January 5, 2017 0:00
// Pneumatic weapons
Compression and multicompression pneumatics are a fairly popular class of inexpensive compact self–sufficient “air guns” with a sufficiently high power of shots. When choosing between compression and multicompression pneumatics when buying, several differences should be taken into account – we will tell you about them in a few words below.
The device of compression and multicompression pneumatic weapons
The principle of operation of compression and multicompression pneumatics is based on the storage of compressed air, as when pumping wheels with a pump: it is the driving force of the bullet and is usually embedded in the forearm. In addition to the pump under the barrel, such models have a valve system and a chamber (reservoir) for storing compressed air, which is the source of energy that pushes the bullet.
With rapid compression, the air heats up, but then gradually cools down, transferring heat to the metal chamber. As a result, the pressure in the chamber immediately after charging is slightly higher than after a few minutes. This is reflected in the shooting: the characteristics of the shot may vary depending on the time of its production.
Compression rifles are equipped with systems with one–time recharging (pumping), multicompression pneumatics, respectively, with reusable. In compression rifles or pistols, pumping is performed once, and in them the piston also performs the function of one of the walls of the tank. It is clear that the air stored in the chamber is only enough for one shot.
Multicompression pneumatics is very similar in design to compression pneumatics, the only difference is that in the chamber of such weapons there is a compartment for storing compressed air, which is enough for several shots. Consequently, multicompression rifles or pistols make it possible to make several shots after one pumping, which usually requires about 10 pitching.
Compression and multicompression pneumatics: everything is learned in comparison
Of course, the number of characteristics of weapons that are significant for shooters is too large to be able to unequivocally assert that multicompression pneumatics is better than compression, spring-piston, etc. In addition, the parameters of such weapons always vary depending on the models, so each shooter chooses a weapon for himself, that is, according to the criteria that are important to him in the first place. And in this case, multicompression pneumatics
Positive. This class of pneumatic weapons is usually lightweight and compact. At an almost similar cost, such models are more powerful than gas cylinders and, as a rule, lighter than spring-piston ones. In addition, compared to the latter, there is no recoil in such rifles. And if we compare them with PCP pneumatics, then these models are more self–sufficient. And multicompression pneumatics with its ability to make several shots on one charge allows you to increase the size of the magazine. For example, the model of the Crosman M4-177KT 4.5 caliber multicompression air rifle has a charge capacity of 5 bullets at a power of 190 m / s. The model of the same brand, Crosman 177T tan, is made in a slightly different design, but also has a 5-charge magazine for lead bullets and a tank for 350 BB balls.
It is also important that this weapon can always be kept inflated, that is, loaded (of course, always on the fuse) without fear of planting a spring – it is absent in such models.
Minuses. Temperature sensitivity, low rate of fire, loud charging. Unfortunately, accuracy is not the strength of such weapons – the fact is that there are too many variables in the pumping system to achieve consistent uniform shots.
If we compare weapons within the same class, then the compression system is more accurate and accurate, that is, the repeatability of the characteristics of the shot, since the same amount of compressed air is always stored with one pump. In the case of multicompression models, several pumping is required for charging, and this is reflected in the heterogeneity of the power of shots.
