Abstract: This invention relates to a projectile having moving airfoils for guidance and to an actuator for moving the airfoils in order to provide a low cost actuator for use in small size projectiles.

Abstract: Information transmitting method using a laser beam projector which may form part of an optical missile guidance system on board a ship say. For missile guidance, the laser beam is so scanned over a field containing the target and missile that the missile receives successive glimpses of the beam at times dependent on guidance and other information to be sent to it. For transmitting information, to another ship say, the same beam projector is used to scan a field containing a detector on board the other ship so that the detector receives successive glimpses of the beam at times dependent on the information to be transmitted.

Abstract: A projectile assembly comprising a carrier and a projectile arranged for insertion in the unmodified breech of a gun, the carrier having a ramming piston which urges the projectile into the barrel of the gun ready for firing whereupon the carrier is ejected and replaced by a propellant cartridge for firing the projectile from the barrel. The assembly is suitable for use in a belt fed automatic gun in which projectile assemblies are alternately interspersed with propellant cartridges such that a projectile is placed in the gun barrel by the projectile carrier, the carrier is ejected and then the next item on the belt, a propellant cartridge is placed in the breech for firing the gun.