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STANAG 2920 Protection Levels
Military standards for ballistic protection & armour Solutions for military applications are tested according to relevant NATO standards, normally STANAG 2920 (STANAG=NATO Standardization Agreement). STANAG 2920 The adoption of standards for ballistic protection levels and testing STANAG 2920 ("Ballistic test method for personal armour materials and combatclothing") is used to measure materials ability to stop fragments and shrapnel. The measuring technique was originally developed for body armour but now see general use in all situations where fragments arethe primary concern. For instance, STANAG 2920 is used to measure Add-on-Armour systems for armoured vehicles. Tests according to STANAG 2920 are conducted by shooting "FSPs" (Fragment SimulatingProjectiles) onto the test specimen with different velocities while measuring the velocity of each FSP. By altering the velocities, after a number of shots an estimate of the "ballistic limit" can beobtained, which is the speed up to which the material defeats the fragment. Combat troops rarely suffer injury or fatality from bullets but are at high risk from primary (direct) and secondary(environmental) fragmentation. To combat these threats Intelligent Armour Limited utilises a special range of Fragmentation 'F' levels whose performance is measured by a V50 value.

Fragmentation Test (V50Test)

The V50 test is the internationally recognised standard for assessing the fragmentation resistance of personal protection. The fragmentation test is conducted using Fragment SimulatingProjectiles (FSPs) which are available in a range of weights approximately following the binomial progression. The test is conducted by firing FSPs at the armour at

increasing velocities until an averagevelocity of penetrating and non-penetrating projectiles is obtained. The higher the ballistic speed, measured in metres per second, the higher the rating of material, shown as V50 000m/s. The V50...
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