ZIS-4 (57 mm)

2024-08-21T09:37:28Z

U129027560: Added information about the gun

[[File:Weapon ZIS-4 (57 mm).png|thumb|right|x250px|The 57 mm ZIS-4 on the T-34-57 gun mantlet.]]

== Description ==
The ZiS-4 is a tank version of the 57 mm anti-tank gun Model 1941 (ZiS-2), developed in 1940 and mass-produced from 1941 to 1949. The ZiS-4 was produced together with the T-34-57 in 1941 and 1943.

=== Vehicles equipped with this weapon ===


* {{Specs-Link|ussr_su_57b}}
* {{Specs-Link|ussr_t_34_1941_57}}

== General info ==
'''The following shells are available for this gun:'''

* '''BR-271''' is an armor-piercing blunt-headed chamber projectile. The stock projectile is best used to destroy well-armored vehicles at a distance of more than 600 meters.
* '''BR-271K''' is an armor-piercing pointed-head chamber projectile. This projectile has better armor penetration at a distance of up to 600 meters.
* '''O-271''' - high-explosive fragmentation projectile. Used to destroy open self-propelled guns and self-propelled guns, as well as boats and aircraft.
* '''BR-271P''' - armor-piercing sub-caliber projectile. ''Present only on T-34-57 (1943)''

=== Available ammunition ===

{{:{{PAGENAME}}/Ammunition|BR-271, BR-271K, O-271}}

=== Comparison with analogues ===
The ZIS-4M's characteristics are identical to the following cannons:

* [[ZIS-2_(57_mm)]]
* [[ZIS-4M (57 mm)]]

== Usage in battles ==
The main purpose is the covert destruction of heavy tanks. The gun is very powerful and can destroy almost any enemy tank at its level with one shot.

=== Pros and cons ===
'''Pros:'''

* High penetration power
* Good rate of fire
* Fast reloading
* Good accuracy of the cannon

*

'''Cons:'''

* Small calibre gives it poorer post-penetration damage and HE damage than 75 and 85 mm cannons
* Lack of stabilization when moving

*

== History ==
''The production was planned for the summer of 1941, but due to the evacuation of the KhPZ, only 21 tanks equipped with this gun were produced. Mass production began in the fall of 1941, but it was soon halted due to the excessive power of the T-34-57. Production resumed only in 1943 with the mass appearance of the "Tigers" and "Panthers." The gun was modernized, receiving the designation ZiS-4M, and a new UBR-271K round was introduced. In the fall of 1943, production ceased due to the active development of the T-34-85.''

''The first combat use was recorded on October 14, 1941, during the offensive towards Kalinin. Over four days, 10 T-34-57s destroyed 34 German tanks, 210 vehicles, 25 anti-tank guns, and 1,000 soldiers and officers. However, on November 25, 1941, the 21st Tank Brigade, which included the T-34-57s, was destroyed. Later, the tanks were used again in 1943 during the Battle of Kursk.''

== Media ==
''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:''

* ''reference to the article about the variant of the cannon/machine gun;''
* ''references to approximate analogues by other nations and research trees.''

== External links ==
''Paste links to sources and external resources, such as:''

* ''topic on the official game forum;''
* ''other literature.''

{{USSR tank cannons}}

[[Category:Tank cannons]]

B-20M (20 mm)

2024-08-21T09:17:34Z

U129027560: Added some information to the blank page. Please check

{{About
| about = Soviet cannon '''{{PAGENAME}}'''
| usage = other versions
| link = B-20 (20 mm) (Family)
}}

== Description ==
[[File:411px-Б-20.jpg|thumb|B-20]]
''B-20 is a Soviet aviation small-caliber automatic cannon of 20 mm caliber. Created by weapons designer M.E. Berezin during the WW2 by remaking his 12.7 mm UB machine gun chambered for the 20 mm ShVAK cannon for a competition in which Vladimirov’s V-20 and Shpitalny’s Sh-20 designs.''

=== ''Available ammunition'' ===
=== Vehicles equipped with this weapon ===


* {{Specs-Link|yak-3_vk107}}
* {{Specs-Link|yak-3p}}
* {{Specs-Link|yak-9p}}
* {{Specs-Link|yak-9p_hungary}}

== General info ==
''The gun has 6 ammunition options. Use them depending on the situation and needs on the battlefield''

=== Available ammunition ===


* '''Default:''' {{Annotation|FI-T|Fragmentation incendiary tracer}}{{-}}{{Annotation|AP-I|Armour-piercing incendiary}}
* '''Universal:''' {{Annotation|FI-T|Fragmentation incendiary tracer}}{{-}}{{Annotation|HEF|High-explosive fragmentation}}{{-}}{{Annotation|AP-I|Armour-piercing incendiary}}{{-}}{{Annotation|FI-T|Fragmentation incendiary tracer}}
* '''Ground targets:''' {{Annotation|HEF|High-explosive fragmentation}}{{-}}{{Annotation|FI-T|Fragmentation incendiary tracer}}{{-}}{{Annotation|AP-I|Armour-piercing incendiary}}
* '''Tracers:''' {{Annotation|FI-T|Fragmentation incendiary tracer}}{{-}}{{Annotation|FI-T|Fragmentation incendiary tracer}}{{-}}{{Annotation|FI-T|Fragmentation incendiary tracer}}
* '''Armoured targets:''' {{Annotation|AP-I|Armour-piercing incendiary}}{{-}}{{Annotation|FI-T|Fragmentation incendiary tracer}}{{-}}{{Annotation|AP-I|Armour-piercing incendiary}}{{-}}{{Annotation|AP-I|Armour-piercing incendiary}}
* '''Stealth:''' {{Annotation|AP-I|Armour-piercing incendiary}}{{-}}{{Annotation|HEF|High-explosive fragmentation}}{{-}}{{Annotation|HEF|High-explosive fragmentation}}{{-}}{{Annotation|FI|Fragmentation incendiary}}

{| class="wikitable sortable" style="text-align:center" width="100%"
! colspan="10" | Penetration statistics
|-
! rowspan="2" data-sort-type="text" | Ammunition
! rowspan="2" | Type of warhead
! colspan="6" | Penetration @ 0° Angle of Attack (mm)
|-
! 10 m !! 100 m !! 500 m !! 1,000 m !! 1,500 m !! 2,000 m
|-
| FI-T || FI-T || 2 || 2 || 2 || 2 || 2 || 2
|-
| AP-I || AP-I || 28 || 24 || 14 || 7 || 4 || 2
|-
| HEF || HEF || 2 || 2 || 2 || 2 || 2 || 2
|-
| FI || FI || 2 || 2 || 2 || 2 || 2 || 2
|}
{| class="wikitable sortable" style="text-align:center" width="100%"
! colspan="10" | Shell details
|-
! rowspan="2" data-sort-type="text" | Ammunition
! rowspan="2" | Type of warhead
! rowspan="2" | Velocity (m/s)
! rowspan="2" | Projectile mass (kg)
! rowspan="2" | Fuse delay (m)
! rowspan="2" | Fuse sensitivity (mm)
! rowspan="2" | Explosive mass (TNT equivalent) (g)
! colspan="3" | Ricochet
|-
! 0% !! 50% !! 100%
|-
| FI-T || FI-T || 800 || 0.1 || 0.04 || 0.1 || 6.36 || 47° || 56° || 65°
|-
| AP-I || AP-I || 800 || 0.1 || N/A || N/A || N/A || 47° || 56° || 65°
|-
| HEF || HEF || 800 || 0.1 || 0.04 || 0.1 || 5.8 || 79° || 80° || 81°
|-
| FI || FI || 800 || 0.1 || 0.04 || 0.1 || 8.62 || 47° || 56° || 65°
|-
|}

=== Comparison with analogues ===
''Give a comparative description of cannons/machine guns that have firepower equal to this weapon.''

== Usage in battles ==
''First of all, this gun is designed for combat with enemy aircraft. Therefore, your main goal is to shoot down enemy planes, which the guns successfully cope with. But you can also destroy open or lightly armored vehicles''

=== Pros and cons ===
'''Pros:'''

* Decent rate of fire

*

'''Cons:'''

* AP-I ammunition can pen only 28mm of armor on 10m. Therefore, the aircraft is useless at defeating armour thicker than 20 mm
* Usually the gun has about 115-120 shots, which is often not enough.

*

== History ==
''The development of the weapon began back in 1941, with the GKO decree No. 106 "On the testing of the 20 mm Berezin aircraft cannon" issued on July 11 of that year. It was planned to conduct factory tests of two cannons by July 16, prepare three cannons for field tests by July 18, and by July 25, mount two wing cannons on the Il-2 and one motor cannon on the LaGG-3 for flight testing.''

''In the memoirs of the Deputy People's Commissar of Armaments, V. N. Novikov, it is claimed that the cannon only reached initial testing at the end of 1943. According to him, the main difficulties arose from modifying the bolt and the receiver. The problems were likely caused by the fact that the ShVAK cannon cartridge, unlike the UB machine gun cartridge, had a rim. Thanks to close collaboration with the factory designers, the cannon turned out not only to be very light (half the weight of the ShVAK) but also significantly more technologically advanced.''

== Media ==
{{Youtube-gallery|https://www.youtube.com/watch?v=7UHpIcQQonY&t=76s=Yak 3P is one of the aircraft armed with this gun|https://youtu.be/nrC6G4kSLBg?si=7OcYdvSjHZre7HUz=Yak-9P is one of the planes armed with this gun}}

== See also ==


;Related development

* [[B-20 (20 mm) (Family)]]

== External links ==
''Paste links to sources and external resources, such as:''

* ''topic on the official game forum;''
* ''other literature.''

{{USSR aircraft cannons}}
{{Italy aircraft cannons}}

[[Category:Aircraft cannons]]

War Thunder Wiki - User contributions [en]

ZIS-4 (57 mm)

B-20M (20 mm)