Misznay–Schardin effect

The Misznay–Schardin effect , or platter effect, is a characteristic of the detonation of a broad sheet of explosive.

44M LŐTAK EFP mines at the upper left corner of the picture. Taken on 15 October 1944, Operation Panzerfaust, after surrender and disarmament of the royal guards of the Hungarian Army
MPB mine showing a cylindrical, concave Misznay–Schardin warhead


Explosive blasts expand directly away from, and perpendicular to, the surface of an explosive. Unlike the blast from a rounded explosive charge, which expands in all directions, the blast produced by an explosive sheet expands primarily perpendicular to its plane, in both directions. However, if one side is backed by a heavy or fixed mass, most of the blast (i.e. most of the rapidly expanding gas and its kinetic energy) will be reflected in the direction away from the mass.[1][2]


The Misznay–Schardin effect was studied and experimented with by explosive experts József Misznay, a Hungarian, and Hubert Schardin, a German, who initially sought to develop a more effective antitank mine for Nazi Germany. Some sources[which?] claim that World War II ended before their design became usable, but they and others continued their work.[3] Misnay designed two weapons: the 43M TAK antitank mine and the 44M LŐTAK side-attack mine. The Hungarian army used these weapons in 1944–1945.[4]

The later AT2 and M18 Claymore mines rely on this effect.[5]

See alsoEdit


  1. ^ Practical Bomb Scene Investigation, James T. Thurman, CRC, 2006, p. 23)
  2. ^ Misznay Schardin effect Archived 2016-03-04 at the Wayback Machine
  3. ^ Ragnar's Action Encyclopedia, Ragnar Benson, Paladin, 1999, p. 70.
  4. ^ "Archived copy". Archived from the original on 20 November 2007. Retrieved 27 September 2009.CS1 maint: archived copy as title (link)
  5. ^ Jane's Mines And Mine Clearance 2006/2007, Colin King, Jane's Information Group, 2006, p. 31.