“FGD，HGD？”

Lin Ju, who was still in the capital, opened his mouth slightly, looking at the report reprinted in China.

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

Lin Ju, who had just seen these contents, was shocked, thinking that NACA had come up with some unknown black technology, but the result was ......

The rope is connected and adjusted freely, and the way of generating gravity is too simple!

Will there really be an astronaut who wants to stay in a small jar and be thrown around?

The Orion spaceship is just that, what the hell is a starship.

There is also an imaginary picture of Musk's two starships rotating through a rope cable, two more than 1,000-ton things pulling each other, and the thickness of the rope is about the same as a baby's forearm at most.

Not to mention anything else, the psychological endurance of the astronaut sitting on this thing must be passed, and tying the small life to a thin rope paper makes people sweat when they look at it.

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

The experts of the Fifth Academy immediately simulated their own new generation of manned spacecraft, and they didn't dare to say that 100 meters of flexible rope cable, rotating at a speed of 2 revolutions per minute, produced 0.45G gravity without any problems, and the most important thing is that the cost is low.

Of course, in terms of style, FGD is not comparable to HGD, but it is really easy to achieve, and the gravity perception given to astronauts will not make any difference.

Even the Aviation Development Commission held a small discussion meeting to discuss whether there is any application space in China.

The big guy first concluded: "In the early stage of the development of the aerospace industry, both flexible and rigid gravity devices have certain limitations, and flexible devices have less requirements for technical strength and funds, but rigid centrifugal devices are the future." ”

This was unanimously agreed by everyone, and the HGD road has been going on, with larger diameters and heavier weights, it is the only way for future space cities, and can even be used as a spaceship for interstellar voyages.

Moreover, the rotating ring space composed of the module is also incomparable to the flexible device, the latter is at most two spacecraft, the potential is limited, unlike the former, which can evenly share the load of the whole body structure, which can be very large, tens of thousands of tons are very simple.

Fifth Academy: "We have already participated in the Forward Plan, and there is no need to engage in FGD again." ”

"But FGD is very simple, we can do the experiment first next year, maybe we can use it on the moon."

"What if it succeeds? Can the first moon landing work? It's not like to wait, the Advance has already been running at that time. ”

“……”

At the headquarters of the Aviation Development Commission, experts from various academies will be sent out in turn, and the people of the Beijing Space Bureau will jointly decide certain things or conduct regular discussions.

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

At the end of the meeting, Lin Ju, the big man, Academician She and a few experts stayed alone, as well as Seryov, who had just flown over from Xinyuan.

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

It's a project that both sides are hesitating about.

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

Either way, each flight costs tens of millions more.

The space plane in the space agency's target is the kind of artifact that can enter space and return without abandoning anything, and can reduce the cost of a single manned flight to less than 1 million.

The old Tengyun can't do it, and neither can the new Tengyun.

Once the participation of the rocket is required, it must be a liquid oxygen and liquid hydrogen rocket with high specific impulse, and the fuel cost alone is not only this amount, but also the dead weight is extremely large, and it is difficult to store a large number of vehicles.

For the adjacent space has now been solved, the WCR09 engine design is quite good, and it can fly to an altitude of 50,000 to 60,000 meters with a 100-ton aerospace aircraft, and the trouble lies in the remaining section.

To cross the 100km Kármán line and enter the 200km, or 300 or 400km low orbit, it takes a long time to work with liquid oxygen and liquid hydrogen engines, which brings a great increase in difficulty and cost.

Single-stage orbit, this is the direction that countless generations of astronauts have been working on since the birth of rockets, from rockets to aerospace planes, they have been exploring, and they have not succeeded.

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 young face next to Lin Ju, and couldn't help but have some doubts in his heart.

Not long after Seryov graduated, he directly served as vice president, but he is still a technical talent, which is really unacceptable, and the management is fine, but technology, no matter what kind of genius, needs to be precipitated.

But his doubts can only be suppressed in his heart, after all, his superiors have instructions: if it is not conducive to unity, do not say it.

Anyway, it's Lin Ju's private company, what should I do if I love it.

Academician She: "We have a plan here, which was proposed by Academician Ma Weimin, who is an expert in electromagnetic and is currently busy with some confidential work, but there are still some suggestions:

He suggested that it might be possible to build an electromagnetic acceleration orbit at a high altitude of about 50 kilometers, accelerate a 20-ton aerospace plane and a small booster rocket to ultra-high speed, no more than 40 tons in the entire section, and then start the engine into orbit above the adjacent space. ”

Seryov: ......

Lin Ju: (⊙o⊙)

Others: ......

Obviously, Academician Ma's plan is not realistic, just a 50-kilometer-long acceleration track, but also 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 threw a plan out to make up the numbers......

Seryov: "I think this scheme is good for the moon, a 5-kilometer-long acceleration orbit, directly hitting a manned spacecraft of about 5 tons or about 10 tons of cargo into the near-moon orbit, maybe before 2025." ”

Everyone understood the meaning of this disguised plan that it was impossible to realize, and then the experts of the Third Academy 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 the second stage into orbit or the overall orbit with the booster, hard work, about 10 million can be done.

Both options can bring at least ten people, so the cost of a single flight is about 1 million, which is low enough, and no matter how low it is, I think it should be what people should do in the future. ”

Seryov: "Hmm...... (shakes head). ”

Seryov twice expressed his disapproval, leaving everyone's attention focused on the young man.

Of all the technicians at the site, Seryov was too young to be despised.

But Seryov himself felt the same age as them, and did not make any uncomfortable moves.

He held up a finger and pointed out the first problem.

Woke up late......

(End of chapter)