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18-pdr Ordnance QF Le 18-pounder fut introduit en 1904 avec le 13-pounder (moins puissant mais fort similaire). Ce canon fut utilisé sur tous les fronts durant la première guerre mondiale par la Royal Field Artillery. Ce canon mettait à feu des obus explosifs (HE), chimiques (GAS) et des Shrapnels. Il fut le canon de campagne standard de la Royal Army et les armées du Commonwealth durant la "Grande Guerre" et fut produit en très grand nombre en trois variantes principales. La traction de ce canon était assurée par des chevaux, le mécanisation n'interviendra que dans les années trente. The 18-pounder was introduced in 1904 with the 13-pounder (less powerful but extremely similar). This gun was used on all fronts during the First World War by Royal Field Artillery. This gun put at fire high-explosive shells (HE), chemical (GAS) and Shrapnels. It was the standard field gun of Royal Army and the armies of the Commonwealth during the " Great GWar" and was produced in very great number in three principal models. The traction of this gun was ensured by horses, mechanization will intervene that in the Thirties.
The first model, the 18-pounder Mark I Ordnance Quick Firing (QF) was quickly replaced on the production lines by Mark II, a model rationalized for a better mass production. Mark III is an experimental model which was never produced. Certain guns Mark I and Mark II will be still used during inter-war period (in particular Russia in 1919) and even during the second world war, by the BEF in Europe in 1940 and briefly by after in the Far East and North Africa.
Le modèle le plus connu, fut cependant le Mark IV dont les premiers exemplaires furent testés en 1916 et qui sera livré sur le front à partir de 1918. La nouvelle culasse Ashbury permettait une meilleure cadence de tir. Le Mark V est en fait un canon-automoteur chenillé, étudié en 1926, qui ne fut cependant jamais opérationnel. Dans les années trente, beaucoup de Mark IV seront reconvertis en 25-pounder. The model more known, was however the Mark IV whose first specimens were tested in 1916 and who will be delivered on the front as from 1918. The new Ashbury breech allowed a better rate of fire. The Mark V is in fact tracked self-propelled gun, studied in 1926, which was however never operational. Into the Thirties, much of Mark IV will be reconverted in 25-pounder.
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