Otaku Engineer in Great Tang Dynasty

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"Are these fireworks?"

On the edge of the playground, Li Er stood beside Li Zexuan with his hands folded. He looked up at the splendid fireworks in the sky, and the surprise flashed in his eyes. Although he was the emperor of the world, this kind of dreamy and magnificent spectacle was also the first. See you again! He couldn't help muttering to himself.

Seeing this, Li Zexuan couldn't help but feel a little smug in his heart. How many people in the world can do this by shocking Li Er, a famous emperor of the ages?

But at the same time as he was proud, his eyes were still very vigilantly watching the students in the field who were running to light fireworks. After all, this thing exploded, and the consequences were still very serious, so he had to pay attention at all times. and ready to save lives!

"Marquis of Yongan, how can these fireworks rush into the sky so quickly?"

Suddenly, Li Er asked such a "little white" question. It seems that the sky has a very strong attraction for the ancients!

"Your Majesty, Qingque should know about this issue, so let him explain it to you!"

Li Zexuan bowed his hands and said.

"Oh? Qingque, do you know the reason?"

Li Tai, who was standing on Li Er's left, stood up excitedly when he heard the words, and replied:

"Father, as far as my sons know, the reason why this firework can quickly rush into the sky is related to the gunpowder in it! Once the gunpowder explodes, it will generate a very powerful thrust to make the projectile part at the top of the firework, Overcome your own gravity and fly into the sky quickly!

As for the projectile at the top, its fuze was ignited when it flew out of the pipeline. The length of the fuze was calculated by the mountain length, so every time it was guaranteed that it would just fly near the highest point and explode! This is what we see now! "

Li Tai, who used to be arrogant in the past, has now turned into a great leader in the field of physics. He explained the force analysis of fireworks and cannonballs to Li Er. Hearing Li Er, Empress Changsun, Li Chengqian, Changle and others were stunned for a moment. of!

"Thrust, gravity?"

Faced with these new terms, Li Er was a little caught off guard. Although he glanced at the physics textbooks of the academy, he only glanced at it and did not study it carefully; of course, what caught him even more was that his son only He only stayed in Yanhuang Academy for half a year, how could he know so many things that the Tang Dynasty did not have?

Seeing his father's face full of surprise, Li Tai's sense of accomplishment instantly exploded, just like some children show off in front of their parents and ask for compliments after knowing something amazing. Li Tai now belongs to this kind of performance desire. super strong person.

"Cough! Father, when it comes to gravity, it's actually..."

"Okay, okay! I roughly understand what it means!"

Li Er waved his hand and interrupted his son's further "science popularization". He is the supreme leader of a country after all, so he is disgraced by his son's "preaching"?

Li Tai had to shut his mouth angrily.

Chang Le, who was on the side, suddenly thought: "Brother Xiaoxuan, since this gunpowder can push the projectile up into the sky, can it send people to the moon?"

Li Er's eyes suddenly lit up, and he turned his attention to Li Zexuan. The experience of observing space with an astronomical telescope at Yanhuang Academy that night was unforgettable to this day. At this moment, Changle's suggestion made him a little bit moved.

Although Li Zexuan said that night, it would take at least a hundred years of technical accumulation to send humans into space, but what if there was a shortcut?

"Pfft~!"

Li Zexuan almost vomited blood when he heard the words. What Changle said was a bit similar to a rocket. I didn't see it. Although the little girl didn't have much contact with engineering, her idea was quite bold.

"Changle, although gunpowder is infinitely powerful and can push objects into the sky, once this thing is ignited, it will explode in an instant. It can only provide instant explosive power, and we cannot control its burning speed, so it cannot provide continuous thrust. Send heavy objects or human bodies out of the land under our feet!

In addition, with the current conditions of Datang, even if a person is sent out of the earth, there is no way to guarantee his survival in outer space! After all, there is air on Earth, nowhere else! "

Li Zexuan tried his best to explain in a language that Changle could understand.

"Oh!"

Chang Le thought about it for a while, and then nodded his head, seemingly incomprehensible.

But Li Er waved his hands and said, "Those who make big things don't care about the details! If you have the ability to send someone to the moon, just send it. As for whether that person can survive on the moon, you don't have to worry about it!"

There is always one obsession in Lao Li's heart, that is God! Even if it wasn't for him, the people under his rule would do it! This is something that the Three Sovereigns and Five Sovereigns, Qin Huang and Han Wu could not do!

To this end, make a little sacrifice, what does that count?

Li Zexuan rolled his eyes and didn't speak. He was too lazy to argue with Li Er about this matter!

What a sacred thing the aerospace industry is, even if the Tang Dynasty has the conditions to carry out manned spaceflight, as long as he is there, he will not allow anyone to come here!

Li Er knew what Li Zexuan was thinking at a glance, he shook his head, thinking that today was New Year's Eve, he didn't say anything to blame, but secretly said in his heart: This kid is still too kind!

. . . . . .

"Bang bang bang~!"

The sky of Yunshan is very charming tonight!

After the students in the first class finished setting off the fireworks, Li Zexuan asked the remaining guards of the academy to "come together". Before, four sets of fireworks were set off, and later, more than a dozen fireworks pointed to the sky!

One after another, colorful sparks flew up and down, blooming proudly in the air. Red, orange, yellow, green, blue, blue and purple, everything is complete, and the night sky is beautiful and graceful, and the earth is illuminated like day. This is really a fire tree and silver flowers never sleep, and fireworks are flying to welcome the New Year!

The people on the Yunshan Mountain and at the foot of the Yunshan Mountain have never stopped exclaiming from the 4th hour to the present. The vast majority of people rarely blink their eyes. They have completely conquered the beauty of the fireworks!

But tonight's fireworks lasted unexpectedly long, a quarter of an hour, a quarter of an hour, a quarter of an hour, a quarter of an hour, a quarter of an hour, and the bell of the ugly hour, but the fireworks on Yunshan did not stop at all. At the same time that everyone was hooked, they lamented again and again, because the neck hurts when I look up!

In the end, many people simply got some hay, spread it on the ground and lay down on their backs, while the wealthy children or masters of rich families who had the conditions would have people get mats or quilts and put them on the roof of the carriage, and people would just lie down. Go up, in this way, you can not only enjoy the fireworks in the sky, but also save your worry and effort!

And Li Zexuan, after watching the fireworks for a quarter of an hour, took his daughter-in-law and Lao Li's family to the top floor of the tower on the left side of Guanghua Building. Oh, to be precise, Li Er should have taken him there, because The tenth floor of the tower on the left here is the office of the dean of the academy, Li Er. Only Li Er has the key, but Lao Li has never been here before, and today is the first time!

Entering this "Dean's Office", a few people lay down on the sofa, and through the large floor-to-ceiling windows, they could see the fireworks over the playground while lying down, which was extremely comfortable!

After four hours of ugliness, all the fireworks were put out, and Li Er stretched his back. This New Year's Eve, he was very satisfied, and it could even be said that it was the most satisfying New Year's Eve night in his life!

Old Comrade Li was satisfied, and of course he wanted to show his gratitude to the courtier. I saw him stand up and say to Li Zexuan: "Tomorrow, oh, no, it's today, today's court meeting, I will temporarily lift your restraint order, you boy remember. Attend on time, if you are late or absent, hum~!"

After all, he took Chang Le, Changsun, Li Chengqian and others away, leaving behind a dull-looking Li Zexuan!

"Damn! Thief God! What did the young master do wrong? You want to punish me like this?"

For a long time, Li Zexuan pointed to the sky and cursed his mother.

Watching the new year tonight, does he still want to sleep in in the morning? Are you still attending a meeting? Participate in a hammer yo~!

That's right, Comrade Li thinks it's a reward, but Comrade Li thinks it's a punishment!

. . . . . .

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