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Italy - Cannone contracarro da 47/32 M39 L/32

Showing the details of the shells used(where known)
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Weapon Details
Flag
Cannone contracarro da 47/32 M39 L/32
(Machine Gun)
Blank
photo of Cannone contracarro da 47/32 M39 L/32 from Wikipedia
History
This was the Austrian 4.7cm Bohler L/39 manufactured under licence, and was used in all theatres till Italy surrendered.
Manufactured1939 - 1943
Calibre47mm
LengthL/32
 
47 x 195/227 mm R L/32(AP)
47mm 1.6Kg 630M/Sec
Quoted Penetration 58mm @ 100mtr/30° ( ≈ 66mm/0°)
Range(Mtr)1002004008001200160020002400
Flight Time(Secs) 0.16 0.33 0.69 1.53 2.56 3.86 5.53 7.79
Penetration(mm@30°) 54 50 44 37 30 24 19 14
Penetration(mm@0°) 63 58 51 43 35 28 22 17
Hit Probability(%) 98 98 98 85 44 22 3 2



Bohler HE(HE)
47mm 2.37Kg 250M/Sec ≈0.356Kg explosive
Maximum Range 7000 Mtr
Range(Mtr)10002000300040005000600070008000
Flight Time(Secs) 5.09 13.94 33.22 107.73
Burst radius Infantry in open 99% kill3 mtr Burst radius Infantry in open 66% kill6 mtr
Burst radius Infantry in open 33% kill15 mtr  Armour Penetration inc roof at 1 mtr1 mm
An explosion within 3 mtr of infantry in the open will cause 99% casualties - lethal.
An explosion within 6 mtr of infantry in the open will cause > 66% casualties and could damage some AFV's.
An explosion within 15 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 penetrate 1 mm of the tank armour including the roof.


 
Bohler HEAT(HEAT)
47mm 2.37Kg 250M/Sec
Quoted Penetration 55mm @ 0mtr/0° ( ≈ 55mm/0°)
Range(Mtr)1002004008001200160020002400
Flight Time(Secs) 0.41 0.84 1.75 3.86 6.45 9.72
Penetration(mm@30°) 55 55 55 55 55 55
Penetration(mm@0°) 55 55 55 55 55 55
Hit Probability(%) 98 98 77 22 3 1

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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