The ARL V 39, also known as the ARL 1940 V939 40, was a prototype armored fighting vehicle, designed to meet France's demands for a new self-propelled assault gun, prior to

World War II World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposing ...

. Only two complete and functional prototypes were produced, armed with a modified 75mm field gun and 7.5mm machine gun. The design project was known as ARL 40, related to the

char G1 The Char G1 was a French replacement project for the Char D2 medium tank. Several prototypes from different companies were developed from 1936 onwards, but not a single one had been fully completed at the time of the Fall of France in 1940. The ...

B medium tank. Designed in 1935, two prototypes were completed by 1940. However, due to the later occupation of France, mass production to meet orders was canceled and the prototypes evacuated to

Morocco Morocco (),, ) officially the Kingdom of Morocco, is the westernmost country in the Maghreb region of North Africa. It overlooks the Mediterranean Sea to the north and the Atlantic Ocean to the west, and has land borders with Algeria t ...

, ceasing any further development of the project.

Development

Development of the project was started in mid 1935, arising from France's proposal for a new self-propelled, infantry support assault gun. Having no existing tanks of this type in service, two manufacturers submitted designs built upon existing medium tanks:

SOMUA Somua, an acronym for ''Société d'outillage mécanique et d'usinage d'artillerie'', was a French company that manufactured machinery and vehicles. A subsidiary of Schneider-Creusot, Somua was based in Saint-Ouen, a suburb of Paris. Overview ...

, with the

Somua SAu 40 Somua, an acronym for ''Société d'outillage mécanique et d'usinage d'artillerie'', was a French company that manufactured machinery and vehicles. A subsidiary of Schneider-Creusot, Somua was based in Saint-Ouen, a suburb of Paris. Overview ...

based on the chassis of the

SOMUA S35 The SOMUA S35 was a French cavalry tank of the Second World War. Built from 1936 until 1940 to equip the armoured divisions of the Cavalry, it was for its time a relatively agile medium-weight tank, superior in armour and armament to its Frenc ...

medium cavalry tank, and ARL, with the ARL 40, developed using parts from the

Char B1 The Char B1 was a French heavy tank manufactured before World War II. The Char B1 was a specialised break-through vehicle, originally conceived as a self-propelled gun with a 75 mm howitzer in the hull; later a 47 mm gun in a turre ...

heavy tank. The ARL V 39 was the only vehicle fully developed to meet the specification of the ARL 40 project, the first vehicle constructed of a soft steel was completed in June 1938, with military testing taking place 23–25 March 1939. Passing trials successfully, the project was approved for mass production with an initial order of 72 units, of which 24 were to be unarmed command vehicles. On 27 September, the unit distribution was changed to groups of 12 vehicles, divided into two groups consisting of two three-vehicle batteries, with additional command vehicles granted to each group. In October 1939, France's Prime Minister,

Édouard Daladier Édouard Daladier (; 18 June 1884 – 10 October 1970) was a French Radical-Socialist (centre-left) politician, and the Prime Minister of France who signed the Munich Agreement before the outbreak of World War II. Daladier was born in Carpe ...

, placed the revised order, the first five to be ready for service by October 1940, then to be proceeded by a production rate of 10 per month. However, at the beginning of the Battle of France in May 1940, no vehicle was combat ready, two working prototypes were shipped to Morocco to be hidden in a tunnel. The vehicles are confirmed to have reached Africa, but their fate beyond that is unknown. The future occupation of France then saw a cease in any further development in the ARL 40 project. SOMUA's SAu 40 project also passed trials and was simultaneously granted a 36 unit order, 12 of which were to be unarmed command vehicles, which initially were to be allocated to battalions alongside the ARL V 39. However, problems arose with the SAu 40 when adopting the 75mm high-power APX gun used by the ARL V 39, leading to the order of 36 to be canceled on 1 May 1940. Instead the initial role was to be left to the ARL V 39, giving the SAu 40 the new role of tank destroyer using the 47mm mle 1937 artillery gun. Seventy-two SAu 40's were ordered in this configuration, but never reached production.

Armament

The ARL V 39 mounted the 75mm high-velocity

APX In computational complexity theory, the class APX (an abbreviation of "approximable") is the set of NP optimization problems that allow polynomial-time approximation algorithms with approximation ratio bounded by a constant (or constant-factor ap ...

gun. It was a modification of the 75mm 1929 casemate fortress gun. Muzzle velocity reached 400 m/s for high explosive rounds and 570 m/s for armor-piercing rounds. Penetration tests found that the armor-piercing shell had 50 mm of penetration at . Instrumentation included two sight and

stereoscopic rangefinder A stereoscopic rangefinder or stereoscopic telemeter is an optical device that measures distance from the observer to a target, using the observer's capability of binocular vision. It looks similar to a coincidence rangefinder, which uses differen ...

s, allowing for shots at up to distance. Traverse angles were 7° left and right and -10° to 30° vertically. When transporting the gun barrel could be drawn into the body to reduce the total length. The gun had a semi-automatic breech mechanism, automatic charging, and a data recorder.

Development

Armament

References

Further reading