Testing and analysis of multi-liner EFP warheads

Today Explosively Formed Pentrator (EFP) designs are exceeding one Charge Diameter (CD) or Caliber in length with a Length to Diameter Ratio (L/D) that is approximately 3-4. To produce an EFP with greater perforation capability it would be necessary to form EFPs that are much longer than one CD and greater than an WD of 5. One approach to achieving greater performance with an aerostable EFP was Prasented at the 18th International Symposium on Ballistics in San Antonio, Texas USA in 1999. Using a Tantalum liner to form the rod section and an Iron liner to form the stabilization base demonstrated that an aerostable WD >3.5 EFP was achievable. In a follow-on study, techniques were explored to determine if it were possible to form EFPs using two-and three-liner configurations to form two/three independent aerostable rod shaped EFPs for increased penetration at very short standoffs and multi-hit capability at longer standoffs.