Speaking of which, when it comes to launch technology for launch vehicles, the United States is naturally second to none.

The United States has comprehensive technology, but the price is slightly more expensive, characterized by advanced technology, many types, and even air-launched launch vehicles, the most used and most reliable are the large launch vehicles Cosmos-5 and Delta-4.

The Cosmos-5 rockets of the Loma Company and the Delta-4 rockets of the Boeing Company are both two-stage rockets, and their common feature is that they both use a common core-stage rocket, and can be equipped with fairings of different sizes and different numbers of boosters as needed.

The two rocket design principles are the same: the development of flexible, mass-production-ready standard rocket components that can be quickly assembled and easily modified to customer requirements, with the aim of reducing labor, eliminating the need for extensive modifications before each mission, and making rocket manufacturing as easy as processing sausages.

As a result of the use of standard production lines and assembly lines of the launch process, the cost of launching has been reduced by 25 per cent, and the interval between launches has been reduced from the current weeks to a few days.

Although their carrying capacity is not as large as the Saturn-5 heavy rocket that launched the "Apollo" lunar landing spacecraft, they have higher technical content, lower cost, good reliability, wide range of application and short launch cycle.

However, at present, these two rockets mainly launch civilian or military spacecraft, and rarely launch commercial spacecraft because of their busy tasks and slightly more expensive prices.

The Cosmos-5 rocket is more solid and reliable than previous rockets such as the American "Hercules", and the assembly-line manufacturing process reduces the chance of human error. The core stage of the rocket has a diameter of 3. 81 meters, using liquid oxygen kerosene engine, with 14 configurations, low earth orbit carrying capacity of up to 25 tons; There is little preparation time for launch, and only 12 hours in advance can be sent to the launch pad.

In addition, the rocket can be launched without a large launch tower, with only one launch stand, and can be launched in windy conditions.

However, its first core stage uses a Russian-made RD-180 liquid oxygen kerosene engine due to its low price.

However, this has heated up the debate over whether the United States needs to buy rocket engines from Russia, because the United States' import of rocket engines from Russia will not only affect the development of the American rocket industry, but will also make the United States politically and militarily constrained by Russia.

Compared with the United States, the Russian side has advanced launch technology, but the price is much cheaper.

In recent years, Russia's annual space launch has always ranked first in the world's aerospace industry, mainly because the Russian large launch vehicle Proton-M is cheap, so it has contracted the launch business of many foreign commercial communication satellites.

From this point of view, Russia's oxygen-kerosene rocket engine development is relatively advanced, and has a price advantage, they use the RD-191 liquid oxygen kerosene engine, which can push 2 to 40 tons of cargo to low earth orbit, used to replace the old "Proton" series rockets, become the main force of Russia's future launch vehicles.

Currently, the Russian Angara-3 medium rocket can launch 14. 6-ton spacecraft, the Angara-5 heavy rocket can launch 24. 5-ton spacecraft, Russia also plans to develop an Angara-7 rocket with a larger launch capacity, which can launch a 40-ton spacecraft.

All components of the "Angara" series of carrier rockets are made of universal modular components as much as possible, which greatly improves the level of generalization, standardization and serialization of rocket development, and adopts a universal modular design, which can realize the mass production of key components and assemble different types of rockets according to needs, which not only reduces the cost of rocket research and development and production, but also accelerates the pace of launching serialized rockets.

In addition, Russia plans to develop a super-heavy launch vehicle for missions to the moon and Mars, which will first build a heavy rocket with a carrying capacity of 70-80 tons in low-earth orbit, and then gradually increase the carrying capacity of the rocket to 120 tons until 190 tons through modification.

Judging from the overall development of global space activities, in order to meet the growing demand for space development, the volume and weight of spacecraft such as artificial earth satellites, spacecraft, space stations, and space probes are getting larger and larger, so the launch vehicles that launch these spacecraft are required to develop in the direction of high thrust, high reliability, low cost and less pollution.

To this end, the United States and Russia, the two major space powers, are actively developing new high-thrust launch vehicles.

In the long run, the future launch vehicle will present a new look, with two major characteristics: one is the development of reusable launch vehicles, because the current launch vehicles are one-time use, the cost is very high, so the United States, Russia, Europe, India and Japan and other countries are stepping up the development of reusable launch vehicles.

The second is to develop heavy-duty carrier rockets, because the United States, Russia, and other countries have aimed manned space flight at the moon, asteroids, and Mars.

To this end, it is necessary to first develop a heavy carrier rocket that can launch a large-mass deep-space manned spacecraft.

Heavy-lift launch vehicles can also be used to build space solar power plants, etc., so they have broad prospects.

On the whole, the United States and Russia are slightly superior to other countries in launch vehicle technology, but the United States does not just use Russian technology and does not advance, and the United States is more advanced in terms of comprehensiveness.

"The technology of the American side is still more advanced, but what we need this time is not so precise, so we only need them to be able to safely send our people into the predetermined area, and this is done." Lin Xiao said to Han Ya.

"I just don't know, can Niya do this smoothly?" mentioned this, Han Ya, who knew a little about the inside story, was naturally very concerned, but she was still a little hesitant about the consequences of doing so.

"As long as the Russians' rockets are powerful, there should be no problem." Lin Xiao replied, "Niya's spaceship is only more affected in the earth's atmosphere, and if it breaks through this range, it will almost be able to recover a lot, and tens of billions of kilometers is not a big deal for her spaceship." ”

In order to break through the Twelve Heavens Chaos Array, the first problem is to find another active array eye, and to find this active array eye, relying on the technology on the earth, it is obviously not enough, so with the help of Nia's power, it is very crucial.

"You say, if you really open up the aura channel on the earth, what will happen?" Han Ya asked a little heartily, "When the time comes, will the cultivators be flying all over the sky, and will the human government be greatly impacted and become a mess?" In that case, the problem is big. ”

"No one can say for sure what will happen in the future, but it will never be worse than the present." Lin Xiao shook Han Ya's hand and said to her, "Besides, after all, we have the first-mover advantage, and before this matter, we can make a lot of preparations, which is enough to deal with everything in the future." ”

Although Lin Xiao said so, he also knew in his heart that this matter was not so simple.

After all, once the aura channel is opened, the question of the departure of the great lynx is a bit uncertain, for the great lynx that has reached the level of immortals, the only reliance on wanting to stay on the earth is that it cannot fly on the earth.

But if this passage is reopened, then the ensuing ascension problem may not be able to stop.

For the earth, which has lost the Great Lynx in charge, it is difficult to say whether Lin Xiao's strength can still suppress Huaxia's luck and ensure that no one can surpass him.

After all, there are endless amazing and brilliant people in this world, although it is said that Lin Xiao is indeed stained with the light of the second elemental god, but no one can guarantee that there is no second person, a third person, to get a greater adventure.

In this case, it is really not an easy task for the Secret Service to continue to maintain the balance and stability of the whole of China, and at the same time to suppress the covetousness of overseas countries.

But Lin Xiao himself knew that this channel had to be opened, otherwise, according to the current rate of resource consumption on the earth, or this world would not be able to support it for even a hundred years.

Rather than waiting for the destruction of the entire world, it is better to take advantage of the ability now and fight with all your strength to restore the earth's aura channel, so that the earth will not fall into a resource crisis, which is more appropriate.

Thinking that if he does this, he still occupies the name of righteousness, as for some of the negative effects brought about by this, it is acceptable, and as for who will stand out, it is also the will of God, and no one can be blamed.

Of course, Lin Xiao himself was still a little sure of whether he could continue to stand at the top of the pyramid of the entire human cultivator, after all, he had a first-mover advantage, and the existence of the second primordial god was a big cheater in itself.

If, under the premise of having so many convenient conditions, Lin Xiao was not able to advance by leaps and bounds and step all the way to the path of ascension, then he himself would not have the face to continue to say that he was the only cultivator on the earth.

After all, Lin Xiao has now reached the level of Jiedan, if he really has a large amount of aura support, his cultivation will inevitably advance by leaps and bounds, and he will cross the level of Yuan Shen in one fell swoop.

If it is really supported by a large amount of aura, then the next living and dead people are not a myth.

At that point, compared to the legendary immortals, it is actually not much worse.

Of course, the so-called life and death are just the kind of people who have just been seriously injured to death, but their souls are not dispersed, if they are really dead for many years and their bones are rotten, even if the gods come, I am afraid that they will not be saved.

Turning back time is just a legend, if someone really did this, I'm afraid the world would have been in chaos a long time ago?

"But no matter what, we have to prepare early." Lin Xiao said to Han Ya, "Now we need to search for a large number of seedlings suitable for cultivation, and when the aura channel is opened, we will at least have a considerable amount of reserve power in our hands that may become cultivators, which is the basis for us to continue to influence the general trend of the entire world in the future." ”

"It's hard to say...... Han Ya immediately showed a look of embarrassment when she heard this, "After all, no one knows what kind of person is suitable for cultivation." ”

Since they didn't know what kind of person was suitable for cultivation, of course, there was no way to find it.