Perforation of Finite Targets
Penetration in Semi-Infinite Targets
Penetration and Perforation Calculations
Max. Perforation with a Given Gun SystemWith a real gun/ammunition system the target velocity optimization is of secondary importance. A well chosen combination of penetrator length and diameter is relevant. The 120mm smooth bore L44 gun is a good example for showing this. On the basis of â€ž120mm Tungsten Penetrator Designâ€œ â€“ see under downloads â€“ the accelerated masses and the corresponding muzzle velocities were calculated for a lot of feasible penetrator geometries. The perforation equation provided the perforation lengths at a single plate target with a hardness of BHN235 under an obliquity of 60Â°. The diameter along the penetrator length was supposed as shown in the following graph.
700mm -> 8.9 kg and 900mm -> 8.1 kg (linear interpolation for other penetrator lengths)
The following graph shows the perforation results at the muzzle.
The following graph shows the perforations of penetrators with L over D equal 32, different lengths and ranges from muzzle to 3 km. If we donâ€™t include the perforation at muzzle then a penetrator length of 700 mm gives the best overall performance.