Abstract: A process that uses a lodged projectile removal charge (LPRC) apparatus to remove a projectile jammed in a cannon's gun tube. The LPRC is positioned coaxially and offset from the projectile, and the gun tube is filled with water. The charge is detonated producing a shock wave that disintegrates the LPRC apparatus and pressurizes the water. The pressurized water produces a radial hydraulic force against an interior wall of the gun tube, an axial hydraulic force against the projectile pushing the projectile toward the chamber, and produces an opposing expansion of explosive gases that blasts out most of the water in the gun tube. The process is less likely to damage the gun tube. The LPRC may be made using a 3D printer.

Abstract: A dearmer positioning system has two assemblies, each of which circumscribes a dearmer's barrel. Each of the two assemblies includes two half rings and a one-piece outer ring. The two half rings are joined to one another to define a full ring having a first central opening defining a first diameter. The full ring has a periphery defining a second diameter. The one-piece outer ring has a second central opening defining a third diameter, and a periphery defining a fourth diameter. The third diameter is greater than the second diameter such that the full ring slidingly fits in the central opening of the outer ring. Threaded fasteners engage the outer ring and extend radially through the outer ring and into its central opening to engage the periphery of the full ring.

Abstract: A modular shaped charge system including a housing including a circular opening; an attachment ring having a diameter complementary to a diameter of the opening of the housing. The attachment ring configured to snap fit into the opening of the housing. A liner including a cone shape with a base diameter complementary to the diameter of the attachment ring. The liner is configured to snap fit into the attachment ring. The apex of the liner is positioned inside the housing. An air gap cover including a cone shape with a base diameter complementary to the diameter of the attachment ring. The air gap cover is configured to thread into the attachment ring, and the apex of the air gap cover is positioned outside the housing.