BLU-107/B Durandal The Durandal is an airfield denial weapon used by several air forces around the world. Designed by the French company Matra in the early 1970s, it entered service with the U.S. Air Force in the late 1980s. After being dropped from low altitude, the unguided Durandal deploys a parachute from its tail. When the Durandal's nose is pointed down, its 330-pound high explosive warhead is rocket-fired into the runway. After penetrating up to 15 feet of concrete, the warhead detonates and craters the runway, rendering it useless for aircraft. Click here to return to the Cold War Gallery.