To put it bluntly, the smaller the gravitational loss, the better, so that the engine impulse disadvantage of the gas generator F-1 is basically completely avoided.

Because the kerosene engine of the second stage is basically thrown away after flying for 2.5 minutes, the dead weight of the second stage is basically gone.

No matter how it is designed, the sooner the first and second stages are thrown away, the better, under normal circumstances, the first stage engine has the largest dead weight, but the design of this rocket is different, this is the second stage has the largest dead weight.

At this time, the three-stage engine began to fall off, and the advantage of specific impulse was gradually reflected, and one of the advantages of specific impulse was to achieve higher speeds with less fuel.

The third-stage rocket is a hydrogen-oxygen engine with high specific impulse, and then the third-stage rocket engine will send the entire rocket out of the atmosphere, but it cannot reach a low-synchronous orbit.

So at this time, the fourth-stage engine began to operate, and the fourth-stage was also a hydrogen-oxygen engine, inheriting the speed brought by the thrust of the third-stage engine, and flying directly to a low-synchronous orbit.

The high-synchronous and low-synchronous orbits are determined by the distance from space to the ground.

Generally speaking, the low-synchronous orbit is the daily orbit of some meteorological satellites, spy satellites, and communication satellites.

Because whether it is the electromagnetic waves of communication, or the various sensors and cameras carried on spy satellites, the lower the distance from the ground, the better, but not too low, otherwise it will fall.

The hypersynchronous orbit is the daily orbit of various equipment such as the space station, such as the International Space Station "Soyuz", the space station "Tiangong" in China, and the Hubble Space Telescope.

Generally speaking, both low-synchronous and high-synchronous orbits will slowly fall into the atmosphere, but the time is different.

Therefore, equipment such as space stations in high-geosynchronous orbits are generally equipped with engines to prevent them from falling into low-geosynchronous orbits.

If the space station falls into a low-synchronous orbit, it will be doomed, because the space station itself is very large, and the engine on the space station alone is not enough to push it back into a high-synchronous orbit.

So the parts of the mining spacecraft need to be transported to a high-sync orbit and wait for the next rocket launch to be assembled in space.

To be honest, Ye Fan's mining spacecraft is more advanced than the space station, and the mining spacecraft will start the electromagnetic propulsion engine and fly directly to the moon.

"Although this design scheme is good, there are still many loopholes, such as the use of ion engines to push high into the air and then ignite in the air, so this is definitely a serious test for the stable attitude of the rocket."

"Yes, Dr. Zhao is right, if it is ignited in the air, then the rocket is top-heavy, and it is very likely to turn into a missile and smash directly into the ground."

"What's more, the size of the ion engine is very small, only the size of a palm, if it is forced to provide thousands of tons of thrust, then the pressure of the engine itself on the material will become larger, which is still a test for our existing materials."

......

At this time, you and I were also talking in the conference room, and Su Ying didn't think of these problems when she came up with this plan.

The reason why she said it here is to brainstorm and let everyone solve the problem, if it really doesn't work, she can only change the solution.

"Mr. Ye, what do you think of this design plan?" At this time, Su Ying also set her eyes on Ye Fan's body. Let's have a book

"No, no, no, if I knew how to design a rocket, I'd go into battle and sketch it myself." Ye Fan also shook his head and said with a smile.

As the saying goes, there is a specialization in the art industry, and professional things still have to be left to professional people to do.

With the black technology in Ye Fan's system, it is enough for him to design an epoch-making rocket, and it is like a recyclable rocket like Musk's company.

However, if a company comes up with one or two technologies, it can already be regarded as a rebellion, and three or four epoch-making black technologies can also be called the chosen ones.

If the black technology is thrown out one after another like dumplings, then it is not a monster that is not against the sky, but a monster.

Humans will not respect and worship monsters, and will only destroy them in different ways.

"It's just that I can still talk to the professors of the Chinese Academy of Sciences, so I got a new cosmic power engine from them, do you want to hear about it?" Ye Fan looked at everyone and spoke.

"Well, Mr. Ye, please speak." Su Ying also spoke.

After all, with the size of Ye Fan's Datang Technology, it is normal to have a little friendship with the Chinese Academy of Sciences.

They didn't know at all that this was just an excuse for Ye Fan's casual nonsense, which was the engine "Sun Sail" that he exchanged from the system.

"According to their new plan, I asked a few old professors and aerospace experts to optimize it, and it is still in the experimental stage, and it can start to be put into production in Datang Heavy Industry next month."

Ye Fan spoke, letting the origin connect to the holographic projection module on the conference table, and then showed a new pattern.

"When we humans will be able to fly out of the solar system has always been a matter of great concern to us, and at present, the farthest spacecraft we have launched is Voyager 1, which is already more than 20 billion kilometers away from us."

"However, even so, Proxima Centauri, the closest star to us, would need to fly for more than 70,000 years, which is simply not enough for our lifespan."

"So this is a new type of work-free engine, called the solar sail, also called the light sail, which was first proposed by the famous astronomer Kepler four hundred years ago."

Ye Fan pointed to the words on the holographic projection, and then everyone looked at it intently.

As experts and excellent graduates in aerospace, they cannot be said to be omniscient about these cosmic propulsive engines, but they also know a lot about them.

So for this solar sail, they also know, and it is not a new thing in the industry, but this thing cannot be made at this stage, and it is useless to make it.

Four hundred years ago, Kepler thought about the shape of the comet and proposed that sunlight could provide a kind of "pressure" that forced the comet to form a long tail.

If this energy can be harnessed, it may be used for interstellar voyages.

In 1978, Euler formally proposed the existence of light pressure, which was finally measured for the first time by the Russian physicist Lebedev in 1901.