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

But Christopher didn't dare to ask anyone to invite the senator out. He couldn't mess with a senator who was quite popular.

However, his anger did not last long. Soon a group of people in casual clothes also walked into the factory. As soon as they met, they took out the tags hidden in their collars.

"F-B-I! Please cooperate with our work!"

They went straight to the FAA senator who was yelling, picked him up and walked out without listening to any explanation.

Christopher and all the engineers in the factory watched all this with their mouths open, until a leader-like figure walked up to him, glanced casually at the congressman who was being carried out, and then gently patted Christopher on the shoulder and said:

"You are doing the greatest work in the world and no one can stop that."

"cocoa……"

"That guy? He will soon be mired in sex scandals and divorce lawsuits. Don't worry, the president will be paying attention to Endeavor's transformation plan every day."

The FBI left as quickly as they came. Christopher was stunned for a while before directing the continued disassembly of the nuclear engine, but he also had more confidence in the final success.

Of course, A105 has strong pollution when it starts up in the atmosphere, but other than that, the pollution residue is not very large. As long as the take-off and landing area of ​​the space shuttle is strictly limited, the harm is much lower than imagined.

However, the president's high attention still surprised him, so much so that he had a much better impression of the little old man, and even looked up John's Twitter account in his spare time.

Suddenly, a new Twitter message popped up:

"John: In astronomy, the solar system is divided into two regions bounded by the asteroid belt. We call the part outside it deep space.

Far away from the sun, all the worlds are cold and lonely, just like the universe. Going towards them means breaking away from the boundaries of the cradle and truly moving towards the universe.

Preview: January 20th, University of Pennsylvania, let’s fly to the stars together. "

…

"Mr. Zhu Bingguang, please check whether your helmet lock is pulled down, check whether the power connection of the wrist monitor is normal, check..."

Zhu Bingguang stood in the airlock of the Jiuzhang, conducting inspections one by one based on the intelligent voice in the earphones. His assistant and Fu Xiangjie were also doing the same thing.

It is now January 18, and the Tianmu-3 exploration mission has entered its third landing. The last three payload experts are composed of the 3D printing lunar soil team and the nuclear expert Rosen.

Three of the remaining six experts are stationed at the "Witu" space station and will return to the Tiangong Space Station in the next 10 days and then descend to the ground.

The nine payload experts will be withdrawn to Earth before January 26, and the main inspection mission of Tianmu-3 ends here.

But for the four professional astronauts, their work is less than halfway done.

The two professional astronauts who came down this time were Liu Ming and Fu Xiangjie. This was their first lunar landing mission.

The second fuel supply spacecraft and two permanent habitation modules will be launched into lunar orbit before February 2. They need to be filled with fuel and then properly placed before February 15 to build the first long-term habitation base on the moon. .

Although there are only two cabin sections, it can provide a living area of ​​150 square meters, which can accommodate up to 10 people. It is quite comfortable to station 4 astronauts.

Artemis 3's record of more than 8 days will be easily broken, and even a month is not a problem.

Therefore, Fu Xiangjie did not regard the time spent on the moon as valuable, which was completely different from Zhu Bingguang.

"Where is it? Where is Lao Yang's experimental field!"

When he got off the spacecraft, he didn't even have time to pack up his lunar soil 3D printing prototype, so he clamored to go see his opponent's results first.

The first landing mission that Yang Xinjun participated in lasted almost four days. He used a small number of samples made on the ground to lay a test site. The list of this landing mission also included checking whether the performance of the space cement after 15 days was significant. Variety.

It is not easy to use cement in space. First of all, the surface environment of the moon cannot be mixed with cement, water and sand in the open air like the earth. Furthermore, the lunar surface has an extreme environment with a maximum temperature of more than 100 degrees and a minimum temperature of more than 200 degrees below zero. Normal cement experiences After such a drastic temperature difference change, it is directly broken into powder.

Space cement needs to be used when the lunar surface temperature is in the range of -15 degrees to 75 degrees to ensure fluidity, and uses hydrocarbon organic fluids instead of water as the cementing agent. It is fluid at low temperatures and will not evaporate at high temperatures. Otherwise, When exposed to air, it either condenses into ice crystals immediately or evaporates.

The remaining mixing, laying and other processes also required the cooperation of special machinery. Yang Xinjun tried his best but could only pave an area of ​​five square meters.

Fu Xiangjie first watched Rosen place the white... tricolor flag before taking them to the test field. Anyway, the 3D printing test area had to be placed there for comparison.

When the lunar rover arrived at its destination according to the navigation, he did not see the flat land he imagined.

On the contrary, although the experimental field is generally flat, its surface is densely packed into palm-sized patches like fish scales, giving the impression that...

"Is this flattened with your feet?"

Zhu Bingguang commented unceremoniously, while squatting down and pinching the bump on the ground hard.

The color of the space cement after use does not seem to be different from the lunar soil itself, but after solidification, it does achieve the same effect as concrete, at least with his human power, he cannot cause any damage at all.

"Is this... really stepping on it with your feet?"

"No, I was just joking, don't take it seriously."

Zhu Bingguang interrupted his assistant and explained seriously:

"If you don't think about it carefully, think about it. With the moon's temperature difference of several hundred degrees between day and night, if it were paved on a flat piece of ground, how long would it last even if it could withstand the tension of thermal expansion and contraction?

The flat ground in the PPT is to show technical strength. It can be done but it does not mean that it should be done. Moreover, the gravity of the moon is very low. In order to prevent high-speed vehicles from skidding in the future, the lines formed can also increase friction. This old guy really thought Thoughtful enough, just a little worse than me. "

After listening to the previous words, Fu Xiangjie kept nodding and secretly sighing at Professor Zhu's broad-mindedness, but the last sentence immediately changed all the good impressions.

"But this method of stress relief is completely uneven. Paving roads is okay, but when manufacturing buildings... haha.

So he can only lay a flat piece of land here, and we have to build a... a wall here! "

Zhu Bingguang changed his mind promptly when he remembered that he had limited raw materials this time, but it still did not affect his complacent mentality.

Rosen, who only followed silently, said nothing, but secretly despised him in his heart.

He already knows that United Mining has shown a strong interest in building roads with nuclear bombs - to be precise, directly building the Great Plains. Once successful, the benefits will far exceed these cumbersome and inefficient methods.

Who knew that the hydrogen bomb created with the purpose of being a mass murderer really had such great potential in engineering applications?