Jean-Albert Gregoire (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
[1]
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 Gregoire 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
USA 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. Gregoire 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
Lucian Chenard 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
Gregoire's ideas, a cast Alpax (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-Gregoire". 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 weighting
only 880 pounds (400 kg) and could reach 60 mph (97 km/h) while
returning 70 mpg
[vague]. This design was to form the basis of the 1950 "
Dyna"
Panhard.
In 1950 another Hotchkiss car the "Hotchkiss-Gregoire", 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 Gregoire produced a two-seat convertible with a
2.2-litre supercharged flat-four engine producing 130 bhp (97 kW;
132 PS) and, as in the case of the cars mentioned previously,
front-wheel drive. All of ten cars made were fitted with bodies designed
and built by
Henri Chapron.
All the cars mentioned previously were front-wheel-drive cars.
Gregoire also designed a couple of rear-wheel-drive machines, the first
an electric car with the machinery in the mid-engine position and a
gas turbine car the experimental Socema-Gregoire with a front-power-unit and rear-drive layout.
From Wikipedia, the free encyclopedia
http://en.wikipedia.org/wiki/Jean-Albert_Gr%C3%A9goire
Alteration: Gregoire is used without the accent aigu.