| Category | Formula One | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Constructor | Ligier | ||||||||
| Designers | Gérard Ducarouge (Technical Director) Michel Beaujon (Chief Designer) Robert Choulet (Head of Aerodynamics) | ||||||||
| Predecessor | JS5 | ||||||||
| Successor | JS9 | ||||||||
| Technical specifications[1] | |||||||||
| Chassis | Aluminiummonocoque | ||||||||
| Axle track | Front: 1,536 mm (60.5 in) Rear: 1,600 mm (63 in) | ||||||||
| Wheelbase | 2,608 mm (102.7 in) | ||||||||
| Engine | Matra MS76, 2,993 cc (182.6 cu in), 60°V12,NA,mid-engine,longitudinally mounted | ||||||||
| Transmission | Hewland 2-200 TL 6-speedmanual | ||||||||
| Weight | 580 kg (1,280 lb) | ||||||||
| Fuel | Shell | ||||||||
| Tyres | Goodyear | ||||||||
| Competition history | |||||||||
| Notable entrants | LigierGitanes | ||||||||
| Notable drivers |  Jacques LaffiteJean-Pierre Jarier | ||||||||
| Debut | 1977 Argentine Grand Prix | ||||||||
| First win | 1977 Swedish Grand Prix | ||||||||
| Last win | 1977 Swedish Grand Prix | ||||||||
| Last event | 1978 Swedish Grand Prix | ||||||||
| |||||||||
| Constructors' Championships | 0 | ||||||||
| Drivers' Championships | 0 | ||||||||
TheLigier JS7 was aFormula Oneracing car manufactured byLigier. As with the precedingJS5, the letters "JS" were in tribute toGuy Ligier's friendJo Schlesser who was killed in the1968 French Grand Prix.
Aside from using the Matra V12 rather than the usualFord Cosworth unit, the JS7 was a very conventional design with a Hewland six-speed transmission and a longitudinally mounted engine and wishbone suspension. The JS7 forwent the giant air intake of the preceding JS5.[2] The front wing design echoed that of theFerrari 312T.
The JS7 competed in the1977 Formula One season and the first two races of the1978 season. An updated version, dubbed theJS7/9 was used for three races in 1978 until the definitive 1978 car, theJS9 was ready. Laffite's victory in the 1977 Swedish Grand Prix was the first all-French victory - chassis, engine and driver - in World Championship history.[3]
(key)
| Year | Chassis | Engine | Tyres | Drivers | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | Points | WCC |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1977 | JS7 | MatraV12 | G | ARG | BRA | RSA | USW | ESP | MON | BEL | SWE | FRA | GBR | GER | AUT | NED | ITA | USA | CAN | JPN | 18 | 8th | |
| Jacques Laffite | NC | Ret | Ret | 9 | 7 | 7 | Ret | 1 | 8 | 6 | Ret | Ret | 2 | 8 | 7 | Ret | 5 | ||||||
| Jean-Pierre Jarier | Ret | ||||||||||||||||||||||
| 1978 | JS7 | MatraV12 | G | ARG | BRA | RSA | USW | MON | BEL | ESP | SWE | FRA | GBR | GER | AUT | NED | ITA | USA | CAN | 19* | 6th | ||
| Jacques Laffite | 16 | 9 | 5 | ||||||||||||||||||||
| JS7/9 | 5 | 5 | 7 |
* 13 points scored using the JS9.
