Basic knowledge: Knowledge of high school math is required.

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Having dinner with Jin Xiluo, there was no way to discuss the "extraterrestrial time difference effect" anymore, but the young rocket expert put forward many requirements for the payload part that An Chen was responsible for.

At the dinner table, Jin Xiluo kept saying that the load part was too heavy, which led to the inevitable getting bigger and bigger of the propulsion rocket, but if it became bigger, the cost could not be reduced, and when the cost was high, the budget was not enough...... The design of the satellite control group is perfectly stuck within the budget, but the use of cheaper but heavier equipment for the sake of the budget increases the cost of the propulsion rocket even more.

This is also easy to understand, according to Tsiolkovsky's formula V=V0ln(m0/mk), it is known that the jet speed of the rocket engine V0 is on the order of E0km/s, so in order for the single-stage rocket speed increment V to reach the order of E1km/s, ln(m0/mk) must have at least one digit. Assuming V/V0 = 5, this single-stage rocket can deliver less than 1% of the total mass of payload. If the part that is actually sent to the sky, including the payload and other structures, can be 5 tons, this rocket design means that at least 500 tons of fuel needs to be consumed, which is that the family really has a mine and can't stand it.

Therefore, it is necessary to adopt the method of multi-stage rocket propulsion, accelerate in sections, and abandon the structure of each stage after the acceleration of each stage of the rocket, and reduce the m0/mk of each acceleration stage. However, while this saves fuel, it increases the cost of the propulsion rocket itself, and also exponentially increases the complexity of control during the launch phase of the rocket.

So you can't pile up fuel, and you can't subdivide the acceleration section too much. In particular, this time, the "long-distance-3" rocket has to send people to the sky, and the maximum acceleration time that people can withstand is very limited, so no matter how you change it, you have to take it easy.

Therefore, the research and development of the launch vehicle group has been in a bald state, Jin Xiluo feels that the top of his head is getting lighter and lighter, since he entered the core team of the Emperor Sky Shield, he will lose his hair every time he takes a shower and block the sewer.

An Chen comforted Jin Xiluo with "understanding" on the surface, but in his heart he thought a little unkindly: Seeing that he was still in the mood to spread gossip, probably the pressure of the launch vehicle crew had not yet reached the limit of their capabilities. In this way, she could have designed the payload here to be a little larger, so she might as well bring all the crop seeds that she was hesitant to bring.

However, Jin Xiluo also has a score in his heart, he knows that he must not tell 100% the truth to people who are engaged in research.

People who do propulsion technology want to push things as light and small as possible, but people who do space experiments want to send larger and more equipment and samples, which is the fundamental contradiction caused by different needs.

However, compared to An Chen, who is in charge of the satellite control team, Michelin Marina and Ol Clara are the two guys who make Jin Xi the most uncomfortable. One of them wants to launch a larger and more navigation satellite, and the other wants to launch a larger and more strategic satellite, and they have more requirements than the long-haul-3 manned space program.

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After eating, Jin Xi went to the rocket structure team to find Leroy Caspar. An Chen took Ji Wanxing to the bee stable on the top platform for a walk, and by the way, he helped the hornets resting in the bee stable.

In their natural state, wasps usually bathe in water sources at noon and then dry in the sun. However, the top floor of the Sky Shield headquarters could not provide a wide water surface, so a wasp shower system was installed. Hornets also bathe themselves when no one is around, but it is happier to have someone to help them wash.

Many of the employees of Sky Shield go to the bee stable to wash the hornets during their lunch break. The hornet's aerobic metabolism is stagnant during the lunch break, so the mood will be relatively peaceful, even the queen bee can directly get started, which is why many people would rather compress their meal time to wash the wasp.

Of course, An Chen didn't go to the bee stable to touch the queen bee. Mar, the queen bee of the Emperor Sky Shield Transport Team, has the best relationship with Yan Qilan, as long as Yan Qilan agrees, she will have no problem riding Mar to the sky. She didn't want to bathe Kuroko - Kuroko didn't need anyone to help him take a bath, and as soon as the shower was turned on, he would inevitably grab the best spot, and then throw all the washed sewage on the other wasps.

An Chen's plan was nothing more than to take advantage of the hornets of the transport team to go to the shower area to take a bath, and enter the nest room of the queen bee larvae to steal some royal jelly.

This may not be ethical, but morality cannot be eaten as royal jelly. And although the law prohibits the private harvesting of royal jelly, it is only forbidden to directly extract royal jelly from the drone's honey sac, which is actually achieved by prohibiting the sale of the central anesthetic used by the wasp for extracting royal jelly. As for the royal jelly that has been spit out and fed to the larvae, even if you want to prohibit the collection, you can't do it.

An Chen hid the ear washing ball in her pocket, and while the adult wasps were not there, she pulled Ji Wanxing and pretended to be just looking for her hornet, and sneaked into the nest area of the transport team.

The rest area of the bee stable still retains the hexagonal structure of the wild hornet's hive, and each hive chamber is built by the hornets themselves with a composite material using beeswax as a binder. In addition to building enough nests for the members of their colony, they also build a lot of resting rooms for the occasional hornets like Kuroko. This is not found in wild wasps, which tend to be very xenophobic and generally do not allow out-of-colony hornets to settle in their nests.

The nest chamber where the queen bee larvae live has a white trapdoor that the queen bee's mates built to prevent other wasps from putting the drone larvae in to eat the queen balm. Although drone larvae are "special members" of a colony, like queen bee larvae, drone larvae are haploids that only carry the genes of the current queen bee and are not related to the spouse of the current queen bee. As a result, adult drones in a colony do not actively take care of the drone larvae and naturally do not feed them royal jelly.

This beeswax trapdoor can stop a hornet, but it can't stop a human with nimble fingers. An Chen lifted the trapdoor with a little force, and was able to pass sideways through the gap underneath. When I entered the nest of the queen bee larvae, I saw a few white and fat larvae lying lazily on the cashmere cushion, their throat sacs bulging, filled with honey and royal jelly that had just been fed at noon.

"Ann...... An Chen...... Isn't that right? Ji Wanxing followed her in and asked with some concern.

"Well, I'll get some." An Chen waved her hand to relax.

Anchen pinched the head of a larva, pinched the ear wash ball and inserted it into its mouth, and slowly released the mixture from the larval pharyngeal pouch into the ear wash ball. She then squeezed the honey and royal jelly from the ear wash into the glass jar she carried with her, and then went to "pick" the next larva......

It wasn't until her glass bottle was full that An Chen spared these poor queen bee larvae and drilled out of the queen bee larvae's nest room with Ji Wanxing.

She was about to reset the white trapdoor when the drones of the Sky Shield convoy returned to the hive area after bathing, and when they saw someone coming out of the queen bee larvae's nest, they immediately pounced on it.

Ji Wanxing reflexively pulled An Chen to run in the opposite direction, but how could a person outrun with his legs than a hornet could fly. Seeing that the three drones, which together weigh enough to weigh one ton, were about to reach their eyes, a large black wasp suddenly jumped in front of the three drones, spread its wings with a wingspan of more than six meters, and let out a terrifying tremor sound.

The three jasper drones were frightened by the black eagle hornet, which was nearly twice their size, and after reacting, they realized that they couldn't afford to be provoked, so they had to silently let Kuroko and the two human thieves out of their nest area.

An Chen looked at the three little grievances that succumbed to the "force" of the sunspot with some guilt, but still took out the glass bottle containing the honey-diluted royal jelly in front of them and took a sip.

Kuroko watched her drink the food sucked out of the queen bee larvae's throat sac, probably wondering why humans like to drink "milk" that only larvae drink.