SNCF's CC 7100 class are part of a series of electric locomotives built by Alstom. The prototype 'CC 7000' (7001 & 7002) were built in 1949 and the production series locomotives CC 7101-CC 7158 followed during 1952–1955. Two of the class are notable for setting world rail speed records: CC 7121 reaching 243 kilometres per hour (151 mph) on 21 February 1954, and CC 7107 reaching 331 kilometres per hour (206 mph) on 28/29 March 1955.[2]
Prototype, as delivered, with the original valances and windscreen
The CC 7100 class were the first SNCF high-speed locomotives in which all the axles were motorized, i.e. with powered bogies rather a rigid frame. As delivered their top speed was 150 kilometres per hour (93.2 mph).
The CC 7100 were contemporaries of the 2D2 9100 for express passenger service on the PLM. From the outset it was apparent that bogie locomotives represented the future and so only a third of the anticipated 2D2s were built, in favour of the CC 7100.[3][4]
Speed recordsedit
During the 1950s, SNCF's experimental investigations into high-speed rail saw some CC 7100 class locomotives specially-modified for operation at speeds far higher than their regular service speed. These experiments provided valuable test data for the SNCF to develop increasingly more rapid regular services, including the 200 kilometres per hour (124 mph) Mistral of 1967, and ultimately the TGV.[2]
CC 7121 broke the rail speed record when it achieved 243 kilometres per hour (151 mph) on the PLM mainline between Dijon and Beaune on 21 February 1954.
Preparations for further high-speed tests proceeded, and in March 1955 CC 7107 and Bo-Bo locomotive BB 9004 both attained 331 kilometres per hour (206 mph) on separate high-speed runs between Bordeaux and Dax, Landes. CC 7107 hauled a three car train with streamlining modifications to reduce aerodynamicdrag.[2]
The locos were all given a "GRG" (major refurbishment) in the early 1980s to remove the original "skirts", and to replace the original windscreens and head/tail lamps clusters with "standard SNCF" arrangement. They replaced the 2D2 9100 in their last passenger service.
Certain class members were fitted with third rail pick up shoes to work Chambéry-Modane services. The shoes were removed in 1976.[6]
Despite their high-speed credentials, the CC 7100 class was relegated to freight haulage duties as more modern electric locomotives, commencing with the BB 9200 class, replaced them on passenger services.
Withdrawal and preservationedit
CC 7107 in Germany, 4 September 2006
By 2001, the class was reduced to just five operating examples. The introduction of the BB 27000 class dual voltage freight locomotives led to the final withdrawal of these last locomotives from regular service.
Together with fellow record holder BB 9004, CC 7107 was towed to Germany in 2006 to be present for No 1216 050's record breaking run.[5]
^ ab"Railway Gazette: Taurus puts 1955 French speed record holders in the shade". Railway Gazette. 2006-10-01. Retrieved 2015-01-16.
^Marco van Uden. "SNCF withdrawn electric locomotives". Retrieved 2008-01-27.
Hollingsworth, Brian; Cook, Arthur (2000). Modern Locomotives. ISBN0-86288-351-2.
External linksedit
Wikimedia Commons has media related to SNCF Class CC 7100.
Archival footage of the 1955 speed record
October 27, 2023
sncf, class, 7100, sncf, 7100, class, part, series, electric, locomotives, built, alstom, prototype, 7000, 7001, 7002, were, built, 1949, production, series, locomotives, 7101, 7158, followed, during, 1952, 1955, class, notable, setting, world, rail, speed, re. SNCF s CC 7100 class are part of a series of electric locomotives built by Alstom The prototype CC 7000 7001 amp 7002 were built in 1949 and the production series locomotives CC 7101 CC 7158 followed during 1952 1955 Two of the class are notable for setting world rail speed records CC 7121 reaching 243 kilometres per hour 151 mph on 21 February 1954 and CC 7107 reaching 331 kilometres per hour 206 mph on 28 29 March 1955 2 Class CC 7100SNCF CC 7102 at Le Mee sur SeineType and originPower typeElectricBuilderAlstomBuild date1952 1955Total produced58SpecificationsConfiguration UICCo Co Gauge1 435 mm 4 ft 8 1 2 in Driver dia 1 250 mm 49 21 in Length18 922 m 62 ft 1 in Width2 968 m 9 ft 9 in 1 Height4 218 m 13 ft 10 in 1 Loco weight107 t 105 long tons 118 short tons Electric system s1 5 kV DC CatenaryCurrent pickup s PantographPerformance figuresMaximum speed140 km h 87 mph Power output3 490 kW 4 680 hp Tractive effort260 kN 58 000 lbf CareerOperatorsSNCFClassCC 7100Retired1985 2001Disposition5 Preserved Contents 1 History 1 1 Speed records 1 2 Later years 1 3 Withdrawal and preservation 2 Preserved locomotives 3 References 4 External linksHistory edit nbsp Prototype as delivered with the original valances and windscreenThe CC 7100 class were the first SNCF high speed locomotives in which all the axles were motorized i e with powered bogies rather a rigid frame As delivered their top speed was 150 kilometres per hour 93 2 mph The CC 7100 were contemporaries of the 2D2 9100 for express passenger service on the PLM From the outset it was apparent that bogie locomotives represented the future and so only a third of the anticipated 2D2s were built in favour of the CC 7100 3 4 Speed records edit During the 1950s SNCF s experimental investigations into high speed rail saw some CC 7100 class locomotives specially modified for operation at speeds far higher than their regular service speed These experiments provided valuable test data for the SNCF to develop increasingly more rapid regular services including the 200 kilometres per hour 124 mph Mistral of 1967 and ultimately the TGV 2 CC 7121 broke the rail speed record when it achieved 243 kilometres per hour 151 mph on the PLM mainline between Dijon and Beaune on 21 February 1954 Preparations for further high speed tests proceeded and in March 1955 CC 7107 and Bo Bo locomotive BB 9004 both attained 331 kilometres per hour 206 mph on separate high speed runs between Bordeaux and Dax Landes CC 7107 hauled a three car train with streamlining modifications to reduce aerodynamic drag 2 Although the rail speed record has since 1990 been repeatedly broken by high speed trainsets such as the French TGV and the German InterCityExperimental trains BB 9004 and CC 7107 retained the locomotive speed record for over 50 years until it was broken on 2 September 2006 by a Siemens Taurus locomotive OBB No 1216 050 which attained 357 kilometres per hour 222 mph hauling a single dynamometer car on the Nuremberg Ingolstadt high speed railway in Germany 5 Later years edit The locos were all given a GRG major refurbishment in the early 1980s to remove the original skirts and to replace the original windscreens and head tail lamps clusters with standard SNCF arrangement They replaced the 2D2 9100 in their last passenger service Certain class members were fitted with third rail pick up shoes to work Chambery Modane services The shoes were removed in 1976 6 Despite their high speed credentials the CC 7100 class was relegated to freight haulage duties as more modern electric locomotives commencing with the BB 9200 class replaced them on passenger services Withdrawal and preservation edit nbsp CC 7107 in Germany 4 September 2006By 2001 the class was reduced to just five operating examples The introduction of the BB 27000 class dual voltage freight locomotives led to the final withdrawal of these last locomotives from regular service Together with fellow record holder BB 9004 CC 7107 was towed to Germany in 2006 to be present for No 1216 050 s record breaking run 5 Preserved locomotives editCC 7002 Amberieu CC 7102 Chambery CC 7106 Amberieu CC 7107 Mulhouse at the Cite du train museum CC 7121 Miramas CC 7140 Breil sur RoyaReferences edit a b CC 7100 Uxtobirza free fr Retrieved 2022 04 20 a b c SNCF co co electric CC 7107 Jouef Trains Retrieved 2009 04 18 Modern Locomotives 2000 pp 98 99 Class 9100 2 Do 2 Modern Locomotives 2000 pp 108 109 Class CC7100 Co Co a b Railway Gazette Taurus puts 1955 French speed record holders in the shade Railway Gazette 2006 10 01 Retrieved 2015 01 16 Marco van Uden SNCF withdrawn electric locomotives Retrieved 2008 01 27 Hollingsworth Brian Cook Arthur 2000 Modern Locomotives ISBN 0 86288 351 2 External links edit nbsp Wikimedia Commons has media related to SNCF Class CC 7100 Archival footage of the 1955 speed record Retrieved from https en wikipedia org w index php title SNCF Class CC 7100 amp oldid 1181268997, wikipedia, wiki, book, books, library,
