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"..."

All the teachers and students in the school exclaimed, including Lu Tianxiang, the chieftain's children were even more shocked, thinking that Fang Yizhi must have invited the gods.

"It's not asking God," Meng Tai shouted in Yi language, "it's His Majesty who is casting a spell! Just now His Majesty let this thing go up into the air, and this thing went up into the air. Long live your majesty, long live your majesty!"

Fei Rulan and the other concubines were quite nervous sitting on the stage, their eyes fixed on the hot air balloon, for fear of falling and killing them.

"Father, I also want to go to heaven!" Zhao Kuanghuan suddenly felt that his pony was not attractive enough.

The hot air balloon was still climbing slowly until it reached a height of 600 meters, and was blown by the wind towards the north.

The common people in Nanjing also raised their heads to watch the commotion, shouting out all the people in the house to greet their friends and companions.

In the previous experiments, the hot air balloon was relatively small, but this time it was a big one with a diameter of 13 meters!

"It's amazing!" Fang Weiyi praised with a folding fan in his hand.

Fang Weiyi is Fang Yizhi's second aunt. She is 59 years old and is a famous female poet and painter all over the world.In addition, he is well-versed in Chinese and Western cultures, and studied mathematics and physics very early. He used to teach physics in a girls' middle school, and is now specially appointed as a professor at Jinling University.

Twenty or ten minutes later, the hot air balloon flew over the Yangtze River and landed slowly in the farmland several miles away.

Some farmers were harvesting rice, they all stopped their work and looked at the thing in the farmland in a daze.

Chapter 515 [Steam engine? 】

"Student Chen Weisong, my majesty! My empress! My..."

Chen Weisong, as a student representative, was sent to the stage to have an audience with several other good students.

The main reason is that the hot air balloon flew away and was completely invisible. There must be something to do, otherwise hundreds of people would stand there in silence.

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

Chen Weisong replied: "The students are terrified, and the father and son of the students can actually make His Majesty worry about it."

As the fourth prince of the late Ming Dynasty, Chen Zhenhui always put on airs and refused to be an official.After several years of service, I couldn't help but want to be an official, so I came to the Imperial Academy and successfully applied.

Chen Zhenhui is considered a typical representative of the kind of "not eating Zhou millet". After the Manchu Qing 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.In this time and space, Chen Zhenhui at least entered the Imperial Academy to do academic research.

Zhao Han encouraged and said: "If you study well, you will have great achievements in the future."

"Thank you for your encouragement, Your Majesty, the students must be determined to learn." Chen Weisong said happily.

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

"Exactly." Wen Shufen stepped forward and bowed, she didn't understand etiquette, and her speech was not as elegant as Chen Weisong.

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

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

A poor girl, who studied hard to get ahead, and was named by the emperor, it must be a good story to spread.If some legends are added, it can be written as a play.

If it weren't for Jinling University's prohibition on the entry and exit of idlers, from now on, the school's threshold would probably be trampled to pieces by matchmakers.

Zhao Han talked to other students again, giving encouragement, and everyone was delighted.

Suddenly, Lu Tianxiang jumped out, knelt down and kowtowed on the spot: "Your Majesty, after I learn [-] characters, can you make me a female general?"

As soon as this remark came out, the audience fell silent, and then snickered.

As for Lu Tianxiang, who was in charge, she looked like a barbarian girl who didn't understand etiquette at all, so she came here to beg to be a female general.Many students tried their best to hold back their laughter, which was very painful, and their cheeks hurt from holding back.

"Get up and talk, you don't need to kneel down." Zhao Han smiled.

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

Zhao Han scrutinized this woman, and his first impression was that she was tall, perhaps more than 1 meters by naked eye.He asked: "If you want to be a female general, what skills do you have?"

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

Zhao Han said: "If it's all about these, then you can only be a cavalry pawn, and you have to rely on military merit to advance through the ranks."

Lu Tianxiang said: "I have made meritorious service. Mu Kui of Huajiao Zexi was captured by the Datong army only after I shot an arrow."

Zhao Han said: "This kind of credit can be compared to ten cavalry leaders."

"There are only ten soldiers, can I command a hundred?" Lu Tianxiang asked.

Zhao Han said, "Are you buying vegetables? You're still bargaining."

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

This dialogue made everyone very happy, but they dared not laugh out loud, otherwise it would be disrespectful to the emperor.

Zhao Han also found it interesting, and said with a smile, "We'll talk about it after you learn a thousand Chinese characters."

But Lu Tianxiang said: "Your Majesty, I heard that there was a General Zhang who became a teacher after only knowing a few hundred characters. I don't want to learn a thousand characters, but only five hundred?"

Zhao Han couldn't help feeling emotional: "Unexpectedly, my General Zhang has been fighting in the north all year round, and his great reputation has spread to the southwest."

"Your Majesty, can five hundred characters be enough?" Lu Tianxiang reconfirmed.

Zhao Han didn't know whether to laugh or cry: "Okay, when you can read five hundred characters, you can come to see me with your badge."

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

The fuck can it?

More than 200 teachers and students were amazed, and after messing around with His Majesty, they actually got the palace waist card.

"Thank you, Your Majesty, I will work hard to learn how to read!" Lu Tianxiang burst out with endless motivation to learn.

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

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

After a report, Zhao Han said: "Please write down the essentials of the hot air balloon and hand it over to the Ministry of Industry. All departments of the Datong Army can equip this object and use it with binoculars to observe the battlefield. Also, let people continue to experiment, try With other reliable fuels, try to keep the hot air balloon flying for as long as possible. It landed in more than a quarter of an hour, and the time is too short.”

"I obey the order!" Fang Yizhi said.

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

Especially the students who participated in it, after graduation, as long as they want to, they can enter the physics hall of Qintianyuan without taking an exam.

Zhao Han asked: "Do you know why hot air balloons can go to the sky?"

Fang Yizhi replied: "Buoyancy."

"Very good!" Zhao Hanlong was delighted.

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

Perhaps, it can also backfire.

Zhao Han said: "I have an idea. When an iron pot boils water, the steam can break open the lid. Is it possible to make a machine that can be driven by steam, just like a large spinning wheel driven by water power. This kind of machine can be made by everyone The spinning wheel does not need to be set up by the water, it can be used anytime and anywhere, and it can be spun and weaved by burning charcoal.”

Fang Yizhi thought for a while, and felt that it seemed feasible, but at the same time he felt clueless.

Zhao Han said: "You go back and think about it slowly. You can also make this matter public so that people with insight can come up with ideas together."

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

As for the steam engine, Zhao Han only knew that the steam did work, but he didn't know exactly how it worked.It seems that the junior high school physics textbooks have mentioned it, but all of them have been returned to the teacher, so the physics teacher did not say thank you for borrowing and returning.

But Fang Yizhi returned home, thinking hard about the steam engine.

In the evening, when Xu Zhengming came to see him, he opened his mouth and said excitedly, "That hot air balloon of yours really took people to the sky?"

"Didn't you know about the last time you took cats and dogs to heaven?" Fang Yizhi said.

Xu Zhengming scratched his head and said: "I always feel that hot air balloons are unreliable. They are blown away by the wind and cannot be controlled. What if they fall down? I didn't expect it. It really took people up and down."

Fang Yizhi sighed: "Stop making flying chairs, and make steam machines with me."

"Steam machine?" Xu Zhengming was confused.

So, Fang Yizhi began to talk about the basic principle, which is to use steam as power for boiling water.

Xu Zhengming was immediately inspired, can you make a super-large flying chair, and then boil water and use steam to drive it?

This guy is only thinking about the helicopter.

As for the task Zhao Han gave him, Xu Zhengming has made another contribution, improving the weaving bed to thirty.It only took Xu Zhengming three months to upgrade from [-] to [-]. He thought it was too simple, so he tried his best to modify the helicopter.

Fang Yizhi and Xu Zhengming called together more than a dozen scholars and craftsmen, and began to study steam engines 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, pointing to the drawing and making gestures: "Use a closed iron pot to boil water, steam enters here, and pushes the movable air plug to the right. The piston is connected to the connecting rod to drive the flywheel to rotate. When the flywheel rotates half a circle, the connecting rod will be pushed back, and the connecting rod will push the piston to the left to discharge the waste steam from below. New steam will come in again, pushing the piston to the left again, and the flywheel will continue to rotate .”

"Second!"

Fang Yizhi was amazed at this design, and then raised doubts: "The steam keeps coming in, pushing the piston to the left, but where does the flywheel get the strength to push the piston back to the right again?"

Xu Zhengming pointed to the drawing and said: "On the flywheel, install a sliding rod, which is connected to a movable valve. When the piston drives the flywheel to rotate, the flywheel drives the sliding rod, and the sliding rod drives the valve, and the air pipe is blocked. , to prevent new steam from coming in. After the piston is pushed to the right and the exhaust gas is discharged, the valve will reopen and new steam will come in."

Fang Yizhi asked in surprise, "How did you come up with it?"

Xu Zhengming said, "I thought about it when I went home."

As a well-known carpenter, Xu Zhengming not only plays with helicopters, but also builds many exquisite objects in his hometown.Devices such as gears, connecting rods, and flywheels have long been handy, and they are all wooden structures.

The two summoned their assistants to continue to refine the design, select the materials for each component, and then let the blacksmith beat and hammer.

In just one month, the world's first steam engine was placed in front of Zhao Han.

"That's it?" Zhao Han couldn't believe it.

Xu Zhengming said: "Your Majesty is really smart, he can think of a way to boil water and steam."

Are you despising me?

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

Fang Yizhi pointed to Xu Zhengming: "In four days, he produced the first set of blueprints."

Zhao Han was speechless for a moment, and could only say, "Try boiling water."

The boiler is fired with charcoal. After cooking for a while, the connecting rod drives the flywheel to rotate rapidly, and it doesn't seem to stop.

So simple?

The famous steam engine was built in a month?

It's so easy!

Zhao Han felt that it was unreal. If he had known this, he would have asked someone to invent this thing a few years ago.

However, the efficiency of the first-generation steam engine was too low. Considering the cost of burning charcoal, it might not be much better than artificial spinning.Moreover, the matching steam spinning machine and steam loom have to be redesigned.

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

Suddenly, stuck.

Xu Zhengming said embarrassingly: "There is a small problem, I will open it and fix it."

Zhao Han suppressed his excitement, let out a breath and said, "Go back and improve, do your best to improve!"

Chapter 516 [Three consecutive good things]

The working model of the steam engine will be created by the French physicist Papin in another 35 years.

But this steam engine is a lever type.

Another 11 years later, it was still Papin who proposed the idea of ​​a piston steam engine, but did not actually start to manufacture it.

Until the 31st year of Kangxi, the real industrial steam engine appeared, which is a vacuum steam engine.

In the 44th year of Kangxi, the atmospheric steam engine was born and was quickly used in coal mines, which can easily drain groundwater.

What Watt improved was the atmospheric steam engine, which was still only used to lift water.

Later, Watt invented the reciprocating steam engine, and the steam engine could be used in factories. In fact, decades ago, during the Kangxi period, there was already an idea of ​​piston workmanship, and even the piston cylinder was designed.What Watt has to do is to design the connecting rod and flywheel, and use the piston and cylinder.

The European steam engine has taken a detour for decades, which is purely caused by differences in commercial use.Everyone only thought about using the steam engine to drain the mine, and had been tossing about it, but never thought about using it to drive the textile machine.

And Zhao Han proposed from the very beginning that steam engines should be used to spin and weave cloth.

Under this kind of thinking, neither vacuum nor atmospheric steam engines will be born (these can only be used for drainage).If you want to complete the task assigned by the emperor, you can only move closer to the piston.

Still, it was outrageous.

Xu Zhengming is simply a god. This guy directly produced the Watt steam engine in just four days.Pistons, Cylinders, Connecting Rods, Flywheels, Spool Valves... Everything!