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Jean-Albert Grégoire Jean-Albert Grégoire Jean-Albert Grégoire Jean-Albert Grégoire Jean-Albert Grégoire Jean Albert Grégoire Jean Albert Grégoire Jean-Albert Grégoire
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Jean Albert Grégoire,​ a veces escrito incorrectamente Jean-Albert Grégoire, (7 de julio de 1899 - 19 de agosto de 1992)​ fue un ingeniero y empresario automovilístico francés, uno de los grandes pioneros de la "tracción delantera" en el mundo. También abogó por el uso de aleaciones de aluminio en la técnica del automóvil. Jean-Albert Grégoire (ur. 7 lipca 1899 roku, zm. 19 sierpnia 1992 roku) – francuski pisarz, inżynier i kierowca wyścigowy. Jean-Albert Grégoire (* 7. Juli 1899 in Paris; † 19. August 1992 in Neuilly-sur-Seine) war ein französischer Ingenieur, Erfinder und Automobilpionier. Jean-Albert Grégoire (Parigi, 7 luglio 1899 – Parigi, 19 agosto 1992) è stato un imprenditore francese. Jean-Albert Grégoire (7 July 1899 in Paris – 19 August 1992) was one of the great pioneers of the front-wheel-drive car. He contributed to the development of front-wheel-drive vehicles in two ways. The first way was in developing and promoting the Tracta joint (designed by his friend Pierre Fenaille), which was, until manufacturing techniques had progressed sufficiently to allow the successful manufacture of the constant velocity joints commonly in use today, the preferred choice of most manufactures of vehicles that had driven front wheels. Tracta joints were used by many of the pioneers of front-wheel drive, including DKW between 1929 and 1936 and Adler from 1932 to 1939 as well as the cars designed by J A Grégoire that will be mentioned later. The Tracta joint was fitted to most of the Jean-Albert Grégoire (Paris, 1899ko uztailaren 7a - Neuilly-sur-Seine, 1992ko abuztuaren 19a) frantses automobilgintzaren sustatzailea eta idazlea izan zen. Hainbat automobil eta eredu asmatu eta egin zituen (Tracta, Amilcar Compound), eta etengabe jardun zuen ibilgailu hobeak egiteko ikerkuntza-lanetan: automobil elektrikoa, turbinadun autoa. Automobilgintzaren historiaz hainbat liburu plazaratu zituen, adibidez L´aventure automobile (Automobilaren abentura), Les Vingt Quatre Heures de Le Mans (Le Manseko 24 Orduak), Cinquante ans d´automobile (Automobilaren 50 urte), eta baita eleberriak ere: L´ombre de l´argent (Diruaren itzala), Les fanatiques (Fanatikoak). Jean Albert Grégoire, né le 7 juillet 1899 à Paris 17e et mort le 19 août 1992 à Neuilly-sur-Seine, est un ingénieur et entrepreneur français qui fut l'un des grands pionniers de la « traction avant » dans le monde et notamment le premier en France. Il prôna également l'utilisation des alliages d'aluminium dans la technique automobile. Il a ainsi participé à de nombreux projets dans le domaine de l'automobile au milieu du XXe siècle. Jean-Albert Grégoire, född 7 juli 1899 i Paris, död 19 augusti 1992 i Neuilly-sur-Seine , var en fransk konstruktör och entreprenör inom bilindustrin. Grégoire var pionjär inom framhjulsdrift för bilar. Tillsammans med kollegan Pierre Fenaille utvecklade han Tracta-knuten, en drivknut som användes på tidiga framhjulsdrivna bilar som DKW och Adler Trumpf. Mellan 1927 och 1934 konstruerade Grégoire framhjulsdrivna sportbilar av märket Tracta. Han tävlade även med dem och tog Grégoire en klasseger och sjundeplacering totalt i Le Mans 24-timmars med en enliters Tracta.
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Jean-Albert Grégoire (* 7. Juli 1899 in Paris; † 19. August 1992 in Neuilly-sur-Seine) war ein französischer Ingenieur, Erfinder und Automobilpionier. Jean Albert Grégoire, né le 7 juillet 1899 à Paris 17e et mort le 19 août 1992 à Neuilly-sur-Seine, est un ingénieur et entrepreneur français qui fut l'un des grands pionniers de la « traction avant » dans le monde et notamment le premier en France. Il prôna également l'utilisation des alliages d'aluminium dans la technique automobile. Il a ainsi participé à de nombreux projets dans le domaine de l'automobile au milieu du XXe siècle. Jean Albert Grégoire,​ a veces escrito incorrectamente Jean-Albert Grégoire, (7 de julio de 1899 - 19 de agosto de 1992)​ fue un ingeniero y empresario automovilístico francés, uno de los grandes pioneros de la "tracción delantera" en el mundo. También abogó por el uso de aleaciones de aluminio en la técnica del automóvil. Jean-Albert Grégoire (ur. 7 lipca 1899 roku, zm. 19 sierpnia 1992 roku) – francuski pisarz, inżynier i kierowca wyścigowy. Jean-Albert Grégoire (Parigi, 7 luglio 1899 – Parigi, 19 agosto 1992) è stato un imprenditore francese. Jean-Albert Grégoire (Paris, 1899ko uztailaren 7a - Neuilly-sur-Seine, 1992ko abuztuaren 19a) frantses automobilgintzaren sustatzailea eta idazlea izan zen. Hainbat automobil eta eredu asmatu eta egin zituen (Tracta, Amilcar Compound), eta etengabe jardun zuen ibilgailu hobeak egiteko ikerkuntza-lanetan: automobil elektrikoa, turbinadun autoa. Automobilgintzaren historiaz hainbat liburu plazaratu zituen, adibidez L´aventure automobile (Automobilaren abentura), Les Vingt Quatre Heures de Le Mans (Le Manseko 24 Orduak), Cinquante ans d´automobile (Automobilaren 50 urte), eta baita eleberriak ere: L´ombre de l´argent (Diruaren itzala), Les fanatiques (Fanatikoak). Jean-Albert Grégoire (7 July 1899 in Paris – 19 August 1992) was one of the great pioneers of the front-wheel-drive car. He contributed to the development of front-wheel-drive vehicles in two ways. The first way was in developing and promoting the Tracta joint (designed by his friend Pierre Fenaille), which was, until manufacturing techniques had progressed sufficiently to allow the successful manufacture of the constant velocity joints commonly in use today, the preferred choice of most manufactures of vehicles that had driven front wheels. Tracta joints were used by many of the pioneers of front-wheel drive, including DKW between 1929 and 1936 and Adler from 1932 to 1939 as well as the cars designed by J A Grégoire that will be mentioned later. The Tracta joint was fitted to most of the military vehicles that had driven front wheels used by most of the combatants in the Second World War. They included Laffly and Panhard in France, Alvis and Daimler in the UK and Willys in the United States that used the joint in a quarter of a million Jeeps and many others. This was to continue after the war, the first Land Rover being so fitted. The second way he contributed to the development of front-wheel-drive vehicles was in designing and in some cases manufacturing front-wheel-drive cars. The Tracta Gephi was his first design and it was this car that inspired him to design a constant velocity joint. All subsequent Tracta cars, and there were about two hundred manufactured between 1927 and 1932, used it. The first of these was raced at Le Mans in 1927 completing the 24-hour race. The Tracta cars used engines from S.C.A.P. from 1100 cc to 1600 cc, and Continental and Hotchkiss, from 2700 cc to 3300 cc. J.A. Grégoire designed an 11cv 6-cylinder car for Donnet in 1932. Only four prototypes were produced, one being shown at the Paris Salon of 1932 before Donnet went into liquidation. He then worked with to design two cars for Chenard et Walcker. They were of advanced design but were not a commercial success. In 1937 he designed the Amilcar Compound, produced by Hotchkiss from 1938 to the Second World War, by which time 681 examples had been made. It was constructed using another of Grégoire's ideas, a cast (light alloy) chassis frame. Other advanced features were rack and pinion steering and all independent suspension. But the car had its bad points, cable brakes and gear-change linkage and a side-valve engine although the latter was still common at this time. An overhead valve version came later. During the Second World War he secretly worked with his design team at his works at Asnières-sur-Seine on a small car the Aluminium "Francais-Grégoire". It had a chassis-body frame of light alloy, front-wheel drive, an air-cooled flat twin engine and independent suspension on all wheels. A four-seat car weighing only 880 pounds (400 kg) and could reach 60 mph (97 km/h) while returning 70 mpg. This design was to form the basis of the 1950 "Dyna" Panhard. In 1950 another Hotchkiss car the Hotchkiss Grégoire, was produced again with an alloy chassis and body. With independent suspension on all four wheels and fitted with a water-cooled flat four engine of 2 litres, ahead of the front axle, it was fast, with a top speed of 94 mph (151 km/h), but the car was expensive and only 250 examples were made by 1954. In 1956 Grégoire produced a two-seat convertible with a 2.2-litre supercharged flat-four engine producing 130 PS (96 kW; 128 hp) and, as in the case of the cars mentioned previously, front-wheel drive. All ten cars made were fitted with bodies designed and built by Henri Chapron. All the cars mentioned previously were front-wheel-drive cars. Grégoire also designed a couple of rear-wheel-drive machines: the first electric car with the machinery in the mid-engine position and a gas turbine car, the experimental SOCEMA-Grégoire with a front-engined, rear-wheel drive layout. Jean-Albert Grégoire, född 7 juli 1899 i Paris, död 19 augusti 1992 i Neuilly-sur-Seine , var en fransk konstruktör och entreprenör inom bilindustrin. Grégoire var pionjär inom framhjulsdrift för bilar. Tillsammans med kollegan Pierre Fenaille utvecklade han Tracta-knuten, en drivknut som användes på tidiga framhjulsdrivna bilar som DKW och Adler Trumpf. Mellan 1927 och 1934 konstruerade Grégoire framhjulsdrivna sportbilar av märket Tracta. Han tävlade även med dem och tog Grégoire en klasseger och sjundeplacering totalt i Le Mans 24-timmars med en enliters Tracta. Efter Tracta-tiden konstruerade Grégoire bilar för Donnet och Chenard & Walcker. För Amilcar tog han fram en liten lätt, framhjulsdriven modell kallad Amilcar Compound. Bilen var uppbyggd runt en gjuten hjälpram i aluminiumlegeringen Alpax. Ramen bestod av torpedvägg, vindruteram och två ramben som bar upp drivlinan och framvagnen. Under andra världskriget tog Grégoire fram en mindre modell på Compound-temat med tvåcylindrig boxermotor. Efter kriget tillverkades den av Panhard som Panhard Dyna X. Grégoire tog även fram en större variant med fyrcylindrig boxermotor som tillverkades av Hotchkiss. Denna Hotchkiss-Grégoire blev en försäljningsmässig katastrof och Hotchkiss blev stående med ett lager halvfärdiga bilar. Grégoire lät Henri Chapron bygga cabrioletkarosser till tio av dessa. De såldes som Grégoire Sport med kompressormatad motor. I början av 1950-talet arbetade Grégoire med gasturbindrift för bilar. Han byggde en prototyp med motor från Socéma. Till skillnad från de flesta andra av Grégoires konstruktioner var den bakhjulsdriven.
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