered 81001 - 81022.
In addition to the three examples withdrawn before renumbering under TOPS others were withdrawn as a result of damage after being renumbered.
81016 was involved in an accident on 9 December 1982 near Linslade, being officially withdrawn in 1983.
Over the years examples of this class were withdrawn from service. The final examples were used for the transfer of empty coaches between London Euston Station and Willesden sidings between 1989 and 1991. The last two examples withdrawn from service were 81012 and 81017.
|This section needs additional citations for verification. (October 2011)|
|Numbers||Works Number||Date Introduced||Withdrawn||Final Depot||Disposal|
|Type B||Type A||TOPS|
|-||E3001||81001||1083||Nov-59||Jul 1984||GW||Fire damaged
Scrapped at Crewe Works September 1986
|-||E3002||-||1084||Jan-60||Nov 1968||ACL||Fire damaged
Scrapped at Crewe Works January 1969
|-||E3003||81002||1085||Feb-60||Oct 1990||WN||Preserved at Barrow Hill Engine Shed|
|-||E3004||81003||1086||Apr-60||Mar 1988||GW||Scrapped at Coopers Metals, Sheffield November 1991|
|-||E3005||81004||1087||May-60||Apr 1990||WN||Scrapped at MC Metals, Glasgow May 1992|
|-||E3006||81005||1088||Jul-60||Feb 1989||GW||Scrapped at Coppers Metals, Sheffield November 1991|
|-||E3007||81006||1089||Aug-60||Oct 1988||GW||Scrapped at Coopers Metals, Sheffield November 1991|
|-||E3008||81007||1090||Sep-60||Feb 1990||GW||Scrapped at Coopers Metals, Sheffield November 1991|
|-||E3009||-||1091||Oct-60||Aug 1968||ACL||Accident damaged
Scrapped at Crewe Works August 1968
|-||E3010||81008||1092||Oct-60||Mar 1988||GW||Scrapped at Coopers Metals, Sheffield November 1991|
|-||E3011||81009||1093||Nov-60||Feb 1990||WN||Scrapped at Coopers Metals, Sheffield December 1991|
|-||E3012||81010||1094||Nov-60||May 1990||WN||Scrapped at Coopers Metals, Sheffield November 1991|
|-||E3013||81011||1095||Dec-60||Apr 1989||GW||Scrapped at Coopers Metals, Sheffield November 1991|
|-||E3014||81012||1096||Dec-60||Jul 1991||WN||Scrapped at Coopers Metals, Sheffield December 1991|
|-||E3015||81013||1097||Dec-60||Oct 1989||GW||Scrapped at Coopers Metals, Sheffield November 1991|
|-||E3016||81014||1098||Mar-61||Mar 1988||GW||Scrapped at Coopers Metals, Sheffield November 1991|
|-||E3017||81015||1099||May-61||Dec 1984||GW||Scrapped at MC Metals, Glasgow May 1992|
|-||E3018||81016||1100||Mar-61||Jul 1983||GW||Accident damaged
Scrapped at Crewe Works January 1985
|-||E3019||-||1101||Apr-61||Jul 1971||ACL||Fire damaged
Scrapped at Crewe Works October 1971
|-||E3020||81017||1102||Apr-61||Jul 1991||WN||Scrapped at Coopers Metals, Sheffield November 1991|
|-||E3021||81018||1103||Jun-61||Jan 1986||GW||Scrapped at MC Metals, Glasgow June 1992|
|-||E3022||81019||1104||Sep-61||Jan 1989||GW||Scrapped at Coopers Metals, Sheffield November 1991|
|-||E3023||81020||1105||Sep-61||Jul 1987||GW||Scrapped at Coopers Metals, Sheffield November 1991|
|(E3301)||E3096||81021||1106||Apr-62||Apr 1987||GW||Scrapped at MC Metals, Glasgow July 1992|
|(E3302)||E3097||81022||1107||Feb-64||Jul 1987||GW||Scrapped at Crewe Works by A Hampton November 1988|
- Bradley, Roger P (Nov 1980). "Pioneer AC electrics". Railway Modeller (Beer: Peco Publications & Publicity Ltd) 31 (360): pp385–387.
- Furness, Ian. "Disposals: Class 81". wnxx. End of the Line: Withdrawn & Stored Locomotives UK. Retrieved 2009-01-08.
- McManus, Michael. Ultimate Allocations, British Railways Locomotives 1948 - 1968. Wirral. Michael McManus.
- AC Type A Electric Locomotives for British Railways, No E3001-E3023 at The Railways Archive.
Publisher: Associated Electrical Industries Ltd.
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