Description of impacts and penetrations1. Main Battle Tank T55 100mm armour piercing round (100 APCBC). Hit and penetration (4pcs). 2. Main Battle Tank T55 100mm armour piercing round (100 APCBC). Hit, no penetration due to small angle of impact. 3. Light recoilless rifle (55S55) of Finnish origin, Two hits and penetrations. Note the small penetration of the HEAT (High Explosive Antitank) jet in comparison to the kinetic ammunition (Armour Piercing, POS.1) Note also the residual penetration of the upper impact on the opposing turret wall. 4. And 10 several hits and penetrations of 57mm armour piercing rounds. The gun has been used as a double cannon installation in the anti aircraft tank SU-57-2. some rounds have inflicted a bigger penetration hole than the calibre due to the breaking of the armour. A small angle of impact has caused a ricochet in one case. 5. Typical impacts of different High Explosive Fragmentation shells. The lower one is a hit by a 57mm (HE) shell. The upper one is a hit by a 100mm (HE) shell, no penetration has occurred. The larger calibre hit has caused a breakage of the welding seams between the rear wall and roof armour of the turret. 6. Two hits by 57mm Armour Piercing ammunition, no penetration due to the armour thickness and small angle of impact. 7. Several hits by 100mm tank gun HEAT rounds. Note a much larger penetration hole in comparison to the recoilless rifle HEAT penetrations (Position 3 and 8), tracks left on the surface by the fragments and impact of the shells stabilizing wings. 8. two hits and penetrations by the recoilless rifle HEAT ammunition. Note the small penetration hole of the HEAT jet in comparison to the kinetic ammunition (Armour piercing POS.1). Note also the rear portion of the HEAT jet which after penetration has been left to the penetration hole and the fragmentation effect of the shell around the penetration hole. 9. Hit by the 100mm tank gun HEAT ammunition directly to the penetration hole left by the 100mm kinetic armour piercing round. Note the impact of the stabilizing wings of the shell around the impact hole.
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