Conventional bullets for conventional weapons slow down very quickly when hit in water. They lose their destructive power after a couple of meters and therefore a dive into a pool or other body of water is a good enough idea to save life under fire. However, the Norwegian company DSG has developed special underwater bullets that use the phenomenon of supercavitation and which are capable of providing targeted shooting underwater at distances up to 60 meters, while preserving, at the same time, enough energy to cause damage.
The phenomenon of supercavitation is the “wrapping” of an underwater projectile in an air bubble to radically reduce friction and resistance when moving in an aqueous medium. This phenomenon is already used in some types of torpedoes that can move five times faster than conventional torpedoes, and in the future, this same phenomenon will probably be used to create ultra-fast submarines.
Paradoxically, the phenomenon of supercavitation can be caused by giving the bow of the underwater vehicle a flat shape with a necessarily sharp edge. It is this edge that provides a push forward to the water, which leaves behind an air bubble sufficient to cover the entire projectile. And in the case of torpedoes and submarines, the phenomenon of supercavitation can be increased due to the flow of air or other gas discharged from the nozzles of a special tip.
Representatives of the DSG company encountered some difficulties in placing the first order for the manufacture of a batch of their bullets. Industrial equipment capable of providing the required manufacturing accuracy was only at the disposal of aerospace enterprises. Nevertheless, DSG managed to get the first batch of .50 mm 12.7×99 mm NATO bullets, which were used for underwater and ballistic tests.
The use of DSG submarine bullets opens up a host of new possibilities for conducting combat operations under water. For example, submarines, having plunged to a shallow depth, will be able to effectively hit surface or flying targets, for example, helicopters. A 12-mm DSG bullet fired from a 5-meter depth surely hits a target in the air at an altitude of up to 1000 meters. Moreover, submarines will be able to literally shoot approaching torpedoes.
However, if the helicopter’s weapons are equipped with super-cavitation ammunition, the submarine will need to go very deep very quickly to avoid the fatal consequences of meeting such a helicopter.
Now the DSG company produces two versions of the CAV-X bullets, option A2, which can be released only in the air, but without changing the course, they cross the border between water and air. The second option is X2, these bullets can be fired under water, while at the same time on water targets.
During ballistic tests, DSG bullets broke some of the existing records. In these tests, the so-called ballistic gel was used, the material whose density and behavior most closely matches all the parameters of the tissues of the human body. The gel is packed in briquettes 40 centimeters thick, and an ordinary 7.62×51 bullet fired from the AR 15 rifle produces a huge air bubble in the first briquette, which causes a kind of explosion, and gets stuck in the second briquette, deepening by a total of 50 centimeters.
However, the CAV-X bullet, when it hit ballistic gel briquettes, flashed all 10 installed briquettes, leaving behind only a thin “tunnel” and not causing the gel to oscillate. This is a kind of ballistic record, albeit unofficial today. And when DSG plans to officially record its record, they will need a much larger number of ballistic gel briquettes.