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

"FGD, HGD?"

Lin Ju, who was still in the capital, opened his mouth slightly and looked at the reports reprinted in China.

On September 8, NACA announced that artificial gravity spacecraft will be used in the subsequent Artemis project and manned Mars missions, and the gravity can be freely adjusted between 0.3G and 1G.

Lin Ju was shocked when he just saw these contents, thinking that NACA had come up with some unknown black technology, but...

Connected by cables and freely adjustable, this way of generating gravity is too simple!

Are there really any astronauts who want to be tossed around in a little jar?

The Orion spacecraft is nothing more than a starship.

The report also included Musk's imaginary picture of two starships connected and rotating through ropes. Two more than one thousand tons of things are pulling each other, and the thickness of the ropes is at most about the same as a baby's forearm.

Apart from anything else, the astronauts who ride on this thing must have a high level of psychological endurance. The sight of tying their lives to a piece of paper is quite heartbreaking.

But the strange thing is that the Aviation Development Committee is quite optimistic about this plan.

Experts from the Fifth Academy immediately simulated their new-generation manned spacecraft. There were too many to say. A 100-meter flexible rope rotated at a speed of 2 circles per minute and produced a gravity of 0.45G without any problems. The most important thing was The cost is low.

Of course, there is no comparison between FGD and HGD in terms of style, but it is really easy to implement, and there will be no difference in the gravity feeling for astronauts.

The Aviation Development Commission even held a small discussion meeting to discuss whether there is any application space in the country.

The boss first concluded: "In the early stages of the development of the aerospace industry, both flexible and rigid gravity devices have certain limitations. Flexible devices require less technical power and capital, but rigid centrifugal devices are the future."

This has been unanimously approved by everyone. If HGD continues on this road, as the diameter becomes larger and the weight becomes higher, it will be the only way for future space cities, and it can even be used as a spacecraft for interstellar voyages.

Moreover, the rotating ring space composed of cabin sections is unmatched by flexible devices. The latter can only have two spacecrafts at most, and its potential is limited. Unlike the former, the whole body structure can evenly share the load, and it can be very large, tens of thousands of tons. It's all simple.

The Fifth Academy: "We have already participated in the Qianjin Project, there is no need to conduct FGD again."

"But FGD is very simple. We can start testing it next year, and maybe it can be used for landing on the moon."

"So what if it succeeds? Can it be used for the first moon landing? We don't have to wait. The Advance will be running by then."

"..."

At the headquarters of the Aerospace Development Commission, experts from various institutes will be sent out in turn to decide on certain things or conduct regular discussions with people from the Beijing Space Administration. This kind of small meeting can be more relaxed because it does not involve specific decisions. It is actually quite interesting. .

After a meeting, it was finally decided that FGD was too useless for the Qianjin space station, which was already preparing for joint operation, and gave up.

At the end of the meeting, Lin Ju, the boss, Academician She and several experts were left alone, as well as Serev, who had just flown over from Xinyuan.

The next thing they were going to discuss was the aerospace plane.

This is a project that both parties are hesitating about.

Now, the space agency is about to have a new generation of manned spacecraft + Long March 7 combination, and Xinyuan has H1 as the main personnel transportation vehicle.

Either way, each flight costs tens of millions.

The aerospace plane targeted by the space agency is an artifact that can enter space completely and then return without abandoning anything, and can reduce the cost of a single manned flight to less than 1 million.

Old Tengyun can't do it, and neither can new Tengyun.

Once a rocket is required, it must be a high-specific-impact liquid oxygen and liquid hydrogen rocket. The fuel cost alone is not only this amount, but also has a huge dead weight, making it difficult to store large quantities.

The problem of near space has now been solved. The WCR09 engine design is quite excellent and can carry a 100-ton aerospace aircraft to an altitude of 50,000 to 60,000 meters. The trouble lies in the remaining section.

To cross the 100km Karman Line and enter the low orbit of 200km, or 300 or 400km, a liquid oxygen and liquid hydrogen engine that works for a long time is required, which brings about a huge increase in difficulty and cost.

Single-stage entry into orbit has been a goal that countless generations of astronauts have been working on since the birth of rockets. From rockets to aerospace planes, they have been exploring this without success.

Although Xinyuan's XN90 spacecraft can be realized with the ultimate black technology NAPE, the cost is far from meeting the requirements.

Academician She looked at the equally young face next to Lin Ju and felt a little confused.

Serev was directly appointed as the vice president not long after graduation, but he was still a technical talent. It was really unacceptable. The management was okay, but technology, no matter what kind of genius, needs to be accumulated.

But his doubts could only be suppressed in his heart. After all, his superiors had instructions: don't say anything that is not conducive to unity.

It's Lin Ju's private company anyway, so do whatever you like.

Academician She: "We have a plan here, proposed by Academician Ma Weimin. He is an expert in electromagnetics and is currently busy with some confidential work, but he still has some suggestions:

He suggested that it might be possible to build electromagnetic acceleration orbits in high-altitude areas, with a length of about 50 kilometers, to accelerate space planes and small booster rockets of about 20 tons to ultra-high speeds, with the entire part not exceeding 40 tons, and then launch them above nearby space. The engine is in orbit. "

Serev:…

Lin Ju: (⊙ｏ⊙)

other people:……

Obviously, Academician Ma's plan is not realistic. For just a 50-kilometer-long acceleration track, and it has to be built in a high-altitude area, Lin Ju can already imagine trillions of construction funds.

Maybe Academician Ma is really busy, so he came up with a plan to make up the numbers...

Serev: "I think this solution is good for use on the moon. A 5-kilometer-long acceleration orbit can directly launch a manned spacecraft of about 5 tons or cargo of about 10 tons into a near-lunar orbit. Maybe it can be done before 2025. .”

Everyone understood this disguised statement that the plan was impossible to realize, and then the experts from the third hospital coughed and said:

"The investment cost of this plan is indeed a bit high. Compared with it, I still think that the Tengyun project has potential. Whether it is a two-stage entry into orbit or a complete orbit with a booster, it can be achieved with about 10 million if we work hard. .

Both options can carry at least ten people, so the cost of a single flight is about 1 million, which is low enough. Any lower, I think it should be something people should do in the future. "

Serev: "Well... (shaking his head)."

Serev expressed his disapproval twice, drawing all attention to the young man.

Of all the technicians on site, Serev was so young that one couldn't help but look down upon him.

But Serev himself felt that he was the same age as them and did not show any discomfort.

He raised a finger and pointed to the first question.

Got up late...