Abstract: The present invention relates to threat protection, in particular a system and method providing active protection using at least one UAV, e.g., drone, to neutralize an incoming aerial or ground threat or diminish or prevent damage caused, directly or indirectly, from the incoming threat.

Abstract: A small-caliber projectile having a length Lb, a forward ogive-shaped section, a rear generally cylindrical shaped section, a core, and a jacket generally surrounding the core. The core has a front/penetrator core portion and a soft/heavy rear core portion, wherein the front/penetrator core portion is made of a tungsten alloy and has a length Lp and the soft/heavy rear core portion is made of a lead alloy and has a length Lr and the ratio Lp to Lb is in the range of 0.2 to 0.5.

Abstract: A delayed chaff cartridge for use as a decoy for RF radars may include a hollow longitudinal cartridge; one or more hollow capsules; and a propelling element configured to dispatch the capsule out from the hollow cartridge, wherein each hollow capsule includes: two longitudinal parts connected at second end via a pivot, and wherein, at least one of the two longitudinal parts is truncated at a first end.

Abstract: A pre-stressed curved plate comprising a curved plate having at least one concave surface, the curved plate being enveloped and adhesively bonded with tensioned reinforcing fibers, whereby the reinforcing fibers are first wound around the plate under tension being spaced apart from the concave surface and subsequently subjected to pressure to stretch and bond the reinforcing fibers to the surfaces of the plate, where upon bonding, the tensile strain of the fiber introduces stress in the plate.

Abstract: A pre-stressed curved plate comprising a curved plate having at least one concave surface, the curved plate being enveloped and adhesively bonded with tensioned reinforcing fibers, whereby the reinforcing fibers are first wound around the plate under tension being spaced apart from the concave surface and subsequently subjected to pressure to stretch and bond the reinforcing fibers to the surfaces of the plate, where upon bonding, the tensile strain of the fiber introduces stress in the plate.

Abstract: A GPS-aided inertial navigation method includes providing multiple sensors including multiple inertial measurement units (IMUs) and at least one global positioning system receivers and antennas (GPSs) and computer with embedded navigation software. The computer interfaces with all IMUs and all GPS receivers; running, in parallel, in multiple standard inertial navigation (IN) schemes; computes the mean of all the INSs to obtain a fused IN solution for the IMUs' mean location; computes the mean of all the GPS solutions to obtain a fused GPS solution for the GPS antennas' mean location; applies a lever-arm correction, with the vector from the mean IMU location to the ‘mean antenna’ location, to the fused GPS solution; feeds the fused IN solution and the lever-arm corrected fused GPS solution to a single navigation filter, as if there were a single IMU and a single GPS; and runs an IMU/IN/GPS correction module.

Abstract: A light weight pre-stressed antiballistic article including a monolith ceramic plate/tile bonded to a thin lightweight thermal expansion material with an adhesive, characterized, in that the thermal expansion material has a thermal expansion coefficient at least 50% higher than the ceramic plate/tile, and the thermal expansion material is bonded to either the front face, back face or both faces of the ceramic plate/tile at a bonding temperature of between 50° C. and 250° C. with adhesive and subsequently cooled, whereby upon cooling, the bonded thermal expansion material contracts to a greater extent than the ceramic plate/tile, exerting compression stress on the ceramic plate/tile.