A big country of aerospace with black technology

"emission!"

The crimson flag waved down neatly.

Accompanied by the launch command, the Dongfeng-17 ballistic missile took off from the ground like an off-string flying arrow.

A long cloud of smoke was left behind, which quickly disappeared from everyone's field of vision.

"It's fast!"

After watching the take-off process of Dongfeng-17, the old chief couldn't help but sigh with emotion.

Although he has not been exposed to Dongfeng-17 missiles before, he has been exposed to similar ballistic missiles.

Even without a professional speed measuring device, he can tell that the takeoff speed of Dongfeng-17 is at least twice that of other ballistic missiles.

The engineers on the side have already completed the speed measurement work.

"The average speed in the initial stage reached Mach 7.5."

Zhang Xingyang looked at the data displayed on the display of the military notebook, and reported a data to the old chief who was still waiting for the result.

"Hey!"

"Isn't that nearly twice as fast as the long-range ballistic missiles we used before?"

Although the old chief had already made a rough guess in his heart, when he actually heard the data, he was still taken aback.

Faster take-off speed means that it can enter the outer atmosphere and fly at a faster speed, avoiding being intercepted by the enemy's anti-missile system during the take-off phase.

"Takeoff speed is only one aspect."

Zhang Xingyang said after reading the data of the take-off stage.

"The key is to greatly reduce the time of the ascent segment."

"Reduces the possibility of an enemy intercepting the missile at this stage."

Although it is unlikely that the enemy will break into the domestic territory and intercept the ballistic missile during the take-off phase, as a scientific researcher, we must consider such extreme situations.

"But the current speed is not the fastest."

"oh?"

"When will the fastest speed be achieved?" The old chief was a little curious.

"When flying outside the atmosphere, it can reach 16 times the speed of sound at the fastest."

This point has been simulated and tested as early as when the wind tunnel experiment was carried out in the YF-21 wind tunnel.

Therefore, Zhang Xingyang pre-estimated, even taking into account the impact of various adverse realities.

The minimum speed of the missile will not be lower than Mach 15.5.

"However, because we adopt the configuration of a waverider and follow the trajectory of Qian Xuesen, the distance at this stage will not be very far."

"The total range of the missile is 7,200 kilometers, and the distance it flies outside the atmosphere is only about 1,600 kilometers."

"This is also a compromise made to increase the missile's defense penetration capability."

The waverider configuration, because the flight time outside the atmosphere is short, so the range cannot be made very far.

If the time spent flying outside the atmosphere is increased from 20% to 50%.

At least it can increase the range of about 3,000 kilometers, reaching a range of more than 10,000 kilometers.

If so, Dongfeng-17 can be regarded as an intercontinental ballistic missile.

However, doing so will greatly increase the possibility of the missile being hit by the enemy's anti-missile system outside the atmosphere.

At this time, looking up to the sky, the figure of the missile has become invisible, and only the long smoke trail can prove the trace of the missile flying just now.

"It is estimated that there are still 20 minutes to reach the designated place."

Zhang Xingyang looked at his watch and said to the old chief beside him.

"Seven thousand kilometers, twenty minutes to arrive."

The old chief said with emotion:

"Twenty minutes, no matter how fast the enemy is, the reaction window is less than ten minutes."

In fact, this is the case where the old chief overestimated the enemy.

Generally speaking, if you want to detect the launch of such missiles, you can only rely on military reconnaissance satellites in space.

After discovering an abnormal heat source on the ground, report the information to the rear command center.

Then the command center judges based on the existing information whether it is launching a rocket or a missile.

The launch of a rocket is largely the same as that of a missile.

Even many rockets were originally modified from intercontinental ballistic missiles.

There have also been a number of intercontinental ballistic missiles in China that have exceeded their service time and have been transformed into rockets.

However, the launch information of the rocket is generally made public before the launch.

The test launch of the missile or the test launch is basically not made public, so if it is the heat source information that cannot be queried.

So basically it can be identified as a missile.

After completing the judgment, the command center will notify the anti-missile system to start working.

The supercomputer began to calculate the scheduled trajectory of the missile, and the anti-missile missile began to be in place, ready to attack at the middle or end of the ballistic missile.

The initial flight time of the Dongfeng-17 waverider ballistic missile is less than two minutes, and even if the flight time outside the atmosphere is included, it is only about seven minutes.

At this time, the command center on the opposite side probably just received the news that the missile took off.

But at this time, Dongfeng-17 had completed re-entry into the atmosphere and began to "float" in the atmosphere.

It is basically impossible to complete the missile interception work at this stage.

Because of the most important premise, there is no way to complete the missile trajectory prediction work.

Even with a supercomputer, it is difficult to calculate the accurate trajectory of a missile moving up and down in an atmospheric disturbance environment.

Although the fluctuation range can be predicted, the accuracy is still too low compared to the anti-missile work.

Unless they can have a large amount of data on the movement of Dongfeng-17 in the atmosphere to build a sufficiently accurate movement model, there will be a slight possibility of improving the accuracy of the movement model to a sufficient level.

But now, even Zhang Xingyang, who is in charge of missile research and development, does not have so much data to build a model.

Not to mention the enemies who don't even know about this matter.

Time passed quickly, and the Dongfeng-17 waverider missile began to re-enter the atmosphere after a short flight outside the atmosphere.

"Look, meteor!"

Although it was broad daylight, the warhead flying through the atmosphere at extremely high speed still emitted a white flash.

The young urban girl who didn't know, smiled and chirped to her companion after seeing it.

"It's broad daylight, why are there still shooting stars?"

The male companion on the side was obviously also a little surprised.

After all, in everyone's impression, meteors should appear at night.

In fact, meteors can also be seen during the day, but because of the strong light during the day, meteors with a certain brightness are required to be seen.

"Why?!"

"Isn't this a shooting star?"

The girl who discovered it at the beginning shouted in surprise when she saw the unknown object that was being used irregularly in the sky like a "float in water".

"It really doesn't look like it?"

"Is this a UFO?"

The male partner was also very surprised.

Street stall literature about aliens and UFOs flourished during this period.

Seeing such a phenomenon that violates common sense, it is easy for people who don't know the truth to think of the UFO they have learned before.

There is not much time for thinking for those who see the Dongfeng-17 warhead.

After leaving an irregular cloud trail in the sky, the warhead with a white flash disappeared into the sky.

That is to say, in this era, the personal equipment capable of shooting is not so developed, otherwise there will definitely be a lot of people taking pictures of this scene and posting it on the Internet.

Claiming to have seen a real UFO.

"What do you estimate is the accuracy of the missile?"

At the launch site, the old chief asked Zhang Xingyang such a question.

"Conservative estimate, within 20 meters."

Zhang Xingyang thought for a few seconds, and gave a statistic that may be bragging in the eyes of others.

But the old chief is very clear that this data is likely to be true.

And this is still reserved data, that is to say, the real error may be around ten meters.

To know how amazing this data is, it is equivalent to hitting a mosquito's mosquito leg with a gun instead of hitting the mosquito's torso at a distance of 700 meters.

Of course, unlike a bullet that can no longer control its direction after being fired, when the missile maneuvers at the end, although it will make a lot of irregular maneuvers in order to avoid the air defense and anti-missile system on the opposite side.

However, it is still possible to correct the orientation between itself and the target little by little during the continuous maneuvering process, so as to achieve the goal of accurately hitting the target.

"How did you do it?"

Such precision really surprised the old chief.

You must know that the previous long-range ballistic missiles can basically reach the accuracy of 100 meters, which is considered to be very accurate.

Of course, this is also related to their positioning in the entire ballistic missile system. The previous missiles of this type were basically equipped with nuclear warheads.

In the face of nuclear warheads, an error of 100 meters can basically be regarded as no error.

After all, even a small nuclear warhead with a yield of only a few thousand tons can create a fireball with a diameter of 100 meters.

Therefore, for those long-range ballistic missiles equipped with nuclear warheads, the accuracy requirements are not so high, and they pay more attention to the range.

However, the strategic positioning of Dongfeng-17 is different from those of its predecessors. It is not a missile used to deliver nuclear warheads.

Its role is to give the other side high-value military targets, such as air defense positions, radar systems, command centers, airports, ports, etc., a fatal blow in conventional warfare.

Because nuclear weapons cannot be used for attacks in conventional warfare, the accuracy requirements for ballistic missiles equipped with conventional warheads are even higher.

Otherwise, it is difficult to directly complete the attack on the enemy's key targets.

"In the past, long-range ballistic missiles mainly used starlight guidance."

Zhang Xingyang explained the guidance method of the missile to the old chief.

"Because it is necessary to consider that after the nuclear bomb explodes, the nuclear electromagnetic pulse generated will seriously damage many electronic devices including satellites."

"So basically, it can only be guided by using a few neutron stars or pulsars in the sky as a reference."

"However, the accuracy of this guidance method is not very good, and it is mainly used as a last resort in a nuclear war."

"In a conventional war that does not use nuclear weapons, it is basically impossible to encounter such a situation where a nuclear bomb explodes in space and seriously interferes with the electromagnetic environment."

"So considering this reality, we adopted a composite guidance method of satellite guidance combined with inertial guidance on Dongfeng-17."

The Rocket Research Institute has an extremely abundant technical reserve in guidance, which is also an important reason why they can achieve such high precision in guidance.

"In terms of satellite guidance, we mainly rely on our Beidou satellites."

Although the accuracy of the three satellites of Beidou in the first phase is not very high, even with two-way transmission, the accuracy can only reach 20 meters, but it can also greatly improve the strike accuracy of missiles.

However, the second phase of the Beidou project will soon start construction.

After completion, the accuracy of satellite guidance can be further improved.

Of course, if the low-orbit communication satellite is upgraded and the positioning function is added, it is expected that the positioning accuracy can reach the centimeter level.

However, this goal will take several years to carry out scientific research.

"If it weren't for our Beidou satellite, if we only use starlight guidance plus inertial guidance, the guidance accuracy may only reach the 50-meter level."

At this time, Zhang Xingyang thought of Chen Zhongyan, the chief teacher of the first stage of Beidou, who had passed away, and said with some emotion.

"Old Chen, if Izumi knows, I should be very pleased to see that our long-range ballistic missiles use the Beidou system."

Although the old chief doesn't care about the aerospace system, he also worked with Chen Zhongyan when he was young.

Hearing Zhang Xingyang mention this old man, he also felt a little emotional:

"If Lao Chen saw this scene, he would probably laugh happily."

Just when the two were talking about the deceased Chen Zhongyan, the Dongfeng-17 ballistic missile had also entered the final penetration state.

The high-speed maneuvering close to Mach 10 can eclipse all the terminal anti-missile systems on this planet.

Generally speaking, terminal anti-missiles can only be regarded as luck. After all, the window time is very short, and at most one wave of anti-missile missiles can only be launched.

On the uninhabited desert, within the delineated target.

Everything is quiet.

As if between lightning and flint, a fusiform object flew from the sky and hit the target field at a speed that was difficult for the naked eye to track.

"The warhead has landed!"

A very excited voice came from the communication equipment.

"Did you hit the target?"

Everyone in the launch site was nervous and looking forward to the news from the other side.

"Hit the circled target."

"However, the target point has a lot of smoke and dust, and the accuracy cannot be determined yet!"

In this test, the warhead did not carry any explosives, and it was mainly to test the operating status and guidance accuracy.

So in the target point, there is only dust, without any explosion flames.

The other side is also very happy at this time.

After all, judging from the state of the smoke and dust, the accuracy is at least within 30 meters, which has reached their preset passing line.

After waiting for a while, the other side is probably waiting for the smoke and dust to decrease a little bit, allowing them to enter the site to measure the accuracy error.

After waiting for a while, Zhang Xingyang was a little surprised by a piece of data from the opposite side.

"The actual error accuracy of the missile is only three meters!"

For missiles with great explosive power, this error can be regarded as no error at all!

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