Ordnance QF 18 Pounder - History

History

During the Second Boer War the British government realised its field artillery was being overtaken by more modern "quick firing" guns of other major powers, and investigated replacements for its existing field gun, the BL 15 pounder 7 cwt. In 1900 General Sir Henry Brackenbury, the then Director-General of Ordnance, sent officers to visit European gun makers. At Rheinische Metallwaren und Machinenfabrik in Düsseldorf, they found a quick firing gun designed by Heinrich Ehrhardt with a recoil system that totally absorbed all the recoil of firing, 108 guns plus spares, were secretly purchased and entered service as the Ordnance QF 15 pounder in June 1901.

At the same time,the British Cabinet ordered Field Marshal Lord Roberts, the Commander-in-Chief in South Africa, to send home artillery brigade and battery commanders "selected for their eminence and experience" to form an Equipment Committee. The committee was chaired by General Sir George Marshall, who had been artillery commander in South Africa. It formed in January 1901 with a wide ranging area of study from horse-drawn mobile guns and the larger more static field guns, to harness design, and even binoculars. They swiftly established the "conditions to be fulfilled by proposed new equipment"; the most important were the "weight behind the team", then ballistics, rapidity of fire, weight of shell, provision of shield and number of rounds carried.

British gun manufacturers were invited to propose designs. Of the many entries, five for the horse artillery gun and three for the field gun were selected and their makers invited to submit a "specimen". These were tested in 1902, but none were found suitable for service although they all had good features. The makers were called to a conference and agreed to collaborate to produce a composite design. This used the Armstrong gun, Vickers' recoil system, and Royal Ordnance Factory's sighting and elevating gear and ammunition carrying. Reduced wheel size from 5 ft (1.5 m) to 4 ft 8 in (1.42 m) was also accepted (it had been a matter the Equipment Committee had to investigate) which saved weight. Four Artillery batteries of the composite design took part in trials of in 1903, and the new 18-pounder design was accepted.

The 18-pounder was used on all fronts during the First World War. It remained in service during the inter-war period. Starting in 1938, carriages Marks IV and V were converted to 25 Pounder Ordnance QF Mark 1 on Carriage Mark 1. 18-pounder Guns served with the British Expeditionary Force in France in the Second World War and were used in other theatres as well as for training or beach defence.

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