Ligier JS11

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Ligier JS11
Ligier JS11/15
The JS11 being demonstrated at the 2008 Goodwood Festival of Speed
Category Formula One
Constructor Ligier
Designer(s) Gérard Ducarouge
Michel Beaujon
Robert Choulet
Predecessor JS9
Successor JS17
Technical specifications[1]
Chassis Aluminium monocoque
Axle track Front: 1,738 mm (68.4 in)
Rear: 1,600 mm (63 in)
Wheelbase 2,794 mm (110.0 in)
Engine Ford Cosworth DFV, 2,993 cc (182.6 cu in), 60° V8, NA, mid-engine, longitudinally mounted
Transmission Hewland FGA 400, 6-speed manual
Weight 580 kg (1,280 lb)
Fuel Shell
Tyres Goodyear
Competition history
Notable entrants Ligier Gitanes
Notable drivers France Jacques Laffite (1979–80)
France Patrick Depailler (1979)
Belgium Jacky Ickx (1979)
France Didier Pironi (1980)
Debut 1979 Argentine Grand Prix
Races Wins Poles F.Laps
29 5 6 6
Constructors' Championships 0
Drivers' Championships 0

The Ligier JS11 was a ground effect Formula One car designed by Gérard Ducarouge. It was powered by the Ford Cosworth DFV married to a Ligier in-house built gearbox. It competed in the 1979 and 1980 World Championships and proved to be very competitive.

Driven by Jacques Laffite, the car won the first two races of the 1979 season and scored consistently. The Ligiers stayed in contention throughout the season, with Patrick Depailler winning a further race in Spain. The team eventually finished third behind Ferrari and Williams in the constructors' championship. Depailler was injured halfway through the season in a hang-gliding accident and was replaced by Jacky Ickx, but he struggled to keep pace with the car and his team mate and left at the end of the season, having scored only a handful of points.


For 1980, the JS11 was updated with improved aerodynamics and better ground effects. The team took on Didier Pironi in place of Depailler. Again the car was fast and competitive, but the Brabham BT49 and the Williams FW07 proved to be the cars to beat, with Alan Jones taking the world championship. Even so, the team still scored two wins, and would surely have taken more but for several suspension and tyre failures in the mid season. The car was producing so much downforce that the suspension and wheelhubs were coming under direct loading and therefore stress fractures developed. This was due to the immense pressure exerted on the suspension arms and the wheels by the ground effect, causing them to fail under hard braking. This effectively cost Ligier the chance to fight with Williams and Brabham for both titles.

The team finished second in the constructors' championship in 1980 ahead of Brabham, and the JS11 evolved into the JS17 for 1981. The JS11 was used as a primary test car for Michelin to experiment with their tyres.

In all the JS11 took five wins, seven pole positions and scored 127 points in its career.


The JS11 appeared in the toy line and cartoon Transformers as the Autobot Mirage. To escape possible royalties and most likely dodge regulations in various countries regarding tobacco livery on toys, the "Gitanes" logo on Laffite's JS11 was changed to "Citanes". In Italy, the logo was changed furthermore to "Ligier".