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| BL 6-inch 26 cwt howitzer | |
|---|---|
| Name | BL 6-inch 26 cwt howitzer |
| Origin | United Kingdom |
| Type | Howitzer |
| Service | 1909–1945 |
| Wars | First World War, Irish War of Independence, Third Anglo-Afghan War, Russian Civil War, Irish Civil War, Third Anglo-Afghan War |
| Designer | Royal Ordnance Factories |
| Design date | 1908–1909 |
| Manufacturer | Royal Arsenal, Vickers, Elswick Ordnance Company |
| Production date | 1909–1918 |
| Number | approx. 3,700 |
| Weight | 26 cwt (1,311 kg) (barrel and breech) |
| Part length | 84 in (14 calibres) |
| Cartridge | 100 lb 6-inch shell |
| Caliber | 6 in (152 mm) |
| Action | Breech-loading |
| Rate | 2–4 rpm |
| Velocity | 900 ft/s (274 m/s) |
| Max range | 10,210 yd (9,340 m) |
| Breech | single-motion screw |
| Recoil | horizontally sliding block, hydraulic buffer and spring recuperator |
| Carriage | wheeled box trail |
BL 6-inch 26 cwt howitzer
The BL 6-inch 26 cwt howitzer was a British coastal and field artillery piece adopted in 1909 and widely employed by the Royal Field Artillery, Royal Garrison Artillery, and colonial forces during the First World War and interwar conflicts. Designed to deliver high-angle bombardment with a 100 lb shell, it became a standard medium howitzer for British and Commonwealth formations and influenced subsequent designs used in Second World War campaigns.
Development began in the wake of lessons from the Boer War and debates within the Committee on Ordnance and War Office about artillery calibres and mobility, prompting the Royal Ordnance Factories and designers at Woolwich Arsenal to produce a 6-inch howitzer with a barrel weight of 26 cwt. The design reflected input from commanders in the British Expeditionary Force and engineers acquainted with work at Dublin Port, Gibraltar, and Aden who required a compromise between the heavy BL 60-pounder gun and lighter mountain pieces used in Egypt Campaigns. The howitzer used a new single-motion interrupted-screw breech and a hydropneumatic recoil system developed at Enfield and tested alongside prototypes at the Firing Range, Shoeburyness and trials at Hythe. Influential figures including Sir William Henry Brassey and Major-General Sir Henry Jackson contributed technical assessments to the Directorate of Artillery Production and Army Council.
The standard model featured a 84-inch barrel (14 calibres), firing a 100 lb shell to about 10,210 yd with a muzzle velocity near 900 ft/s; it weighed 26 cwt for the barrel and breech assembly. Variants included a Mk I with a fixed trail, a Mk II with strengthened recoil buffers, and carriage adaptations for siege and naval mountings employed by Royal Navy auxiliaries and fortress batteries at Scapa Flow and Portsmouth. Ammunition types encompassed high-explosive, shrapnel, and gas shells introduced following chemical warfare developments after the Second Battle of Ypres. Modifications for motor traction, proposed by officers from Royal Army Service Corps and implemented in workshops at Vickers and Elswick Ordnance Company, allowed towing by motor lorries and captured tractors in later campaigns. The breech mechanism shared elements with contemporary pieces like the BL 60-pounder gun and influenced later designs from Woolwich and Royal Ordnance Factories.
The howitzer entered service with the Royal Field Artillery and Royal Garrison Artillery shortly before the First World War, equipping batteries that deployed to the Western Front, the Gallipoli Campaign, the Salonika Campaign, and the Mesopotamian campaign. Batteries armed with the piece supported infantry during major actions including the Battle of the Somme, Arras, and the Third Battle of Ypres. In the postwar era, it remained in service with units stationed in Ireland, participating in operations during the Irish War of Independence and Irish Civil War, and with colonial contingents in India during the Third Anglo-Afghan War. Some were supplied to expeditionary forces in Soviet Russia during the Russian Civil War and retained by reserve and training formations through the 1920s and 1930s, before gradual replacement by newer designs in Royal Artillery establishment lists.
Tactically, the howitzer was employed for counter-battery fire, destruction of fortifications, interdiction of supply routes, and preparation of infantry assaults, coordinated with signals from observers at Observation Posts and aerial spotting from Royal Flying Corps squadrons and later Royal Air Force units. Techniques refined during its use included predicted fire based on data provided by the Ordnance Survey and ranging provided by British Army survey sections, rolling barrages synchronized with infantry advances as in the Battle of the Somme, and creeping barrages developed by artillery planners influenced by officers such as Major-General Henry Hugh Tudor. Logistic support involved ammunition supply chains managed by the Royal Army Service Corps and maintenance by workshops of the Royal Engineers and private firms like Vickers.
Manufacture was undertaken at Royal Arsenal, Woolwich, Vickers, Woolwich Arsenal, and private yards including Elswick Ordnance Company and subcontractors in Sheffield and Barrow-in-Furness, producing approximately 3,700 units and components. Primary operators included the British Army, Canadian Expeditionary Force, Australian Imperial Force, New Zealand Expeditionary Force, and colonial forces in India and South Africa. Postwar transfers placed examples with paramilitary and reserve units in Ireland and Commonwealth militaries in Canada and Australia. Captured pieces were employed by occupying units and improvised artillery units during the Russian Civil War.
Surviving examples of the howitzer are preserved at military museums such as the National Army Museum (United Kingdom), Imperial War Museum, Royal Artillery Museum, and local collections in Auckland Museum and the Canadian War Museum, where they illustrate early 20th-century ordnance development. The design influenced later British 6-inch field and medium howitzers and informed interwar doctrines codified in manuals produced at Woolwich and training at the Royal Military Academy Sandhurst and Blenheim Barracks. As artifacts, they serve as focal points in studies of First World War artillery, conservation efforts by heritage organizations, and in commemorations linked to sites like Thiepval Memorial and Ypres battlefields.
Category:Field artillery Category:World War I artillery of the United Kingdom