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France
HS.404

Showing the details of the shells used(where known)
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Weapon Details
HS.404
(Anti Aircraft)
Blank
photo of HS.404 from Wikipedia
History
This was a modified Oerlikon 20mm and was produced before World War 2 for the French army as an Anti Aircraft gun.
ManufacturerHispano-Suiza
Manufactured1935 - Present
Calibre20mm
LengthL/85
20x110RB
(HE High Explosive)
20mm 0.123Kg 830M/Sec ≈0.018Kg explosive
Maximum Range 1500 Mtr
Range(Mtr)1002004008001200160020002400
Flight Time(Secs) 0.13 0.27 0.61 1.61 3.69 9.84
Direct Fire
Range(Mtr)1002004008001200160020002400
Flight Time(Secs) 0.13 0.27 0.61 1.61 3.69 9.84
Hit Probability(%) 98 98 98 81 22 1
Blast/Fragmentation Effects
Burst radius Infantry in open 99% kill1 mtr Burst radius Infantry in open 66% kill2 mtr
Burst radius Infantry in open 33% kill7 mtr  Armour Penetration inc roof at 1 mtr0 mm
An explosion within 1 mtr of infantry in the open will cause 99% casualties - lethal.
An explosion within 2 mtr of infantry in the open will cause > 66% casualties and could damage some AFV's.
An explosion within 7 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.

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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