Renault FT Information

The Renault FT (frequently referred to in post-World War I literature as the FT-17, FT17, or similar) was a French light tank that was among the most revolutionary and influential tank designs in history. The FT was the first production tank to have its armament within a fully rotating turret.[note 1] The Renault FTs configuration – crew compartment at the front, engine compartment at the back, and main armament in a revolving turret – became and remains the standard tank layout. Consequently, some historians of armoured warfare have called the Renault FT the worlds first modern tank.

Over 3,000 Renault FT tanks were manufactured by French industry, most of them during 1918. Another 950 of an almost identical licensed copy of the FT (the M1917 light tank) were made in the United States, but not in time to take part in World War I.

The FT was designed and produced by the Société des Automobiles Renault (Renault Automobile Company), one of Frances major manufacturers of motor vehicles then and now.

It is thought possible that Louis Renault began working on the idea as early as 21 December 1915, after a visit from Colonel J. B. E. Estienne. Estienne had drawn up plans for a tracked armoured vehicle based on the Holt caterpillar tractor, and, with permission from General Joffre, approached Renault as a possible manufacturer. Renault declined, saying that his company was operating at full capacity producing war materiel and that he had no experience of tracked vehicles. Estienne took his plans to the Schneider company, where they became Frances first operational tank, the Schneider CA.

At a later, chance meeting with Renault on 16 July 1916, Estienne asked him to reconsider, which he did. The speed with which the project then progressed to the mock-up stage has led to the theory that Renault had been working on the idea for some time.

Louis Renault himself conceived the new tanks overall design and set its basic specifications. He imposed a realistic limit to the FTs projected weight, which could not exceed 7 tons. Louis Renault was unconvinced that a sufficient power-to-weight ratio could be achieved with the production engines available at the time to give sufficient mobility to the heavy tank types requested by the military. Renaults most talented industrial designer, Rodolphe Ernst-Metzmaier, generated the FTs detailed execution plans. Charles-Edmond Serre, a long time associate of Louis Renault, organized and supervised the new tanks mass production. The FTs tracks were kept automatically under tension to prevent derailments, while a rounded tail piece facilitated the crossing of trenches. Because the engine had been designed to function normally under any slant, very steep slopes could be negotiated by the Renault FT without loss of power. Effective internal ventilation was provided by the engines radiator fan, which drew its air through the front crew compartment of the tank and forced it out through the rear engines compartment.

Renaults design was technically far more advanced than the other two French tanks at the time, namely the Schneider CA1 (1916) and the heavy Saint-Chamond (1917). Nevertheless, Renault encountered some early difficulties in getting his proposal fully supported by Estienne. After the first British use of heavy tanks on 15 September 1916 during the Battle of the Somme, the French military still pondered whether a large number of light tanks would be preferable to a smaller number of superheavy tanks (the later Char 2C). On 27 November 1916, Estienne had sent to the French Commander in Chief a personal memorandum proposing the immediate adoption and mass manufacture of a light tank based on the specifications of the Renault prototype. After receiving two large government orders for the FT tank, one in April 1917 and the other in June 1917, Renault was at last able to proceed. His design remained in competition with the superheavy Char 2C until the end of the war.

The prototype was refined during the second half of 1917, but the Renault FT remained plagued by radiator fan belt problems throughout the war. Only 84 were produced in 1917, but 2,697 were delivered to the French army before the Armistice.

About half of all FTs were manufactured in Renaults factory at Boulogne-Billancourt near Paris, with the remainder subcontracted to other companies. Of the original order for 3,530, Renault accounted for 1,850 (52 per cent), Berliet 800 (23 per cent), SOMUA (a subsidiary of Schneider and Cie) 600 (17 per cent), and Delaunay-Belleville 280 (8 per cent). When the order was increased to 7,820 in 1918, production was distributed in roughly the same proportion. Louis Renault agreed to waive royalties for all French manufacturers of the FT.

When the US entered the war in April 1917, its army was short of heavy matériel, and had no tanks at all. Because of the wartime demands on French industry, it was decided that the quickest way to supply the American forces with sufficient armour was to manufacture the FT in the US. A requirement of 4,400 of a modified version, the M1917, was decided on, with delivery expected to begin in April, 1918. By June 1918, US manufacturers had failed to produce any, and delivery dates were put back until September. France therefore agreed to lend 144 FTs, enough to equip two battalions. No M1917s reached the American Expeditionary Forces (AEF) until the war was over.

The first turret designed for the FT was a circular, cast steel version almost identical to that of the prototype. It was designed to carry a Hotchkiss 8mm machine gun. In April 1917 Estienne decided for tactical reasons that some vehicles should be capable of carrying a small cannon. The 37mm Puteaux gun was chosen, and attempts were made to produce a cast steel turret capable of accommodating it, but they were unsuccessful. The first 150 FTs were for training only, and made of non-hardened steel plus the first model of turret. Meanwhile, the Berliet Company had produced a new design, a polygonal turret of riveted plate, which was simpler to produce than the early cast steel turret. It was given the name "omnibus", since it could easily be adapted to mount either the Hotchkiss machine gun or the Puteaux 37mm with its telescopic sight. This turret was fitted to production models in large numbers. In 1918 Forges et aciéries Paul Girod produced a successful circular turret which was mostly cast with some rolled parts. The Girod turret was also an "omnibus" design. Girod supplied it to all the companies producing the FT, and in the later stages of the war it became more commonplace than the Berliet turret. The turret sat on a circular ball-bearing race, and could easily be rotated by the gunner/commander or be locked in position with a handbrake.

The Renault FT was widely used by French forces in 1918 and by the American Expeditionary Forces (AEF) on the Western Front in the later stages of World War I.

Its battlefield debut occurred on 31 May 1918, east of the Forest of Retz, east of Chaudun, between Ploisy and Chazelles, during the Third Battle of the Aisne. This engagement, with 30 tanks, successfully broke up a German advance, but in the absence of infantry support, the vehicles later withdrew. From then on, gradually increasing numbers of FTs were deployed, together with smaller numbers of the older Schneider CA1 and Saint-Chamond tanks. As the war had become a war of movement during mid-1918, during the Hundred Days Offensive, the lighter FTs were often transported on heavy trucks and special trailers rather than by rail on flat cars. Estienne had initially proposed to overwhelm the enemy defences using a "swarm" of light tanks, a tactic that was eventually successfully implemented. Beginning in late 1917, the Entente allies were attempting to outproduce the Central Powers in all respects, including artillery, tanks, and chemical weapons. Consequently, a goal was set of manufacturing 12,260 FT tanks (7,820 in France and 4,440 in the United States) before the end of 1919.The Renault FT tank was the best designed battle tank of the entire war, efficient, economical, and adapted to mass industrial production. It played a leading role in the offensives of 1918, when it received the popular name of "Victory Tank".

The British Army used 24 FTs for command and liaison duties, usually with the gun removed.

Italy received 3 FTs in June 1918, but they did not see action and no other tanks were received until the end of the war.

After the end of World War I, Renault FTs were exported to many countries (Belgium, Brazil, Czechoslovakia, Estonia, Finland, Iran, Japan, Lithuania, the Netherlands, Poland, Romania, Spain, Switzerland, Turkey, and Yugoslavia). Renault FT tanks were used by most nations having armoured forces, generally as their prominent tank type.

They were used in anti-Soviet conflicts such as the Russian Civil War, Polish-Soviet War and Estonian War of Independence. On 5 February 1920 Estonia purchased nine vehicles from France.[verification needed]

French tanks deployed in Vladivostok were given to the Chinese Fengtian Army of Zhang Zuolin in 1919. 14 more Renaults were bought in 1924 and 1925. These tanks saw action to protect the border from the Soviets in the 1920s and against the warlord Wu Peifu in 1926. After the Japanese invasion of Manchuria, nearly all were handed over to the Manchukuo Imperial Army.

Renault tanks were also used in colonial conflicts, for instance crushing a revolt in Italian Libya in 1919. The French Army sent a company of FT tanks in Syria during the Great Druze Revolt. In Brazil, the FT tanks were used by the Old Republic to crush various revolts between 1924 and 1927 and by Vargas forces against the Constitutionalist Revolution.

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