Английская Википедия:British Rail Class 91

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Шаблон:Short description Шаблон:Use dmy dates Шаблон:Use British English Шаблон:Infobox locomotive

The British Rail Class 91 is a high-speed electric locomotive, which produces power of Шаблон:Convert; it was ordered as a component of the East Coast Main Line modernisation and electrification programme of the late 1980s. The Class 91s were given the auxiliary name of InterCity 225 to indicate their envisaged top speed of Шаблон:Convert; they were also referred to as Electras by British Rail during their development and throughout the electrification of the East Coast Main Line.

The locomotive body shells are of all-steel construction. Unusually, the motors are body mounted and drive bogie-mounted gearboxes via cardan shafts; this reduces the unsprung mass and hence track wear at high speeds. The locomotive also features an underslung transformer, therefore the body is relatively empty compared to contemporary electric locomotives. Much of the engineering specification for the locomotive was derived from the research and operational experience of the APT-P.[1][2]

The other end of the InterCity 225 train set is formed of a Mark 4 Driving Van Trailer, built with a similar body shell to the Class 91 locomotives but with only one driving cab.

History

Background

The origins of the Class 91 are closely associated with the East Coast Main Line (ECML) that it has been primarily operated upon. During the 1950s, British Rail had considered electrification of the ECML to be of equal importance to the West Coast Main Line (WCML), but various political factors led to the envisioned electrification programme being delayed for decades; as an alternative, high-speed diesel traction, the Deltic and then the InterCity 125, was introduced upon the route during the 1960s and 1970s.[3] During the 1970s, a working group of British Rail and Department of Transport officials determined that, out of all options for further electrification, the ECML represented the best value by far. Its in-house forecasts determined that increases in revenue and considerable reductions in energy and maintenance costs would occur by electrifying the line.[4]

Accordingly, between 1976 and 1991, the ECML was electrified with Шаблон:Nowrap overhead lines. The electrification was installed in two phases: The first phase between London (King's Cross) and Шаблон:Rws (including the Hertford Loop Line) was carried out between 1976 and 1978 as the Great Northern Suburban Electrification Project, using Mk. 3A equipment,[5] covering Шаблон:Convert in total.[4][3] In 1984, the second phase commenced to electrify the northern section to Edinburgh and Leeds. During the late 1980s, the programme was claimed to be the longest construction site in the world, spanning more than Шаблон:Convert.[4]

In 1989 the InterCity 225 was officially introduced to revenue service.[6][7] That same year, the ECML had been energised through to York;[4] two years later, electrification had reached Edinburgh, allowing electric services to begin on 8 July 1991, eight weeks later than scheduled. The ECML electrification programme was completed at a cost of £344.4Шаблон:Nbspmillion (at 1983 prices), a minor overrun against its authorised expenditure of £331.9Шаблон:Nbspmillion. 40 per cent of the total cost was on new traction and rolling stock and 60 per cent for the electrification of the line.[4]

Options and selection

The electrification of the ECML necessitated the procurement of new high speed electric traction. The options and requirements for this trainset were hotly deliberated for a number of years. On 7 June 1978, the electric-powered prototype Advanced Passenger Train (APT) was unveiled; it was at one point intended for the APT to be the next major intercity express train.[8] However, due to various factors including technical issues, the APT programme was curtailed during the summer of 1983. Shortly thereafter, two alternative options were explored, an electrified version of the InterCity 125 (known as the HST-E), and the Шаблон:Brc mixed-traffic locomotive; these were both intended to a peak service speed of 125Шаблон:Nbspmph.[9]

Some officials within British Rail pushed for more demanding requirements for the future Intercity trainset; reportedly, BR's Director of Mechanical and Electrical Engineering (M&EE) was a strong proponent for increasing the top speed to 140 mph.[9] To facilitate this, tilting train technologies developed for the APT were explored. While BR's board had approved the ordering of a single Class 89 as a prototype, the Strategy Committee queried why the type had been favoured over a proposed 80-tonne Bo-Bo locomotive.[9] While the Class 89 was thought to be a low-risk option for multi-purpose traction, it offered little advantage over the existing Шаблон:Brc in terms of speed. At the time, the 1950s era Шаблон:Brc and Шаблон:Brc electric locomotives were nearing the end of their viable service lives and were quite unreliable, but their withdrawal had effectively been ruled out by a national shortage of newer electric traction, in part caused by the APT's cancellation.[9]

A key advantage of the InterCity 225 concept over a Class 89-hauled consist was the lower weight of the former, resulting in less slippage and greater acceleration over the latter.[9] Appraisals also determined that the Class 89 was comparatively inferior in financial terms, in part due to the InterCity 225's prospective compatibility with WCML traction, reducing its development costs. A further cost-saving measure was the decision to base the InterCity 225's technologies on the APT. BR reportedly stated that it had derived 90% of the former's engineering from the latter.[9] Thus, the study group recommended that the InterCity 225 be pursued as the preferred option, while the Class 89 and HST-E initiatives serve as back-ups. Despite this, the HST-E effort was promptly aborted, while Brush Traction decided to de-prioritise work on the Class 89 after learning that it was unlikely to lead to volume production.[9]

By spring 1984, favour was being given towards the adoption of a tilting carriage, tentatively designated as the Mk 4; this was viewed as superior to the existing Mk 3 and enabled a single design to be shared between the ECML and WCML.[9] At one point, it was envisaged that the InterCity 225 would be extremely ubiquitous, even potentially having the capability built into it to operate over the southern third-rail network and within the Channel Tunnel; by mid 1984, such fanciful ideas were curtailed. Furthermore, it was decided to reduce the freight haulage capabilities of the InterCity 225, as traction for this sector was instead intended to be served via other platforms.[9] The emergence of the Шаблон:Brc, derived from the existing Class 87, somewhat reduced the pressure for the InterCity 225, reducing the prospective numbers to be built of the latter. Without tilting carriages, it had little speed advantage over the Class 90 on the WCML.[9]

It was decided to hold a competitive tender for the InterCity 225 programme; this measure was aimed at avoiding the difficulties experienced with the APT programme.[9] A pre-qualification document was formalised, in which various requirements for the type were laid out; these included the need to perform mixed-traffic duties (day and night passenger, parcel and mail, and overnight heavy freight services), the haulage of both tilting and conventional rolling stock, a top speed of 225Шаблон:Nbspkm/h, a maximum cant deficiency of 9° without the provision of tilt equipment, and that the maximum unsprung mass could not exceed 1.8Шаблон:Nbsptonnes. Furthermore, BR stated its readiness to sub-contract with the successful bidder for the supply of technical information, advice and testing.[9] The prequalification document was issued to BREL, Brush Traction and the General Electric Company (GEC), as well as the French firm Alsthom and Germany's Krauss Maffei. The inclusion of foreign manufacturers was in part due to the limited domestic experience with trainsets capable of such high top speeds.[9] A total of three companies, ASEA, Brush Traction and GEC, submitted tenders for the design and construction of the Class 91 locomotive.[10]

Файл:Crewe Works, Crewe - geograph.org.uk - 663863.jpg
A Шаблон:Brc (90050) and a Class 91 (91020) under construction at Crewe Works in 1990

On 14 February 1985, the BR board approved the substitution of the Class 91 for Class 89 for the ECML programme.[9] The tendering process was relatively complex, but a decisive move appeared to have been GEC's offer of a sub-contracting arrangement to BREL for the construction of the locomotive's mechanical elements. It would be GEC's submission that would be selected as the winner; after which a contract for the construction of 31 Class 91 locomotives, along with an option for 25 more for the WCML, was awarded during February 1986.[4][9] Shortly thereafter, BREL established a production line for the type at its Crewe Works.[9]

Post-introduction developments

The first passenger service to be operated by a Class 91 locomotive was the 17:36 King's Cross to Peterborough on 3 March 1989. From 6 March, members of the fleet began to work services between London and Grantham, and from 11 March services between London and Leeds.[11] With the completion of the East Coast Main Line electrification programme, Class 91 trains reached Newcastle upon Tyne for the first time in service on 10 June 1991, then Edinburgh on 12 June.[11]

In service, as a part of the InterCity 225 sets, the fleet worked alongside Шаблон:Brc locomotives and Шаблон:Brc electric multiple units. Diesel trains displaced by the Class 91 introduction were reallocated predominantly to the Midland Main Line.[4] The InterCity 225's introduction correlated with a significant increase in passenger numbers using the ECML within two years; one station recorded a 58 per cent increase in passengers.[4]

In the early 1990s, after the cancellation of InterCity 250, British Rail examined the option of ordering a further set of ten Class 91s to operate on the West Coast Main Line with UK Treasury support, however the business case for these failed to prove sufficiently worthwhile.[12] and led to the electric Networker Classes 365, 465 and 466 EMU Networker stock's procurement being taken forward.Шаблон:Citation needed

Файл:91115 at Kings Cross 4.jpg
91115 running with the 'blunt' Number 2 end leading at London King's Cross
Файл:Class91bluntendcab.jpg
The No. 2 end driver's cab in a Class 91

The locomotive body is asymmetric; streamlined at the 'front' (Number 1) end Шаблон:Citation needed span, but left 'blunt' at the Number 2 end so as to visually blend with the fixed sets of Mark 4 coaches in normal push-pull passenger service. Because of a design requirement that the class be able to function as normal locomotives if so required, a full driver's cab is also provided at the Number 2 endШаблон:Sndbut the locomotive's maximum speed is reduced to Шаблон:Convert when this cab is at the front of a train.

During the privatisation of British Rail ownership of the Class 91 fleet passed to Eversholt Rail Group, which in turn leased the fleet to its various operators.[11] Eversholt put all 31 locomotives through a £30Шаблон:Nbspmillion heavy overhaul and refit process (Шаблон:Citation needed span) between 2000 and 2003, seeking to improve the fleet's reliability. Rail Magazine described it in March 2001 as being necessary because "eight out of ten failures on Class 91s were caused by the sub-standard electrics", and further noted that problems with relays in particular were the "third-biggest" cause of failures.[11] The refit was performed by Adtranz (later Bombardier Transportation), with technical support from Alstom, and involved upgrades to the bogies, electrical systems, air compressors, and parking brakes; alterations to the cab layout at the Number 1 end; the replacement of the original gearboxes with newly designed Voith models; and the installation of TPWS and a new air-cooling system.[11] Overhauled units had their numbers increased by 100; thus 91001 became 91101 and so onШаблон:Sndwith the exception of 91023, which was renumbered 91132 due to sensitivity around its involvement in both the Hatfield and Selby accidents.[11]

During the overhaul process, GNER hired in Class 90 locomotives to provide cover for their services.[13]

In November 2012, number 91114 had a second pantograph added as a pilot project conducted jointly by Eversholt, East Coast, DB ESG, Wabtec, and Brecknell Willis. The new design uses the same mounting positions as a conventional pantograph but pairs two pantograph arms in an opposing configuration. If there is an ADD (Automatic Dropping Device) activation or the pantograph becomes detached, the train can keep going, so the system provides redundancy in the event of a pantograph/OLE failure.[14][15]

Speed records

Locomotive 91010 (now 91110) holds the British speed record for electric locomotives, reaching Шаблон:Convert while on a test run down the East Coast Main Line's Stoke Bank on 17 September 1989.[16] Locomotive 91012 (now 91112) holds the separate record for the fastest non-stop journey between London King's Cross and Шаблон:Stnlnk; 3Шаблон:NbsphoursШаблон:Nbsp29Шаблон:Nbspminutes on 26 September 1991,[4][17] running within the Шаблон:Cvt speed limit but hauling a shortened set of only five coaches plus DVT. The time converts to an average speed of Шаблон:Convert.

Despite these successes, however, Class 91 locomotives have never used their 140Шаблон:Nbspmph top speed in regular service, because testing conducted by British Rail in 1988 established that drivers could not interpret and act upon line-side signal aspects with sufficient consistency and accuracy when driving at speeds exceeding Шаблон:Cvt.[18] Regulations throughout Britain were subsequently amended to require the use of in-cab signalling whenever running service trains at speeds above 125Шаблон:Nbspmph,[18][19] an option that BR were unwilling to pursue at the time.

Fleet

Файл:Class91cab.jpg
The main (Number 1 end) cab of a Class 91

When British Rail was privatised, the InterCity livery was progressively removed and new operator GNER applied their corporate livery of blue and red. When GNER lost their franchise in 2007, the red stripe was replaced by a white stripe containing the words National Express and East Coast. National Express East Coast originally planned to repaint all of their InterCity 225 sets in the white and silver NXEC corporate livery within two years. However, the collapse of NXEC in 2009 and its replacement with East Coast saw this repainting programme cancelled. As a result, 91111 was the only locomotive to receive the full National Express livery.

In June 2010, a new silver livery with a purple stripe was unveiled by East Coast.[20] By February 2011, locomotives 91101,[21] 91106, 91107 and 91109 carried this livery. Locomotive 91101 was soon given maroon vinyls, with Flying Scotsman branding. Locomotive 91107 was given promotional "Skyfall" vinyls for a time during 2012–3. The locomotive later returned to conventional Virgin Trains East Coast livery. Locomotive 91110 carries 'BBMF' Battle Of Britain Memorial Flight livery. By 2013, all locomotives carried the standard East Coast livery of silver/grey with a purple stripe. 91118 was the last locomotive to carry GNER/NXEC livery. All Mark 4 coaches and DVTs have since been repainted. On 14 October 2014, at Newcastle station, locomotive 91111 was unveiled in a commemorative World War I livery and named 'For The Fallen'.[22]

The Class 91 fleet has carried nameplates applied in various batches and themes. Immediately after repainting into GNER colours in the late 1990s, all locomotives were briefly nameless. Having initially been applied to only a few locomotives in the early 1990s using cast-iron plates, eventually the whole fleet was named, many multiple times, until all were removed in 2008. In 2011, in response to customer requests, East Coast resumed the practice. It began by naming No. 91109 as Sir Bobby Robson with cast-iron plates, unveiled in a ceremony at Newcastle station on 29 March by his widow Elsie and Alan Shearer.[23][24]

List of Class 91 locomotives

Key: In service Stored Scrapped Preserved Exported
Current Number Previous Number Current name Previous name(s) Current livery Built Operator Status Notes

Class 91/1

Class 91/0

91101 91001 Flying Scotsman[25] Шаблон:Ubl LNER InterCity Шаблон:Date table sorting LNER Operational[26]
91102 91002 City of York[27] Durham CathedralШаблон:Hair spaceШаблон:Citation needed Шаблон:Date table sorting Scrapped[26] Scrapped at Sims, Newport, May 2021.[28]
91103 91003 Шаблон:Ubl Шаблон:Date table sorting Scrapped[26] Arrived at C F Booth, Rotherham for scrapping, March 2022.[29] Scrapped in August 2022.[30]
91104 91004 Шаблон:Ubl Шаблон:Date table sorting Scrapped[26] Arrived at C F Booth, Rotherham for scrapping, March 2022.[29]
91000 91005

91105

Шаблон:Ubl LNER InterCity Шаблон:Date table sorting LNER Operational[26] Renumbered January 2024 to celebrate 1000th issue of Rail magazine[31]
91106 91006 East Lothian LNER InterCity[32] Шаблон:Date table sorting LNER Operational[26]
91107 91007 Skyfall[33] Шаблон:Ubl LNER InterCity[26] Шаблон:Date table sorting LNER Operational[26] Was temporarily renumbered back to 91007 for the duration of the Skyfall promotion.[33]
91108 91008 Шаблон:Ubl Шаблон:Date table sorting Scrapped[26] Went off lease in July 2019; first Class 91 locomotive to be withdrawn.[34][35] Scrapped at C F Booth, Rotherham, May 2022.[29]
91109 91009 Sir Bobby Robson[36] Шаблон:Ubl LNER InterCity[32] Шаблон:Date table sorting LNER Operational[26]
91110 91010 Battle of Britain Memorial Flight[37] Шаблон:Ubl Battle of Britain Memorial Flight artwork Шаблон:Date table sorting LNER Operational The locomotive holds the national speed record for electric locomotives of Шаблон:Abbr attained at Stoke Bank near Peterborough on 17 September 1989. Selected for preservation in the National Collection.
91111 91011 For the Fallen[38] Terence CuneoШаблон:Hair spaceШаблон:Citation needed For the Fallen artwork[37] Шаблон:Date table sorting LNER Operational[26] World War I commemoration.
91112 91012 County of Cambridgeshire Шаблон:Date table sorting Scrapped[26] Hauled to Sims, Newport, on 3 February 2023[26]
91113 91013 Шаблон:Ubl Шаблон:Date table sorting Scrapped[26] Scrapped at Sims, Newport, May 2021.[28]
91114 91014 Durham Cathedral[39] Шаблон:Ubl LNER InterCity[32] Шаблон:Date table sorting LNER Operational[26] Previously fitted with experimental two-in-one pantograph.
91115 91015 Blaydon Races[40] Holyrood Шаблон:Date table sorting Scrapped[26] Hauled to Sims, Newport, on 3 February 2023[26]
91116 91016 StrathclydeШаблон:Hair spaceШаблон:Citation needed LNER red/white Шаблон:Date table sorting LNER Stored[26] Currently in warm storage at Belmont Yard, Doncaster.[30]
91117 91017 Шаблон:Ubl Europhoenix Шаблон:Date table sorting Europhoenix Stored[26] Went off-lease on 25 September 2019.[41] Currently stored at Barrow Hill. To be used as a spares donor in the project to reactivate 89001 Avocet.[30]
91118 91018 The Fusiliers[42] Шаблон:Ubl LNER red/white Шаблон:Date table sorting LNER Stored[26] Currently in warm storage at Belmont Yard, Doncaster.[30]
91119 91019 Bounds Green Intercity DepotШаблон:Hair space[43] Шаблон:Ubl BR InterCity 'Swallow'[37] Шаблон:Date table sorting LNER Operational[26]
91120 91020 Royal Armouries Europhoenix Шаблон:Date table sorting Europhoenix Stored[26] On display at Crewe Heritage Centre on long-term loan from Europhoenix.[44]
91121 91021 Шаблон:Ubl LNER red/white Шаблон:Date table sorting LNER Stored[26] Formerly carried pride decorations and was known as the "Trainbow".[45] Currently in warm storage at Belmont Yard, Doncaster.[30]
91122 91022 Шаблон:Ubl Шаблон:Date table sorting Scrapped Used following withdrawal in testing of overhead wires on the Midland Main Line, scrapped in October 2022.[30]
91124 91024 Reverend W AwdryШаблон:Hair spaceШаблон:Citation needed LNER InterCity[32] Шаблон:Date table sorting LNER Operational[26]
91125 91025 Шаблон:Ubl Шаблон:Date table sorting Scrapped[26] Previously carried promotional livery for Sky 1 HD. Hauled to Sims, Newport, on 3 February 2023.[26]
91126 91026 Darlington HippodromeШаблон:Hair space[46] Шаблон:Ubl Шаблон:Date table sorting Scrapped[26] Scrapped at Sims, Newport, May 2021.[28]
91127 91027 Neville Hill[47] Шаблон:Ubl LNER InterCity[32] Шаблон:Date table sorting LNER Operational[26] First locomotive in LNER InterCity livery.[48]
91128 91028 InterCity 50[49] Шаблон:Ubl Шаблон:Date table sorting Scrapped[26] Used following withdrawal in testing of overhead wires on the Midland Main Line, scrapped in July 2022.[30]
91129 91029 Queen Elizabeth IIШаблон:Hair spaceШаблон:Citation needed Шаблон:Date table sorting Scrapped[26] Scrapped at Sims, Newport, May 2021.[28]
91130 91030 Lord Mayor of NewcastleШаблон:Hair space[50] Шаблон:Ubl LNER InterCity Шаблон:Date table sorting LNER Operational[26]
91131 91031 Шаблон:Ubl LNER red/white Шаблон:Date table sorting Preserved[26] Last locomotive built at Crewe Works. Preserved at the Museum of Scottish Railways.[26] [51]
91132 91023 City of Durham[52] Шаблон:Date table sorting Scrapped[26] Involved in both Hatfield and Great Heck accidents. Renumbered 91132 (rather than 91123) after 2001 refurbishment. Scrapped at Sims, Beeston, March 2021.[28]
Table of withdrawals by year
Year Quantity in
service at
start of year
Quantity
withdrawn
Locomotives withdrawn
2019 31 4 91103, 91108, 91117, 91120
2020 27 15 91102, 91104, 91112–91113, 91115–91116, 91118, 91121–91122, 91125–91126, 91128–91129, 91131–91132

Operators

Operator Years Livery Image
InterCity 1988Шаблон:Ndash1996 Intercity Swallow (red, white, and black) 91021 at Peterborough in 1992.
Great North Eastern Railway 1996Шаблон:Ndash2007 Navy blue with red detailing 91101 "City of London" at King's Cross in July 2007.
National Express East Coast 2007Шаблон:Ndash2009 Interim livery (navy blue with white stripe) 91111 at Kings Cross in March 2009.
2007Шаблон:Ndash2009 National Express corporate grey (only used on 91111) 91111 at Kings Cross in March 2009.
East Coast 2009Шаблон:Ndash2015 East Coast silver with purple stripe 91106 at King's Cross in August 2012.
Virgin Trains East Coast 2015Шаблон:Ndash2018 Virgin Trains corporate red and white 91124 at York in April 2015.
London North Eastern Railway 2018Шаблон:Ndash2023 LNER red and white (VTEC red/white with LNER branding) 91125 at King's Cross in July 2018.
2022Шаблон:Ndashpresent LNER InterCity 225 (red, white, and oxblood)[48] 91130 at York railway station in October 2022
Europhoenix 2019Шаблон:Ndashpresent Europhoenix grey, silver, and red (with a phoenix motif branding) 91117 at Leicester TMD in October 2019.

Current operations

The fleet, which was previously operated by InterCity and then GNER, National Express East Coast, East Coast and Virgin Trains East Coast, is currently run by London North Eastern Railway.

In July 2019, 91108 was the first of the class to be withdrawn.[53] Following the withdrawal of the InterCity 125 fleet in December 2019, it was previously thought that the InterCity 225 fleet would be fully withdrawn by June 2020.[54] However, LNER announced on 29 January 2020 that they would be retaining a limited number of the InterCity 225 fleet to deliver all of the benefits of their December 2021 timetable.[55] LNER later confirmed that they would be keeping 10 sets in service.[56]

In September 2020, Eversholt Rail Group and London North Eastern Railway extended their lease to ten by 2023. In addition, there are options to make it operational until 2024. It will be overhauled at the Wabtec Doncaster plant.[57][58]

At the end of service on 15 January 2021, the remaining serviceable InterCity 225 sets went into storage temporarily as part of the East Coast Upgrade.[59] Originally, the plan was to return the sets to service for 7 June 2021, but instead the first set re-entered service on 11 May 2021 due to a number of Azuma sets having to be taken out of service.[60]

Future operations

Europhoenix purchased 91117 and 91120 in September 2019. They were repainted at Bounds Green TMD before moving to UK Rail Leasing's Leicester depot. They are to be re-geared for freight operation in Europe.[61] In September 2022, 91120 moved to Crewe Heritage Centre on long-term loan from Europhoenix.

Rail Operations Group have taken a pair of Class 91s for use in testing of the newly electrified Midland Main Line prior to the introduction of regular electric services between Шаблон:Stnlnk and Шаблон:Stnlnk.[62] The company has also expressed interest in using the Class 91s on high speed logistics trains.[63]

Grand Union is proposing to operate InterCity 225s on London Paddington to Cardiff Central and London Euston to Stirling services.[64][65]

Scrapping

91132 was the first Class 91 to be scrapped, at Sims Metals scrapyard in Nottingham in 2021.[52]

Preservation

91110 and 91111 have been nominated by the Railway Heritage Committee to be preserved as part of the National Collection, upon their retirement.[66]

In June 2021, the 225 Group was launched; their intention is to preserve a further Class 91 and an InterCity 225 set.[67]

In September 2022, Crewe Heritage Centre received 91120 on long-term loan from Europhoenix.[44]

In March 2023, 91131 moved to preservation at the Museum of Scottish Railways at the Bo'ness and Kinneil Railway.[51][68]

Notes

Шаблон:Notefoot

References

Шаблон:Reflist

Literature

External links

Шаблон:Commons category

Шаблон:British Rail Locomotives Шаблон:General Electric Company plc

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