Ligier JS7

{{short description|Formula One race car}}

{{Infobox racing car

| Car_name = Ligier JS7

| Image =

| Category = Formula One

| Constructor = Ligier

| Team = Ligier Gitanes

| Designer = Gérard Ducarouge (Technical Director)
Michel Beaujon (Chief Designer)
Robert Choulet (Head of Aerodynamics)

| Predecessor = JS5

| Successor = JS9

| Drivers = {{flagicon|FRA}} Jacques Laffite
{{flagicon|FRA}} Jean-Pierre Jarier

| Technical ref = [http://www.statsf1.com/es/ligier-js7.aspx Ligier JS7 @ StatsF1]

| Chassis = Aluminium monocoque

| Front suspension =

| Rear suspension =

| Wheelbase = {{convert|2608|mm|in||abbr=on}}

| Track = Front: {{convert|1536|mm|in||abbr=on}}
Rear: {{convert|1600|mm|in||abbr=on}}

| Engine name = Matra MS76,

| Configuration = 60° V12,

| Capacity = {{convert|2993|cc|cuin|1|abbr=on}},

| Turbo/NA = NA,

| Engine position = mid-engine, longitudinally mounted

| Gearbox name = Hewland 2-200 TL

| Gears = 6-speed

| Type = manual

| Differential =

| Tyres = Goodyear

| Weight = {{convert|580|kg|lb||abbr=on}}

| Fuel = Shell

| Debut = 1977 Argentine Grand Prix

|First_win=1977 Swedish Grand Prix

|Last_win=1977 Swedish Grand Prix

|Last_event=1978 Swedish Grand Prix

| Races = 23

| Cons_champ = 0

| Drivers_champ = 0

| Wins = 1

| Poles = 0

| Fastest_laps = 1

}}

The Ligier JS7 was the second Formula One racing car made by Ligier. As with the preceding JS5, the letters "JS" were in tribute to Guy Ligier's friend Jo Schlesser who was killed in the 1968 French Grand Prix.

Aside from using the Matra V12 rather than the usual Ford 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.{{cite journal | ref=lA0177 | journal=L'Automobile | page= 74 | title= Nouveautés F1 1977 |trans-title= F1 News 1977 | language = French | editor-last= Thevenet | editor-first= Jean-Paul | location=Neuilly, France | number= 367 | date=January 1977 | publisher=Societé des Editions Techniques et Touristiques de France }} The front wing design echoed that of the Ferrari 312T.

The JS7 competed in the 1977 Formula One season and the first two races of the 1978 season. An updated version, dubbed the JS7/9 was used for three races in 1978 until the definitive 1978 car, the JS9 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.{{cite web|last1=Brown|first1=Allen|title=Ligier JS7 car-by-car histories|url=http://www.oldracingcars.com/ligier/js7/|website=oldracingcars.com|accessdate=22 September 2017}}

{{Clear}}