Difference between revisions of "B-20M (20 mm)"
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== Description == | == Description == | ||
| − | + | The 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. The B-20M designation denotes a B-20 configuration that is mounted to fire through the propeller shaft. | |
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=== Vehicles equipped with this weapon === | === Vehicles equipped with this weapon === | ||
<!-- ''List out vehicles that are equipped with the weapon.'' --> | <!-- ''List out vehicles that are equipped with the weapon.'' --> | ||
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== General info == | == General info == | ||
| − | + | The gun has 6 ammunition options. Use them depending on the situation and needs on the battlefield | |
=== Available ammunition === | === Available ammunition === | ||
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== Usage in battles == | == Usage in battles == | ||
| − | + | This gun is designed for combat with enemy aircraft. Therefore, your main goal is to shoot down enemy planes, which the guns can successfully deal with. But you can also destroy open or lightly armored vehicles with the right ammunition. | |
=== Pros and cons === | === Pros and cons === | ||
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* Decent rate of fire | * Decent rate of fire | ||
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'''Cons:''' | '''Cons:''' | ||
| − | * AP-I ammunition can pen only | + | * AP-I ammunition can pen only 28 mm of armor at 10 m so not useful against decently armored vehicles. |
| − | * Usually the gun has about 115-120 shots, which is often not enough. | + | * Usually the gun has about 115-120 shots, which is often not enough for prolonged battles. |
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== History == | == 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 == | == Media == | ||
| − | + | ''Excellent additions to the article would be video guides, screenshots from the game, and photos.'' | |
== See also == | == See also == | ||
Latest revision as of 05:28, 28 August 2024
| This page is about the Soviet cannon B-20M (20 mm). For other versions, see B-20 (20 mm) (Family). |
Contents
Description
The 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. The B-20M designation denotes a B-20 configuration that is mounted to fire through the propeller shaft.
Vehicles equipped with this weapon
General info
The gun has 6 ammunition options. Use them depending on the situation and needs on the battlefield
Available ammunition
- Default: FI-T · AP-I
- Universal: FI-T · HEF · AP-I · FI-T
- Ground targets: HEF · FI-T · AP-I
- Tracers: FI-T · FI-T · FI-T
- Armoured targets: AP-I · FI-T · AP-I · AP-I
- Stealth: AP-I · HEF · HEF · FI
| Penetration statistics | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Ammunition | Type of warhead |
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 | ||
| Shell details | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Ammunition | Type of warhead |
Velocity (m/s) |
Projectile mass (kg) |
Fuse delay (m) |
Fuse sensitivity (mm) |
Explosive mass (TNT equivalent) (g) |
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
This gun is designed for combat with enemy aircraft. Therefore, your main goal is to shoot down enemy planes, which the guns can successfully deal with. But you can also destroy open or lightly armored vehicles with the right ammunition.
Pros and cons
Pros:
- Decent rate of fire
Cons:
- AP-I ammunition can pen only 28 mm of armor at 10 m so not useful against decently armored vehicles.
- Usually the gun has about 115-120 shots, which is often not enough for prolonged battles.
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
Excellent additions to the article would be video guides, screenshots from the game, and photos.
See also
- Related development
External links
Paste links to sources and external resources, such as:
- topic on the official game forum;
- other literature.
| USSR aircraft cannons | |
|---|---|
| 20 mm | B-20E · B-20M · B-20S · ShVAK |
| 23 mm | GSh-6-23M · GSh-23L · NR-23 · NS-23 · NS-23K · PTB-23 · VYa-23 |
| 30 mm | 2A42 · GSh-6-30 · GSh-30-1 · GSh-30-2 · GSh-30-2K · NR-30 |
| 37 mm | N-37 · N-37D · NS-37 · SH-37 |
| 45 mm | NS-45 |
| Foreign: | |
| 20 mm | Hispano Mk.II (Britain) · MG 151 (Germany) |
| 37 mm | M4 (USA) · M10 (USA) |
| Italy aircraft cannons | |
|---|---|
| 20 mm | TM197B |
| 30 mm | Hispano HS 825 |
| 37 mm | Breda Model 39 37/54 |
| 102 mm | 102/35 mod 14 |
| Foreign: | |
| 20 mm | B-20E (USSR) · B-20M (USSR) · B-20S (USSR) · Hispano 404 (France) · Hispano Mk.II (Britain) · Hispano Mk.V (Britain) · M24A1 (USA) · M61A1 (USA) · MG 151 (Germany) · MG FF (Germany) · MG FF/M (Germany) · ShVAK (USSR) |
| 23 mm | GSh-23L (USSR) · NR-23 (USSR) · NS-23 (USSR) |
| 27 mm | Akan m/85 (Sweden) · Mauser BK27 (Germany) |
| 30 mm | DEFA 552 (France) · GSh-30-1 (USSR) · GSh-30-2K (USSR) · MK 103 (Germany) · MK 108 (Germany) · NR-30 (USSR) |
| 37 mm | BK 3.7 (Germany) · N-37 (USSR) · N-37D (USSR) |
