Cartridge ammunition (10) including a projectile (12) and a cartridge case (14). The cartridge includes a primer chamber (26) located adjacent a base wall (24) for holding a primer (28), a high pressure chamber (30) for holding a propellant charge (32), an intermediate pressure chamber (34) which surrounds the high pressure chamber, for receiving expanding propellant gases from the high pressure chamber and a low pressure chamber (36) at a rear end of the projectile for receiving expanding propellant gases from the intermediate pressure chamber. The pressure chambers are delimited by walls defining venting hole through which expanding gases can flow. The three pressure chambers provide for controlled release of gas pressure resulting in attenuation of peak gas pressures within the cartridge.

Techniques and architecture are disclosed for a nose insert for use in a projectile. The nose insert includes a polymer nose element and a metal cap. The polymer nose element includes a rear shank portion and a tapered head portion. Disposed onto the tapered head portion of the polymer nose is the metal cap. The metal includes an outer curved portion that terminates at a forward end in a meplat. In some embodiments, the metal cap prevents deformation of the polymer nose element caused by high stagnation temperatures experienced by the projectile during flight. In some other embodiments, the metal cap includes a locking ridge. The locking ridge is disposed on an inner surface of the metal cap component and interfaces with an outer surface of the tapered head portion of the polymer nose element.

Techniques and devices are disclosed for a nose insert and a projectile that include a polymer nose element and a metal tip. The polymer nose element includes a tapered head portion and a first shank portion attached to the tapered head portion. The tapered head portion includes a cavity disposed therein. The first shank portion includes a first diameter smaller than a width of the tapered head portion adjacent to the first shank portion. The metal tip disposed in the tapered head portion of the polymer nose element and includes a tapered end and a second shank portion attached to the tapered end. The second shank portion having a second diameter smaller than a width of the tapered end adjacent to the second shank portion. The second shank portion being received in the cavity within the tapered head portion of the polymer nose element.

A system for communicating with a projectile in flight toward an intended target includes a barrel-launched projectile and a remote receiver. The barrel-launched projectile includes an ordnance portion, an active communications apparatus and an onboard speed control. The active communications apparatus includes an onboard receiver, an electromagnetic wave reception device, and an active transmitter. The electromagnetic wave reception device includes at least one from the group consisting of an antenna and a photo receptor and is configured to receive an electromagnetic signal. The electromagnetic wave reception device is connected to provide a signal derived from the electromagnetic signal to the onboard receiver to deploy the onboard speed control. The active transmitter is connected and configured for transmitting a signal to the remote receiver during flight and before activation of the speed control. The transmitted signal is directed within a cone angle extending in a direction opposite of the barrel-launched projectile's flight direction. The onboard speed control includes a shaped explosive charge. Deploying the onboard speed control initiates explosion of the shaped explosive charge. The explosion of the shaped explosive charge adjusts velocity of the barrel-launched projectile.

A projectile has a liner forming an interior void, and a core disposed in a first region of the void proximal to a trailing end portion of the liner, with a portion of the void disposed forward with respect to the core. An outer jacket covers a leading end portion of the liner to enclose the interior void. When the projectile impacts a target object, the core travels in a direction of flight through the leading end portion of the liner to impact the object. When the projectile impacts a target surface at a non-zero angle of approach with respect to the normal of the target surface, the projectile creates a deformation in the target surface immediately before the core travels through the leading end portion of the liner to impact the target. This deformation reduces the probability that the core will ricochet off the deformed portion of the surface.

Embodiments of a projectile are disclosed herein. According to various embodiments, a projectile includes a substantially solid core of a material, and two or more petals attached to the core. The two or more petals can be formed from the same material used to form the core and can include a trocar tip. A cavity can be bound by the core and inner surfaces of the plurality of petals.

A disposable airdropped glider. The glider body is constructed from precut panels cut from (MDO) or (HDO) plywood and assembled with pocket-screw joinery or piano hinges. A skid board forms a landing surface and a cargo deck roll-off surface. The glider has pivoting wings and struts. The glider has a triple-tail, a flat nose and honeycomb paperboard panels between the nose and the cargo. Wings are pivoted from a position overlying the fuselage to a flying position by gas springs in wing spars which are compressed by a chain attached to the fuselage through a rotating bracket such that the gas springs are compressed when the wings are folded. The airfoils are plastic extrusions with openings that hold the wing spars and co-formed jury spars which attach the upper and lower surface of the wing. A parachute uses a part of the tail structure to form a deployment drogue.

Embodiments of the invention include an elongate rifle bullet with a plurality of circumferential grooves having overmolded polymer therein defining embedded polymer rings. Embodiments of the invention include cartridges with propellant and such bullets. In one or more embodiments, the bullet has a body portion and a converging nose portion. The polymer rings have an outer surface that is flush with, that is, conforming to the outer surface of the body. The polymer may have be selected to have a favorable coefficient of friction with respect to the barrel. A feature and advantage of embodiments is that the metal to metal contact between the bullet and the barrel is reduced while not diminishing the ballistic coefficient of the bullet.

The present invention relates to warheads with blast wave conditioners and in particular to devices for quickly removing a door to permit entry through the doorway. It discloses a device and method of shaping the pressure wave pattern by the use of inert material. The inert material of the present invention is used to reduce localized directional effects occurring at the point of impact, instead generating a more diffuse pressure-wave pattern across the target surface.

The invention relates to a projectile (5) with a frangible material, for short-range ammunition. To prevent any significant losses of precision and prevent the internal ballistic loading from being so great that it leads to the destruction of the projectile, it is suggested according to the invention that the projectile (5) consists of a shell (4) made of brass, the shell (4) has, seen in the direction of flight, a front cylindrical receiving space (4a) and a rear cylindrical receiving space (4b), the two receiving spaces (4a, 4b) are arranged coaxially with the longitudinal axis (15) of the projectile and are separated from each other by a partition wall (16), the partition wall (16) forms the floor (18) of the front receiving space (4a), and a core (1) of a frangible material is inserted in the front receiving space (4a), the tip (17) of the core (1) protrudes out of the front receiving space (4a), and at least one predetermined breaking point (2), running around the circumference of the shell (4), is formed in the shell (4) in the region of the partition wall (16).