The present invention discloses a bullet with a negative Poisson's ratio effect and a method of designing thereof. The bullet includes a cylindrical section of the bullet having a negative Poisson's ratio design, and a conical tail of the bullet and a tip of the bullet each with a matching design; the cylindrical section of the bullet is a tubular structure having periodically alternating transverse and vertical holes; the tubular structure includes a plurality of holes, with a center axis of one hole being axially perpendicular to a center axis of another adjacent hole, that is, the axis of each hole being structurally orthogonal to an adjacent hole; and the holes in rows and columns are periodically arranged into the tubular structure, which is a tubular structure having the negative Poisson's ratio effect.

The present invention discloses a bullet with a negative Poisson's ratio effect and a method of designing thereof. The bullet includes a cylindrical section of the bullet having a negative Poisson's ratio design, and a conical tail of the bullet and a tip of the bullet each with a matching design; the cylindrical section of the bullet is a tubular structure having periodically alternating transverse and vertical holes; the tubular structure includes a plurality of holes, with a center axis of one hole being axially perpendicular to a center axis of another adjacent hole, that is, the axis of each hole being structurally orthogonal to an adjacent hole; and the holes in rows and columns are periodically arranged into the tubular structure, which is a tubular structure having the negative Poisson's ratio effect.

Methods, systems, and devices solving Euler’s rotational rigid body equation of motion, formed within two non-inertial frames of reference, that determine the vector inconstant variables of angular acceleration, velocity, and trajectory using a single piezoresistive accelerometer sensor, an AC coupling algorithm and 1.sup.st and 2.sup.nd running integrals to in-flight acquire rotational inconstants in high-density Terramedia Terraflight and determine a Penetrator’s loading profiles and method to parse vector Terraflight for rotational Pitch and Yaw enabling precision trajectory tracking utilizing three axial facing piezoresistive accelerometers, a differencing algorithm and 1.sup.st and 2.sup.nd running integrals enabling Penetrator flight control and precision guidance.

A projectile for piercing armor includes an outer jacket built around a penetrator assembly. The penetrator assembly includes an inner jacket, a penetrator, and an incendiary charge. The inner jacket includes a leading part and a trailing part. The incendiary charge is carried by the leading part of the inner jacket. The penetrator is made of an armor-piercing material and includes an armor-piercing leading extremity, a trailing extremity, and an outer surface. The armor-piercing leading extremity extends into the trailing part of the inner jacket, and the inner jacket bears against the outer surface of the penetrator between the armor-piercing leading extremity and the trailing extremity. An empty space within the inner jacket is between the armor-piercing leading extremity of the penetrator and the incendiary charge.

A projectile for piercing armor includes an outer jacket built around a penetrator assembly. The penetrator assembly includes an inner jacket, a penetrator, and an incendiary charge. The inner jacket includes a leading part and a trailing part. The incendiary charge is carried by the leading part of the inner jacket. The penetrator is made of an armor-piercing material and includes an armor-piercing leading extremity, a trailing extremity, and an outer surface. The armor-piercing leading extremity extends into the trailing part of the inner jacket, and the inner jacket bears against the outer surface of the penetrator between the armor-piercing leading extremity and the trailing extremity. An empty space within the inner jacket is between the armor-piercing leading extremity of the penetrator and the incendiary charge.

A method is disclosed for modifying pre-existing ammunition projectile (10) which includes a hard metal inner core (11). The projectile is secured and a drill is applied to the tip end (17) of the projectile so as to create a bore (20) extending into the core. An insert (22) is then coupled to the projectile. The insert may include a shaft portion (23) which extends into the core channel and a tip portion (25). The insert is made of a non-hard metal or soft material.

An existing munition may be modified, using a modification kit, to provide enhanced fragmentation effects. The munition may be enclosed in an airframe, which also contains preformed fragments, and one or more adapters may be used to provide connections through the airframe. The adapters may be used to substitute for types of connectors already on the existing munition. The adapters may include one or more of an adapter for coupling a tail kit to a tail of the munition, an adapter for coupling a nose kit to a nose of the munition, and an adapter for coupling lugs to the munition. The adapters may engage couplers on the munition, and/or may engage the airframe. The modification of the existing munition may transform the existing munition into a fragmentation weapon, for example usable for height-of-burst detonation to spread fragments over a large area.

The present invention relates to a bullet. More particularly, the present invention relates to a bullet including concentric and sequentially ordered cylindrical fore, intermediate and aft portions. The aft portion comprises a cross-sectional diameter about equal to the diameter measured across the rifle landings of the riffled barrel operatively to create a gas pressure build up there-behind while the rifling grooves and lands deform and/or cut the aft portion thereby to impart spin to the bullet about the central axial axis thereof. The intermediate portion comprises a cross-sectional diameter smaller than that of the aft portion, which acts as a bearing surface for operatively riding along the rifling lands thereby to inhibit yawing of the bullet while operatively travelling through the rifled barrel. The fore portion comprises a cross-sectional diameter smaller than that of the intermediate portion with an annular stamping surface, for operatively providing a clean cut circular hunting wound, located at or near an interface between the fore and intermediate portions.

The present invention provides a treated projectile having a reduced friction compared to an untreated projectile comprising: a projectile comprising a higher atomic concentration of Ca and a reduced friction in the treated projectile than a comparable untreated projectile.

A lightweight energetic weapons pod 2 that integrates to unmanned aerial systems 1 that enables the operator the ability to engage targets without flight degradation. The device utilizes an energetic weapons pod 2 that may be reloaded to support sustained combat operations. The ability of the device to function as intended is based on explosive mitigation compression zones and recoilless configurations that allow drone survivability during detonation events.