Firing trails on British Chobham armour 1979

A Chieftain tank and prepared static shaped charges are used to try and defeat a solid steel armour plate followed by a plate of the new Chobham armour. Attacks include an APDS (charge adjusted) round simulating combat range engagements and a shaped-charge placed on the armour plates. The steel plate is defeated, the Chobham armour is not.