Railgun, using electromagnetic force to push shells, a kind of kinetic energy weapon with great lethality, this thing is a new concept science fiction weapon before Huogu crossed, and only appeared in those science fiction film and television works and novels.

　　 Unlike traditional cannons that use violent chemical reactions to provide propulsion, the railgun itself does not need to consider the powerful shock waves generated by chemical explosions and the smoke after the reaction.

　　 Whenever the traditional artillery wants to increase the power of the artillery, the barrel needs to be lengthened to stabilize the ballistic, and the charge of the artillery shell must be larger to provide more powerful shell propulsion.

　　 In short, the volume needs to be larger and larger.

　　 If it’s just this, it’s fine, but once it is put together with another physical law, the problem will become very serious.

The strength of an object will become fragile as the body enlarges. The fundamental reason is that the internal stress increases, and the strength provided by the atomic bond can only be barely counterbalanced. Once the external force amplifies the stress, it exceeds the atomic bond itself. The power that can be provided, then the object will be declared disintegrated.

　　 Therefore, the artillery barrel needs to be thickened to resist the shock wave generated by the explosion of the shell charge.

　　 But the rail gun does not need to consider this problem, so this type of cannon was generally favored by all countries when Huogu was still on the earth.

　　The only problem that prevents countries from spreading this type of artillery to the military is energy, which consumes too much electrical energy. The essence of magnetic railguns is to convert electrical energy into kinetic energy for propelling shells.

　　 On the chaotic battlefield of artillery fire, a cannon connected to the nuclear power plant at the rear is undoubtedly a bad idea. The mobility alone is enough to make the military generals turn around and leave.

　　 But Huogu doesn't need to think about this.

Energy Supply? Every corner of the surface, including the seabed, is using chemical energy to generate electricity. There is a power station on the surface of the planet to power the magnetic railgun. The low-temperature superconductor realized by dry ice is built in the rhizome, and there is no loss and global coverage. That's it.

　　 It is to build these, Huo Gu completed the projecting design of the Sky Eye to space in a perfunctory manner, directly applying the design layout of the Earth rocket.

　　 When the planet's rotation turned the muzzle direction of the railgun to aim at the alien fleet, Hogu's order was issued.

　　 "Launch!"

　　 After the order was given, the fist-sized metal body began to accelerate under the action of the electric field.

Due to the opposition to the gravitational force of the planet itself, the speed of the metal body can increase by ten meters per second every one meter travels. The air resistance is negligible. In order to avoid friction and heat generation, the entire giant structure will ignite spontaneously. All of the air is sucked away, in a vacuum state, the muzzle has been deep into the escape layer, there is no need to worry too much about the air entering from top to bottom.

The length of the 　　 orbital gun has reached a length of 1000km. This kind of monster-like material science has not been mastered even by the humans on earth.

　　 This is the accumulation of Huogu over such a long period of time since the crossing, and it is also the reason why Huogu didn't ask them to study chemistry forever.

　　The essence of chemistry is the atomic bond structure between atoms. The entire macroscopic world is constructed by losing and gaining electrons. More essentially, it is the ‘electromagnetic force’, which is one of the four forces on the microscopic scale.

　　 With this understanding, Huo Gu has been trying various types of atom combinations since the ancient times. As long as the atoms can be obtained on the planet, they have basically been combined again.

　　 The difficulty of Huogu's understanding of chemistry is like the difficulty of a child's understanding of assembling building blocks, let alone having such a long time of accumulation.

　　According to the conversion, the length of the magnetic rail gun barrel is approximately equal to the speed of the shell itself, that is to say, the initial velocity of a fist-sized shell when it leaves the muzzle is 10,000km/s.

　　 What kind of concept is this?

　　 This is one-thirtieth the speed of light, and the accelerated projectile itself has a mass of 10kg, and the kinetic energy has reached 50 million joules. Basically, there are no atomic bonds that can withstand this level of kinetic energy.

The key is that there are more than one projectiles that have been launched into the universe. Due to the particularity of the railgun itself, there is no need to consider the airtightness of the explosion chamber, the way the projectiles are dropped, and the “metal storm” once famous on the earth. Similarly, it does not matter if the distance between the projectiles advancing in the orbit is reduced to one decimeter, because the vacuum environment in the barrel does not need to consider the cavitation effect.

　　 There is not only one similar building, so the scene displayed is a horror barrage with a speed of one-thirtieth the speed of light, and 500 billion fist-sized projectiles are projected.

　　 However, although these projectiles are powerful, they still need to run for seven or eight hours to hit the target, which gives the alien fleet time to react.

　　 The announcer's rapid report echoed from the bridge.

　　 "Commander! A large number of objects are approaching at high speed through radar echo scanning! Speed ​​is 10000km/s! Launch direction, target star!"

"Tell the whole ship to change the course, spread out the formation, open the gap~lightnovelpub.net~ The fleet commander calmly gave instructions, and his eyes locked on the projector, and the warnings on it were a circle of blood red. The sign is approaching its fleet at high speed.

　　 The time is the fifth hour after Huogu launched those metal bullets. Since the two sides are approaching at a high speed, the relative speed is higher and the encounter time is shorter.

　　 Even on the bridge, the aliens could obviously feel a kind of micro-shock. Obviously, the spacecraft was shot.

　　 "Thirty parts of the vibrating armor are damaged!"

　　 "Good airtight!"

　　 "The engine group is normal!"

　　 "The life support system is normal!"

　　 "Four turrets are damaged!"

　　……

　　 The report sounded one after another, and the commander's tight expression showed a little slack, and he asked immediately.

　　 "What happened to the ships?"

"Six ships have been damaged due to too many shots. Three ships are being repaired due to hitting the vector nozzles, which may affect the deceleration of the spacecraft behind. Other ships survived because of your previous command to turn on the vibrating armor. It's difficult, it's just that the vibration armor is damaged."

　　The commander nodded slightly and gave the order again.

　　 "Order the maintenance team as soon as possible to repair the vibrating armor. This kind of attack can never be only one time, and the ships should maintain the current dispersed formation and do not change."

"Yes!"

　　 If Huogu knew the result of this attack, he would probably jump his feet with anger, if he had feet.

　　Although it cannot be said that he has high hopes for this wave of attacks and believes that he can win or lose in one go, the result of this time is far lower than what Huogu originally expected.

　　 The existence of vibrating armor made Huogu's raid ended without a problem. It consumed a lot of energy, material and energy, and only six ships out of 10,000 warships were exchanged.