Reverse initiation device

Abstract

A shaped charge explosive device for defeat of advanced armor is presented. In operation, a conically capped hemispherical liner is collapsed in reverse sequence. Detonation of the base of the hemisphere, done earlier in sequence, produces a thick massive jet for initial penetration as a deep crater, in the armor. The conical liner is collapsed afterward, producing a thin jet which reaches the armor deep into the crater earlier produced, at an increased distance than would be usual without a crater. The increased standoff is a further contribution in destructive improvement since adding travel distance to the target for a destructive jet, up to a point, will increase destruction of the target. Various detonation mechanisms, inhibitors, and judicious use of various high explosives and detonation arrangements, all provide the tools for formation of a desired particular two-jet sequence, to accomplish a desired destructive potential. It is further taught that any conventional liner might be jetted in this reverse sense which could reduce the weight of the needed explosive, and the explosive head height, to do the same damage. The method taught here could also tend to avoid the necessity of electronic communication e.g., wires between the front of the charge and the rear of the charge which may destroy the symmetry of the device.