Guided projectile for a rail gun

Already which year scientists of the United States are working on a project rail gun (also referred to an English term railgun — «railgun»). A promising type of tool promises excellent characteristics of the initial velocity of the projectile and, as a consequence, the effective range and penetration characteristics. But the way of the creation of such weapons is worth a few problems, first associated with the energy part of the gun. To achieve these characteristics of fire, in which rail gun will significantly exceed the gunshot, requires an amount of electricity that the railgun has not moved beyond the laboratory. More precisely, the boundaries of the test set: the gun itself, and power systems occupy large areas.

At the same time, in just 5 years, the Pentagon and the designers are going to be installed on the ship the first prototype of the rail gun is actually applicable. The test results show that the complex will be able to use railguns especially on mobile platforms such as ships. In the meantime, interest is another issue that has recently attended to customers and creators of the project. Rail gun projectile — including pig iron — can be run at hypersonic speed and power enough to hit a target at a distance. But in the process of flying projectile is subjected to a variety of effects, such as gravity, air resistance, etc. Accordingly, an increase in the target range grows and dispersal shells. As a result of all the advantages of rail gun may be one hundred percent "eaten" external factors.

In recent years, conventional artillery has been a shift to managed munitions. With guided missiles are able to adjust their own line of motion to maintain an appropriate direction of flight. Because of this, the accuracy of the fire is growing significantly. On the old days, it became clear that South American rail cannon fire will lead ammunition specifically correctable. Management of marine research activities of the U.S. Navy (ONR) announced the launch of programs from HVP (Hyper Velocity Projectile — Bullet shell). The project is planned to be controlled shell, which perfectly able to hit targets at great distances and at high speed flight.

Who exactly clear just what ONR wants to create a system of governance based on positioning system GPS. This approach to adjusting the line of movement is not new to American military science, but in this case, the task is complicated by the specificity and dispersal of the projectile discharged from the railgun. First, the contractors of the project is useful to consider the terrible congestion affecting the projectile during acceleration. In conventional artillery shells have a few seconds to shred the merits of speed of 500-800 meters per second. You can imagine what kind of overload act on it — hundreds of units. In turn, the rail gun to accelerate a projectile to have enormous speeds. This implies that the electronics and system projectile course correction to be particularly resistant to similar stress. Of course, even at this point there are several models of adjustable artillery shells, but they are flying with the lowest rates significantly, if can provide a railgun.

Second difficulty in developing managed "rail" shell lies in the method acts gun. When fired from the rail gun around the rails, to disperse the block and the shell appears the magnetic field of high power. So Makar, electronics shell must be resistant to the same radiation to electrical, otherwise expensive "smart" bomb before the release of the gun will be the most common disc. A possible solution to this difficulty can be a special screening system. For example, before firing a projectile with electrical equipment is placed into some sort of pan-piercing ammunition, which will protect it from electrical "noise" when moving on rails. After exiting from the barrel of a shielding tray, respectively, separated by a shell and continue the flight without the help of others.

The projectile passed overload, its electronics are not burned and it flies to the target. The "brain" sees the projectile deviation from the desired line of motion and issue the appropriate commands to the control surfaces. Here comes the third catch. To achieve the firing range of at least 100-120 km muzzle speed projectile should be at least one and a half to two miles per second. Of course, that at such speeds flight control is transformed into a real problem of. In 1-x, with such speed control of aerodynamic control surfaces are very, very problematic, and in-2, even if they turn out to debug a system of aerodynamic control, then it should work with the very highest speeds. In the unlikely event an errant rudder, even for a few hundredths of degrees for a little bit of a second, can very much affect the line of projectile motion. As for the gas rudders, they also are not a panacea. From here follow the rather high requirements to the mechanics of control and speed calculator projectile.

In general, scientists face far no ordinary task. On the other hand, is still quite time — ONR longs for an experienced model projectile exclusively in 2017. Another plus the technical specifications for the general type of projectile. With extraordinary speed, it does not necessarily carry an explosive charge. A kinetic energy weapon would be enough for the destruction of a wide range of purposes. Because you can give a little large amounts of electronics. In the open access were some certain number of requirements, although no formal proof has not happened. The shell length of about 2-feet (~ 60 cm) will weigh 10-15 pounds. In addition, according to unofficial disk imaging, new guided missiles can be used not only in the rail guns, and in the "traditional" cannon artillery. If this is true, then we can draw conclusions about the caliber of ammunition promising. At the current time the U.S. Navy warships equipped with the caliber artillery systems from 57 mm (Mk-110 aboard the project LCS) to 127 mm (Mk-45 is mounted on the project Arleigh Burke destroyers and cruisers Ticonderoga). In the near future, the head of the project Zumwalt destroyer should get artillery installation AGS-caliber 155 mm. Of the full range of gauges for U.S. naval artillery projectile managed more affordable and comfortable is exactly 155 mm. In addition, the existing South American guided missiles for conventional artillery — Copperhead and Excalibur — are exactly the caliber of 6.1 inches. Just the same 155 mm.

Maybe it has already made guided missiles in some measure will be the basis for a promising. But so far read about it early. All the information about the project is limited to just a few HVP theses, some of which also does not have a formal proof. Fortunately, a number of features of the rail guns can make a rough judgment about the project and at the time of its inception to present difficulties to be faced developers shell. Perhaps in the near future management of marine research by some to share with the public the details of their own requirements or even promising a full view of the projectile in the form in which they wish to receive it. But for now it remains to use only scraps of information available on the subject and fabrications.

According to the materials of websites:
http://dailytechinfo.org/
http://navy.mil/
http://globalsecurity.org/
http://naval-technology.com/
http://navweaps.com/
http://baesystems.com/

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