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Ligier JS3

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Ligier JS3
ConstructorAutomobiles Ligier
Designer(s)Michel Têtu
PredecessorNone
SuccessorNone
Technical specifications
Suspension (front)Double wishbones with coilover dampers.[1]
Suspension (rear)Double wishbones with coilover dampers, radius arms, anti-roll bar.[1]
Length3,500 mm (137.8 in)[2]
Width1,960 mm (77.2 in)[2]
Height750 mm (29.5 in)[2]
Axle track1,560 mm (61.4 in)[2]
Wheelbase2,250 mm (88.6 in)[3][4]
EngineCosworth DFV[3] 2,993 cc (182.6 cu in)[3] V8 (90°).[3] Normally aspirated. Mid
TransmissionHewland[4] 5-speed[3]
Weight650 kg (1,433.0 lb)[3][4]
Competition history
Notable entrantsAutomobiles Ligier
Notable driversGuy Ligier
Patrick Depailler
EntriesRacesWinsPodiums
6[5]6[5]1[5]2[5]
PolesF/Laps
0[5]1

The Ligier JS3 is a sports-racing car built by Automobiles Ligier. It was unveiled in 1971 and ended its competition life the same year. Only one JS3, chassis JS3-01, was ever built.[4]

The Car

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The JS3 was designed in late 1970 by Michel Têtu.[6] Two scale models of the car were built and tested at the Eiffel wind tunnel late in January 1971 before choosing one to become the final design.[2] In contrast to the dual-purpose JS1 fixed-head coupé, the JS3 was an open-top two-door two-seat "barquette" meant exclusively for circuit racing.[2][1] Like the JS1, the JS3 was named to honour company owner Guy Ligier's former teammate, business partner and close friend Jo Schlesser who died in his 3rd Formula 1 race.

The chassis was a combination of the techniques Têtu used for the JS1 and contemporary Formula 1 practice, resulting in a monocoque of Klegecell-PVC/aluminum-sheet panels and TMAW-welded aluminum.[7][8][9][10][11]

Ligier chose Cosworth to supply the engine. The JS3 did not use the four-cylinder FVA found in the JS1 but instead got a 2993cc DFV V8 capable of producing more than 400 bhp.[3][12][13] This engine had already had considerable success in Formula 1, but far less success in sportscar racing.[14] Keith Duckworth himself felt that the DFV's flat-plane crankshaft would limit the engine's reliability and, thus, potential success, in endurance racing events.[15][16] The DFV-powered Ford P68 and Ford P69 designed by Len Bailey, for example, were unsuccessful[14]

The Cosworth DFV engine was mated to a 5-speed Hewland transaxle. The particular transaxle used has been reported to have been either an FG400[4] Formula 1 model or a DG300[7] sports-racer model.

The engine was mounted as a stressed-member in the chassis, although during restoration it was noted that the way the loads were fed into the tub was not optimal.[17][1][9]

Ligier's purpose for building this car was to win the 24 Heures du Mans.[18][19]

The JS3 was officially unveiled on March 15, 1971, at Automobiles Ligier's Vichy workshops.[6] It wore the distinctive green-and-yellow livery of the car's sponsor, British Petroleum.[18]

Racing history

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Ligier JS3 complete competition history, 1971[20][10]
Date Event Circuit Number Driver(s) Results
April 18th Le Mans test day Circuit de la Sarthe 32 France Guy Ligier Posted 7th fastest time and 1st in the 3-litre class.
April 18th 3 Heures du Mans Circuit de la Sarthe 32 France Guy Ligier 2nd place.
April 25th Coupe de Printemps Autodrome de Linas-Montlhéry 10 France Guy Ligier Best lap and win.
May 9th Criterium du Nivernais Circuit de Nevers Magny-Cours 106 France Guy Ligier DNF.
May 23rd Coupes de Vitesse Autodrome de Linas-Montlhéry 10 France Guy Ligier DNF.
June 13th 24 Heures du Mans Circuit de la Sarthe 24 France Guy Ligier
France Patrick Depailler		 Qualified 17th. Not classified.

At the 24 Heures du Mans the car was driven by Guy Ligier and Patrick Depailler. For the first time the bodywork incorporates headlamps for night driving.[21] Qualifying times are not as impressive as they were during the test days, with the JS3 coming in 17th at the end of qualifying with a time of 3:39.800. 18 hours into the race the team was running in fifth place when the car developed gearbox problems.[17] Ligier decided to attempt a repair, and the Gulf 917 team of John Wyer offered a spare transaxle. Adapting a transmission meant to bolt up to a Porsche engine to the JS3's Cosworth took the mechanics four hours of time in the pits.[10] The car rejoined the race far behind the leaders, and crossed the finish line having completed only 270 laps, 127 fewer than the winners and too few for the car to be classified.[22] It was the only car in its class to finish, and was the first DFV-powered two-seater to race and finish at Le Mans.[23]

While the car typically ran with long-tail bodywork appropriate to high-speed courses, it had a short-tail body at the Criterium du Nivernais.[19][21][10]

The car languished at Ligier's Vichy works until it was acquired by Jacques Laffitte in lieu of payment.[24] It was later acquired by Peter Morley cars, and then passed to Nicholas Zapata, who had it restored and raced by Willie Green debut at Coys and win at the annual six-hour classic race at Spa in 2001 and at the 24 Heures du Mans Legend race in 2003.[24][7][25][26] The JS3 was sold to Pierre Bardignon's Mas du Clos and then to Jean Guittard, who raced under the pseudonym of "Mr. John of B".[22] A complete restoration to original specifications was done in 1999 by Simon Hadfield with Geoff Wyatt.[13][1][9] It was offered at Christies in Paris in 2016.[1] Subsequent owners included Mike Jankowski and Jacques Nicolet.[27]

Historic racing appearances

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The JS3 has appeared at the following historic racing events:[27]

  • 2016 Imola Classic
  • 2016 Jarama Classic
  • 2015 Dix Mille Tours
  • 2015 Monza Historic
  • 2015 Grand Prix de l'Age d'Or
  • 2014 Dix Mille Tours
  • 2014 Le Mans Classic
  • 2014 Grand Prix de l'Age d'Or
  • 2011 Dix Mille Tours
  • 2011 Spa Classic
  • 2010 Le Mans Series Silverstone 1000 km (ILMC)
  • 2010 Le Mans Classic
  • 2006 Le Mans Series Donnington 1000 km
  • 2006 Le Mans Classic
  • 2004 Le Mans Endurance Series Spa 1000 km
  • 2004 Le Mans Classic

Win at 51st GP de l'Age d'Or in 2015 driven by "Mr John of B" (the nom de course of Jean Guittard) and David Ferrer.[28]

Legacy

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The JS3 remained the only open-top barquette endurance racer built by Ligier before purchasing the assets of Equipe Matra and entering Formula 1.

An agreement between Guy Ligier and Jacques Nicolet's Onroak Automotive revived the JS3 name for a new series of Prototype racers to be campaigned at Le Mans by Nicolet's own OAK racing.[29]

References

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  1. ^ a b c d e f "1971 Ligier JS3/". www.supercars.net.
  2. ^ a b c d e f Teissèdre, Jean-Marc (2014). Ligier, Prototypes & GT 1969-1975 et 2014 [Ligier, Prototypes & GT 1969-1975 and 2014] (in French) (1st ed.).
  3. ^ a b c d e f g "Ligier JS3 Cosworth". www.ultimatecarpages.com.
  4. ^ a b c d e "Ligier JS3 Group 6". tech-racingcars.wikidot.com.
  5. ^ a b c d e "Ligier JS3". www.racingsportscars.com.
  6. ^ a b "LIGIER JS3: LA VOITURE DE TRANSITION". www.aonclassiccar.fr.
  7. ^ a b c "Ligier JS3". www.motorsportmagazine.com.
  8. ^ "The #Ligier-JS2 / #Ligier-Maserati-JS2 / #Ligier / #Ligier-Maserati". drive-my.com.
  9. ^ a b c "Rare Ligier sports-racer back after 27 year rest". www.motorsportmagazine.com.
  10. ^ a b c d "Ligier JS3 (1971-1971)". histomobile.com.
  11. ^ "Détail". 24h-en-piste.com.
  12. ^ "1971 Ligier JS3 Specifications". ZerCustoms.
  13. ^ a b "Diaporama : Le Mans Classic 2010". photo-voiture.motorlegend.com.
  14. ^ a b Burr, Norman (1 July 2015). First Principles: The Official Biography of Keith Duckworth OBE. Veloce Publishing. p. 96. ISBN 978-1845845285.
  15. ^ Robson, Graham (14 Dec 2015). Grand Prix Ford - Limited Edition: Ford, Cosworth and the DFV. Veloce Publishing. p. 256. ISBN 978-1845846244.
  16. ^ "Cosworth DFV - Horses for Courses". www.motorsportsmagazine.com.
  17. ^ a b "Ligier JS3 Cosworth". www.ultimatecarpages.com.
  18. ^ a b "Guy Ligier, une vie avant la F1 française (3/3)". www.classiccourses.fr.
  19. ^ a b "Pleins phares sur...la Ligier JS3". www.newsclassicracing.com".
  20. ^ "Complete Archive of Ligier JS3". www.racingsportscars.com.
  21. ^ a b "Modèles à la Une: la Ligier JS3". newdanciennes.com". 3 September 2015.
  22. ^ a b "1971 Ligier JS3-DFV". autovitesse.blogspot.com. 24 March 2016.
  23. ^ "This Time its personal". www.speedhunters.com. 14 June 2012.
  24. ^ a b "Ligier JS3 sports racer". users.telenet.be/peter.morley.
  25. ^ "Cobra's sting in the tale". www.motorsportmagazine.com.
  26. ^ "24 Heures du Mans 2003 Le Mans Legend". chbastin.free.fr.
  27. ^ a b "Ligier JS3 Cosworth". www.ultimatecarpage.com.
  28. ^ "Timing Results". peterautoracing.alkamelsystems.com.
  29. ^ "Guy Ligier, une vie de bagnoles et de coups de gueule". www.lavoixdunord.fr.

See also

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