A compressive structural element including: an enclosure having a top, a bottom, and inner wall and an outer wall, a first cavity defined between the inner and outer walls and a second cavity defined by the inner wall; and a non-compressible material disposed in the first cavity; wherein the outer wall has at least a portion thereof inwardly shaped toward the first cavity and the inner wall has at least a portion outwardly shaped towards the first cavity such that a first compressive force acting on the top and/or bottom tending to compress the element by a first deflection causes an amplified second deflection, relative to the first deflection, of the inner and/or outer walls into the non-compressible material, thereby exerting a second compressive force against the non-compressible material, resulting in a resistance to the first deflection and the first compressive force tending to compress the element.

Device for producing focused explosions, comprises a rigid outer shell, an explosive filling, the explosive filling comprising a plurality of inwardly extending hollows; and a gap defined between the explosive filling and the rigid outer shell.

Embodiments include engagement management systems and methods for managing engagement with aerial threats. Such systems include radar modules and detect aerial threats within a threat range of a base location. The systems also track intercept vehicles and control flight paths and detonation capabilities of the intercept vehicles. The systems are capable of communication between multiple engagement management systems and coordinated control of multiple intercept vehicles.

A compressive structural element including: an enclosure having a top, a bottom, and inner wall and an outer wall, a first cavity defined between the inner and outer walls and a second cavity defined by the inner wall; and a non-compressible material disposed in the first cavity; wherein the outer wall has at least a portion thereof inwardly shaped toward the first cavity and the inner wall has at least a portion outwardly shaped towards the first cavity such that a first compressive force acting on the top and/or bottom tending to compress the element by a first deflection causes an amplified second deflection, relative to the first deflection, of the inner and/or outer walls into the non-compressible material, thereby exerting a second compressive force against the non-compressible material, resulting in a resistance to the first deflection and the first compressive force tending to compress the element.

A warhead having a circumference, a radial direction and a longitudinal direction and comprising radially extending trapezoids. Each trapezoid having a length into said longitudinal direction and a plurality of said trapezoids extending around said circumference.

A warhead comprises an outer shell of explosive surrounding an inner core of fragmentation material.

A battlefield weapon system is proposed to counter the threat posed by small drones. The system uses a standard .50 caliber machine gun firing explosive rounds, to create a flak bombardment to bring down the drone. A control system causes the round to fragment as it approaches the range of the target. The direction in which the round is fired is controlled manually by the gunner. The system is fully portable for dispersed deployment among infantry.