B-20S (20 mm)

This page is about the Soviet cannon B-20S (20 mm). For other versions, see B-20 (20 mm) (Family).

Description

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Vehicles equipped with this weapon

• La-7B-20
• Yak-3 (VK-107)
• Yak-3P
• Yak-3T
• Yak-3U
• Yak-9P
• ◔Yak-9P
• Yak-9UT

General info

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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

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Usage in battles

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Pros and cons

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Pros: High rate of fire, High shell damage,

Cons: Usually low ammunition store (100-250 rounds),

History

The B-20 was created by Mikhail Yevgenyevich Berezin in 1944 by converting his 12.7 mm Berezin UB machine gun to use the 20 mm rounds used by the ShVAK cannon. No other changes were made to the weapon which was pneumatically or mechanically charged and was available in both synchronized and unsynchronized versions. In 1946, an electrically-fired version was created for the turrets of the Tupolev Tu-4 bomber until the Nudelman-Rikhter NR-23 cannon became available. The B-20 was a welcome replacement for the ShVAK because it was significantly lighter - 25 kg (55 lb) to the 40 kg (80 lb) ShVAK - without sacrificing rate of fire or muzzle velocity.

Media

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See also

Related development

• B-20 (20 mm) (Family)

External links

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• topic on the official game forum;
• other literature.