Electrically charged armour is a recent development in the United Kingdom by the Defence Science and Technology Laboratory .        A vehicle is fitted with two thin shells, separated by insulating material. The outer shell holds an enormous electric charge , while the inner shell is at ground. If an incoming HEAT jet penetrates the outer shell and forms a bridge between the shells, the electrical energy discharges through the jet, disrupting it. Trials have so far been extremely promising, and it is hoped that improved systems could protect against KE penetrators. The developers of the Future Rapid Effect System (FRES) series of armoured vehicles are considering this technology. [ citation needed ]
Whereas the material of normal armour is always a compromise between hardness and ductility, spaced armour can also comprise plates with different material properties to increase its effectiveness against kinetic energy penetrators. An example for this construction is the armour of the Leopard 2 tank, which provides a slanted first armour stage (disturber), a specially hardened second stage (disrupter) and a softer third stage with high ductility (absorber). The disturber is to ideally deflect or at least manipulate the direction of incoming kinetic energy penetrators, which are then shattered and fragmented when hitting the disrupter. The absorber stage finally erodes and contains spalls and fragments.
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