![kontakt 5 era kontakt 5 era](http://fofanov.armor.kiev.ua/Tanks/EQP/kontakt5_1.jpg)
This completely prevents chain detonations. The detonation of one Kontakt-1 block generally has little effect on the neighboring blocks due to the sufficient sturdiness of the 3mm sheet steel boxes. This was always done as a safety precaution before putting tanks into long term storage.
![kontakt 5 era kontakt 5 era](https://media.moddb.com/images/groups/1/3/2074/relikt.jpg)
The 4S20 explosive elements can be removed from the block by simply unbolting it, essentially leaving empty metal boxes bolted to the tank.
Kontakt 5 era full#
A full set covering the entire tank weighs approximately 1.2 tons. The weight of each block is 5.7 kg and the reduced size block weighs slightly less. This essentially means that large areas of the tank may become unprotected after it is doused in burning napalm. However, the 4S20 elements may still constitute a fire hazard if the tank is attacked with napalm because the explosive charge will still burn when exposed to intense heat for prolonged periods. The low sensitivity also makes Kontakt-1 easier to defeat by tandem warheads using the non-initiation approach.
![kontakt 5 era kontakt 5 era](https://bellesartsferran.com/9439-superlarge_default/arab-revolutions-border-wars-vol-3-libri-modellismo.jpg)
The highly insensitive nature of the plastic explosives contained inside 4S20 explains why Kontakt-1 has practically no effect on KE rounds - they are so insensitive that they fail to detonate when hit. If a warhead impacted the middle of a Kontakt-1 block, the shaped charge jet will intersect with the 4S20 element of the first block, and then continue into the next block, where it will intersect with both 4S20 elements for a total of three intersections. As you can see, even if a warhead impacted the edge of one of the Kontakt-1 blocks, the design of the blocks is such that the jet must pass through at least two 4S20 elements. The column of numbers 'N' to the left indicates the number of reactive plates that a shaped charge jet must pass through depending on the point of impact. This is examined in the d iagram below, taken from the book " Защита Танков" (Protection of Tanks) by V.A Grigoryan. It is sometimes claimed that the large number of small gaps between the individual blocks leaves a statistically large portion of the tank surface vulnerable, but this is only partially true at very specific angles. The operating principle of the armour lies in the disruption of shaped charge jets through the violent separation of the steel plates sandwiching the explosive layer upon detonation. Each Kontakt-1 block consists of two 4S20 explosive elements which are composed of plastic explosives sandwiched between two flat steel plates.