L21A1 (30 mm) - Revision history

U44629479: Edits

2024-03-23T22:39:07Z

Edits

U20033410: /* added fox*/

2024-03-23T22:08:42Z

‎added fox

U44629479: /* Vehicles equipped with this weapon */ Edits

2024-03-14T05:22:09Z

‎Vehicles equipped with this weapon: Edits

U113749792: added the fox to the vehicles that can use the L21A1 cannon

2024-03-13T23:00:47Z

added the fox to the vehicles that can use the L21A1 cannon

U9202753: Thumbnail added.

2023-07-14T15:48:44Z

Thumbnail added.

U44629479: Edits

2023-02-21T20:30:31Z

Edits

U28580205: Added short description and info to P&C

2022-03-23T13:48:11Z

Added short description and info to P&C

U28580205: /* External links */ Added archive links

2021-11-09T19:13:06Z

‎External links: Added archive links

U38088265: Updated page template

2021-09-12T15:57:24Z

Updated page template

U28580205: /* External links */ Alphabetize bibliography

2021-03-26T17:53:39Z

‎External links: Alphabetize bibliography

@@ Line 3: / Line 3: @@
 == Description ==
 <!--''Write an introduction to the article in 2-3 small paragraphs. Briefly tell us about the history of the development and combat using the weaponry and also about its features. Compile a list of air, ground, or naval vehicles that feature this weapon system in the game.''-->
-The '''30 mm L21A1''', also known as the '''RARDEN''', is a British autocannon used on their armoured fighting vehicles. Currently, the only vehicles using the L21A1 cannon are the FV510 Warrior and the FV721 Fox armored car.
+The '''30 mm L21A1''', also known as the '''RARDEN''', is a British autocannon used on their armoured fighting vehicles. With its APDS round, the L21A1 has one of the higher penetrating rounds for an autocannon for a ground vehicle in the game that can take out most other light tanks with ease. However, the trade-off is a lower firing rate and restricted magazine size of 6 rounds.
 === Vehicles equipped with this weapon ===

@@ Line 3: / Line 3: @@
 == Description ==
 <!--''Write an introduction to the article in 2-3 small paragraphs. Briefly tell us about the history of the development and combat using the weaponry and also about its features. Compile a list of air, ground, or naval vehicles that feature this weapon system in the game.''-->
-The '''30 mm L21A1''', also known as the '''RARDEN''', is a British autocannon used on their armoured fighting vehicles. Currently, the only vehicle using the L21A1 cannon is the FV510 Warrior.
+The '''30 mm L21A1''', also known as the '''RARDEN''', is a British autocannon used on their armoured fighting vehicles. Currently, the only vehicles using the L21A1 cannon are the FV510 Warrior and the FV721 Fox armored car.
 With its APDS round, the L21A1 has one of the higher penetrating rounds for an autocannon for a ground vehicle in the game that can take out most other light tanks with ease. However, the trade-off is a lower firing rate and restricted magazine size of 6 rounds.

@@ Line 10: / Line 10: @@
 <!-- ''List out vehicles that are equipped with the weapon.'' -->
 * {{Specs-Link|uk_fv510_isv}}
 == General info ==

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 * {{Specs-Link|uk_fv510_isv}}
 == General info ==
@@ Line 28: / Line 29: @@
 '''Pros:'''
 * High-penetrating APDS round available for its calibre size
 * APDS belt is homogeneous, guaranteeing a APDS round each shot compared to mixed belt compositions
 '''Cons:'''
 * 6 round magazine requires careful shot placements to make most use of the available rounds
 * Low rate of fire
@@ Line 43: / Line 46: @@
 The 30 mm autocannon developed was desired to have a sufficient anti-armour capability to defeat a Soviet APC from any angle up to 1,000 m away, with an ability to penetrate the side armour of Soviet main battle tanks as well. The autocannon should also be able to provide effective fire on soft targets and be able to deter low-flying aircraft such as helicopters. Additionally, the gun is to be reliable, accurate, lightweight, and be able to be mounted on a large variety of vehicles. These are tough specifications under the considerations that an effective vehicle-mounted cannon requires a low trunnion pull (recoil force) and a short inboard length (recoil length). To account for this, the weapon would have a low rate of fire and a long recoil mechanism, which effectively reduced the trunnion pull to 3,000 ft-lb (~4067 J), which is halved compared to other 30 mm autocannons of the time. The inboard length is reduced to a maximum of 9 in. (~23 cm), due in part with the absence of a ramming breech block and its associated return spring, as well as the loading and recoil mechanism that allowed the inboard length to load the 11.25 in. (~28.6 cm) round without issue.
-Ammunition for the cannon are derived from the [[HSS 831L (30 mm)|Hispano-Suiza 831L]], with a new APDS ammunition was developed by RARDE for the armour-pericing role. The use of aluminum alloy in the gun body and high quality steel in the barrel kept the weapon lightweight (the barrel itself was only 54 lb. (~24 kg)). Barrel dampeners, as well as the low fire rate, help prevent barrel vibrations from affecting gun accuracy. The weapon, known as the 30 mm Gun L21E2 during development,<ref name="Hobart_Rarden"/> was standardized in the British military as the '''L21A1'''.<ref name="WS_Rarden">WeaponSystems.net "30mm Rarden"</ref> The weapon was also given the name '''RARDEN''', the name derived from its designers ("'''R'''oyal '''A'''rmament, '''R'''esearch and '''D'''evelopment '''E'''stablishment" and "E'''n'''field").
+Ammunition for the cannon are derived from the [[HSS 831L (30 mm)|Hispano-Suiza 831L]], with a new APDS ammunition was developed by RARDE for the armour-pericing role. The use of aluminum alloy in the gun body and high quality steel in the barrel kept the weapon lightweight (the barrel itself was only 54 lb. (~24 kg)). Barrel dampeners, as well as the low fire rate, help prevent barrel vibrations from affecting gun accuracy. The weapon, known as the 30 mm Gun L21E2 during development,<ref name="Hobart_Rarden" /> was standardized in the British military as the '''L21A1'''.<ref name="WS_Rarden">WeaponSystems.net "30mm Rarden"</ref> The weapon was also given the name '''RARDEN''', the name derived from its designers ("'''R'''oyal '''A'''rmament, '''R'''esearch and '''D'''evelopment '''E'''stablishment" and "E'''n'''field").
-The L21A1 RARDEN would see use on the Fox armoured car, the [[Warrior]] IFV, and the Scimitar reconnaissance vehicle. The weapon would undergo an upgrade in the 1980s into the ''L21A2'', which featured a redesigned barrel among other minor improvements.<ref name="WS_Rarden"/>
+The L21A1 RARDEN would see use on the Fox armoured car, the [[Warrior]] IFV, and the Scimitar reconnaissance vehicle. The weapon would undergo an upgrade in the 1980s into the ''L21A2'', which featured a redesigned barrel among other minor improvements.<ref name="WS_Rarden" />
 == Media ==
@@ Line 52: / Line 55: @@
 == See also ==
 ''Links to the articles on the War Thunder Wiki that you think will be useful for the reader, for example:''
 * ''reference to the article about the variant of the cannon/machine gun;''
 * ''references to approximate analogues by other nations and research trees.''
@@ Line 61: / Line 65: @@
 === References ====
 ;Citations
 <references />
 ;Bibliography
 * Hobart, Major F.W.A. "The RARDEN Cannon". ''Armor'', January-February 1974, pp. 18–24. ([https://babel.hathitrust.org/cgi/pt?id=uc1.d0003314150&view=1up&seq=26 Online Archive]) ([https://web.archive.org/web/20210403215253/https://babel.hathitrust.org/cgi/pt?id=uc1.d0003314150&view=1up&seq=26 Archive.org copy])
 * Tobin, Edmund. "Norman Brint designed the Rarden 30mm cannon at the Royal Small Arms Factory". ''East London and West Essex Guardian Series'', Newsquest Media Group Ltd., 09 Apr. 2010, [https://www.guardian-series.co.uk/news/8091281.waltham-abbey-award-winning-gun-designer-dies/ Website]. Accessed 26 Mar. 2021. ([https://web.archive.org/web/20211109191043/https://www.guardian-series.co.uk/news/8091281.waltham-abbey-award-winning-gun-designer-dies/ Archive])

← Older revision		Revision as of 15:48, 14 July 2023
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		+	[[File:Weapon L21A1 (30 mm).png\|thumb\|right\|x250px\|The 30 mm L21A1 on the Warrior gun mantlet.]]
		+
	== Description ==		== Description ==
	<!--''Write an introduction to the article in 2-3 small paragraphs. Briefly tell us about the history of the development and combat using the weaponry and also about its features. Compile a list of air, ground, or naval vehicles that feature this weapon system in the game.''-->		<!--''Write an introduction to the article in 2-3 small paragraphs. Briefly tell us about the history of the development and combat using the weaponry and also about its features. Compile a list of air, ground, or naval vehicles that feature this weapon system in the game.''-->

@@ Line 26: / Line 26: @@
 '''Pros:'''
-* High-penetrating APDS round available for its caliber size.
+* High-penetrating APDS round available for its calibre size
-* APDS belt is homogenous, guaranteeing a APDS round each shot compared to mixed belt compositions.
+* APDS belt is homogeneous, guaranteeing a APDS round each shot compared to mixed belt compositions
 '''Cons:'''
-* 6 round magazine requires careful shot placements to make most use of the available rounds.
+* 6 round magazine requires careful shot placements to make most use of the available rounds
 * Low rate of fire
-* Relatively high recoil when firing compared to other autocannons.
+* Relatively high recoil when firing compared to other autocannons
 == History ==
 <!-- ''Examine the history of the creation and combat usage of the weapon in more detail than in the introduction. If the historical reference turns out to be too long, take it to a separate article, taking a link to the article about the weapon and adding a block "/History" (example: <nowiki>https://wiki.warthunder.com/(Weapon-name)/History</nowiki>) and add a link to it here using the <code>main</code> template. Be sure to reference text and sources by using <code><nowiki><ref></ref></nowiki></code>, as well as adding them at the end of the article with <code><nowiki><references /></nowiki></code>.'' -->
-Considerations for a new vehicle-mounted weapon for the infantry took into account that a Soviet invasion of Europe would have the Soviet armoured forces tie down most of NATO armoured assets. In this event, NATO infantry would have minimal armour support against the Soviet's mechanized infantry, which are usually supported by armoured personnel carriers or infantry fighting vehicles in the form of BTRs or BMPs. As such, a vehicle-mounted weapon capable of defeating these Soviet vehicles from 1,000 meters away was desired to force the infantry to disembark and allow effective mortar and artillery fire to decimate them. Settling on a high-velocity autocannon weapon type for the role, it was found that current autocannons in service did not meet the British requirements for a vehicle-mounted armament. The British decided to pursue a path of producing a completely new 30 mm autocannon to fit their needs. This task was taken up between the Royal Armament Research and Development Establishment (RARDE) and the Royal Small Arms Factory at Enfield.<ref name="Hobart_Rarden">Hobart 1974, pg 18-24</ref> Norman Brint of the Royal Small Arms Factory became the cannon's main designer.<ref name="Tobin_Guardian">Tobin 2010</ref>
+Considerations for a new vehicle-mounted weapon for the infantry took into account that a Soviet invasion of Europe would have the Soviet armoured forces tie down most of NATO armoured assets. In this event, NATO infantry would have minimal armour support against the Soviet's mechanized infantry, which are usually supported by armoured personnel carriers or infantry fighting vehicles in the form of BTRs or BMPs. As such, a vehicle-mounted weapon capable of defeating these Soviet vehicles from 1,000 m away was desired to force the infantry to disembark and allow effective mortar and artillery fire to decimate them. Settling on a high-velocity autocannon weapon type for the role, it was found that current autocannons in service did not meet the British requirements for a vehicle-mounted armament. The British decided to pursue a path of producing a completely new 30 mm autocannon to fit their needs. This task was taken up between the Royal Armament Research and Development Establishment (RARDE) and the Royal Small Arms Factory at Enfield.<ref name="Hobart_Rarden">Hobart 1974, pg 18-24</ref> Norman Brint of the Royal Small Arms Factory became the cannon's main designer.<ref name="Tobin_Guardian">Tobin 2010</ref>
 [[File:Saber Junction 2012 121017-A-HE359-129 - Warrior Crew.jpg|x250px|thumb|right|none|A Warrior IFV from the Mercian Regiment with its L21A1 RARDEN.]]
-The 30 mm autocannon developed was desired to have a sufficient anti-armour capability to defeat a Soviet APC from any angle up to 1,000 meters away, with an ability to penetrate the side armour of Soviet main battle tanks as well. The autocannon should also be able to provide effective fire on soft targets and be able to deter low-flying aircraft such as helicopters. Additionally, the gun is to be reliable, accurate, lightweight, and be able to be mounted on a large variety of vehicles. These are tough specifications under the considerations that an effective vehicle-mounted cannon requires a low trunnion pull (recoil force) and a short inboard length (recoil length). To account for this, the weapon would have a low rate of fire and a long recoil mechanism, which effectively reduced the trunnion pull to 3,000 ft-lb (~4067 J), which is halved compared to other 30 mm autocannons of the time. The inboard length is reduced to a maximum of 9 in. (~23 cm), due in part with the absence of a ramming breech block and its associated return spring, as well as the loading and recoil mechanism that allowed the inboard length to load the 11.25 in. (~28.6 cm) round without issue.
+The 30 mm autocannon developed was desired to have a sufficient anti-armour capability to defeat a Soviet APC from any angle up to 1,000 m away, with an ability to penetrate the side armour of Soviet main battle tanks as well. The autocannon should also be able to provide effective fire on soft targets and be able to deter low-flying aircraft such as helicopters. Additionally, the gun is to be reliable, accurate, lightweight, and be able to be mounted on a large variety of vehicles. These are tough specifications under the considerations that an effective vehicle-mounted cannon requires a low trunnion pull (recoil force) and a short inboard length (recoil length). To account for this, the weapon would have a low rate of fire and a long recoil mechanism, which effectively reduced the trunnion pull to 3,000 ft-lb (~4067 J), which is halved compared to other 30 mm autocannons of the time. The inboard length is reduced to a maximum of 9 in. (~23 cm), due in part with the absence of a ramming breech block and its associated return spring, as well as the loading and recoil mechanism that allowed the inboard length to load the 11.25 in. (~28.6 cm) round without issue.
 Ammunition for the cannon are derived from the [[HSS 831L (30 mm)|Hispano-Suiza 831L]], with a new APDS ammunition was developed by RARDE for the armour-pericing role. The use of aluminum alloy in the gun body and high quality steel in the barrel kept the weapon lightweight (the barrel itself was only 54 lb. (~24 kg)). Barrel dampeners, as well as the low fire rate, help prevent barrel vibrations from affecting gun accuracy. The weapon, known as the 30 mm Gun L21E2 during development,<ref name="Hobart_Rarden"/> was standardized in the British military as the '''L21A1'''.<ref name="WS_Rarden">WeaponSystems.net "30mm Rarden"</ref> The weapon was also given the name '''RARDEN''', the name derived from its designers ("'''R'''oyal '''A'''rmament, '''R'''esearch and '''D'''evelopment '''E'''stablishment" and "E'''n'''field").
@@ Line 57: / Line 57: @@
 * ''topic on the official game forum;''
 * ''other literature.'' -->
-;References:
 <references />
-;Bibliography:
+;Bibliography
 * Hobart, Major F.W.A. "The RARDEN Cannon". ''Armor'', January-February 1974, pp. 18–24. ([https://babel.hathitrust.org/cgi/pt?id=uc1.d0003314150&view=1up&seq=26 Online Archive]) ([https://web.archive.org/web/20210403215253/https://babel.hathitrust.org/cgi/pt?id=uc1.d0003314150&view=1up&seq=26 Archive.org copy])
 * Tobin, Edmund. "Norman Brint designed the Rarden 30mm cannon at the Royal Small Arms Factory". ''East London and West Essex Guardian Series'', Newsquest Media Group Ltd., 09 Apr. 2010, [https://www.guardian-series.co.uk/news/8091281.waltham-abbey-award-winning-gun-designer-dies/ Website]. Accessed 26 Mar. 2021. ([https://web.archive.org/web/20211109191043/https://www.guardian-series.co.uk/news/8091281.waltham-abbey-award-winning-gun-designer-dies/ Archive])

@@ Line 1: / Line 1: @@
 == Description ==
-''Write an introduction to the article in 2-3 small paragraphs. Briefly tell us about the history of the development and combat using the weaponry and also about its features. Make an air or ground vehicles list on which this weapon is installed in our game.''
+''Write an introduction to the article in 2-3 small paragraphs. Briefly tell us about the history of the development and combat using the weaponry and also about its features. Compile a list of air, ground, or naval vehicles that feature this weapon system in the game.''
 === Vehicles equipped with this weapon ===
 <!-- ''List out vehicles that are equipped with the weapon.'' -->
 * {{Specs-Link|uk_fv510_isv}}
@@ Line 9: / Line 10: @@
 ''Tell us about the tactical and technical characteristics of the cannon or machine gun.''
-=== Available shells ===
+=== Available ammunition ===
-''Describe the shells that are available for the cannon and their features and purpose. If it concerns autocannons or machine guns, write about different ammo belts and what is inside (which types of shells).''
+''Describe the shells that are available for the weapon and their features and purpose. If it concerns autocannons or machine guns, write about different ammo belts and what is inside (which types of shells).''
 === Comparison with analogues ===
-''Give a comparative description of cannons/machine guns, that have firepower equal to these type of weapons.''
+''Give a comparative description of cannons/machine guns that have firepower equal to this weapon.''
 == Usage in battles ==
-''Describe the cannon/machine gun in the game - its distinctive features, tactics of usage against the main opponents. Please don't write a "guide" - do not impose a single point of view, but give the reader food for thought.''
+''Describe the cannon/machine gun in the game - its distinctive features, tactics of usage against notable opponents. Please don't write a "guide" - do not impose a single point of view, but give the reader food for thought.''
 === Pros and cons ===
-''Summarize and briefly evaluate the weaponry in terms of its characteristics and combat effectiveness. Mark pros and cons as a list.''
+''Summarise and briefly evaluate the weaponry in terms of its characteristics and combat effectiveness. Mark pros and cons as a list.''
 '''Pros:'''
@@ Line 28: / Line 29: @@
 == History ==
-<!--''Examine the history of the creation and combat usage of this weapon. If the historical reference turns out to be too big, take it to a separate article, taking a link to an article about the vehicle and adding a block "/ History" (example: <nowiki>https://wiki.warthunder.com/(weapon-name)/History</nowiki>) and add a link to it here using the <code>main</code> template. Be sure to reference text and sources by using <code><nowiki><ref></nowiki></code>, as well as adding them at the end of the article.''-->
+<!-- ''Examine the history of the creation and combat usage of the weapon in more detail than in the introduction. If the historical reference turns out to be too long, take it to a separate article, taking a link to the article about the weapon and adding a block "/History" (example: <nowiki>https://wiki.warthunder.com/(Weapon-name)/History</nowiki>) and add a link to it here using the <code>main</code> template. Be sure to reference text and sources by using <code><nowiki><ref></ref></nowiki></code>, as well as adding them at the end of the article with <code><nowiki><references /></nowiki></code>.'' -->
 Considerations for a new vehicle-mounted weapon for the infantry took into account that a Soviet invasion of Europe would have the Soviet armoured forces tie down most of NATO armoured assets. In this event, NATO infantry would have minimal armour support against the Soviet's mechanized infantry, which are usually supported by armoured personnel carriers or infantry fighting vehicles in the form of BTRs or BMPs. As such, a vehicle-mounted weapon capable of defeating these Soviet vehicles from 1,000 meters away was desired to force the infantry to disembark and allow effective mortar and artillery fire to decimate them. Settling on a high-velocity autocannon weapon type for the role, it was found that current autocannons in service did not meet the British requirements for a vehicle-mounted armament. The British decided to pursue a path of producing a completely new 30 mm autocannon to fit their needs. This task was taken up between the Royal Armament Research and Development Establishment (RARDE) and the Royal Small Arms Factory at Enfield.<ref name="Hobart_Rarden">Hobart 1974, pg 18-24</ref> Norman Brint of the Royal Small Arms Factory became the cannon's main designer.<ref name="Tobin_Guardian">Tobin 2010</ref>
 [[File:Saber Junction 2012 121017-A-HE359-129 - Warrior Crew.jpg|x250px|thumb|right|none|A Warrior IFV from the Mercian Regiment with its L21A1 RARDEN.]]
@@ Line 39: / Line 40: @@
 == Media ==
-''An excellent addition to the article would be a video guide, as well as screenshots from the game and photos.''
+''Excellent additions to the article would be video guides, screenshots from the game, and photos.''
 == See also ==
@@ Line 47: / Line 48: @@
 == External links ==
-<!--''Paste links to sources and external resources, such as:''
+<!-- ''Paste links to sources and external resources, such as:''
 * ''topic on the official game forum;''
-* ''encyclopedia page on the tank;''
+* ''other literature.'' -->
 ;References:
 <references />

@@ Line 56: / Line 56: @@
 ;Bibliography:
 * Hobart, Major F.W.A. "The RARDEN Cannon". ''Armor'', January-February 1974, pp. 18–24. ([https://babel.hathitrust.org/cgi/pt?id=uc1.d0003314150&view=1up&seq=26 Online Archive])
 * WeaponSystems.net, "30mm Rarden". ''WeaponSystems.net'', [https://weaponsystems.net/system/355-30mm+Rarden Website]. Accessed 26 Mar. 2021.
 {{Britain tank cannons}}
 [[Category:Tank cannons]]