"We're back......"

Dagu took Jiang Qi home, yes, he brought Jiang Qi back for two reasons, one is because Jiang Qi is in every home in this world, where can he go?

Therefore, Jiang Qi did not go back, and Dagu also needed Jiang Qi because he didn't understand some things, such as the problem of nuclear radiation drive, so he didn't rush to send Jiang Qi back.

"Coming back?"

Dagu's mother is a very gentle and elegant person, and Jiang Qi actually made this evaluation at the first glance of this person.

And Da Gu's mother was stunned for the moment she saw Jiang Qi, and then asked more enthusiastically, "Are there guests?"

"Well, my friend, need to stay here temporarily. ”

Da Gu glanced at Jiang Qi, nodded, and said to his mother with a smile.

"I'm sorry to bother you. ”

Jiang Qi also immediately nodded at Da Gu's mother and said.

"Where's that?"

Dagu's mother seemed very hospitable, took Jiang Qi a pair of shoes, and then let Jiang Qi into the house to sit.

"I'll pour you a glass of water. ”

After Dagu's mother saw Jiang Qi sitting down, she immediately went to pour water, this enthusiasm made Jiang Qi feel a little flattered, and quickly said, "Don't bother, Auntie." ”

"It's nothing, it's a guest. ”

Da Gu's mother turned back to Jiang Qi and said a word, and then went to pour water.

"How does it feel?"

Da Gu sat down beside Jiang Qi, looked at his home, and said, "Although it's not big, it's very warm, and it's because of these that I fought for the end." ”

"Hmmm......"

Jiang Qi nodded, looked at Dagu's home, and was silent for a while before saying, "It's very good, it feels like home." ”

"Just get used to it. ”

Dagu took off his tie and said, "Do you want to eat something?"

"No need. ”

Jiang Qi looked at Da Gu with some tears and laughter, this mother and son are real......

"That's right, Dagu ......"

At this time, Dagu's mother walked over with a glass of water in her hand, and said to Dagu: "Asuka and I dream back, they came here once and stayed just now." ”

"Really?"

Da Gu sat up suddenly, looked at his mother in surprise, and asked, "Are they back?"

“……”

Jiang Qi's reaction was only on his face, and his face collapsed, but neither Dagu nor his mother saw it.

I dream of flying birds?

Jiang Qi muttered these two names in his heart, isn't this the two human bodies of Gaia and Dinah? Could it be that they are also one of the Eight Warriors?

And with Diga's human body, Da Gu knows, Dinah is easy to explain, and Da Gu is originally in the same universe, but Gaia is not at all.

In this way, it should be Ultraman from various planes and planes, gathered together to form eight warriors.

Of course, what Jiang Qi is looking forward to more is Nexus, just with the weakened version of Noah, it is enough for Jiang Qi to look forward to him.

Jiang Qi ...... Jiang Qi ......"

At this time, in Jiang Qi's ears, there was a sudden call from Da Gu, which made Jiang Qi come back to his senses, looked at Da Gu, and asked, "What's wrong?"

"I'm going to get together with them tomorrow, do you want to be together?"

I didn't expect Dagu to send such an invitation to himself, which was really beyond his expectations.

However, it would be bad for them to get together with old friends and let themselves intervene, but Jiang Qi still wanted to meet.

After hesitation, Jiang Qi said: "I want to go out tomorrow, you tell me what's interesting around here, I want to go and have fun." ”

"Huh?"

Dagu's mother was stunned for a moment and asked, "Aren't you Japanese?"

"Not really. ”

Jiang Qi shook his head with a smile and said, "I am Chinese, and I came here for various reasons." ”

"Chinese ah......"

Dagu's mother's eyes suddenly lit up and asked, "Do you know how to cook?" I mean Chinese food, I like to eat it very much, and I have learned it, but I can't make that kind of taste. ”

"Forehead ......"

Jiang Qi looked at Da Gu's mother, and didn't know what to say for a while, how could he let himself teach them to cook?

"Can't cook?"

Dagu's mother saw Jiang Qi with this expression, and thought that Jiang Qi couldn't cook, and looked a little disappointed.

"No, it's just not good. ”

Jiang Qi was a little modest, cooking, he was still good at it, and he wanted to be a chef at the beginning.

"Also, you can call me Little Ginger. ”

Jiang Qi doesn't like people to call "you" all the time...... You ......", I feel very unaccustomed, I don't like it, and I always feel that I have invisibly distanced myself.

"Okay, little ginger, can you teach me?"

Dagu's mother was a little embarrassed and said, "My food is not very good. ”

"That's right......"

At this time, Da Gu actually began to interject, with a look of deep understanding, and said to Jiang Qi: "It's really not good. ”

"Okay. ”

Jiang Qi said to Dagu's mother with a smile: "It's just that the teaching is not good." ”

"Well, thank you. ”

Dagu's mother was very happy and bent over Jiang Qi slightly, but Jiang Qi quickly avoided it.

"That, Auntie, China doesn't like this. ”

He can't accept this kind of gift from his elders, and this concept is deep-rooted.

"Hahaha......"

……

In the new world, Jiang Qi still has insomnia, and the reason is Dagu.

Jiang Qi was lying on the edge of the window, and glanced at Da Gu with resentment, this guy was in a hurry to write the manuscript overnight.

And this guy actually called himself up!

There is no problem with whether Jiang Qi eats or not, but if Jiang Qi wants to sleep, he hates people to wake up, because he likes to sleep, and he is very comfortable every time he wakes up.

"Look, how about this time?"

Da Gu's attitude, like a student, said to Jiang Qi, and then handed Jiang Qi the latest manuscript that he had rushed out of his hand.

"Oh......"

Jiang Qi took the manuscript and looked at it, Jiang Qi still knew relatively little about this kind of thing.

"Oh, ditch the traditional propulsion model and switch to chemistry?"

Jiang Qi looked at Da Gu's plan, and actually used this method? Although Da Gu was a genius, he didn't see very far.

In Jiang Qi's original world, the chemical propulsion method used to be part of the plan, but it was quickly ruled out because there were too many drawbacks.

Rocket engines generally have the following parameters.

Thrust, jet speed, specific impulse, total impulse, thrust-to-weight ratio.

A little explanation, but the thrust doesn't seem to need to be explained, the jet speed seems to be easy to understand, the specific impulse is the impulse produced by consuming the same amount of propellant, the total impulse is the impulse produced by the engine burning all the fuel, and the thrust-to-weight ratio is the ratio of the engine thrust to the mass of the engine.

The jet speed directly affects the specific impulse and total impulse, while the thrust-to-weight ratio is related to the structural design and material optimization of the engine.

The advantage of chemical rockets is that the technology is mature and the thrust is large.

For example, in the world before Jiang Qi's rebirth, the Soviet Union's RD-170 liquid oxygen kerosene rocket engine was now the rocket engine with the largest single thrust, with a thrust of up to 740 tons at sea level.

However, the fatal weakness of chemical rockets lies in the specific impulse, because chemical rockets use the chemical energy of fuel combustion, and the jet speed is inevitably not very large, which leads to the low "efficiency" of fuel (working fluid), that is, the impulse produced by consuming the same amount of fuel is small

To put it simply, the consequence of a small specific impulse is that you need to carry a large amount of propellant, but these propellants are extra "dead weight", and propellants are needed to accelerate this part of the propellant...

The last few hundred tons of rockets, more than a dozen tons are the mass of the rocket body structure, a few tons are satellites, and the rest is fuel...

For a certain fuel, it is difficult for chemical rockets to increase the specific impulse.

For example, in solid-fuel rockets, AP-HTPB (ammonium perchlorate-terminal alkylocarbon-terminal polybutadiene) fuel is used as an example, and if you want to increase the specific impulse, you can try to reduce the average molecular weight of the gas generated by the reaction, one of which is to increase the proportion of reducing agent so that the reaction produces carbon monoxide instead of carbon dioxide. However, the enthalpy of the reaction to generate carbon monoxide is obviously lower than that of carbon dioxide, and some of the chemical energy is still not used in carbon monoxide, so there is a pair of contradictions.

Therefore, Dagu's plan can be directly passed, because this promotion mode, although it is stronger than the traditional promotion method, is not much stronger.

Jiang Qi made some of the stakes clear to Da Gu, and Da Gu also discovered other drawbacks in his plan.

After all, this is Da Gu's plan, what are the drawbacks, Da Gu also knows it in his heart, but after Jiang Qi's explanation, these drawbacks are magnified in an instant, and he soon rejected this plan.

I didn't expect Jiang Qi to be able to see it so quickly, as if he had already done an experiment.

Looking at Da Gu like this, Jiang Qi shook his head, there was no choice but to introduce the plasma propulsion mode in the world of Mebius to Da Gu.

Ion rockets can be avoided because the energy that drives the movement of the working fluid molecules comes from electricity rather than chemical reactions.

As long as the input power is enough, his jet speed is completely capable of fast flight, which is amazingly larger than the impulse.

Of course, this is the most ideal result, the reality is not ideal, even if the Phoenix Nest uses this promotion mode, there is a risk of failure.

But even so, the specific impulse of this mode of propulsion is very impressive, at least much greater than that of chemical rockets.

"You're really amazing. ”

Da Gu listened to Jiang Qi's narration, there are really no words to describe it, this is simply a refreshing three views.

"Haha......"

Jiang Qi laughed dryly, blushing a little, when did he come to the routine of copying the public? But Jiang Qi didn't explain much, because it was unnecessary.

"What did you do before?"

Dagu really couldn't help it, and asked such a sentence, although he knew that it was not good to ask too much, but he couldn't help but be curious.

"Hmmm......"

Jiang Qi thought for a while, did he tell the truth or a lie?

"I said, if I used to protect the world, do you believe it?"

Jiang Qi said his identity, but he didn't actually say it, he just said his mission, whether he can understand it or not depends on Dagu himself.

"I believe it!"

Da Gu nodded almost without hesitation, of course he could understand, he actually knew so many things that subverted the three views, it must be an important member of an organization in the world, right?

"You...... Is it some secret organization in China?"

Da Gu suddenly lowered his voice and said to Jiang Qi mysteriously, his voice was very small, as if he thought there was some eavesdropping device in the room.

"Forehead ......"

Jiang Qi rolled his eyes, he didn't understand at all, Jiang Qi said helplessly: "If I really am a member of some organization, it is impossible to tell you this." ”

"Also to ......"

Da Gu thought for a while, and it was really like what Jiang Qi said, if it was really an organization, there was no need to talk so much to himself.

"Anyway, thank you. ”

Dagu took the manuscript, sat back in his chair, and began to write the report again.

“……”

looked at Da Gu, looked at the clock, it was already half past two, how could this guy be more energetic than himself?

However, Jiang Qi still didn't care much, although he was very unhappy.

"Dagu, can you tell me the story of when you were a child?"

Looking at the night sky outside the window, it was so beautiful, Jiang Qi thought of his past and suddenly asked.

"Well, what? What do you want to hear?"

Dagu only heard Jiang Qi call himself, but he didn't hear what Jiang Qi told him to do, so he couldn't help but ask repeatedly.

"I think Da Gu's childhood should be very happy, right?"

Jiang Qi lay on the window, did not look back, and his voice was very soft.

"Of course. ”

When Da Gu heard Jiang Qi's words, a smile appeared on the corner of his mouth, and he said: "I really miss the time when I was a child, I was carefree every day, I played with my friends, sometimes I had conflicts, and after an hour, I was reconciled." ”

For the first time, Dagu slowly put down the pen in his hand, and said with a nostalgic face: "At that time, I had the best relationship with Asuka, every day when a few of us came home from school, the first thing we did was to go to my uncle's house, to watch the latest "Ultraman", the three of us gathered together, while eating curry, while watching TV, every time I watched Ultraman beat the monster to the farts and pee, I was very excited. ”

"Sounds good. ”

Jiang Qi listened to Da Gu's words and showed a smile, feeling similar to his own, but he was more about studying, not because his parents forced him to tutor, but on his own initiative.

Because it is difficult at home, it is very reluctant to go to school, every time I see my parents are so tired, and I have to send myself to school, Jiang Qi is very distressed, so Jiang Qi does not want his parents' hard work to go to waste.

At that time, Jiang Qi knew that his only way out was to study, and only by studying could he get ahead, run to his parents, and live a good life by himself.

Therefore, Jiang Qi is more to make money by himself, and then all the money is used to study, so Jiang Qi has become the only one of them who has been admitted to Gaoyang University.

(Some of the above information is checked, such as the Soviet part, and some are made up, cough cough, I believe it all.) Haha, I'm still fairly confident in chemistry, even though I'm a liberal arts student...... Don't care about these details!!)

(There are 20 concepts equivalent to 985 in Gaoyang University, and Gaoyang ranks 11.) Well, you can arrange it casually, you are free to be first or penultimate at will, anyway, it will not interfere with the plot. ）4610