Vol 2 Chapter 2017: 2 hand rocket

In order to make this manned spacecraft sufficiently safe and reliable, we have carried out various testing experiments on it repeatedly and tens of thousands of times to ensure that it is sufficiently safe. To this end, we have also invited relevant domestic and even international aerospace technology experts to participate in demonstrations and discussions on the related technologies of this spacecraft, and let them find faults and problems.

Even in order to motivate everyone, we also set up a special reward fund to find a problem, and we will give equal rewards according to the severity of the problem.

For this reason, this is not less complained by our manned spacecraft development project team. In their opinion, are we crazy? How can we spend money on such a fault finding group to find ourselves unhappy.

Subsequently, because of these problems, a very fierce conflict and conflict broke out between the project R&D team and the fault finding team. Sometimes the two sides are entangled in endless entanglements because of a problem, and the speculation is overwhelming, and sometimes they are about to fight.

However, with the deepening of this confrontation and cooperation, the relationship between the project R&D team and the fault finding team has become more and more harmonious.

There is no irreconcilable contradiction between them, let alone personal grievances, but it is just their responsibility and obligation to travel from the perspective of their respective work responsibilities.

It is suitable to prove that this seemingly unreasonable method has played a big role. We have found thousands of large and small problems and solved them one by one. Some of them may not be a problem for others, but for safety and reliability, for comfort and convenience, we have also made adjustments to make them more secure and more user-friendly.

Many of the technical standards have far exceeded the technical standards on the existing manned spacecraft. It can be said that we have developed and established a set of technical standards for our own manned spacecraft.

The three subsequent unmanned experimental spacecraft have been successfully launched, which has also verified the safety and reliability of our manned spacecraft, and has been highly praised by aerospace authorities and industry technical experts.

Speaking of this, Wu Hao paused for a while, and then continued to speak to the reporters in the audience: "We attach great importance to the first manned launch mission, so we strictly monitor the manufacturing process of this spacecraft to ensure that every piece of Components meet our stringent requirements.

And after the spacecraft is completed, we have conducted many tests on the spacecraft to ensure that it meets our technical standards and safety requirements before allowing it to leave the factory.

After the Walker 4 spacecraft was transported to the South China Sea launch site, it was carried out by the relevant technical expert group of the aerospace department. After ensuring that our spacecraft meets the relevant safety standards, the search and release are allowed. "

"The Jianmu-7 rocket launched by Fei Chuanfang on the manned traveler 4 this time is not a brand-new rocket. Its first-stage rocket is actually a second-hand rocket, which means that before this time, This first-stage rocket has successfully carried out two launch missions."

Hearing Wu Hao's words, the reporters off the court couldn't help but become curious. Why would a second-hand rocket be chosen for such an important first manned launch mission, and why? Is it just to save costs?

Looking at the curious eyes of everyone in the audience, Wu Hao said with a smile: "First of all, let me tell everyone that hanging this second-hand first-stage rocket to undertake the launch mission is not for cost savings.

Even if we deduct again, it is impossible for us to be confused on such a big thing.

The reason why such a second-hand rocket was chosen as the carrier rocket for the first manned launch is mainly because this second-hand first-stage rocket has successfully completed two rocket launch missions, both of which have been successful and performed well.

Compared with the new rocket, this second-hand first-stage rocket, which has performed two manned launches, is relatively more stable and reliable. Otherwise, it is impossible to succeed twice in a row.

For a retractable rocket, its performance state is generally at its best from the second to the fifth time. Because the first launch has verified the safety of the rocket, if there is a problem with that part of the rocket, the first launch can already be shown.

In fact, the reason why the traditional rocket launch is so risky is mainly because of its one-time nature. Because it is a new rocket and has not been verified by actual launch, it is natural to know whether it will be successful or not.

For recyclable and reusable launch vehicles, such a problem does not have to be considered, because the first launch has been verified. If there is a real problem, the first launch may have failed. Even if it doesn't fail, these problems will be exposed in the first and second launch, so that we can find these problems, so as to repair and ensure that it is reliable and safe enough for the next flight state. Stable and normal operation.

The second-hand first-stage rocket used for this manned launch has been in excellent condition after the first two launches, and there is basically no damage. Therefore, after a comprehensive evaluation, we decided to use it for the first stage of our launch vehicle.

As for the secondary rocket of the rocket, although it is a conventional disposable rocket, we have also put a lot of effort into it. First of all, its technology has been fully verified in previous launch missions, proving that it is safe, reliable and stable enough.

Secondly, on this basis, we optimize and upgrade it, and focus on reliability. The most popular dual-bus and dual-system structure for rockets is adopted to ensure that the rocket can immediately switch to the standby bus system when a single bus or system fails, without affecting the normal operation of the rocket.

As we all know, our Jianmu-7 rocket has no fairing and no escape tower. The Walker series spacecraft carries its own escape system~www.readwn.com~ It can instantly ignite and break away from the faulty rocket when the rocket fails, and land on the ground.

Generally speaking, the entire escape tower only works in the middle and low layers. Basically, it will be separated with the fairing soon after the first-stage rocket is separated.

This is also the most dangerous stage of the entire launch process. Because the height is too low, an escape device is required to bring the spacecraft to a sufficient height, so that the landing field above the spacecraft can have enough height and time to expand to ensure that the spacecraft landed safely.

At this time, our fusion design and the advantages of our use of second-hand first-stage rockets are reflected.

First of all, a second-hand first-stage rocket with relatively stable performance is used, so the risk of taking off and the middle and low altitudes before the first-stage rocket falls off can be minimized. And this is precisely the most dangerous stage of the entire rocket launch process. "

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