is damaged, thereby preventing detonation entirely. As shaped charges rely on very specific structure to create a jet of hot metal, any disruption to this structure greatly reduces the effectiveness of the warhead. Slat armour can be defeated by tandem-charge designs such as the RPG-27 and RPG-29. Electric armour Electric 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. See also Active protection system Armoured fighting vehicle Armoured forces Main battle tank Non-military armoured vehicles Personal armour Plastic armour References External links Electrically charged armour Modern armoured vehicles Armoured warfare History of the tank