| British Rail Class 91 | |||||||||||||||||||||||||||||||||||||||||||||||||||||
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 LNER Class 91 at London King's Cross | |||||||||||||||||||||||||||||||||||||||||||||||||||||
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The British Rail Class 91 is a high-speed electric locomotive, which produces power of 4,830 kW (6,480 hp); 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 225 km/h (140 mph); 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.[2][5]
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.
- ^ a b c d e f g h i j k l m n Fawcett, M. (April 2008). Vehicle Diagram Book - Class 91 Locomotive (1 ed.). London: HSBC Rail UK. EV/DB0910. Archived from the original on 6 May 2021. Retrieved 6 May 2021.
- ^ a b c d e f g h Kaller, Roger; Allenbach, Jean-Marc (1995). Traction électrique (PDF) (in French). Lausanne: Presses polytechniques et universitaires romandes. p. 8.2.91. Archived (PDF) from the original on 14 May 2021. Retrieved 25 April 2012.
- ^ a b c Railway Industry Association (1988). "Elektrische Lokomotive Klasse 91 - Technische Daten / Class 91 Electric Locomotive - Technical Information" (JPEG). Grossbritanniens Neue Eisenbahnen / Britain's New Railways (in German and English). London: British Railways Board. Archived from the original on 19 November 2022.
- ^ a b System Data for Mechanical and Electrical Coupling of Rail Vehicles in support of GM/RT2190 (PDF). London: Rail Safety and Standards Board. 22 June 2011. SD001. Archived from the original (PDF) on 1 April 2012. Retrieved 22 November 2022.
- ^ a b Donnison, P.J.; West, G.R. (September 1989). "The design and development of the Class 91 locomotive". International Conference on Main Line Railway Electrification 1989: 294–298.
- ^ Clinnick, Richard (10 October 2019). "Europhoenix earmarks '91s' for European freight use". Rail Magazine. Peterborough: Bauer Consumer Media. Archived from the original on 12 October 2019. Retrieved 12 October 2019.
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