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Adriano Saad
Adriano Saad
BR

Ligier Ford JS11 1979
Tamiya Ligier Ford JS11

Subject:
Ligier JS 11
FR FIA Formula 1
Equipe Ligier Gitanes 26 (Jacques Laffite)
1979 FIA Formula 1 season
French Blue
Scale:
1:20
Status:
Completed
Started:
November 14, 2020
Completed:
April 16, 2021

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 teammate and left at the end of the season, having scored only a handful of points.

However, the car soon proved to have problems, starting at the fourth race of the season at Long Beach in the United States. The car was in fact so efficient at producing downforce that the aluminium chassis simply could not handle the amount of downforce it was producing. As a result the chassis began to flex and the skirts would then be lifted off the ground, ruining the ground effect suction. This was an issue that hampered the team throughout the season, and it could not be solved in time for Laffite to properly challenge the Ferraris of Jody Scheckter and Gilles Villeneuve, and later the all-dominant Williams of Alan Jones.

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. Although the chassis flexing issues had been solved, the car was still 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.

To solve the issues with the increased downforce, Gérard Ducarouge came up with a solution, dubbed the "clapet" (French for "valve"), where in a series of flaps within the venturi tunnels would open up at after a certain amount of pressure. As the solution constituted a movable aerodynamic device, the team did its best to keep the existence of the system a secret. The existence of the system was eventually discovered by F1 technical illustrator Giorgio Piola during the final race of the 1980 season at Watkins Glen. Piola was able to take photographs of the system after one of the two cars entered by Ligier was being repaired after a shunt.

From en.wikipedia.org/wiki/Ligier_JS11

Unfortunate, bad decals impact a lot the results. Sorry.

Project inventory

Full kits
20012
1979
Ligier JS11 Ford F-1
Tamiya 1:20
20012 1987 New box
Detail and Conversion sets
P-986
DFV Engine Cam Cover set
Model Factory Hiro (MFH) 1:20
P-986 2012 New tool
/search.php?q=*&fkMATEID[]=20872&showast=no&fkWORKBENCH[]=WB20872&page=projects&project=94802
 
 

Photoalbums

Ligier JS11 Ford
61 images
View album, image #1
1:20
1:20 Ligier JS11 Ford F-1 (Tamiya 20012)1:20 DFV Engine Cam Cover set (Model Factory Hiro P-986)

Part of my Collection

F1 Cars
Completed 14×

Comments

23 February 2021, 16:55

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