Citroën Traction Avant

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Citroën Traction Avant
Manufacturer	Citroën
Production	1934-1957
Predecessor	Citroën Type C
Successor	Citroën DS
Body style(s)	2-door coupé 4-door sedan
Engine(s)	1.3 L I4 1.9 L I4 2.9 L I6
Designer	André Lefèbvre

Traction Avant rear

Traction Avant rears. The principal visual change during the production run occurred in 1952 and involved the boot/trunk.

The Citroën Traction Avant was an automobile produced by the French manufacturer Citroën. About 760,000 units were manufactured from 1934 to 1957.

[edit] Impact on the world

The Traction Avant, designed by André Lefèbvre and Flaminio Bertoni in late 1933 / early 1934, was one of the most successful cars with front wheel drive in the 1930s. "Traction Avant" is French for front wheel drive, literally meaning "frontal traction". The Traction Avant was not the first production front wheel drive car, others included Cord in the United States who released the front wheel drive L29 from 1929 to 1932 and Alvis in the UK with their 1928 FWD.

The car used an arc-welded monocoque frame, where most of the other cars of the era were based on a frame (chassis) onto which the body ("coachwork") was built. Monocoque construction (also called Unit Body or "Unibody" today) results in a lighter vehicle, and is now used for virtually all car construction, although body-on-frame construction is still suitable for larger vehicles such as trucks.

This method of construction was viewed with great suspicion in many quarters, with doubts about its strength. A type of crash test was developed, taking the form of driving the car off a cliff, to illustrate its great inherent resilience.

The novel design made the car seem very low-slung relative to its contemporaries — the Traction Avant always possessed a unique look, which went from appearing rakish in 1934 to familiar and somewhat old fashioned by 1955.

The suspension was very advanced for the car's era. The front wheels were independently sprung, using a torsion bar and wishbone suspension arrangement, where most contemporaries used live axle and cart-type leaf spring designs. The rear suspension was a simple steel beam axle and Panhard rod with unequal trailing arms, to allow the two torsion bars to run parallel to each other, across the car's width.

Since it was considerably lighter than "conventional" designs of the era, it was capable of 100 km/h (62 mph), and used only 10 litres of gasoline per 100 km (24 mpg).

[edit] Variants

The original models were a small saloon with a 1303 cc engine. This model was called the 7A, which was succeeded in June 1934 by the 7B and 7C with higher powered engines of 1529 and 1628 cc respectively. Later models were the 11, which had a four-cylinder 1911 cc engine, and the 15, which had a 2867 cc six-cylinder engine. The numbers refer to the French fiscal horsepower rating CV (thus the 11 was an 11CV, the 15 was 15 CV). The 11 was built in two versions, the 11L ("légère", or "light"), which was the same size as the 7CV, and the normal model 11, which had a longer wheelbase.

Citroën planned two variants that never entered production, since there was not enough funding available to develop them, except as running prototype vehicles. One was an automatic transmission-equipped model and the other was a 22CV model with a large V8 engine. The car was supposed to have a less spartan interior than the other Traction Avant's and it was to feature Citroën's own new V8 engine. About twenty prototypes were made, but when the project was canceled in 1935 due to Michelin's takeover, they were probably all destroyed.

The Commerciale hatchback Traction Avant

A French "familiale" big fifteen 11 F 1954, 6 windows

In addition to the 4-door body, the car was also produced as a 2-door coupé with a rumble seat, as a convertible and as an extended length model with three rows of seats. There was even a hatchback-type Commerciale variant, in 1939, well ahead of its time, in which the tailgate was in two halves, the lower of which carried the spare wheel with the upper opening up to roof level. A one-piece top-hinged tailgate was introduced when the Commerciale resumed production in 1954 after being suspended during World War II.

[edit] UK built cars

Left-hand drive versions were built in Paris, France and Forest, Belgium, and right-hand drive cars were built in Slough, United Kingdom. The Slough version of the 11L was called the Light Fifteen and the long wheelbase 11 was called the Big Fifteen. This confusing terminology referred to the British fiscal tax rating of the time, which was higher than the French, so the 11CV engine was 15HP in England. The 15CV model was called "Big Six" in reference to its 6 cylinder engine. They were equipped with the leather seats and wooden dashboards popular in the UK, had a 12-volt electrical system and were distinguished by a different radiator grille and different bumpers (fenders). Some models also had a sliding sunroof.

A 1911 cc Light Fifteen tested by the British magazine The Motor in 1951 had a top speed of 72.6 mph (116.8 km/h) and could accelerate from 0-60 mph (97 km/h) in 29.7 seconds. A fuel consumption of 25.2 miles per imperial gallon (11.2 L/100 km/21.0 mpg US) was recorded. The test car cost £812 including taxes. ^[1]

A 2,866 cc Six cylinder model was tested by the same magazine in 1954 and for this car the top speed found was 81.1 mph (130.5 km/h), acceleration from 0-60 mph (97 km/h) 21.2 seconds and fuel consumption 18.6 miles per imperial gallon (15.2 L/100 km/15.5 mpg US). The test car cost £1349 including taxes. ^[2]

[edit] Engineering

The Traction Avant used a longitudinal, front wheel drive layout, with the engine set well within the wheelbase, resulting in a very favourable weight distribution, aiding the car's advanced handling characteristics. The gearbox was placed at the front of the vehicle with the engine behind it and the differential between them, a layout shared with the later Renault 4 and first generation Renault 5 but the opposite way round to many longitudinal front-drive cars, such as the Saab 96 and Renault 18 range and most Audi models. The gear change was set in the dashboard, with the lever protruding through a vertical, H-shaped gate. Because this vertical orientation could have resulted in the car dropping out of gear when the lever was in the upper positions (i.e. second or reverse gears), the gear shift mechanism was locked when the mechanical clutch was engaged and released when the clutch pedal was depressed. The result of this layout, along with pendant pedals, umbrella-type handbrake control and front bench seats, was a very spacious interior, with a flat and unobstructed floor. The low-slung arrangement also eliminated the need for running boards to step into or out of the vehicle. These features made them ideal for use as limousines and taxi cabs, and they were quite popular among drivers and passengers alike.

[edit] Impact on Citroën

1954 six cylinder 15CV with hydropneumatic suspension fitted to the rear wheels - in 'high' position

The development costs of the Traction Avant were very high and Citroën declared bankruptcy in 1934. The largest creditor was Michelin, who then owned Citroën from 1934 until 1976. Under Michelin, Citroën was run as a research laboratory, a test bed for their radial tires and new automotive technologies.

In 1954 Citroën's experiments with hydropneumatic technology produced its first result, the "15H"—a variant of the 6-cylinder model 15 with a self-leveling, height-adjustable rear suspension, a field trial for the revolutionary DS released the following year.

Directly after the introduction of the Citroën ID, a simplified and more competitively priced version of the still revolutionary DS, production of the Traction Avant ended in July 1957. Over 23 years, 759,111 had been built, including 26,400 assembled in Slough in England, 31,750 assembled in Forest near Brussels and 1,823 assembled at Cologne in Germany. The total reflects the production stoppage during World War II.

[edit] The Traction Avant today

As of 2006, the oldest surviving 7A has production number ("coque nr") AZ 00-18, and is displayed in partly dismantled shape (engine and front wheels detached) in the Citroën Museum in Paris. The oldest running 7A is probably number AZ-00-23, which was, until 1 September 2006, in possession of a Dutch owner and is now with a Slovenian owner.

Traction Avant as modern wedding car

Traction Avants are fairly robust vehicles. Every few years, Traction Avant enthusiasts ship their vehicles to an exotic location for a rally. In 2002, for example, a group of over 30 Tractions drove from Los Angeles to New York without incident.^{[citation needed]}

[edit] Traction Avant in film

15 Six sedan

The Traction Avant is generally associated in movie iconography with the Second World War: the typical cliché is that of Gestapo agents, clad in black, driving around in black Traction Avants. There is some validity to this image, as German occupation forces did indeed admire the car for its handling qualities and speed. The car was also favoured by the French Resistance, and gave its name to an organised-crime gang of the time. The police and criminals in post war France (who may have been on either side in the war), also preferred the car for its road-ability.

• L'Armée des ombres - Army of Shadows. A brutal and grittily realistic depiction of the secret war against the German occupation of France. British Special Operations Executive is omitted. The French news magazine L'Express has repeatedly called L'Armée des ombres "perhaps the best French film ever made on the French Resistance." The last ride - in a Traction, of a resistance traitor to a 'safe house' is very memorable.
• Carve Her Name with Pride about the about British Special Operations Executive agent Violette Szabo G.C.'s actions with the French Resistance in occupied France and execution in a German concentration camp in 1945.
• The film The Great Escape featured a Traction Avant driven by members of the French Resistance where three Nazi officers were killed in a drive-by shooting (this particular scene occurs just after James Coburn receives a phone call at an outdoor cafe).
• In The Sound of Music, the final escape from the Nazis is by Traction Avant.
• James Bond is followed by a Traction Avant driven by a Bulgarian agent in From Russia with Love.
• Cary Grant and Grace Kelly are pursued by a Traction Avant through the mountains of Cote d'Azur in To Catch a Thief.
• A white Traction Avant appears in the 1981 film Diva, set in and around Paris. The car is used as part of an exchange between a corrupt police official and the enigmatic con-man Gorodish; the car is destroyed when a bomb kills two Taiwanese pirates, but Gorodish has an identical white Traction Avant allowing him to drive a car that matches his white suit. The Traction Avant is lavishly photographed in the film, and Gorodish notes that the Traction Avant was preferred by both criminals and police, making it an appropriate choice for the official.
• In Indiana Jones and the Last Crusade, Jones and his father try to escape from German aircraft in a "borrowed" convertible Traction Avant 11L. The scene is notable because the filmmakers had the Traction Avant's rear wheels spin out while taking off, even though it is a front wheel drive car. Two cars were built for the film. Neither were genuine roadsters but rather fibreglass replica roadster bodies fitted to saloon floorpans.
• In the Tintin book "The Calculus Affair," Tintin and Captain Haddock are forced off the road twice by a black Traction Avant.

[edit] References

[edit] External links

• Citroen Traction Avant at Citroenet
• Traction Avant links Citroën World
• Traction Avant rentals in France
• CITROËN TRACTION AVANT
• Traction Avant district CitCity
• CITROENZ: Traction Avant modelcars
• Citroën Crash Test: Traction Avant 1934

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Citroën Traction Avant