Abstract: A spin-stabilized projectile the trajectory of which can be improved to increase accuracy with the projectile being controlled by a source of electromagnetic radiation providing pulses carrying encoded information. The projectile includes a nose end and a midportion having a periphery disposed about which are a plurality of spaced masses with a high explosive charge associated with each mass for high explosive detonation acceleration of its corresponding mass to provide an impulse to the projectile. A projectile has a boattail defining a cavity opened at the rear end of the boattail. Received in the cavity is a pulsed electromagnetic radiation receiver and processor.

Abstract: A spin-stabilized projectile the trajectory of which can be improved to increase accuracy with the projectile being controlled by a source of electromagnetic radiation providing pulses carrying encoded information. The projectile includes a nose end and a midportion having a periphery disposed about which are a plurality of spaced masses with a high explosive charge associated with each mass for high explosive detonation acceleration of its corresponding mass to provide an impulse to the projectile. A projectile has a boatail defining a cavity opened at the rear end of the boatail. Received in the cavity is a pulsed electromagnetic radiation receiver and processor.

Abstract: A high-speed penetrating metallic jet is produced using a projectile accelerated by a compressed gas or chemical propellant charge as the source of momentum and energy. The propellant charge and projectile are positioned within a tubular bore such as a gun barrel upstream from a discharge end. A metallic disc is releasably maintained in transverse relation within the bore between the projectile and discharge end. The projectile has a concave contoured impact plate of high density operative to strike the metallic disc upon ignition of the propellant so as to accelerate the disc outwardly from the discharge end while simultaneously causing the disc to collapse radially inwardly toward the barrel axis and create an elongated metallic jet. The invention finds particular application in the penetration of geological strata, concrete, steel, water and many other materials used in fabrication and construction whenever penetrations or perforations are desired.