"Student Chen Weixiang, meet Your Majesty! Meet the Queen! Meet ......"

As a student representative, Chen Weixiang was sent to the audience with several other good students.

The main thing is that the hot air balloon has flown away, and it is completely invisible, and you have to find something to do, otherwise hundreds of people will stand there in the cold.

Zhao Han nodded and smiled: "I have heard of your name, you are the son of Chen Zhenhui?" ”

Chen Weixiang replied: "The student is afraid, the student's father and son can make His Majesty care." ”

Chen Zhenhui, as the fourth son of the late Ming Dynasty, has always refused to be an official. After a few years, I couldn't help but want to be an official, so I came to the Hanlin Academy and successfully applied for the job.

Chen Zhenhui is a typical representative of "not eating Zhou Su", after the Manchu Qing Dynasty took Jiangnan, he went directly to the mountains to live in seclusion. Not only did he not want to be an official, he didn't even enter the city, and finally died of old age in the mountains. At this time and space, Chen Zhenhui at least entered the Hanlin Academy to engage in academic research.

Zhao Han encouraged: "Good students study and have great achievements in the future." ”

"Your Majesty Xie encouraged that students must be determined to learn." Chen Weixiang said happily.

Zhao Han looked at the girl standing in the front row again: "Are you Wen Shufen?" ”

"Exactly." Wen Shufen stepped forward to make a move, she didn't know much about etiquette, and her speech was not as elegant as Chen Weixiang.

Zhao Han praised and said: "As a woman, your family is poor, and you can be admitted to Jinling University hard, I know that it is not easy for you." A gentleman is like jade, so you will change your name to Wen Ruyu. A woman can also be a gentleman. ”

"Thank you, Your Majesty, for the name!" Wen Ruyu trembled with excitement.

A poor woman, who has studied hard and has been given a name by the Son of Heaven, will be a beautiful talk when it is passed on. If you add some legendary episodes, you can write a drama.

If it weren't for Jinling University's ban on idle access, from now on, I'm afraid that the threshold of the school would be trampled by the matchmaker.

Zhao Han talked to other students again, and everyone was happy.

Suddenly, Lu Tianxiang jumped out and knelt on the spot and kowtowed: "Your Majesty, when I learn five hundred words, you will let me be a female general, okay?" ”

As soon as these words came out, the audience fell silent, and then a slight snicker.

As for Lu Tianxiang, who is in charge, at first glance she is a barbarian woman, who doesn't know etiquette at all, and actually came to beg to be a female general. Many of the students tried to hold back their laughter, but it was very painful, and their cheeks were suffocating.

"Get up and speak, don't kneel." Zhao Han smiled.

Lu Tianxiang stood up, held his head high, and looked directly at the emperor. She was actually a little scared, but she wanted to show her heroism, hoping that the emperor would agree on the spot.

Zhao Han looked at this woman, and his first impression was that she was tall, and she was afraid that she was more than 1.7 meters with the naked eye. He asked, "If you want to be a female general, what are your skills?" ”

Lu Tianxiang said: "I can ride and shoot, and I can also use a knife, and I am very accurate in archery." ”

Zhao Han said: "If it's just these, then you can only be a pawn, and you have to rely on military merits to be promoted step by step." ”

Lu Tianxiang said: "I have made meritorious contributions, and Mu Kui of Huajiao Zexi was caught by the Datong army after I shot an arrow." ”

Zhao Han said: "This kind of merit can be a cavalry leader of ten people. ”

"It's only ten soldiers, let me command a hundred, okay?" Lu Tianxiang asked.

Zhao Han said: "What should you do to buy vegetables? Also bargaining. ”

"Then give me fifty soldiers." Lu Tianxiang really bargained.

This conversation made everyone happy, but they didn't dare to laugh out loud, otherwise it would be disrespectful to the emperor.

Zhao Han also found it interesting and said with a smile: "Wait until you learn a thousand Chinese characters." ”

Lu Tianxiang said: "Your Majesty, I heard that there is a General Zhang who only knows a few hundred words and becomes a division commander." Is it okay if I don't learn a thousand words, but only five hundred? ”

Zhao Han couldn't help but sigh: "Unexpectedly, General Zhang, who has been fighting in the north all the year round, has spread his prestige to the southwest. ”

"Your Majesty, is five hundred words okay?" Lu Tianxiang confirmed again.

Zhao Han couldn't cry and laughed: "Yes, when you know 500 words, you will come to see me with a waist card." ”

Zhao Han asked the female official to give a waist card, a one-time one, and took it back after meeting the emperor.

What the can it be?

More than 200 teachers and students were surprised, and they messed with His Majesty, and they really got the palace waist card.

"Thank you, Your Majesty, I will definitely try to be literate!" Lu Tianxiang burst out with infinite motivation for learning.

Fang Yizhi's father and son flew away for a long time and didn't come back, and Zhao Han didn't bother to wait any longer, so he immediately drove back to the palace.

In the middle of the afternoon, Fang Yizhi finally came back and ran excitedly to see Zhao Han.

After a report, Zhao Han said: "Write down the essentials of the hot air balloon and hand it over to the Ministry of Industry." All units of the Datong Army can be equipped with this object and used with a clairtelescope to observe the battlefield. Also, you have people continue experimenting, try other reliable fuels, and try to make the balloon fly as long as possible. It took more than a quarter of an hour to land, which is too short. ”

"Obey the order!" Fang Yizhi said.

Since it is useful, those who participate in the invention must be rewarded.

In particular, the students who participated in it will be able to enter the Physics Hall of the Qintianyuan Academy without taking exams as long as they want to graduate in the future.

Zhao Han asked, "Do you know why a hot air balloon can go to the sky?" ”

Fang Yizhi replied: "Buoyancy." ”

"Good!" Zhao Hanlong, Yan Dayue.

The French invented the hot air balloon, knowing what it was, but not why. Fang Yizhi has understood the principle, which is really commendable, and it seems that the physics research of the Qintian Academy has made rapid progress.

Perhaps, you can also pull out the seedlings to help grow.

Zhao Han said: "I have an idea. When the water is boiled in an iron pot, the steam can break the lid of the pot. Is it possible to make a machine that uses steam to drive the machine, just like a large spinning wheel driven by water power? This kind of machine is made, and the large spinning wheel does not need to be located at the water's edge, it can be used anytime and anywhere, and it can be spun and woven by burning charcoal. ”

Fang Yizhi pondered for a moment, feeling that it seemed feasible, but he felt clueless.

Zhao Han said: "You go back and think slowly." It is also possible to make this matter public, so that people of insight can think about it together. ”

Fang Yizhi left with confusion, but Zhao Han was quite looking forward to it.

For the steam engine, Zhao Han only knows that steam does work, and it is completely unclear how it works. It seems that the junior high school physics textbook has talked about it, but all of it has been returned to the teacher, so the physics teacher has not said thank you.

But it was said that Fang Yizhi returned home and meditated on the steam engine.

In the evening, Xu Zhengming came to visit, and opened his mouth and said excitedly: "Your hot air balloon really took people to the sky?" ”

"Didn't you know all the last time you took a cat or dog to the sky?" Fang Yizhi said.

Xu Zhengming scratched his head and said: "I always feel that the hot air balloon is unreliable, blown away by the wind, and cannot be controlled, what if it falls?" didn't think about it, and really took people to fly up and down again. ”

Fang Yizhi sighed: "Don't make flying chairs, let's make steam machinery with me." ”

"Steam machinery?" Xu Zhengming was confused.

So, Fang Yizhi began to talk about the basic principle, that is, boiling water is powered by steam.

Xu Zhengming was suddenly enlightened, can you make an oversized flying chair, and then boil water and use steam to drive it?

This cargo is all about helicopters.

As for the task given to him by Zhao Han, Xu Zhengming has made meritorious contributions again and improved the warp bed for spinning to thirty. It only took three months for Xu Zhengming to go from 20 to 30, and he felt that it was too simple, so he tried his best to transform the helicopter.

Fang Yizhi and Xu Zhengming gathered more than a dozen scholars and craftsmen to start studying the steam engine during the summer vacation.

Fang Yizhi is responsible for the overall idea, and Xu Zhengming is responsible for the specific design.

A few days later, Xu Zhengming drew a simple cylinder and pointed to the drawing: "Use a closed iron pot to boil water, steam enters it, and pushes the movable air plug to the right." The piston is then connected to the connecting rod to drive the flywheel to rotate. When the flywheel rotates half a turn, it pushes the connecting rod back, and the connecting rod pushes the piston to the left, expelling the exhaust steam from below. New steam comes in again, pushes the piston further to the left, and the flywheel keeps spinning. ”

"Seconds!"

Fang Yizhi was amazed by this design, and then asked questions: "The steam keeps coming in, pushing the piston to the left, and where does the flywheel get the strength to push the piston back to the right." ”

Xu Zhengming pointed to the drawing and said: "On top of the flywheel, install a slide rod, and the slide bar is connected to a valve that can be moved. When the piston drives the flywheel to rotate, the flywheel drives the slide bar, and the slide rod drives the valve, waiting to block the air pipe and prevent new steam from coming in. When the piston is pushed to the right and the exhaust gas is exhausted, the valve is reopened and new steam can enter. ”

Fang Yizhi was surprised: "How did you come up with it?" ”

Xu Zhengming said: "I want to go home." ”

As a well-known carpenter, Xu Zhengming is not only playing with helicopters, he has built many delicate objects in his hometown. Gears, connecting rods, and flywheels have long been used handy, and they are all made of wood.

The two of them gathered their assistants and continued to refine the design, selecting the materials for each part, and then having the blacksmith hammer it.

It only took a month for the world's first steam engine to be placed in front of Zhao Han.

"That's it?" Zhao Han was incredulous.

Xu Zhengming said: "Your Majesty is really smart, he can come up with a way to boil water and steam. ”

Are you despising me?

Zhao Han asked, "How long have you been designing?" ”

Fang Yizhi pointed at Xu Zhengming: "In four days, he took out the first set of drawings." ”

Zhao Han was speechless for an instant, and could only say, "Boil water and try it." ”

The boiler uses charcoal, and after boiling for a while, the connecting rod drives the flywheel to rotate rapidly, and it never stops.

It's that simple?

The famous steam engine was built in a month?

It's so casual!

Zhao Han felt that it was very unreal, he had known that this was the case, and he would have let people invent this thing a few years ago.

However, the efficiency of the first generation of steam engines is too low, and the cost of charcoal burning is probably not much better than that of hand-spinning fabrics. Moreover, the supporting steam spinning machine and steam loom should also be redesigned.

The steam engine ran for half an hour, and Zhao Han stood there and watched for half an hour.

Suddenly, stuck.

Xu Zhengming said embarrassedly: "A little problem, I'll open it and fix it." ”

Zhao Han pressed his excitement, spit out a breath of turbidity and said, "Go back and improve, make every effort to improve!" ”