I ask you to build tractors, but you build rockets?

Due to the small take-off mass of the rocket, the launcher is extremely simple, just some ordinary steel structures, mainly used for fueling and connecting the rocket electrically.

On the 24th, the rocket had been transferred here, and on the 25th it was erected by a crane and placed on the launch pad.

In the open space not far away are two tankers containing liquid oxygen and kerosene, which will be refueled within an hour before launch.

Because the launch site was built in a hurry and the layout of the launch control room was also very simple, a simple board house was built behind the hilltop a few hundred meters away.

I have to say that the 30-meter rocket is quite spectacular when standing up. It is at least 10 stories high and can be seen clearly even from the top of the mountain.

"The launch is tomorrow. We must do a self-inspection before the launch. If there are any problems during the launch, stop immediately. Dangerous operations are absolutely not allowed. Do you understand?"

Lin Ju was telling Guo Shen and several higher-level technicians that although he wanted the mission to succeed, he never wanted to risk anything.

After all, there were dozens of tons of fuel, and the hole opened could bury everyone in the factory and their whole family. If you were not careful, it would be a big accident.

"Don't worry, boss. Xinyuan 1 is a very mature design and is absolutely up to standard in manufacturing. The number of hidden dangers discovered during the four inspections before leaving the factory was less than 20, and all have been corrected. There is a self-inspection before launch, so there will be no problems." questionable."

Lin Ju nodded. Guo Shen was at least a former Aramco engineer in the data room and should be familiar with the rocket launch process. He still believed in the judgment of professionals.

"There is also the Publicity Department. How are the live broadcast equipment prepared? It will be broadcast live on the entire network."

Cai Yuanfa, who is also the director of the Publicity Department, patted his chest and confirmed:

"Don't worry, Mr. Lin, I asked people from the TV station to guide me, and there will definitely be no mistakes."

"Satellite, where is the satellite?"

Lin Ju turned to ask the person in charge sent by Nanjing Institute of Technology. The person in charge had been responsible for the installation and docking of satellites and rockets in the factory.

"As of yesterday's test, all indicators of the satellite are normal, and the rocket body is installed very well. As long as it can be sent up, it will definitely work."

All preparations were completed. Lin Ju was in a wonderful mood and looked at the system panel again.

After several subsequent operations, the settlement gain has increased to 4%. With the popularity accumulated through live broadcasts, it is impossible to increase it to 5% or 6%.

At 7 o'clock in the morning on August 26, lights were already on around the launch site.

All personnel involved in the development of rockets and satellites, a total of more than 300 people, gathered on the hilltop of the control room to watch the rocket on the launcher.

Xinyuan-1 will be launched at 11 a.m. and is undergoing repeated self-tests again and again.

Live broadcasts on major video platforms have begun, but the number of people at this time is only a few hundred people.

However, on the road outside the launch site, two people in a car were approaching while cursing.

"The 'burning torch' is too unreliable. I post it but don't reply. I give you an address and there is no news."

"Didn't he say he was a security guard? He might have been caught for leaking secrets."

"Do you believe this? He also said his name is Wang Ergou!"

"If you don't believe it, why are you driving here so early in the morning?"

Yes, these two are aerospace enthusiasts who listened to Lin Ju's post, but that's not entirely true, because Xin Yuanguan V released the launch news a little later, and the launch site is indeed here.

By the time they arrived at the expected place, many people had gathered around them.

It is far away from the launch site. To ensure safety, the local government and public security have set up several kilometers of cordon and deployed hundreds of personnel to prevent passers-by from intruding.

The well-informed nearby villagers and people in the town had already known the news through various channels, and got up early in the morning to watch the rocket.

This is a live viewing. Previously, rocket launches were only broadcast live on television.

At 9 a.m., the control room approved the refueling.

About 80 tons of fuel were slowly added to the tank, and the area around the rocket and launch tower was suddenly shrouded in white smoke. This is vaporized liquid oxygen. In order to prevent the tank pressure from being too high, a small part of the vaporized oxygen will be continuously removed.

As long as any country's rocket uses liquid oxygen as the oxidizer, you can see continuous white smoke floating out before launch.

So when you see white smoke floating from the rocket, it means that it is ready for launch and may ignite at any time.

At this time, the popularity of online live broadcasts has finally picked up. The camera is firmly focused on the Rockets. The number of viewers has rapidly expanded to over 10,000, and is still increasing.

Everyone in the control room was extremely nervous, checking various parameters of the rocket over and over again.

Sixty minutes before launch, another round of self-inspection begins.

Lin Ju, Tang Weitian, Zhou Rui and others stood on the top of the hill outside the control room, chatting while watching the rocket.

"Classmate Lin Ju, actually I have always wanted to say something. Your rocket engine is very good, but the rocket body design... To be honest, there are some problems, not safety issues, but other aspects that I can't understand. But at that time, you guys had already entered processing, so I didn’t ask.”

"Oh? Professor Tang, please tell me, what's the problem?"

Lin Ju asked quickly. Tang Weitian took out a notebook and started writing:

“Generally speaking, rockets are designed based on payload objectives, such as how many kilograms of payload do I want to carry to low-Earth orbit, sun-synchronous orbit, or the moon, etc. Even if the take-off mass is similar for different purposes, the structure will be very different.

If your rocket slightly increases the diameter of the rocket body to 3 meters and expands the take-off mass by about 10 tons, it can at least quadruple the low-Earth orbit transport capacity to 1.6 tons instead of the current 400 kilograms. This only shows that the designer’s purpose is actually Not low Earth orbit.

However, I calculated that its sun-synchronous orbit, geosynchronous orbit, and geostationary orbit are not correct, and it does not seem to be the designed orbit target.

The design of this rocket is very mature. It is not necessary to sacrifice so much transport capacity for a special purpose. You see, the current Xinyuan-1 actually wastes about 20% of fuel. It only needs small changes in the upper stage and the first stage. Mass distribution can increase transport capacity several times. I don’t believe its designers could have thought of this. "

"Yes, I originally thought that the first test launch might be more conservative, but this is too conservative."

Zhou Rui and others also agreed, and they understood it immediately.

Lin Ju was shocked when he heard this, and quickly asked the system in his mind, and the system quickly gave the answer.

The drawings given by the system come from countless humans in parallel time and space. Each earth has certain differences, and the rocket is not necessarily designed to be launched on the earth.

The system did not have the ability to modify, so it could only find rockets that could approximately meet the requirements, so the DX-1 was thrown out.

Therefore, it is obvious that the designed launch site of DX-1 is definitely not the earth or the earth's orbit, which will lead to the current carrying capacity being severely reduced.

This kind of mistake is confusing to experts. The rocket body design is obviously good, so how could there be such a low-level mistake?

Lin Ju's thoughts were running rapidly in his mind, and it took him a long time to come up with an explanation:

"Ahem, that's right, Professor Tang. You also know this...the design of the rocket actually has a little to do with the Aramco Space Agency."

Seeing that Tang Weitian and others around him had expressions of "I see", Lin Ju continued to write:

"Actually, Xinyuan-1 was modified from the scrapped proposal of the Aramco booster. Considering that we had no experience, we made the most conservative changes in a hurry, just for fear of malfunction."

This explanation successfully deceived everyone, and it can be explained because the original design of Xinyuan-1 was not a rocket for satellites at all.

"I see, it is indeed the Aramco Space Agency. They have really rich design experience. The person who made the changes must not be very good at it. This change is too conservative."

"Yeah, such an excellent kerosene engine has been abandoned. It's really disrespectful!"

After Lin Ju personally admitted that the source of the technology was Ami, especially the people in the Sixth Academy were no longer calm, and their doubts about himself were reduced a lot.

After all, it is Aramco that landed on the moon half a century ago. It is reasonable for them to have such an advanced design. It is also in line with their arrogance and confidence to look down on the 120-ton kerosene engine.

Seeing that he had finally made things right, Lin Ju breathed a sigh of relief and quickly changed the subject, turning everyone's attention to the rocket launch.

At 10:55 a.m., 5 minutes before launch, the last round of self-inspection passed without failure, and Guo applied for Lin Torch to approve the launch procedure to proceed normally.

In the online live broadcast room, the five-minute countdown began to beat, and the number of video barrages increased rapidly and filled the screen.

At this time, the number of viewers on various major platforms has exceeded 200,000, but the most active ones are thousands of students from Nanjing University of Science and Technology.

After all, if the school relies on this to improve its focus, their diplomas will also rise with the tide.

Lin Ju glanced at the bullet screens floating on his laptop. They were all roughly "Southern Machinery Institute 666", "I am also involved in this satellite", "Like the seniors", "Come on China Aerospace", "Xinyuan Tractor Factory NO. 1" and so on, all looking forward to the successful launch of the rocket.

"60 seconds before launch!"

The transmitter tower's broadcast beeped.

"30 seconds before launch!"

"20 seconds before launch!"

At this time, all the onlookers understood that the final countdown was coming, and they counted silently in their hearts and stopped talking.

"10, 9, 8..."

"3, 2, 1, fire."

"Host ignition."

When the last sound fell, in the live zoom lens, a plume of white smoke first appeared from the bottom of the rocket, and then a bunch of flames expanded rapidly.

Before the tail flame expands and the rocket leaves the ground, the surrounding smoke almost covers the entire rocket body, giving people the feeling of smoke before explosion.

The onlookers who didn't know the truth were all nervous, but then the white pointed cone emerged from the smoke, and the arrow body behind it left the ground faster and faster.

At this time, the roar of the rocket engine reached everyone's ears. Although it was only a 120-ton engine, the powerful impact made people feel like an earthquake.

Xinyuan No. 1 rose rapidly in everyone's field of vision and flew steadily towards the sky.