When Nie Fan caught up, Zhang Zeyu asked, "Ziyuan, why do you want to go to Beijing?" ”

Nie Fan bent over his knees and gasped for breath before replying: "If my father knew that the two of us went out of the city together, and you went to Beijing alone, do you think I still have a way to live?" ”

Zhang Zeyu smiled: "It's a big deal, Uncle Nie will hang you up and smoke you a few more times!" It's not like I haven't smoked before. ”

Nie Fan stood up and said angrily: "I was beaten, and that's not all the credit of your Zhang Zixing!" ”

Zhang Zeyu put his arm around Nie Fan's shoulders and said as he walked: "We are brothers, what is the credit for each other?" By the way, Ziyuan, if you come together, I'm afraid you also want to take a look at the capital, right? ”

"Cut! What's there to see in Beijing? Isn't it bigger and more crowded than our city? Brother, I'm worried about you, a young boy who is going out for the first time, don't be sold by someone and help count the money! Nie Fan looked disdainful.

"Why don't you have long hair and so little knowledge? The capital is like you said, the city is bigger, and there are more people? Zhang Zeyu has never been to the capital, and he can't say what is good about the capital, so he quickly shifted the focus after criticism, "Besides, what's wrong with the chicks?" Isn't that the key to going out is just that sentence? ”

Nie Fan asked curiously, "Which sentence?" ”

Zhang Zeyu said confidently: "It's not too late to stay first, and the rooster cries early to see the sky!" Don't all the books say that? ”

Nie Fan patted his head: "It's so dangerous!" It's dangerous! Fortunately, I followed, otherwise there is a chance that you will be blinded -= sweat = - medicine, chopped to make buns -= stuffing, you and my brother will never see each other again! ”

"Cross slope in Shandong! It's terrible to be uneducated. Zhang Zeyu shook his head, looking like he hated iron but not steel.

"Who is uneducated?" Nie Fan also scoffed at Zhang Zeyu's statement, "Sun Erniang is from Shandong, right?" Don't forget, most of the people who went to the eastern part of the country were from Shandong. Maybe the descendants of the children and grandchildren of Erniang have opened a branch in which Huozi or which Tun in the Northeast, waiting for you to come to the door with fine skin and tender meat! ”

The two brothers talked as they walked, and they didn't feel tired at first. After walking for more than an hour, I saw that Zhang Zeyu was already a little unable to take a step.

Nie Fan looked at Zhang Zeyu, who was wiping his sweat: "Zixing, are you tired?" Why don't we go back! ”

"No!" Zhang Zeyu said one word very firmly. After wiping his sweat, he explained, "I can still walk, but I have too many things on my body, and it's a little heavy!" ”

"Give it to me and I'll help you get it, I'm empty-handed anyway!" Nie Fan volunteered.

"Good brother!"

Then Nie Fan watched him take something out of his arms in a cold sweat, and muttered in his mouth: This is a book to pass the loneliness of the journey, this is a dagger to prevent the wicked, this is a pill to treat diarrhea, this is ...... After a while, Zhang Zeyu took out twenty or thirty small bits and pieces and handed them to Nie Fan.

Nie Fan saw that his waist was still bulging, so he asked, "What's that on your waist?" ”

Zhang Zeyu patted his waist quite complacently: "Silver!" ”

Nie Fan's eyes widened: "It's all silver? Zhang Zixing, you won't steal all the savings in your mother's dressing room, right? ”

"It's not stealing, it's borrowing! I left a note in it. Zhang Zeyu corrected, "Besides, I only took half of it, so I didn't take it all." ”

"Borrow? You are Liu Bei borrowing Jingzhou - have you borrowed it or not? Immediately, Nie Fan said worriedly, "Your mother saw that you didn't go home at night, and she couldn't find you everywhere, so she had to hurry up to the room?" Let's go back, Zixing! ”

"Didn't I leave a note in my mother's dresser?" Zhang Zeyu said with a big grin, "It's a big deal to go to the inn tonight and write a letter back." Perhaps, the old man has no mischief in front of him, and he still feels clear! ”

Seeing him like this, Nie Fan couldn't persuade him, so he had to say, "Since it's silver, then I'll help you get it!" ”

"What do you want to do?" Zhang Zeyu clutched his waist and looked at Nie Fan vigilantly.

Nie Fan couldn't cry or laugh: "Look at your dress, others will know that you are a fat sheep at a glance, if you really want to be a thief or a strong man, make sure that Zhun'er will be the first to target you!" I'm different, Xiao Er is dressed up, his clothes are shabby, and people can't look at him! Therefore, it is safer for me to put the silver on me. ”

"Okay!" When Zhang Zeyu heard this, he felt that it made sense, so he untied the money bag wrapped under his coat and handed it to Nie Fan with both hands.

When Nie Fan took it, one hand almost didn't catch it: Good guy! No wonder he said he couldn't walk, it turned out that he had hundreds of taels of silver wrapped around his waist!

Zhang Zeyu was still a little uneasy, "Nie Fan, we are good brothers, so I can trust you and hand over the silver to you for safekeeping." Don't try to abscond with the money to force me to go back. I'm going to go to Beijing even if I'm begging for food! When the time comes, you and my brother won't be able to do it! ”

"With the heart of a villain, spend the belly of a gentleman!"

Re-wound the silver two, and the two brothers hit the road again. Nie Fan has been helping at home since he was a child, and he has the strength to do it, and these things are not pressed at all. Zhang Zeyu has no burden, and his steps are brisk. Talking and laughing, after walking for more than half an hour, Nie Fan suddenly stopped and shouted:

"Zixing!"

"What's wrong? Don't persuade me to go back! ”

"Oh. If I'm not mistaken, the capital should be in the southwest, right? ”

"Nonsense!"

"So, why are we going east all the time?"

“……！ Why didn't you say it earlier!! ”

After writing "The Aircraft Research Institute is looking for talents", Sun Yuanqi left the school affairs to Zhang Yuanji and Luo Zhenyu, the newly appointed vice president, and devoted himself to the establishment of the Aircraft Research Institute.

To say that airplanes are new things, in line with Sun Yuanqi's meaning, the institute is to give full play to the innate "cottage spirit" of the Chinese nation, take the photo of the No. 1 Flyer designed by the Wright brothers, and copy it. Then, on this basis, keep improving, continue to research and innovate, and learn from foreign advanced experience, and strive for the top under the premise of ensuring that it does not fall behind.

When I really started it, I found that it was not the case at all: the production of an aircraft, in addition to the design and manufacture on the surface, must also be deeply rooted in two high-end disciplines, fluid mechanics and engine.

Sun Yuanqi studied particle physics and nuclear physics, and he doesn't have a boundary with these two disciplines, but he definitely knows how deep the water is!

It is said that when designing and building an airplane, it should be aerodynamics. However, in 1903, the aviation industry and jet propulsion technology had not yet been born, and the foundation of classical fluid mechanics had been formed, and aerodynamics still existed more as a research direction of fluid mechanics. At this time in China, it is estimated that there are few people who have heard the name "fluid mechanics", let alone "aerodynamics".

Sun Yuanqi is not too worried about this, because mechanics is a purely theoretical thing, and the Chinese are definitely masters among masters when they play, and it is not difficult to catch up. Later generations of academicians such as Qian Weichang, Hu Haichang, Zhu Jianshi, Liu Gaolian, Zhuang Fenggan, Qian Lingxi, and Cui Erjie were all internationally renowned mechanists. is a good example.

The most troublesome thing is the engine!

As a kind of aircraft different from hot air balloons, the most important difference is that it is driven by a power plant, that is, an engine. Not to mention anything else, just say that through the hard work of countless scientists and engineers, until the 21st century, engines are still the shortcomings of the development of China's aviation industry, and many times they have to be imported from Russia. Even if the fourth-generation stealth fighter is developed, China's engine manufacturing is still at the world's second- and third-rate level. This shows how troublesome it is to study the engine!

As for the current 1903, although Sun Yuanqi did not investigate, it can basically be concluded that the development of Chinese engines is a blank. And foreign countries do not know how long they have been studied, and their level can be known just from the large surface ships they produce, and it has definitely reached a very advanced level. As the core part of the ship, the design theory and manufacturing process of the engine are the top secrets of the state, and it is naturally difficult for Sun Yuanqi, an outsider, to come into contact with it. What's more, China's industrial base was still so backward at the end of the Qing Dynasty!

- It can also be seen that the appearance of the first aircraft in Europe and the United States is by no means accidental, but inevitable!

Despite this and that difficulty, Sun Yuanqi did not flinch, because he knew that backwardness at this time did not mean backwardness in the future; Only retreat at this time means backwardness in the future!

Given the complexity and importance of engine development, Sun Yuanqi took its problems out and used them as an independent laboratory. There are two sub-laboratories under the Aircraft Laboratory, one for aerodynamics and one for aircraft design. At present, the short-term task of the laboratory is to recruit students, organize the learning of relevant knowledge, and clone Flyer 1. The rise of China proves that imitation is the first step in research, and copycats are the starting line of innovation. As a fine tradition, the spirit of cottage cannot be lost.

If it is said that the study of big killers such as fat people and little boys takes a long time, the mystery is difficult to speak, and it is difficult for others to get a glimpse of it; Then the development of aircraft and engines is more eye-catching, and the work of secrecy is particularly important. At the beginning of the year, Lao Zhao led the people to sort out the two slopes of the back mountain, the small one has more than 2,000 acres, slender and narrow, limited by mountain streams and peaks, and there are few people at ordinary times, it is very secluded and elegant, and it is the most suitable for requirements. Originally, it was planned to build a sanatorium, so that the teachers could take a paid leave for every four years of work, and they could recuperate here and concentrate on writing. Now it seems that it has to be ceded to these two institutes first.

After sketching out the general lines, Sun Yuanqi began to use his academic connections, such as his laboratory colleagues at MIT and Yale, Professor Martin at UC Berkeley, Professor Rutherford at McGill University, and even some scholars with connections in Europe, asking them to recommend books and materials on fluid mechanics and engine design and manufacturing, or to purchase corresponding equipment on their behalf.

In the process, it is not without good news.

For example, the success of the Wright brothers' flight has not been taken seriously and recognized by the US government and the public. This can be glimpsed from the news appearing in the lace news. And many people are skeptical about it: what is the difference between your Flyer 1 and a glider? Now that we have smart hot air balloons, which fully satisfy the human habit of flying in the sky, why would you bother to make that big bulky wooden shelf?

When Sun Yuanqi heard this, he was very happy: as long as the country and the public do not pay attention to it, for every year they delay, we will have one more year of time to catch up!