Shaped charge with enhanced penetration

A shaped explosive charge enhancement and stand-off structure in which the shaped charge has a cone on the order of about 60.degree., comprising in combination with a housing for the explosive having the cone lined.

• (a) a frusto-conical rigid structure having its small end about two-thirds of the diameter of the base of the cone and perpendicular to the longitudinal axis of the cone, and its larger end about the same area as the base of the cone and perpendicular to the longitudinal axis of the cone and arranged to register with the base of the cone,
• (b) the longitudinal axis of the frusto-conical structural being coincidental with the longitudinal axis passing through the cone,
• (c) the inside wall of said frusto-conical structure being smooth in a longitudinal direction, so as to provide an unhindered path for gases travelling longitudinally along the wall,
• (d) means for securing said structure to the shaped charge, and
• (e) the inner wall of said structure converging from its large to its small end at a closing angle ranging about 11.5.degree.-14.degree. at 1.5 cone diameters stand-off to a closing angle of about 30.degree. at from about 0.575 to about 0.7 diameters stand-off and arranged so that no portion of a generated jet particulates contacts the inner wall, and the velocity of the generated jet is increased to produce substantially increased penetration in a target material.

A shaped explosive charge enhancement and stand-off structure in which the shaped charge has a cone on the order of about 60.degree., comprising in combination with a housing for the explosive having the cone lined.

• (a) a frusto-conical rigid structural having its small end about two-thirds of the diameter of the base of the cone and perpendicular to the longitudinal axis of the cone, and its larger end about the same area as the base of the cone and perpendicular to the longitudinal axis of the cone and arranged to register with the base of the cone,
• (b) the longitudinal axis of the frusto-conical structural being coincidental with the longitudinal axis passing through the cone,
• (c) the inside wall of said frusto-conical structure being smooth in a longitudinal direction, so as to provide an unhindered path for gases travelling longitudinally along the wall,
• (d) means for securing said structure to the shaped charge, and
• (e) the inner wall of said structure converging from its large to its small end at a closing angle of 19.degree. at 1.0 cone diameters stand-off and arranged so that no portion of a generated jet particulates contacts the inner wall, and the velocity of the generated jet is increased to produce substantially increased penetration in a target material.