Chapter 399 Wonders +2
And the other side.
On the northern plateau of Mada Island.
Here is the highest peak of Mada Island, Mount Marumukutlu, which is 2,876 meters high.
However, part of the mountain was flattened at this time, and a high-rise building was built in the flattened area.
The entire high-rise building almost wraps around the mountain, and its surface building height is 1,000 meters. At this time, the altitude of Mount Marumukutro has reached 3,622 meters.
This is the location of another space city invested by Sapiens Corporation - Motor Island Space City.
With the help of the underground project previously built by the Homo Sapiens Company, this base was quickly built into a large underground base complex through renovation and expansion projects.
As mentioned before, the technical route of Motor Island Space City is mass projector, and there is no difficulty in electromagnetic acceleration.
The real problem that plagues the mass projector is that the exit acceleration is too fast. After hitting the dense atmosphere, it generates friction heat, shock waves, derived infrasound waves, and sudden impact reaction force.
Although Sapiens had already developed special rocket engines, special satellites and special instruments and equipment that could withstand high loads in the previous Longram Cannon project.
However, the energy utilization rate of the Longgrande cannon is actually not very high. You should know that its propellant is submetallic hydrogen, which is more than ten times more powerful than TNT.
This is also the reason why the Khalij Space City in North Africa can carry out the La project.
The reason why giant cannons can launch spacecraft is that they can be launched quickly without having to consider weather or anything like that, and can just use brute force to launch them into space.
As for the mass projector project that Motor Island Space City carrying out, its chief engineer Su Changli naturally does not want to continue along the route of the Longgrande cannon. He hopes to resolve the conflict between the mass projector and the atmosphere.
Sam, the engineer responsible for designing the launch tower, spread his hands helplessly:
"Chief Engineer, the tower is already as high as it can be. Even if we use all kinds of new materials, the high-strength structure at a height of 1,000 meters cannot be increased in height."
Su Changli didn't care too much. After all, he had no intention of building a launch tower .
Because this is unrealistic. Even though Homo sapiens have endless new materials, at this stage there is no material that can be used to build a structure 100 kilometers high.
The Marumukutru Mountain Tower has two main functions: one is to lay electromagnetic guide rails, and the other is to resist the pressure of the underlying atmosphere. Both the tower track and the underground circular track need to maintain a sub-vacuum.
Since the radius of the track tube is 50 meters, the atmospheric pressure it needs to withstand is very large, especially in the lower atmosphere.
Therefore, when building high towers, high mountains are chosen in order to increase the altitude of the hard building structure as much as possible.
Originally, the Nepal branch was more suitable for this project, after all, there are mountains over 8,000 meters high there.
However, the Nepal region is not very safe and is very close to India and the Far East. It does not have sufficient buffer hinterland and is not suitable for investing in such large projects.
Sapiens Company also does not want to continue to provoke these two neighbors, lest they become desperate and do something desperate.
Therefore, the mass projector project fell to the Motor Island branch.
Su Changli turned his head and looked at the other young man: "Bai Sha, what stage are you at?"
"The airship has been designed. The three test airships can all fly to an altitude of 50,000 meters." Baisha called up the design concept model and projected it directly holographically.
This is a very large airship, shaped like a donut with a radius of 3 kilometers. It is composed of 30,000 independent sub-balloons and uses helium as the balloon gas.
Su Changli just took a quick look at the airship. What he really cared about was the connecting pipe between the airship and the tower.
The high tower and underground circular track are hard pipe designs.
The pipes between the airship and the tower are designed as soft pipes, which have very high requirements. They must be extremely light and have sufficient compressive strength.
“What’s the progress of the soft pipe?”
"We already have a plan." Baisha slid his hand across the holographic projection, and the image suddenly turned into a pipe with a radius of 50 meters.
Pointing to the pipe, he explained: "In order for the hose to maintain a sub-vacuum, two problems must be solved. One is that the pipe must withstand the negative pressure of the atmosphere, and the other is the high-strength and lightweight material with a length of 43,000 meters."
Su Changli asked another question: "Hasn't the carbon nanotube laboratory produced any results yet?"
Baisha shook his head. "No, they used biosynthesis technology. Although they produced carbon nanotubes that were tens of meters long, they were unable to break through the 100-meter mark because of the material properties and biosynthesis were not well suited to this single carbon element."
"Carbonophilic properties of carbon-based organisms?"
Baisha nodded. "Yes, it is because of the carbon-philic nature that during the synthesis process, microorganisms easily insert some hydrogen and oxygen into the carbon chain, causing structural defects in carbon nanotubes."
"Then how do you plan to solve the material problem?" Su Changli asked with a headache.
Baisha is confident about this: "Although carbon nanotubes cannot be used, modified hard spider silk plus high-strength steel wire can replace carbon nanotubes, at least tens of kilometers in length."
"Steel wire? Wouldn't it be too heavy? The airship can't bear a lot of weight."
"Don't worry, the role of the steel wire in the cable is actually just to increase its upper limit of tensile strength, and its weight is only about 132 tons."
Su Changli took a look at the airship's payload, which was 3,172 tons, and immediately felt relieved.
"In order to solve the problem of hose collapse in sub-vacuum conditions, the hose must be kept in a taut state, and then with 16 cables as the core, plus a structural support ring every kilometer, to ensure that the hose will not collapse."
"The bulkhead material of the hose is made of a low-elasticity, high-strength film. In addition, the steel wire in the cable and the metal structure support ring can be used as a positioning target for the magnetic field radar to prevent the spacecraft from touching the tube wall during launch."
Su Changli touched his chin and said, "The spacecraft must not be too large. It is best to keep the radius below 15 meters."
"For the hose outlet of the ring-shaped airship, we will use a special disposable film so that the spacecraft can directly crash through it."
Disposable sealing film, this technology is not difficult, because there is a rotary cannon project in America that uses a large centrifuge, which also adopts this method.
As for the airship hose, it was not invented by Homo sapiens either. There is also a similar project in the Maple Leaf Country, but the project is still in the conceptual stage and has not attracted much investment.
Only the wealthy Homo Sapiens company has the ability to invest in so many large-scale aerospace projects at the same time.
After some discussion, Su Changli finally sorted out the progress of each group. Judging from the current situation, their mass projector is just around the corner.
He said to everyone present with satisfaction: "Everyone, I have learned about the progress of each department. I now declare that the Dandelion Project is officially launched. I hope everyone will continue to work hard."
Clap, clap, clap! Everyone applauded.
This mass projector, named Dandelion Project, has finally begun to enter a state of full acceleration.
As long as the airship and hose are manufactured and the exclusive spacecraft is designed and manufactured, the project can begin actual testing.
When this flower in the sky blooms, it will shake the whole world.
Compared with the vast starry sky, human beings are too small.
Sapiens Company doesn't care at all about the constant closing of doors by the great powers.
If we don’t work hard to explore now, human beings will be trapped on the earth and then disappear in the long river of history like the previous overlords of the earth.
