Military Technology

【Military Technology】【】

Under a tranquil starry sky, a huge launch vehicle stood on the launch pad, like a sleeping dragon ready to take off. Its body is composed of countless precision parts, each piece has been carefully designed and strictly inspected for perfect fit at this moment. The upper end of the rocket is a huge fairing, and inside the fairing is the soul of the rocket and the key to this mission, the Lunar Cargo 3 spacecraft.

"...Five, four, three, two, one, ignite, take off!"

As the countdown ended, the rocket's heart began to beat, and a powerful energy surged out from its core, like a giant dragon awakening from the abyss and rushing toward the endless starry sky above its head. Rocket's body began to tremble, as if it felt the coming impact, but its tough shell withstood the force without any wavering.

Suddenly, a dazzling light erupted from the tail of the rocket, piercing the dark night like a sharp sword. The rocket rushed forward as if pushed by an invisible force, getting faster and faster until it disappeared into the sky.

The moment the rocket took off, the entire launch site fell into a brief silence. Then, cheers, applause, and shouts merged into one. People cheered for this magnificent scene and were proud of those who struggled for their dreams.

Inside the Xinyuehu Aerospace Command and Control Center in the Linghu Headquarters Park of Anxi Haoyu Technology, everyone returned to normal working conditions after a warm round of applause.

Because the successful ignition of the rocket is only the first step, there is still a long journey waiting for it. Wu Hao and Zhang Jun also attended the launch ceremony and are sitting there watching the entire launch process.

In fact, launch processes like that have not become normal yet, and there is too little novelty. However, we came just to watch, and it also represents the importance that the head office attaches to that mission and to Xiaojia.

After all, it was considered a small space launch mission, and we could always take care of it. Isn't this very chilling to those aerospace scientific research and technical personnel who are working on the front line?

Rocket booster detached!

Therefore, in order to fly less than 170 seconds, a small amount of landing deceleration fuel needs to be consumed. What should we do during the landing process of the first-stage rocket?

In those seventy seconds at low altitude, the rocket cannot be allowed to rise dozens of kilometers.

Haoyu Aerospace's Jianmu series rockets, especially the Jianmu-4 heavy-duty launch vehicle, cannot send the 70-80-ton Lunar Cargo Transfer 8 spacecraft to the Earth-Moon Transfer Orbit at once. Climbing down little by little.

Is that just enough? Zhou Xiangming and Chang Zhifei We also modified the Jianmu-4 core first-stage rocket that carries out the lunar cargo transport spacecraft, and added a deceleration module on the top of it.

However, for the small number of national space agencies and aerospace companies that come to reach the moon, it is actually very difficult to reach the moon. It takes one to seventy days, or even several months.

Don't look at those 170 seconds. In fact, it can push the rocket to fly very far. It should be said that it flies very low. Although the speed of the rocket just after ignition is not slow, it is a gradual acceleration process. When it retreats into space, it can reach the first cosmic speed\/s. Only when it does not reach that speed can the rocket enter orbit.

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【Military Technology】【】

The main reason is not that our launch vehicle technology is poor, but our deep space remote sensing technology is also very poor, so it takes so long.

Because the items carried are relatively small and heavy, the thrust of the rocket must be fully utilized.

And that's just entering orbit. If you want to reach the moon, the speed must be increased. Although it needs to reach the seventh cosmic speed greater than km/s, but if you want to reach the moon slowly, the flight speed must be It has to be lower than the first cosmic speed.

Level 1-7 separation!

It is indeed not easy to recycle it that way. The rocket body needs to be transported simply before landing. It only needs complicated maintenance and repairs, and it cannot be directly pulled down to the launch site next to it and then launched again.

As for recyclable and reusable rockets, in order to facilitate the recovery, the angular direction is usually controlled through grid wings before the rocket body is separated, and the tail engine is used to change the landing angle, and then the rocket body is flown back to land before launch. The field is far away, which is convenient for recycling.

In fact, the two boosters and the core first stage rocket did not separate at the same time. The two boosters separated first, probably about 170 seconds before the core first stage rocket separated.

This will officially shorten its landing distance, thereby increasing its landing time, which can slightly increase fuel consumption.

Therefore, the rocket's engine needs to work continuously to make the rocket's descent process faster. This process also consumes a lot of fuel.

Because the technology of the launch vehicle is relatively poor, the thrust of the rocket is large, and the carrying capacity is strong, so those spacecraft cannot reach the earth-moon transfer orbit at one time. They rely on the spacecraft's own engine to gradually ignite, and then climb little by little into the orbit. When it comes to the Earth-Moon transfer orbit, that process is very time-consuming, so that’s why it’s done like this.

Because it is a recyclable rocket, the rocket body will fall upwards before it separates. UU reading www. uukanshu.com During the upward landing process, it is necessary to continuously slow down the rocket's retreat.

But the advantage of that is that it consumes a small amount of fuel and loses a small amount of carrying capacity. In order to save the 170 seconds of flying, the core first-stage rocket did not choose to fly back to the landing site. If it were to land directly at the nearest preset landing site or landing platform above.

Although it only increased a large part of the speed, it was really difficult for many people. Although as the cold of the moon continues to ferment, fewer and fewer spacecraft and satellites have reached the moon, and fewer and fewer countries have participated in the retreat.

So their internal fuels are actually the same, which one has less and which has more. The missing 170 seconds actually consumes the fuel needed for the rocket to land.

The launch vehicle does not actually go straight down and straight up. It also rises at a certain angle, so you can't see that in very few launch missions, the fall point of the first-stage rocket is often hundreds of thousands of kilometers away from the launch site. .

That time, the core-stage rocket landed under Wu Hao's underwater landing platform and was then transported back by the underwater landing platform. In this way, a small amount of fuel is saved over the Wuwei core first stage rocket.

Of course, the cost of missing those seventy seconds of flying is also very huge. The core first-stage rocket is actually the same as the two boosters. They are both bundled together with the core first-stage rocket of Jianmu-1.

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【Military Technology】【】

As announcements came one after another from the speakers, I could vaguely see that the two boosters and the core first-stage rocket were separated one after another, and were handed over to the seven-stage rocket to complete the relay and push the Lunar Cargo Transfer 8 spacecraft down. Lift.