Panhard Information

Panhard was a French motor vehicle manufacturer that began as one of the first makers of automobiles. It was last a manufacturer of light tactical and military vehicles. Its final incarnation, now owned by Renault Trucks Defense, was formed by the acquisition of Panhard by Auverland in 2005, and then by Renault in 2012. In 2018 Renault Trucks Defense, Acmat and Panhard combined under a single brand called Arquus.

Panhard was originally called Panhard et Levassor, and was established as an automobile manufacturing concern by René Panhard and Émile Levassor in 1887.

Panhard et Levassor sold their first automobile in 1890, based on a Daimler engine license. Levassor obtained his licence from Paris lawyer Edouard Sarazin, a friend and representative of Gottlieb Daimlers interests in France. Following Sarazins 1887 death, Daimler commissioned Sarazins widow Louise to carry on her late husbands agency. The Panhard et Levassor license was finalised by Louise, who married Levassor in 1890. Daimler and Levassor became friends, and shared improvements with one another.

These first vehicles set many modern standards, but each was a one-off design. They used a clutch pedal to operate a chain-driven gearbox. The vehicle also featured a front-mounted radiator. An 1895 Panhard et Levassor is credited with the first modern transmission. For the 1894 Paris–Rouen Rally, Alfred Vacheron equipped his 4 horsepower (3.0 kW; 4.1 PS) with a steering wheel, believed to be one of the earliest employments of the principle.

In 1891, the company built its first all-Levassor design, a "state of the art" model: the Système Panhard consisted of four wheels, a front-mounted engine with rear wheel drive, and a crude sliding-gear transmission, sold at 3500 francs. (It would remain the standard until Cadillac introduced synchromesh in 1928.) This was to become the standard layout for automobiles for most of the next century. The same year, Panhard et Levassor shared their Daimler engine license with bicycle maker Armand Peugeot, who formed his own car company.

In 1895, 1,205 cc (74 cu in) Panhard et Levassor vehicles finished first and second in the Paris–Bordeaux–Paris race, one piloted solo by Levassor, for 48¾hr. However, during the 1896 Paris–Marseille–Paris race, Levassor was fatally injured due to a crash while trying to avoid hitting a dog, and died in Paris the following year. Arthur Krebs succeeded Levassor as General Manager in 1897, and held the job until 1916. He turned the Panhard et Levassor Company into one of the largest and most profitable manufacturers of automobiles before World War I.

Panhards won numerous races from 1895 to 1903. Panhard et Levassor developed the Panhard rod, which came to be used in many other types of automobiles as well.

From 1910 Panhard worked to develop engines without conventional valves, using under license the sleeve valve technology that had been patented by the American Charles Yale Knight. Between 1910 and 1924 the Panhard and Levassor catalogue listed plenty of models with conventional valve engines, but these were offered alongside cars powered by sleeve valve power units. Following various detailed improvements to the sleeve valve technology by Panhards own engineering department, from 1924 till 1940 all Panhard cars used sleeve valve engines.

Under the presidency of Raymond Poincaré, which ran from 1913 till 1920, Panhard and Levassors 18CV and 20CV models were the official presidential cars.

During the war Panhard, like other leading automobile producers, concentrated on war production, including large numbers of military trucks, V12-cylinder aero-engines, gun components, and large 75 and 105 diameter shells.

The military were also keen on the sleeve valve engined Panhard 20HP.General Joffre himself used two 35HP Panhard Type X35s with massive 4-cylinder 7,360 cc (449 cu in) engines for his personal transport, and these were frequently to be seen by Parisians carrying military leaders between the front-line and the Élysée Palace.

Following the return to peace in 1918, Panhard resumed passenger car production in March 1919 with the 10HP Panhard Type X19, which used a 4-cylinder 2,140 cc (131 cu in) engine. This was followed three months later by three more 4-cylinder models which will have been familiar to any customers whose memories pre-dated the war, but they now incorporated ungraded electrics and a number of other modifications. For the 15th Paris Motor Show, in October 1919, Panhard were displaying four models, all with four cylinder engines, as follows:

By 1925, all Panhards cars were powered by Knight sleeve valve engines that used steel sleeves. The steel sleeves were thinner and lighter than the cast iron ones that had been fitted in Panhard sleeve valve engines since 1910, and this already gave rise to an improved friction coefficient permitting engines to run at higher speeds. To reduce further the risk of engines jamming, the outer sleeves, which are less thermally stressed than the inner sleeves, were coated on their inner sides with an anti-friction material, employing a patented technique with which Panhard engineers had been working since 1923. This was one of several improvements applied by Panhard engineers to the basic Knight sleeve-valve engine concept.

In 1925 a 4,800 cc (290 cu in) model set the world record for the fastest hour run, an average of 185.51 km/h (115.26 mph).

A surprise appeared on the Panhard stand at the 20th Paris Motor Show in October 1926, in the shape of the manufacturers first six-cylinder model since before the war. The new Panhard 16CV "Six" came with a 3445cc engine and sat on a 3,540 mm (139.4 in) wheelbase. At the show it was priced, in bare chassis form, at 58,000 francs. Of the nine models displayed for the 1927 model year, seven featured four-cylinder engines, ranging in capacity from 1480cc (10CV) to 4845cc (20CV), and in price from 31,000 francs to 75,000 francs (all in bare chassis form). Also on show was an example of the 8-cylinder 6350cc (35CV) "Huit" model which Panhard had offered since 1921 and which at the 1926 show was priced by the manufacturer in bare chassis form at 99,000 francs.

When Panhard presented their 1931 line-up at the Paris Motor Show in October 1930, their last two four-cylinder models had been withdrawn, along with the 10CV six-cylider Type X59. Instead they concentrated on their "S-series" cars, designated "Panhard CS" and "Panhard DS" according to engine size, and introduced a year earlier. Publicity of the time indicated the "S" stood for "Voitures surbaissées" (cars having an "underslung" chassis,) but, clearly captivated by the power of alliteration, added that "S" also indicated cars that were "...souples, supérieures, stables, spacieuses, silencieuses, sans soupapes (ie using valveless cylinders)...". Four of the five Panhards exhibited featured increasingly lavish and pricey 6-cylinder engined cars, their engine sizes ranging from 2.35-litres to 3.5-litres. There was also an 8-cylinder 5.1 l (310 cu in) Panhard Type X67 on display, with a generous 3,590 mm (141.3 in) wheelbase and listed, even in bare chassis form, at 85,000 francs.

Panhard et Levassors last pre-war car was the unusually styled monocoque Dynamic series, first introduced in 1936.

Panhard et Levassor also produced railbuses, including some for the metre gauge Chemin de Fer du Finistère.

After World War II the company was renamed Panhard (without "Levassor"), and produced light cars such as the Dyna X, Dyna Z, PL 17, 24 CT and 24 BT. The company had long noted the weight advantages of aluminum, and this as well as postwar government steel rationing (designed to limit new car models to ensure an orderly return to production at the major firms), encouraged the firm to proceed with the expensive alternative of making the bodies and several other components out of aluminum. Thus the Dyna X and early Dyna Z series 1 had aluminum bodies. Unfortunately, cost calculations by Jean Panhard, the inheriting son and managing director of the firm, failed to account for the extra cost of aluminum vs steel. His calculations were made for the sheet metal panel area actually utilized per body shell, and did not account for the scrap of each of the stampings making up the shell. Once in production, a re-examination showed a cost of 55,700fr for aluminum shells and only 15,600fr for steel. The use of aluminum had pushed the firm close to bankruptcy, and a hurried engineering job returned the firm to steel. Thus, the later Dyna Z (from mid September 1955) and the successor PL 17 bodies were steel, and the major stampings retained the heavier gauge intended for durability with aluminum, so as to avoid complete replacement of the stamping dies.

The air-cooled flat-twin engine of the Dyna was used by Georges Irat for his "Voiture du Bled" (VdB) off-road vehicle, built in Morocco in small numbers in the early 1950s.

Complete article available at this page.