 | |||||||||
| Category | Formula One | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Constructor | Ligier | ||||||||
| Designer(s) | Gérard Ducarouge (Technical Director) Michel Beaujon (Chief Designer) Robert Choulet (Head of Aerodynamics) | ||||||||
| Predecessor | JS7 | ||||||||
| Successor | JS11 | ||||||||
| Technical specifications[1] | |||||||||
| Chassis | Aluminiummonocoque | ||||||||
| Axle track | Front: 1,625 mm (64.0 in) Rear: 1,515 mm (59.6 in) | ||||||||
| Wheelbase | 2,800 mm (110 in) | ||||||||
| Engine | Matra MS76, 2,993 cc (182.6 cu in), 60°V12,NA,mid-engine,longitudinally mounted | ||||||||
| Transmission | Hewland FGA 400, 6-speedmanual | ||||||||
| Weight | 580 kg (1,280 lb) | ||||||||
| Fuel | Shell | ||||||||
| Tyres | Goodyear | ||||||||
| Competition history | |||||||||
| Notable entrants | LigierGitanes | ||||||||
| Notable drivers |  Jacques Laffite | ||||||||
| Debut | 1978 Spanish Grand Prix | ||||||||
| Last event | 1978 Canadian Grand Prix | ||||||||
| |||||||||
| Constructors' Championships | 0 | ||||||||
| Drivers' Championships | 0 | ||||||||
TheLigier JS9 was aFormula Oneracing car manufactured and raced byLigier during the1978 Formula One season. Driven by FrenchmanJacques Laffite, its best finish was third (twice).
The JS9 was designed byGérard Ducarouge and Michel Beaujon, with Robert Choulet working on aerodynamics.[1] The JS9 had a large rear wing, but did not use the ground effects aerodynamics that was being developed by Lotus and other teams.[2] The Hewland TL200 gearbox of the previous year was upgraded to the more lightweight Hewland FGA 6-speed and it continued to use the Matra MS76 V12 engine.[2] However development of the V12 ceased during the year which may have affected the results achieved by the car. A total of two JS9 chassis were built, with the second of these having revised suspension.[3]
The JS9 was the last Ligier car that used a Matra V12 with the 1979 car being designed around a Cosworth engine.[3]
For the1978 season, Ligier continued to run a single entry forJacques Laffite, the team's regular driver.[1] After completing the first six races of the season with the JS7 and JS7/9 (a hybrid car),[3] the JS9 made its debut at theMonaco Grand Prix. Laffite qualified it fifteenth on the grid and in the race itself retired with gearbox issues. At the next race in which the JS9 ran, theSpanish Grand Prix, he finished on the podium in third, having qualified tenth. After finishing out of the points for the next three races, he finished third again inGermany, this time from seventh on the grid.[1]
With Laffite now driving the second of the two JS9 chassis that had been built,[3] two further points finishes were achieved, a fifth inAustria (having qualified fifth, the best starting position Lafitte achieved with the JS9) and fourth inItaly. Laffite enjoyed good reliability, retiring from just two races, Monaco and the season endingCanadian Grand Prix.[1]
(key) (Results inbold indicate pole position; results initalics indicate fastest lap)
| Year | Team | Engine | Tyres | Drivers | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | Points | WCC |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1978 | Équipe Ligier | Matra MS76 | G | ARG | BRA | RSA | USW | MON | BEL | ESP | SWE | FRA | GBR | GER | AUT | NED | ITA | USA | CAN | 19* | 6th | |
| Jacques Laffite | Ret | 3 | 7 | 10 | 3 | 5 | 8 | 4 | 11 | Ret |
* 6 points scored in 1978 were with the JS7 and JS7/9
