West Spring Gun

West Spring Gun
TypeCatapult
Place of originUnited Kingdom
Service history
In service1915–1916
Used byUnited Kingdom
Canada
Australia
WarsWorld War I
Production history
DesignerCaptain Allen West
Designed1915
ManufacturerReason Manufacturing Company
Produced1915-1916
Specifications
Mass284 lb (129 kg)
Length71.5 in (182 cm)
Width18.5 in (47 cm)
Height88 in (220 cm)
Crew5
Effective firing range240 yd (220 m)

The West Spring Gun was a bomb-throwing catapult used by British, Canadian and Australian forces during World War I. It was designed to throw a hand grenade in a high trajectory into enemy trenches.

Description

It consisted of a metal frame supporting a throwing arm powered by 24 metal springs.[1] It was invented by Captain Allen West in 1915 and manufactured by the Reason Manufacturing Company of Brighton, which was granted a patent for the device on 19 October of that year.[1][2] Although called a catapult, it was a hybrid of a ballista and a trebuchet. It required a crew of five - three to compress the springs, one to load the bomb, and one to fire as soon as the fuse was lit or the grenade pin was pulled.[3]

In tests, it could throw Mills bomb about 240 yd (220 m) or a 7 lb (3.2 kg) projectile about 80 yd (73 m) with a flight time of 6 or 7 seconds.[4] In the field it generally threw a Jam Tin Grenade, No. 15 Ball grenade, No. 21 "Spherical" grenade or No. 28 chemical grenade, equipped with a slightly longer fuse (typically 9 seconds) to ensure to reach the enemy trench before exploding.[2] It was used in combat by, amongst others, the 50th (Northumbrian) Division and the 1st Canadian Division in the Second Battle of Ypres and by Australian forces in the Gallipoli Campaign.[2][5] It was generally considered to be large and cumbersome and "generally more unwieldy" than the Leach Trench Catapult.[4] Many operators, including Captain West himself, lost fingers in the mechanism.[1] The throw could also be unpredictable, with the bomb sometimes landing near the thrower.[6]

Production of this and other trench catapults was officially halted in 1916, being replaced by the 2 inch Medium Trench Mortar and Stokes mortar.[7]

Ammunition

  • No 21 R grenade
    No 21 R grenade

References

  1. ^ a b c Gary Sheffield (2007). War on the Western Front: In the Trenches of World War I. Osprey Publishing. p. 201. ISBN 978-1846032103.
  2. ^ a b c Anthony Saunders (1999). Weapons of the Trench War: 1914-1918. Sutton. p. 65. ISBN 978-0750918183.
  3. ^ Clifford Almon Wells (1917). From Montreal to Vimy Ridge and beyond: the correspondence of Lieut. Clifford Almon Wells, B.A., of the 8th battalion, Canadians, B.e.f., November, 1915-April, 1917. George H. Doran company. p. 87.
  4. ^ a b The Royal Engineers Journal. 39: 79. 1925. {{cite journal}}: Missing or empty |title= (help)
  5. ^ Kenneth Radley (2006). We lead, others follow: First Canadian Division, 1914-1918. Vanwell. p. 120. ISBN 978-1551251004.
  6. ^ "Grenade, West Spring Gun, No 21 R Type". Imperial War Museum.
  7. ^ Hugh Chisholm (1922). The Encyclopædia Britannica: Volume 22; page 470 volume 30.4 "Bombthrowers" 1922 Edition, Volume 1. Encyclopædia Britannica Company Limited. p. 470. This article is unpublished

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