8445 - the SNCF co-co CC7107

(in its second guise with no black backing to numbers and fitted with roof-mounted horns but with original chassis.) 

See here for the earlier version

Prototype information:

These robust machines, derived from Alsthom's CC7000 prototype and introduced after the second world war, were the first DC locomotives to run at more than 100 km/h. Having a co-co configuration with six driven axles, they superseded the 2D2 9100's on many express trains in particular the 'Mistral' on the Paris-Lyon-Marseilles line as the electrification advanced towards the south.

Whilst the MTE group was still developing their BB9003 and 9004 prototypes, loco CC7121 smashed the world record for rail speed by reaching 243 km/h on a trial run on the PLM line between Dijon and Beaune. On March 28th and 29th 1955, after several months of tests, the CC7107 and BB9004 together reached 331 km/h on the line between Bordeaux and Hendaye in what was a new world record. The train was made up of three type DEV passenger coaches of 1946 which were sufficiently streamlined to allow low drag forces at high speed. During these high speed tests the ride of the CC7107 deteriorated following the considerable lateral forces which resulted from the destruction of the rubber silent-block bump stops.

As high speed current collection was not sufficiently understood at the time the pantograph head on CC7107 was dislodged after achieving the maximum speed, causing an impressive arc to be drawn. These tests resulted in a great deal of information being gathered which allowed very high speeds to be run in France - up to 200 km/h with the famous Mistral in 1967 then even higher with TGV in the 1970's.

However following the introduction of the BB9200's which ran at 160 km/h the CC7100's began to be overshadowed. The arrival of more classes of locos gradually confined them to freight trains. Still used sporadically to top and tail push-pull sets and particularly on freight, the CC7100 class was slowly reduced to five examples at the beginning of 2001. Locos CC7102, 7105, 7110, 7126 and 7140 then continued to work around Lyon, Dijon, Miramas and Narbonne on light duties.

Finally driven out by the BB27000's , the withdrawal of the last locomotive took place in December 2001 after a career spanning 49 years.


No: Built :


World beaters

Here are the two record breaking locos together at Paris Gare de Lyon in the 1950's (SNCF)


and CC7107 at Utrecht on 25th June 1989

Picture courtesy Nico Spilt

Operating area : 

South East and South West regions

Number range:

7101 - 7158


1500v DC


 5060 HP

Maximum speed: 

150 km/h (95 mile/h)

In February 1954 CC7121 achieved the then fastest ever speed run on rails when it hit 151 mile/h. On 28th and 29th March 1955 sister locomotive CC7107 and BB9004 (with 3 coaches having a trailing load of 103.5 tonnes) broke this record when they achieved a speed of 331 km/h (205 mile/h). During the trial the loco output was in the order of 12,000 HP! The site was between Caudos and Morcenx on the 1.5Kv dc line between Bordeaux and Hendaye which is a 29 mile straight with a two-mile radius curved section

.331km/h plaque.

and to prove it here's the plaque which was fitted to the locomotives afterwards

(Both locos have been preserved)


107 tonnes



Date entered service: 

Withdrawn 2001