And the other side.

On the northern plateau of the motor area.

There is the highest peak in Madagascar, Mount Malumukutru, which has a height of 2,876 meters.

However, this mountain peak, at this time, was partially flattened, and a tall building was built in the flattened area.

The entire high-rise building almost encloses the peak, and the height of the building on its surface is 1,000 meters, and the altitude of Mount Malu Mukutru has reached 3,622 meters above sea level.

This is where Homo sapiens' other space city is located, the Madagascar Space City.

With the help of the previous Homo sapiens underground works here, this base quickly built a large underground base group.

As mentioned earlier, the technical route of the Madagascar Space City is mass projectors, and there are no problems in terms of electromagnetic acceleration.

The real problem that plagues the mass projector is that the exit acceleration is too fast, and after hitting the dense atmosphere, frictional heat, shock waves, derived infrasonic waves, and sudden impact reaction forces are generated.

Although Homo sapiens has developed special rocket engines, special satellites and special instruments that can withstand high loads in previous Longgrand cannon projects.

However, the energy utilization rate of the Longgrand cannon is actually not high, you must know that its propellant is submetallic hydrogen, which is more than ten times more powerful than TNT.

This is also the reason why Egyptian Space City can engage in pulling projects.

The giant cannon launches the spacecraft, that is because it can be launched quickly, without considering the weather and the like, and directly lifts off by brute force.

And now the mass projector project that Madagascar Space City is working on, its chief engineer Su Changli naturally does not want to continue to follow the route of the Longelang cannon, he hopes to solve the conflict between the mass projector and the atmosphere.

Sam, the engineer in charge of designing the launch tower, reluctantly spread his hands:

"Chief engineer, the tower is already the limit, even if we use a variety of new materials, a high-strength structure with a height of 1,000 meters, basically can not increase the height."

Su Changli didn't care too much, after all, he didn't plan to build a launch tower that could go directly to the Kármán line.

Because this is unrealistic, even if new materials for Homo sapiens emerge one after another, they do not exist at this stage, and materials with a height of 100 kilometers can be built.

The Malumu Kutru Mountain Tower, its main function is to lay electromagnetic guide rails, the other is to resist the pressure of the underlying atmosphere, including the tower track, underground ring track, including the need to maintain subvacuum.

Since the orbit has a pipe radius of 50 meters, it needs to withstand very high atmospheric pressures, especially in the lower atmosphere.

Therefore, when building the tower, the mountain is chosen in order to raise the altitude of the hard building structure as much as possible.

Originally, the Nibora side was more suitable for this project, after all, there are mountains more than 8,000 meters high.

However, the safety of Nepal is not high, and it is very close to Tianzhu and the Far East, and there is not enough strategic hinterland to be suitable for this kind of project.

Homo sapiens didn't want to continue to irritate the two neighbors, lest they jump off the wall.

Therefore, the mass projector project fell to the motor area.

Su Changli turned his head to look at the other young man: "Baisha, what stage are you going on over there?" ”

"The airship has been designed, and all three test airships can fly to an altitude of 50,000 meters." Baisha called up the design concept model and directly holographic projection.

This very large airship, shaped like a doughnut, has a radius of 3 kilometers and is made up of 30,000 individual balloons, which use helium as the gas for the balloons.

For the airship, Su Changli only took a slight look, and what he really cared about was actually the connecting pipe between the airship and the tower.

The tall tower and the underground ring track are hard pipe designs.

The pipeline between the airship and the tower is a soft pipe design, which has very high requirements, very light weight, and sufficient compressive strength.

"Where's the progress of the soft pipes?"

"There's already a plan." Bai Sha's hand swiped across the holographic projection, and the picture suddenly turned into a pipe with a radius of 50 meters.

"In order for the hose to maintain a subvacuum, two problems had to be solved, one was that the pipe had to withstand the negative pressure of the atmosphere, and the other was a high-strength and lightweight material with a length of 43,000 meters," he explained. ”

Su Changli asked another question: "Hasn't the carbon nanotube laboratory produced results yet?" ”

Bai Sha shook his head: "No, they use biosynthesis technology, although they have made carbon nanotubes tens of meters long, but because the material characteristics and biosynthesis are not very suitable for this kind of carbon element, they have not been able to break through the length of 100 meters." ”

"Are carbon-based organisms carbophilic?"

Bai Sha nodded: "Yes, it is because of the carbon-philic characteristics that during the synthesis process, microorganisms are easy to insert some hydrogen and oxygen into the carbon chain, resulting in structural defects in carbon nanotubes." ”

"And how are you going to solve the material problem?" Su Changli asked with a headache.

Bai Sha is confident about this: "Although carbon nanotubes cannot be used, modified hard spider silk and high-strength steel wire can replace carbon nanotubes, at least tens of kilometers in length." ”

"Tightrope? Will the weight be too high, the weight of the airship is not high. ”

"Rest assured, the role of steel wire in the cable is actually only to enhance its upper tensile ceiling, and the weight is only about 132 tons."

Su Changli glanced at the payload of the airship, which was 3,172 tons, and immediately relieved himself.

"In order to solve the problem of hose collapse in sub-vacuum, the hose had to be taut, and then 16 cables were used as the core, plus a structural support ring every kilometer, to ensure that the hose did not collapse."

"The bulkhead material of the hose is made of high-strength film with low elasticity, and the steel wire in the cable and the metal structural support ring can be used as a positioning target for the magnetic field radar to avoid the spacecraft and the pipe wall touching during launch."

Su Changli touched his chin: "The spacecraft must not be too big, and it is best to control the radius below 15 meters." ”

"For the hose outlet of the ring airship, we will use a special disposable film to allow the spacecraft to directly hit through."

Disposable sealing film, this technology is not difficult, because America has a rotating gun project that uses a large centrifuge, which also uses this method.

As for the airship hose, it was also not pioneered by Homo sapiens, and there is a similar project on the Maple Leaf Country, that is, the project is still in the conceptual stage and has not attracted much investment.

It is also a wealthy Homo sapiens who has the ability to launch so many large-scale space projects at the same time.

After some discussion, Su Changli finally sorted out the progress of each group, and judging from the current situation, their mass projector is just around the corner.

He said to everyone present with satisfaction: "I have learned about the progress of each department, and I now announce the official launch of the dandelion project, and I hope you will continue to work hard." ”

Bang Bang Bang! Everyone applauded.

This mass projector, called the Dandelion project, is finally beginning to enter a state of full acceleration.

As long as the airship and hose are manufactured, and then the exclusive spacecraft design and manufacture are completed, then the project can start to be measured.

When this flower of the sky blooms, it will surely shake the whole world.

Compared to the vastness of the starry sky, human beings are too small.

For the constant shutdown of the great powers, Homo sapiens did not care at all.

If we don't work hard to open up now, human beings will only be trapped and die on the earth, and then annihilate in the long river of history like the previous earth overlords.

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(End of chapter)