The appearance in 1934 of the Traction
Avant
marked a major step in the evolution of the motor car,
notwithstanding
that many elements of the design had appeared in other
cars built by
other manufacturers. What the Traction did was to
combine them into a
completely new concept - chassisless construction, front
wheel drive,
hydraulic brakes and torsion bar suspension.
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In 1931, Budd showed André Citroën a front wheel drive
concept car, designed by Joseph Ledwinka. Budd, in
common with other
manufacturers of the era, built concept cars to
demonstrate the latest
body fabrication techniques. Citroën had used Budd
technology under
licence ever since the introduction of the 10HP
Tout Acier.
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If André Citroën was responsible for the concept, it
was
André Lefebvre who was responsible for making André
Citroën's dream a
reality. And without Maurice Sainturat who was
responsible for the
engine design, the Traction could all too easily have
resulted in a
complete fiasco.
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The suspension was designed by Pierre Lemaire and Paul
d'Abarède while the bodywork was down to Lefebvre, Raoul
Cuinet and
Flaminio Bertoni, the latter being responsible for
making scale models.
Jean Daninos was responsible for the evolution of the
general style of
the car.
André Citroën's brief was:
-
front wheel drive
-
7 CV (French fiscal rating)
-
7 litres/100 km fuel consumption
-
100 kph top speed
-
four seats
-
800 kg weight
-
steel chassisless 'monocoque' body
-
clutchless torque convertor transmission
-
15 000 F price
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And astonishingly, the Traction was developed in the
space of eighteen months!
And then, when the car was launched, André Citroën tore
down the old factory and constructed a new one to build
the car.
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As it was, the Traction's birth was followed shortly
thereafter by André Citroën losing his company to
Michelin and then
dying before the Traction achieved real success.
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The prototype above is very close to the production version
The
first plans were drawn up in February 1933 and finalised in June
1933
and the first two prototypes were presented to André Citroën in
August
1933.
As menioned above, André Citroën in his desire for
the Traction to be truly revolutionary in all areas, wanted to
fit the
car with a clutchless transmission and he turned to the
Brazilian
inventor Sensaud de Lavaud who had developed just such a sytem.
Five
protoypes were equipped with the system but it proved unreliable
and
was dropped and the decision was taken to fit a conventional 3
speed
gearbox with foot-operated clutch. This required a redesign of
the
monocoque.
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