In the current game, the MP ACRA missiles fired from the 142mm gun launcher equipped on the AMX-10M and AMX-30 ACRA have a penetration capacity of 700mm against vertical armour.
However, the French military’s technical data states that it has a penetration of 380mm at an angle of incidence of 65°, which means that it has a penetration of 900mm when converted to vertical armor.
For this problem, you need to know the calculation process. The greater the angle of inclination of sloped armor, the thicker the effective armor thickness becomes, which can be calculated by multiplying the original armor thickness by secθ.
For example, if 100mm of armor is inclined at a 30° angle, and θ = 30°, then secθ ≒ 1.15, meaning that the effective armor thickness is 1.15 times greater, or 115mm.
If 100mm of armor is inclined at a 45° angle, secθ ≒ 1.41, and if it is inclined at 60°, then secθ = 2.
However, this formula only works for HEAT rounds, and kinetic energy rounds do not work this way.
This document states that it will penetrate 380mm of armor angled at 65°. In this case, secθ≒2.366, which is 380mm x 2.366 = 899.08mm ≒ 900mm.
As shown in the structural diagram, the liner cone angle is 60°, and a penetration force of 900mm may seem excessive at first glance, but considering that the diameter of the warhead’s copper liner cone is 128mm and the standoff distance is about 1.5 calibers, 900mm of penetration is actually about 7 calibers of the liner diameter.
Generally, with shaped charges, the optimal standoff distance is 1 to 3 calibers, and considering that penetration is 5 to 8 calibers, this is considered reasonable rather than excessive.
If the MP ACRA’s penetration is increased to 900mm, it will be able to counter superior enemy vehicles equipped with ERA or composite armor.
- Yes
- No
- Further consideration is needed
If anyone thinks this proposal is good, please feel free to pass it on to the implementation proposal moderator.