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Union Soviet Socialist Republics
20mm ShVAK automatic cannon

Showing the details of the shells used(where known)
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Weapon Details
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20mm ShVAK automatic cannon Blank
History
Designed as an aircraft cannon was installed on the T-38 and T-60 light tanks
Calibre20mm
LengthL/62
 
20mm AP
(AP Armor Piercing)
20mm 0.099Kg 750M/Sec
Range(Mtr)1002004008001200160020002400
Flight Time(Secs) 0.14 0.3 0.67
Penetration(mm@30°) 10 8 6
Penetration(mm@0°) 12 10 7
Hit Probability(%) 98 98 98



20mm HE
(HE High Explosive)
20mm 0.096Kg 770M/Sec 0.007Kg explosive
Range(Mtr)10002000300040005000600070008000
Flight Time(Secs)
Direct Fire
Range(Mtr)1002004008001200160020002400
Flight Time(Secs) 0.14 0.29 0.65 1.75 3.97
Hit Probability(%) 98 98 98 77 22 0
Blast/Fragmentation Effects
Burst radius Infantry in open 99% kill0 mtr Burst radius Infantry in open 66% kill0 mtr
Burst radius Infantry in open 33% kill1 mtr  Armour Penetration inc roof at 1 mtr0 mm
An explosion within 0 mtr of infantry in the open will cause > 66% casualties and could damage some AFV's.
An explosion within 1 mtr of infantry in the open will cause 33% casualties.
The blast effect of this shell exploding within 1 mtr of an armoured vehicle will not cause any significant armour damage.

Vehicles in our database using this gun
Vehicle NameCommon Name
 T-40A Amphibious  
 T-40S 
 T-60 / T-60A 
 

Hit probability is based on a static 2 x 2.4 metre panel at 0 degrees(vertical) at the range specified.

The data that has been used to create these records has come from Wikipedia, The Lone Sentry, The Bundes Archive and numerous books and websites that have provided the detailed information that has not been available anywhere else. The information we use to calculate the penetration tables, flight times and the hit probability comes from the Gun Calibre, the Shell Mass(Kg) and the muzzle velocity, plus range reductions to allow for gravity and wind resistance. This calculation originally came from a pre-war Krupp calculation which has been modified, and seems to fit the actual test results.

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