Dr. Mikoyan said confidently: "Don't worry, that plan has been simulated many times using supercomputers, and basically there will be no major problems."

"Doctor, Dr. Sen from the shipyard has arrived." The assistant shouted from a distance.

Dr. Mikoyan patted Wu Zhi on the shoulder: "I'll trouble you about the pier. I'll go over and discuss the space shuttle plan with Dr. Sen first."

"Okay!" Wu Zhi could only shrug his shoulders. He knew that these researchers were sometimes very stubborn.

Mikoyan and his assistant came to the underground area of ​​the base.

In a small office, he met Sen Shangzhe who made a special trip from the New Luzon Shipyard, and five other related engineers and researchers.

The group exchanged pleasantries for more than ten minutes, and then got straight to the point.

Sen Shangzhe spoke first: "Dr. Mikoyan, I have already seen the plan. I don't know much about the design of the space shuttle, but if it is the design of the enhanced structure, then I can still provide some help."

"Then trouble you, our plan is very simple, that is to enlarge the scale of the space shuttle so that it can withstand the impact of the metal hydrogen explosion." Dr. Mikoyan said while projecting the concept model.

Through holographic projection, everyone can see the model of the space shuttle.

"Is passivation of metallic hydrogen not considered at all?"

"It's really a simple and crude plan."

Mikoyan was not angry, but said with a smile: "This is also the most effective solution. The maturity of metal hydrogen passivation technology is still unknown, and I don't want to waste time."

But Sen Shangzhe thought about it seriously, because this thing fits his aesthetics.

They calculated the explosive power of metal hydrogen, and then substituted it into the current metal material. After simulation calculations, they adjusted the engine's explosion chamber and nozzle parameters little by little.

In order to balance the explosive power of metal hydrogen and the problem of preservation, they enlarged the size of the space shuttle to the extreme.

After discussing for more than three hours, I barely came up with a preliminary plan.

But looking at the various parameters of this plan, an engineer showed hesitation: "Can this thing really fly?"

The engineer said this mainly because the space shuttle is too big, with a launch mass of 3.2 tons when fully loaded, which is almost 8 times that of the largest launch vehicle, the Saturn V.

The quality of this thing is about the same as a Luzon-class amphibious assault ship.

The thought of it being a space shuttle is just insane.

Dr. Mikoyan reminded: "Don't forget the thrust and specific impulse of metal hydrogen."

Although the metal hydrogen of Homo sapiens belongs to sub-state metal hydrogen, not complete metal hydrogen, its specific impulse is still 3.2 times that of ordinary liquid hydrogen and liquid oxygen engines, reaching 1297 seconds.

Moreover, because Homo sapiens has a good foundation in the technology of explosive shock wave engines, the thermal efficiency of fuel can be further improved by using explosive shock waves.

According to the results of simulation calculations, the explosive shock wave engine they designed can further increase the thrust when using metal hydrogen as fuel.

The space shuttle designed by Mikoyan and others will carry 5000 tons of metal hydrogen as fuel, which is enough to push a space shuttle full of 3.2 tons into low-Earth orbit.

Of course, metal hydrogen can only be used as a one-time fuel, and there is no way to store it for a long time, so it can only be used in the stage of flying out of the atmosphere.

According to Dr. Mikoyan's design plan, the space shuttle does not need to stay in low-Earth orbit, or go to synchronous orbit, the moon and Mars, but as a carrying platform.

After flying out of the Karman line, you can directly launch the spacecraft it carries, and then the space shuttle turns around and returns to the atmosphere, returning to Space City.

The space shuttle of this design has a payload of about 1.2 tons.

The mass of dozens of international space stations can be transported to low-Earth orbit at one time. Unless Homo sapiens' space elevator project and mass catapult project can be successful, otherwise no launch vehicle at this stage can match the payload of this project.

Dr. Mikoyan no longer cares about the tens of tons of payload of ordinary launch vehicles. He thinks that if he wants to play, he must play with a big one.

After all, it is necessary to complete the Guigong Project before 2030. With the current small rocket alone, the transportation volume is simply a drop in the bucket.

Only this kind of super space shuttle can satisfy the space strategy of Homo sapiens.

The space business department, which is not short of money, also approved Dr. Mikoyan's super space shuttle project, allowing Harij Space City to complete the first experimental aircraft before the end of next year.

This is why he hastily sought engineers and researchers from other systems to help.

Now that he has assured the space business department, Dr. Mikoyan will naturally go all out to get the experimental machine out as soon as possible, and then ask the space business department to send money as soon as possible.

Because this project was carried out at the Suez branch, it was named the "Pull" space shuttle project, or "Pull project" for short.

Sen Shangzhe and others communicated in this base for more than a week.

During this time, they continued to refine various designs for the space shuttle.

For example, in order to maintain the ultra-low temperature maintenance system of the space shuttle and adjust the feathers of the wings, a lot of electric energy is needed, so two small thorium-based molten salt nuclear reactors were simply installed.

The other is the location of the spacecraft. After some simulation research, it was decided to place the spacecraft above the space shuttle.

In fact, it is similar to Lao Maozi's Blizzard space shuttle.

The reason for this design is mainly that the weight of the puller is too large, there is no way to erect it vertically, and it can only take a slope runway.

To run on the runway, the spacecraft must not be hung on the bottom, but can only be placed on the back of the space shuttle, so that the space shuttle can support the spacecraft.

Another system is the security system.

Considering the danger of metal hydrogen, Dr. Mikoyan decided to abandon the manned driving plan and adopt the unmanned driving mode after discussing with a group of colleagues.

Even the spacecraft is not intended to carry astronauts, who can first go to outer space on another launch vehicle, and then board the spacecraft from low Earth orbit.

Chapter 399 Spectacle +2

And the other side.

On the northern plateau of Mada Island.

There is the highest peak of Mada Island, Mount Marumukutlu, with a height of 2876 meters.

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

The entire tall building almost wraps the mountain peak, and the building height on its surface is 1000 meters. At this time, the altitude of Marumukutlu Mountain has reached 3622 meters.

This is where another space city invested by Homo sapiens——Moda Island Space City is located.

With the help of the underground project built by the Sapiens company here, through the transformation and expansion of the project, a large group of underground bases was quickly built.

As mentioned before, the technical route of Mada Island Space City is a mass projector, and there is no problem 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 force are generated.

Although the Homo sapiens company has developed special rocket engines, special satellites and special instruments that can withstand high loads in the previous Longerang cannon project.

However, the energy utilization rate of the Longerand cannon is actually not high. You must know that its propellant is submetallic hydrogen, and its power is more than ten times that of TNT.

This is also the reason why the Kharja Space City in North Africa can engage in pull projects.

The giant cannon launches the spacecraft because it can be launched quickly without considering the weather and the like, and it is directly lifted into the sky with brute force.

As for the mass catapult project that Mada Island Aerospace City is working on now, its chief engineer Su Changli naturally does not want to continue the route of the Longerang cannon. He hopes to resolve the conflict between the mass catapult and the atmosphere.

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

"Chief engineer, the tower is already at its limit. Even if we use various new materials, the high-strength structure with a height of 1000 meters basically cannot increase the height."

Su Changli didn't pay much attention to it. After all, he had no intention of building a launch tower that could reach the Karmen Line at all.

Because this is unrealistic, even if there are endless new materials for Homo sapiens, they do not exist at this stage, and materials that can be built at a height of 100 kilometers.

The Marumukutlu Mountain tower has two main functions, one is to lay electromagnetic guide rails, and the other is to resist the pressure of the bottom atmosphere, including the tower track and the underground circular track, all need to maintain a sub-vacuum.

Since the orbital tube has a radius of 50 meters, the atmospheric pressure it needs to withstand is very high, especially in the lower atmosphere.

Therefore, when building tall towers, high mountains are chosen, in order to increase the altitude of the hard building structure as much as possible.

Originally, the Nibro branch was more suitable for this project, after all, there are mountains with a height of more than 8000 meters there.

However, the safety of the Nibhor region is not high, and it is very close to Tianzhu and the Far East. There is not enough buffer hinterland, so it is not suitable for investing in such a large-scale project.

Homo sapiens doesn't want to continue to irritate the two neighbors, lest they jump the wall in a hurry.

So the mass catapult project fell to the Motor Island branch.

Su Changli turned his head to look at another young man: "Baisha, what stage have you reached?"

"The airship has been designed, and all three test airships can fly to a height of 5 meters." Bai Sha called up the design concept model and directly holographically projected it.

This very huge airship is shaped like a donut with a radius of 3 kilometers. It is composed of 3 independent sub-airbags and uses helium as the airbag gas.

As for the airship, Su Changli just took a look at it. What he really cared about was actually the connecting pipe between the airship and the tower.

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

The pipeline between the airship and the tower is a soft pipeline design. The requirements for this thing are very high, it must be very light, and it must have sufficient compressive strength.

"What about the progress of the hose?"

"There is already a plan." Bai Sha swiped his hand across the holographic projection, and the screen immediately turned into a pipe with a radius of 50 meters.

Pointing to the pipeline, he explained: "To make the hose maintain a sub-vacuum, two problems must be solved, one is that the pipeline must withstand the negative pressure of the atmosphere, and the other is the high-strength and lightweight material with a length of 4.3 meters. "

Su Changli asked another question: "Has the carbon nanotube laboratory not yet produced any results?"

Bai Sha shook his head: "No, they used biosynthesis technology. Although they produced carbon nanotubes with a length of tens of meters, they were unable to break through the length of [-] meters because of material properties and biosynthesis that were not suitable for this simple carbon substance."

"Carbonophilic properties of carbon-based organisms?"

Baisha nodded: "Yes, it is because of the carbon-loving properties that microorganisms can easily insert some hydrogen and oxygen into the carbon chain during the synthesis process, resulting in 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? Will the weight be too high? The weight of the airship is not high."

"Don't worry, the role of the steel wire in the cable is actually to enhance its upper tensile limit, and the weight is only about 132 tons."

Su Changli glanced at the payload of the airship, which was 3172 tons, and immediately felt relieved.

"In order to solve the problem of the collapse of the hose in a sub-vacuum state, the hose must be in a tight state, and then 16 cables are used as the core, plus a structural support ring every kilometer to ensure that the hose will not collapse."

"As for the material of the next wall of the hose, a low-elasticity high-strength film is used. In addition, the steel wire in the cable and the metal structure support ring can be used as the positioning target of the magnetic field radar to avoid contact between the spacecraft and the tube wall during launch."

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

"As for the hose outlet of the ring-shaped airship, we will use a special disposable film so that the spacecraft can directly crash through."

Disposable sealing film, this technology is not difficult, because America has a rotary cannon project using a large centrifuge, which also uses this method.

As for the airship hose, it was not created by Homo sapiens. There is a similar project in Maple Leaf Country, but the project is still in the conception stage and has not attracted much investment.

That is to say, the Homo sapiens company with deep pockets has the ability to invest in so many large-scale aerospace projects at the same time.

After some discussions, Su Changli finally sorted out the progress of each group. Judging from the current situation, their quality projectors are just around the corner.

He said to everyone present with satisfaction: "Everyone, I have learned about the progress of various departments. I am announcing the official launch of the Dandelion Project. I hope everyone will continue to work hard."

Clap clap!Everyone applauded too.

This mass catapult named Project Dandelion finally began to enter a state of full acceleration.

As long as the airship and hoses are manufactured, and then the exclusive spacecraft design and manufacture are completed, the project can start actual testing.

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

Compared with the vast starry sky, human beings are too small.

Homo sapiens doesn't care about the continuous closing of the great powers.

If we don't try our best to develop now, human beings will only be trapped and die on the earth, and then, like the previous earth overlords, they will be annihilated in the long river of history.

Chapter 400 99.41%

7 month 24 day.

Li Qingye left the Luzon Islands and came to a manor on the Shan plateau to escape the summer.

Sanzibarda Leyal came over with a matcha ice cream: "Sir, it's almost time for lunch."

Li Qingye, who was immersed in the internal briefing, his eyes still stayed on the laptop: "What do you eat?"

"Cantonese-style roast goose, deep-fried bread worms, fried bitter gourd with eggs, fried celery with cashew nuts and shrimps, pasta with creamy mushrooms, braised money ham with chicken fir mushrooms..."

Sanchibadah Leyal added: "There's also passion fruit juice, soda and lotus mist."

"Thanks a lot."

"It's my honor." Sanzibada Leal's cheeks flushed slightly.

Soon.

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