Matching of operation of “base-head” composite shaped-charge stages

A composite shaped charge of a “base-head” type in which the charge located further from the target, in the base part of the projectile, operates first and forms a hole in the target is considered. After a certain time necessary for operation of the first shaped charge, the second shaped charge located in the head part of the projectile is initiated, which exerts a repeated action on the target (make the hole deeper).