Chapter 315: Solar sail concept

To put it bluntly, this thing is that the smaller the gravity loss, the better, so that the engine specific impulse disadvantage of the gas generator F-1 is basically completely avoided.
Because the second-stage kerosene engine flew for 2.5 minutes, it was basically thrown away, so the deadweight of the second-stage basically no longer exists.
Regardless of the design, the sooner the first and second stages are thrown away, the better. Under normal circumstances, the dead weight of the first-stage engine is the largest. However, the rocket in the design drawing is different. This is the largest second-stage dead weight.
At this time, the three-stage engine began to fall off, and the advantage of the comparison is gradually manifested. One advantage of the comparison is that it uses less fuel to achieve higher speeds.
The third-stage rocket is a hydrogen-oxygen engine with a 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 starts to operate, and the fourth-stage is also a hydrogen-oxygen engine, inheriting the speed brought by the third-stage engine's thrust, and flies directly to the low synchronous orbit.
The high and low synchronization orbits are determined by the distance from space to the ground.
Generally speaking, low geostationary orbits are the daily orbits of some weather satellites, spy satellites, and communication satellites.
This is because whether it is electromagnetic waves for communication or the various sensors and cameras mounted on spy satellites, the lower the distance from the ground, the better, but it should not be 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 China Space Station "Tiangong", and the Hubble Space Telescope.
Generally speaking, whether it is a low synchronous orbit or a high synchronous orbit, it will slowly fall into the atmosphere, but the time is different.
Therefore, equipment such as space stations in high synchronous orbits are generally equipped with engines to prevent them from falling into low synchronous orbits.
If the space station falls into a low synchronous orbit, it will be over, because the space station itself is very large, and the engine on the space station alone is not enough to push it back to a high synchronous orbit.
Therefore, the parts of the mining spacecraft need to be transported to the highly synchronized orbit, waiting for the next rocket launch, and assembled in space.
To be honest, Ye Fan’s mining spacecraft is more advanced than the space station. The mining spacecraft will start the electromagnetic propulsion engine and fly directly to the moon.
"Although this design is good, there are still many loopholes. For example, using ion engines to push into the air and then ignite in the air, then this is definitely a serious test for the stable attitude of the rocket."
"Yeah, Dr. Zhao is right. If it is ignited in the air, the rocket head is light and heavy. It is very likely that it will turn into a missile and hit the ground directly."
"What's more, the size of the ion engine is very small, with only the palm of the hand. If it is forced to provide thousands of tons of thrust, then the pressure of the engine itself on the material will increase, which is still a test for our existing materials. "
...
At this time, you were talking every word in the meeting room, and Su Ying did not think of these problems when he came up with this plan.
The reason she would say it here is to brainstorm and let everyone solve the problem. If it really doesn't work, then she can only change the plan.
"Mr. Ye, what do you think of this design plan?" Su Ying also cast her eyes on Ye Fan at this time.
"No, no, if I know how to design rockets, I'll go to the battlefield to draw sketches myself." Ye Fan also shook his head and smiled.
As the saying goes, there are specializations in the art industry, and professional things must be left to professional people.
With the black technology in Ye Fan's system, it is enough for him to design an epoch-making rocket, and it is also like the recyclable rocket of Musk's company.
However, if a company takes out one or two technologies, it can already be regarded as a sky-defying black technology, and three or four epoch-making black technologies can also be called the son of the heavenly choice.
If the black technology is thrown out one after another like dumplings, then it is not something that is not against the sky, but a monster.
Humans will not respect or worship monsters, they will only change ways to destroy them.
"It's just that I can 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 it?" Ye Fan looked at the crowd and said.
"Well, Mr. Ye, please speak." Su Ying also spoke.
After all, given the size of Ye Fan's Datang Technology, it is quite normal to have a little friendship with the Chinese Academy of Sciences.
They didn't even know that this was just an excuse for Ye Fan's nonsense. This was the engine "solar sail" he exchanged from the system.
"According to their new plan, I asked a few old professors and aerospace experts to optimize it~EbookFREE.me~ It is still in the experimental stage and can start production at Datang Heavy Industries next month."
Ye Fan spoke, let Origin connect to the holographic projection module on the conference table, and then displayed a new pattern.
"When will we humans fly out of the solar system has always been an issue of great concern to us. At present, the farthest spacecraft we have launched is Voyager 1, which is more than 20 billion kilometers away from us."
"But even so, the nearest star to us, Proxima Centauri, needs more than 70,000 years of flight time. Such a long time is completely unattainable for our life."
"So this is a new type of non-working fluid engine, called solar sail, also called light sail. It was first proposed by the famous astronomer Kepler four hundred years ago."
Ye Fan pointed to the text on the holographic projection, and everyone was watching attentively.
As experts and outstanding graduates in aerospace, they cannot say that they are omniscient and omnipotent, but they basically know a lot about these cosmic propulsion engines.
So they also know this solar sail, and it is not a new thing in the industry. However, this thing cannot be made at this stage, and it is useless if it is made.
Four hundred years ago, Kepler thought about the shape of a comet and proposed that sunlight can provide a kind of "pressure" to force the comet to become a long tail.
If this energy can be used, it may be used for interstellar navigation.
In 1978, Euler formally proposed the existence of light pressure, which was finally measured by Russian physicist Lebedev in 1901.