A big country of aerospace with black technology

In August, above the vast meadows.

A huge site has been marked out, and the ground leveling work has been done in the central area.

At the very center, a circle of signs regularly divides the ground.

This is the test site for the Hongyan rocket's first land recovery.

After several months of adjustment work, the recovery research of the Hongyan rocket is basically completed.

What will now take place will be his first recovery.

However, although it is a rocket recovery test this time, the Hongyan rocket will not go through the real launch process.

Instead, shortly after takeoff, it turned around and flew towards the rocket recovery site.

Beside the recovery site, in various low buildings, everyone is making the final preparations for rocket recovery.

To be honest, in the process of rocket recovery, what everyone can do is actually limited.

After all, in the process of landing, everything is controlled by computer, even if you want to control it, there is no way.

However, there is still a lot of preparatory work to be done, the most important of which is various fire and explosion protection work.

Since the rocket explosion accident last year, the emphasis on fire prevention and explosion protection has increased by several orders of magnitude.

"Brother Xingyang, Brother Bo and the others should be launching soon, right?" Qin Ming asked looking at the time on his watch.

"Three and a half minutes."

Zhang Xingyang glanced at Qin Ming beside him.

"Why, don't you have confidence in the return control system you made?"

Qin Ming was overwhelmed, but he wasn't particularly embarrassed:

"I'm a little worried. After all, this is our first experience."

"There is no precedent for rocket recovery in any country in the world."

"I don't know if I can succeed this time."

Zhang Xingyang patted Qin Ming's shoulder, smiled and said:

"It's okay to fail this time, we can afford it now."

"And now that the low-orbit satellite communication network project has been approved, we will have a lot of opportunities to verify our technology in the future."

"Nothing to worry about."

Zhang Xingyang glanced at his watch and said, "There are still two minutes, take a deep breath to ease your emotions."

"Wait a minute, when you are busy!"

After this explanation, Qin Ming also realized that there is no need to worry about himself now.

So after taking a few deep breaths, he calmed down his nervousness.

"The launch is about to start over there, go back to your job." Zhang Xingyang looked at the time and said to Qin Ming.

In the launch center on the other side, Geng Bo and his team were counting down the rocket launch.

With the end of the countdown, the Hongyan rocket rose from the side of the launch pad.

The recycling yard where Zhang Xingyang was located also received the news that the rocket had already departed at this time, and began to wait nervously.

This launch does not require so much fuel because the rocket does not really re-enter and return from the atmosphere.

The fuel tank of the first-stage rocket was not filled with fuel beforehand.

This is also to prevent, if the rocket fails to recover and explode, it can reduce the power of the rocket explosion.

Because the distance is not very far, after the rocket flew for a few minutes, it was already close to the range of the recovery site.

At this time, everyone in the recycling yard hid behind the explosion-proof bunker made of reinforced concrete several meters thick.

When tens of kilometers away from the recovery site, the rocket's engine began to gradually reduce its thrust, and began to be controlled by the four-sided rudder to adjust its own direction.

Adjust your own angle a little bit, and gradually transform yourself from a state almost parallel to the earth to a direction perpendicular to the earth.

When the rocket was only a few kilometers away from the recovery site, the rocket was almost at ninety degrees to the ground.

And at this time the speed of the rocket has also become very slow.

Of course, this is also compared to the extremely fast speed of the rocket when it is usually launched.

When the rocket came over the launch site, it was completely perpendicular to the ground.

It was at this time that the four supporting legs on the lower part of the first-stage rocket popped up to provide support for the rocket when it landed.

Looking out at the rocket landing site from the blast-proof glass on the blast-proof bunker made of reinforced concrete.

The flames ejected from the tail of the rocket are now very weak, but they still set off gusts of wind on the flat ground.

The gravel and sand on the ground blow around.

As the height of the rocket got lower and lower, Zhang Xingyang's heart also rose higher and higher, almost reaching his throat.

As the altitude dropped, the rocket began to automatically shut down several engines that had been working before.

The engines that provide the rocket's thrust range from five to three to only one.

In the end, when the height was only a few meters left, the only engine that was working had also stopped working.

The rocket weighing hundreds of tons fell directly to the ground, with four supporting legs made of high-strength titanium alloy.

Each can bear nearly a hundred tons of pressure. Fortunately, the material science of the Rocket Research Institute is still passable, and there is no breakage.

Seeing that the rocket had landed firmly on the recycling field, everyone didn't celebrate first.

Instead, he rushed out and began to observe and collect various recovery data of the rocket.

In particular, a large number of engineers responsible for rocket maintenance have long been impatient to check the condition of the rocket.

Especially damage to the rocket propulsion system.

You know, on this rocket that has almost no fuel, the most valuable thing now is his propulsion system consisting of 11 engines connected in parallel.

For each propulsion system, the total price of the 11 YF-110 liquid oxygen kerosene engines above alone is as high as 20 million yuan.

This does not include the cost of the control system of the propulsion system.

Fortunately, the rocket uses liquid oxygen kerosene, a fuel that does not produce highly toxic substances. If the traditional unsymmetrical dimethylhydrazine fuel is used, no one dares to rush up without any protection.

Zhang Xingyang also followed the engineer who ran all the way, and quickly ran towards the rocket standing on the recycling field.

Although the recycling yard was still filled with dust and heat waves at this time, everyone ignored these slightly harsh conditions

Panting heavily, he came to the side of the rocket. After taking a few deep breaths, Zhang Xingyang carefully observed the external situation of the rocket.

During the recovery process, due to the relatively large force, although the four supporting legs that popped up from the rocket body did not break, they also deformed to a certain extent.

This shows that even the supporting legs made of titanium alloy materials cannot withstand the weight of such a behemoth.

However, if the rocket's engine shutdown procedure is slightly improved during the descent, the pressure on the supporting legs can be effectively reduced.

Zhang Xingyang looked at the rocket in front of him like a hill, and stretched his waist.

Looking at the vast expanse, the blue sky looks like the deep sea.

Now it can be said that the vast world has a lot to do!