Logo from Scott Cunningham.
Logo from Scott Cunningham.
rmour hardness and quality is vitally important when comparing the penetration ability of different weapons and often seems to be overlooked. Many different measurement techniques have been developed for armour hardness and the more common ones will be explained in this article.
To show why it is so important one example will be given. The Italian Breda 20mm gun had about the same penetration capability as the German 20mm Flak guns. However the tabulated data shows the Italian gun to have a penetration of 28mm at 500m range against a 0° target plate, whereas the German gun has a penetration of only 14mm under the same conditions. Other ranges show similar discrepancies. The reason is because the German gun was tested against a relatively hard armour plate with a BHN of 435 to 465, whereas the Italian gun was tested against an armour plate with a BHN of only 210 to 245.1
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