Doomsday Bunker Upgrade

Pushed into the tunnel, the missile slid all the way deep into the tunnel under the push of the flatbed truck.

Although it is a missile, because the tunnel is not a complete branch line, it still needs a flatbed truck to send the missile to a suitable position, and it cannot be ignited directly at the tunnel entrance.

However, the military made preparations in advance when designing the tunnel. The tunnel is more than 4,000 meters long and has a vertical depth of 1,500 meters. Although the last section has not been completely completed, it has already met the original design requirements. The use of nuclear bombs can be guaranteed.

As for the fact that the military asked Chen Xin to modify the missile, the purpose was to penetrate the last stratum that was more than 100 meters deep, so as to directly detonate the nuclear warhead in the alien creature's lair.

Although it sounds incredible to launch a missile in a tunnel, as long as the tunnel is straight and long enough, the missile can remain stable after ignition, and it is not impossible to let the missile ignite and launch in the tunnel.

Although this is as dangerous as driving a plane through a tunnel, any change in airflow and vibration may cause the missile to deviate from the intended trajectory and hit the tunnel wall to affect the hit, but it is still feasible after all.

And this ground-penetrating missile, which has been upgraded by Chen Xinzhi, has been specially optimized in this regard to ensure that the missile can reach the bottom of the tunnel smoothly and penetrate the stratum more than 100 meters deep. The warhead portion of the nuclear bomb is sent into the alien's lair.

The speed of the flatbed is constantly increasing. Although no one is driving it, through remote control, this modified flatbed is gradually approaching its speed limit.

"The booster rocket is ignited!" In the remote control room on the other side, the flatbed truck has reached the predetermined depth, and the booster rocket installed on the flatbed truck for acceleration starts to work, further increasing the speed of the flatbed truck.

At this moment, the people in the remote control room seemed very nervous. It was the first time for them to do this kind of thing, and they had never done any drills before. Everything was just a plan obtained through computer simulation. At most, it was only on Chen Xin's side. Several simulation tests have been run in the virtual system.

Actually, this is the first time.

However, this first practice is actual combat.

So no one dared to guarantee that it would be successful this time.

But again, everyone knows that there is no room for failure in this missile launch.

The reason is also very simple. What they fired was not an ordinary missile, but a strategic nuclear missile with a megaton equivalent. It is a responsibility that no one can afford.

However, with Chen Xin's upgrades and adjustments to the missile, the entire launch process has also gone through several simulation tests. In theory, there will be no problems.

Just when everyone was sweating, the staff in charge of broadcasting the situation suddenly shouted: "The missile is about to enter the horizontal section!"

"The first-stage booster rocket is separated!" The person in charge of the launch also issued his order loudly.

This order was accurately executed. When the missile entered the horizontal section, the first-stage booster rocket that had completed the acceleration work was successfully separated from the flatbed vehicle, and at the same time, the second-stage booster rocket Also ignited smoothly.

According to the predetermined plan, the first-stage rocket booster allows the flatbed vehicle carrying the missile to pass through the first section of the tunnel that is inclined downward. After entering the horizontal section, it will perform the second-stage acceleration. After leaving the horizontal section, the missile will start Start the fire, then go all the way down, to the bottom of the tunnel.

The reason for this arrangement is that no one has shot missiles in the underground tunnel, and there is a horizontal section in the tunnel that is planned to be expanded into a logistics base in order to allow the troops to go into battle better. Naturally, it cannot Just let the missile ignite and fly by itself.

However, when the missile leaves the horizontal section, the missile itself will separate from the flatbed vehicle after ignition, further increasing the speed.

This is also to increase the speed of the missile as much as possible. After all, in the tunnel, due to various influences, it is impossible for the speed of the missile to break through the sound barrier. Therefore, in order to increase the speed of the missile as much as possible, it is only possible to pass The multi-stage rocket acceleration method is used to increase the speed of the missile as much as possible.

The engine of the missile itself has been adjusted. Although it will not accelerate the speed of the missile to break through the speed of sound, it will try to make the speed of the missile as close to the speed of sound as possible to provide it with more kinetic energy.

As for how a missile that has not reached the speed of sound can penetrate the ground more than a hundred meters away, this is what Chen Xin's transformation needs to achieve.

In fact, the principle of the ground-penetrating warhead of the missile is similar to that of the armor-piercing projectile. The outer shell is made of softer materials. After hitting the target, the inner layer made of hard material wrapped in the outer shell is The warhead uses powerful kinetic energy to penetrate armor or formations.

It's just that Chen Xin used some brain-hole designs on this missile. When the missile hits the target, the hard armor-piercing warhead carrying the nuclear bomb inside it will be shot out like a shell in the barrel, so that its The speed breaks through the speed of sound, gaining enough kinetic energy to penetrate the formation of more than 100 meters.

Of course, this kind of design is not found on serious missiles. It is completely based on Chen Xin's brainstorming ideas, and then forcibly upgraded with the system upgrade function.

After all, no missile would consider launching in a tunnel, let alone how to allow a nuclear warhead to penetrate a layer more than 100 meters deep and detonate at a depth of more than 1,500 meters underground.

As for why it is necessary to accelerate the missile after the warhead that can penetrate the ground more than 100 meters deep after Chen Xin's upgrade, it is to allow the missile body to penetrate the pile of silt at the bottom of the tunnel. Ten meters long corpse.

Of course, these corpses are not as hard as the ground, but the gaps between the large number of corpses and the softness of the corpses themselves are excellent cushioning materials. If the missiles cannot be accelerated to a certain level and forcefully penetrate these corpses, it will make Missiles stuck in these bodies.

In this case, even if Chen Xin's upgraded warhead can penetrate the formation, it will be affected, lose a lot of kinetic energy, and may even be unable to penetrate the formation.

And relying on the protection of these measures, the missile finally plunged headlong into the corpses at the bottom of the tunnel, and with its strong thrust, penetrated the layers of corpses and reached the bottom of the tunnel.

"Bang!" A needle-like ground-penetrating warhead that was much thinner than the missile shot out from the top of the missile and penetrated into the ground in an instant.

Then... everyone in the remote command room felt the ground shaking under their feet.