45 mm/46 21-K (45 mm) - Revision history

U38088265: /* Available ammunition */ Converted to transclusion

2024-04-17T20:14:04Z

‎Available ammunition: Converted to transclusion

U22067555: /* Vehicles equipped with this weapon */ Added Opytny

2023-12-09T23:40:49Z

‎Vehicles equipped with this weapon: Added Opytny

U38088265: /* Vehicles equipped with this weapon */

2023-02-14T18:48:20Z

‎Vehicles equipped with this weapon

U38088265: /* Vehicles equipped with this weapon */

2022-11-12T20:06:22Z

‎Vehicles equipped with this weapon

U38088265: /* History */

2022-10-08T10:26:08Z

‎History

U137319744: /* History */ added history

2022-10-04T03:08:39Z

‎History: added history

U38088265 at 18:07, 27 June 2022

2022-06-27T18:07:29Z

U38088265: /* Available ammunition */ Updated

2022-06-27T18:06:43Z

‎Available ammunition: Updated

U38088265: /* Available ammunition */

2021-12-20T16:20:17Z

‎Available ammunition

U44629479: Edits / Notice: Please do not delete or change the text written in between the arrows in the future

2021-12-20T16:08:12Z

Edits / Notice: Please do not delete or change the text written in between the arrows in the future

@@ Line 27: / Line 27: @@
 * '''F-73''' - Base-fuze HE shell, effectively acts like an APHE shell with larger explosive mass, is quite effective at dealing damage against ship modules as it penetrates the hull
-{| class="wikitable sortable" style="text-align:center" width="100%"
+{{:{{PAGENAME}}/Ammunition|45 mm OR-73A HET, 45 mm O-240 HE, 45 mm BR-240, 45 mm F-73}}
 === Comparison with analogues ===

@@ Line 13: / Line 13: @@
 * {{Specs-Link|ussr_mbk_161_1943}}
 * {{Specs-Link|ussr_destroyer_moskva}}
 * {{Specs-Link|ussr_cruiser_voroshilov}}

@@ Line 6: / Line 6: @@
 <!-- ''List out vehicles that are equipped with the weapon.'' -->
 * {{Specs-Link|ussr_destroyer_frunze}}
 * {{Specs-Link|ussr_cruiser_kirov}}

@@ Line 6: / Line 6: @@
 <!-- ''List out vehicles that are equipped with the weapon.'' -->
 * {{Specs-Link|ussr_destroyer_frunze}}
 * {{Specs-Link|ussr_cruiser_kirov}}

@@ Line 88: / Line 88: @@
 == History ==
-The 21-K is a naval derivative of the Soviet [[20-K (45 mm)|20-K]] a tank cannon. More specifically both guns share the same progenitor, the 19-K 45 mm anti-tank gun model 1942, a scaled-up variant of a gun from Rheinmetall. The modification for use as a naval anti-aircraft gun was a simple matter of replacing the carriage with a pedestal mount and giving the gun a semi-automatic breech though when production began in 1934, only a quarter of the guns had this breech. The early guns were older built-up gun designs, but they would be replaced with monobloc barrels later in production. Because it was semi-automatic, the gun struggled compared to the auto-cannons use by other nations. It also suffered from not having a time fuse meaning it could only destroy aircraft with a direct hit. In 1936-37, a new mount for the 21-K was created for use on river monitors called the 40-K along with the 41-K which was a twin-mount 42 of both mounts were ultimately built. 2,799 guns were built in total from 1934 until 1947 though by 1941 it was largely superseded by the smaller, automatic [[70-K (37 mm)|70-K]] as the Soviet Navy's main anti-aircraft gun. In 1942, production was switched to the upgraded [[21-KM (45 mm)|21-KM]].
+<!-- ''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>.'' -->
 == Media ==

@@ Line 88: / Line 88: @@
 == 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>.''
+The 21-K is a naval derivative of the Soviet [[20-K (45 mm)|20-K]] a tank cannon. More specifically both guns share the same progenitor, the 19-K 45 mm anti-tank gun model 1942, a scaled-up variant of a gun from Rheinmetall. The modification for use as a naval anti-aircraft gun was a simple matter of replacing the carriage with a pedestal mount and giving the gun a semi-automatic breech though when production began in 1934, only a quarter of the guns had this breech. The early guns were older built-up gun designs, but they would be replaced with monobloc barrels later in production. Because it was semi-automatic, the gun struggled compared to the auto-cannons use by other nations. It also suffered from not having a time fuse meaning it could only destroy aircraft with a direct hit. In 1936-37, a new mount for the 21-K was created for use on river monitors called the 40-K along with the 41-K which was a twin-mount 42 of both mounts were ultimately built. 2,799 guns were built in total from 1934 until 1947 though by 1941 it was largely superseded by the smaller, automatic [[70-K (37 mm)|70-K]] as the Soviet Navy's main anti-aircraft gun. In 1942, production was switched to the upgraded [[21-KM (45 mm)|21-KM]].
 == Media ==
@@ Line 98: / Line 98: @@
 * ''references to approximate analogues by other nations and research trees.'' -->
-* [[20-K (45 mm)|20-K]]
+* [[20-K (45 mm)|20-K]] - Tank cannon variant
 * [[45 mm/68 21-KM (45 mm)|45 mm/68 21-KM]] - Variant with longer barrel and higher muzzle velocity
 * [[3.7 cm SK C/30 (37 mm)|3.7 cm SK C/30]] - German anti-aircraft gun with similar rate of fire
@@ Line 104: / Line 104: @@
 == External links ==
 ''Paste links to sources and external resources, such as:''
 * ''topic on the official game forum;''
 * ''other literature.''

@@ Line 64: / Line 64: @@
 | BR-240 || APHE || 760 || 1.42 || 1 || 1.5 || 27.72 || 47° || 60° || 65°
 |-
-| F-73 || HE || 760 || 1.41 || 0.015 || 0.1 || 113.96 || 79° || 80° || 81°
+| F-73 || HE || 760 || 1.41 || 0.015 s || 0.1 || 113.96 || 79° || 80° || 81°
 |-
 |}

@@ Line 39: / Line 39: @@
 | O-240 HE || HE || 5 || 5 || 5 || 5 || 5 || 5
 |-
-| BR-240 || APHE || 75 || 58 || 48 || 41 || 36 || 32
+| BR-240 || APHE || 75 || 55 || 38 || 27 || 20 || 15
 |-
-| F-73 || HE with base fuze || 21 || 16 || 14 || 11 || 10 || 9
+| F-73 || HE with base fuze || 20 || 15 || 10 || 7 || 5 || 4
 |-
 |}
@@ Line 64: / Line 64: @@
 | BR-240 || APHE || 760 || 1.42 || 1 || 1.5 || 27.72 || 47° || 60° || 65°
 |-
-| F-73 || HE || 760 || 1.41 || 1.5 || 0.1 || 113.96 || 79° || 80° || 81°
+| F-73 || HE || 760 || 1.41 || 0.015 || 0.1 || 113.96 || 79° || 80° || 81°
 |-
 |}

@@ Line 31: / Line 31: @@
 ! rowspan="2" data-sort-type="text" | Ammunition
 ! rowspan="2" | Type of<br>warhead
-! colspan="6" | '''Penetration @ 0° Angle of Attack (mm)'''
+! colspan="6" | Penetration @ 0° Angle of Attack (mm)
 |-
-! 10 m !! 100 m !! 500 m !! 1,000 m !! 1,500 m !! 2,000 m
+! 100 m !! 1,000 m !! 2,000 m !! 3,000 m !! 4,000 m !! 5,000 m
 |-
 | OR-73A HET || HE || 3 || 3 || 3 || 3 || 3 || 3
@@ Line 45: / Line 45: @@
 |}
 {| class="wikitable sortable" style="text-align:center" width="100%"
-! colspan="11" | Shell details
+! colspan="10" | Shell details
 |-
 ! rowspan="2" data-sort-type="text" | Ammunition
@@ Line 58: / Line 58: @@
 ! 0% !! 50% !! 100%
 |-
-| OR-73A HET || HE || 760 || 1.41 || N/A || 0.1 || 56.98 || 79° || 80° || 81°
+| OR-73A HET || HE || 760 || 1.41 || 0 || 0.1 || 56.98 || 79° || 80° || 81°
 |-
-| OR-240 HE || HE|| 335 || 2.14 || N/A || 0.1 || 181.72 || 79° || 80° || 81°
+| O-240 HE || HE || 335 || 2.14 || 0 || 0.1 || 181.72 || 79° || 80° || 81°
 |-
-| BR-240SP || APHE || 760 || 1.42 || 1 || 1.5 || 27.72 || 47° || 60° || 65°
+| BR-240 || APHE || 760 || 1.42 || 1 || 1.5 || 27.72 || 47° || 60° || 65°
 |-
-| F-73 || HE with base fuze || 760 || 1.41 || 1.5 || 0.1 || 113.96 || 79° || 80° || 81°
+| F-73 || HE || 760 || 1.41 || 1.5 || 0.1 || 113.96 || 79° || 80° || 81°
 |-
 |}

@@ 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. 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.'' -->
 The '''45 mm/46 21-K''' is a Soviet anti-aircraft gun derived from the [[20-K (45 mm)|20-K]] tank gun. It is equipped on a number of Soviet coastal and bluewater vessels.
@@ Line 19: / Line 19: @@
 === Available ammunition ===
-'''<!-- 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). -->'''
+<!-- ''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).'' -->
 * '''OR-73A HET''' - Stock HE shell, has low explosive mass and should be replaced quickly
@@ Line 72: / Line 72: @@
 == Usage in battles ==
-<!-- 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. -->
+<!-- ''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.'' -->
 Much like in real life, the 21-K is horrible at its intended role, anti-aircraft. Its low rate of fire means it is only effective at hitting aircraft when massed, like on [[Maxim Gorky]].  On ships with few mounts like [[Frunze]], the 21-K is essentially useless at shooting down aircraft, but it can be used as a weapon against small boats, where its HE shells can be effective at destroying them.
 === Pros and cons ===
-''Summarise 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:'''
 * Can destroy aircraft in one hit
-* Somewhat effective at fighting small boats with HE and base-fuze HE shells
+* Somewhat effective at fighting small boats with HE and base-fused HE shells
 '''Cons:'''
@@ Line 93: / Line 93: @@
 ''Excellent additions to the article would be video guides, screenshots from the game, and photos.''
-== See also ==<!-- Links to the articles on the War Thunder Wiki that you think will be useful for the reader, for example:
+== 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;
+* ''reference to the article about the variant of the cannon/machine gun;''
-references to approximate analogues by other nations and research trees. -->
+* ''references to approximate analogues by other nations and research trees.'' -->
 * [[20-K (45 mm)|20-K]]
-* [[45 mm/68 21-KM (45 mm)|45 mm/68 21-KM]] - Variant with longer barrel and higher velocity shells
+* [[45 mm/68 21-KM (45 mm)|45 mm/68 21-KM]] - Variant with longer barrel and higher muzzle velocity
-* [[3.7 cm SK C/30 (37 mm)|3.7 cm SK C/30]] - German anti-aircraft gun with similar low rate of fire
+* [[3.7 cm SK C/30 (37 mm)|3.7 cm SK C/30]] - German anti-aircraft gun with similar rate of fire
 == External links ==
 ''Paste links to sources and external resources, such as:''
 * ''topic on the official game forum;''
 * ''other literature.''