Abstract: The present disclosure relates to thermoplastic copolyamide particles for toughening and/or reducing microcracking in composite materials, wherein the particles have a given particle distribution.

Abstract: Air defense system capable of intercepting high-speed airborne missiles (3), including a fixed control installation (1) and defense missiles (2).According to the present invention:at the point (F) common to the approach trajectory (T) of the said airborne missile (3) and to the interception trajectory (t) of the said defense missile (2), the said interception trajectory is transversal to the approach trajectory;the central axis of the homing head of the defense missile (2) is inclined laterally with respect to the axis of the said defense missile (2); andthe said defense missile (2) is roll-stabilized, so that the said central axis of the said homing head is arranged on the side of the said airborne missile (3).

Abstract: The invention relates to a weapon system intended for the structural destruction of a target. According to the invention, this system comprises computing means which are mounted on board said missile and which, from the values of the velocity Ve of the missile and of the relative target-missile velocity V.sub.R, as well as from the angle D between the longitudinal axis of the missile and said relative velocity V.sub.R, calculate at an instant close to said instant of detection furnished by proximity detection means, a duration which is then counted down by said computer means from said instant of detection and at the end of which said computer means control said focussed charge.

Abstract: The invention relates to a reconnaissance system comprising an air-borne vehicle capable of moving above a territory to be surveyed by rotating about its longitudinal axis, and means for taking images disposed on board the vehicle to observe said territory by a helicoidal scanning in relation with the rotation of the vehicle, wherein the vehicle is of the self-propelled missile type and the sensitive members are formed by at least one linear assembly of photosensitive elements disposed parallel to the longitudinal axis of the missile to give at each line an image of an elementary strip of territory, which scans a strip of territory upon each revolution of the missile, the total image of the territory being formed by the plurality of images of the successive strips.