Standing in the classroom again, Jiang Tian always felt tired when he thought of the various experiences in the past two months. Or it's a summer vacation, but I can't get a good rest, and I'm a teacher who works too hard. Looking at the students in front of them, except for Song Yi, who is also not idle, and Zhang Huan, who is looking forward to the start of school, most of them have some holiday syndrome. Jiang Tian glanced at the students, and then opened his new textbook unhurriedly, ashamed to say that he had not prepared for the class until now, so he could only play on the spot according to the textbook he had written.

"In today's physics class, we're going to talk about light ......."

Because glass manufacturing is on the right track, most of the glass teaching aids ordered by Jiang Tian are in place, which makes him a lot more comfortable in teaching, such as the optical principles mentioned today, which may be involved in the nature class of primary school in later generations, but here he can only wait for the delivery of various practical equipment before he can start to explain. But don't look at these things, the principle is very simple, it's not so easy to really make it, just like the prism in Jiang Tian's hand, in order to get a piece of glass with uniform material, Song Yi squatted in the workshop and stared at the workers to prepare the liquid glass, and after scrapping more than a dozen blanks, there was a small prop in the classroom. Jiang Tian hung up the thick curtains he had prepared, and then left only a beam of light to shine into the room, and then used a prism to reflect the rainbow.

"I've told you before that light is a collection of rays of various colors, and now we can see that a beam of light is broken down into about seven colors, and these rainbow-like things are the colors that our naked eye can recognize. But beyond these colors, is there any light? The answer is yes......"

After all, it is pulling out seedlings to help grow, and Jiang Tian can't just do a simple and practical yàn and finish it. The key is that he will use this to explain the most basic optical principles, and whether the students can understand them or not, at least let them memorize the various definitions, and as for how to integrate them, they can only summarize themselves in their future work. Jiang Tian spoke quickly, and all kinds of realities were also passed by, and he turned a blind eye to Zhang Huan's repeated questions by raising his hand. And because a lot of the content in the book is very general, the students can only write down his various explanations. At the end of the morning, everyone realized that there were more than a dozen pages of class notes alone. Zhang Huan, who thought he was the best to learn, not only did not understand the old questions, but added a bunch of new puzzles, such as how to prove the wave-particle duality of light? Jiang Tian rubbed his sour wrist, and kept doing practical and writing board books all morning, which reminded him of the dark days when he was in the college entrance examination, but it was different from the developed scientific and technological conditions of that era, and some of the content that required more advanced practical equipment was only passed over for students to understand.

Seeing that the notes were almost sorted out, Jiang Tian took a sip of tea and said: "Don't be surprised, the reason why I want you to write down so many things today is that I am afraid that I will be busy with official business in the future and will not have time to teach every day, and a lot of knowledge may not be able to be understood now, but as long as you insist on exploring science, sooner or later you will be able to prove that what I said is correct." ”

Of course, no one in the classroom doubted his correctness, and for thousands of years, Chinese students have long been accustomed to not questioning teachers. This teaching method has made some traditional students breathe a sigh of relief, and finally they don't have to follow Jiang Tian's unbridled imagination in class. But Zhang Huan was very unhappy, the amount of information he heard this morning was too huge, so he couldn't keep up with the rhythm at all, but felt that he was more ignorant than before, Jiang Tian had to think for a long time about some of the terms he said casually, and he didn't explain the meaning clearly. For this reason, he could only resist the urge to ask questions for the time being, because he heard from his father that His Majesty the Emperor was very dissatisfied with Jiang Tian's mentality of messing around, and wanted to find him something to do.

Jiang Tian's order was simple, first of all, to improve the existing muskets, so that their range and accuracy would be increased by at least fifty percent, and the reload speed should also be increased. Then it was a matter of pre-research on new types of artillery and the reintegration of artillery types...... A simple sentence almost didn't make Jiang Tian mad, if it weren't for the fact that his force value was too low, he couldn't wait to talk to Zhang Tao well. Now it seems that the original machine tool production capacity has been established, but it is still too far from the real industrial revolution, not to mention, that is, the grinding machine and milling machine that have been owned at present can not reach the specified processing accuracy, many precision parts still have to rely on the old craftsman to polish it by hand a little bit, so it is reluctant to assemble a usable flat glass production line, and because the material strength is not enough, the high wear rate of the machine is a headache, in order to maintain the production of the assembly line, it is necessary to arrange a group of people to process vulnerable parts at any time, Good timely maintenance of the machine. In this case, how can a high-precision lathe be manufactured? So during this time, Jiang Tian was thinking about how to improve the production process whenever he had free time.

If you want to say that you are tired, Song Yi is completely harder than Jiang Tian, but he is painful and happy, since he knew that Jiang Tian began to take over the research and development of firearms, the entire Academy of Sciences understood that something shocking was about to be born. Only the emperor in the world can ignore Jiang Tian's laziness and force him to work hard. Otherwise, although no one can mess with this master in the Academy of Sciences, he will never take the initiative to undertake any scientific research tasks, at most, he will remind you a sentence or two when he is in a good mood. Now that His Majesty, who values army building, has finally endured his lazy style, so everyone will wait and see what unexpected good things he can create.

"The problem with the Chinese scientific community is not that people are not smart, but that they are too utilitarian and focus on results, but they also scoff at basic research. You don't even know how to walk, how do you learn to climb a mountain? Jiang Tian held a pencil and worried about a bunch of drawings: "In order to avoid the lack of materials, the design of the machine can only be complicated, which may not work, if he really understands science, at least wait for a breakthrough in raw materials!" ”

Song Yi and Xinyue, who were drawing on the side, didn't squeak, and the fool knew that he was complaining about the emperor's nonsense, but no one dared to say this except him, and before he Jiang Tian appeared, Zhang Tao could be regarded as the person who knew the most about science in China, who would dare to deny the emperor's knowledge except Jiang Tian? It's just that in terms of science, the whole of China really can't find a figure who can compare with him, so no matter how much he complains, everyone has to pretend that they didn't hear it.

Zhang Huan, who was playing soy sauce on the side, heard him slander his father like this, and he didn't feel very good in his heart, so he thought about a few words of defense: "Presumably, the emperor has no time to think about scientific things, and besides, this also reflects his trust in you!" ”

People who know the inside story can hear that Zhang Huan excuses his father, but Jiang Tian and Xinyue don't know his identity, Xinyue is okay to say, this little junior brother usually has a sweet mouth and is willing to study science, so he is very angry with her. Jiang Tian had already been impatient with this student like a dog skin plaster, so he just glanced at him and sneered: "There are all kinds of opportunities in the day, but there is a specialization in the art industry, and his trust can only promote the unhealthy trend of opportunism. Why should I go to the trouble of opening this private school? It's not that you want to learn more and eventually learn to think for yourself! ”

In fact, judging from his scientific level, he is already a high-level intellectual in this era, but the feeling of awe in the face of Jiang Tian has not diminished, and it can even be said that he is more convinced that his ignorance is so ignorant that Cheng Dù makes Jiang Tian despise, maybe this Jiang Fuzi did not look down on any student. But as his father said, only when the knowledge is more abundant, can we understand our ignorance more deeply.

Wu Yuan saw that the two of them were about to quarrel, and hurriedly glanced at Song Yi, who also immediately understood, so he persuaded Wen Yan: "Mr.'s painstaking students are naturally difficult to understand, but now that the north is not quiet, if the students are so recuperating in order to fight again, it will inevitably take too long, and I am afraid of complications." Therefore, His Majesty was as anxious as the burning edict to order Mr. to improve firearms, although there was a suspicion of urgency, but it was also based on the thoughts of the common people in the world. ”

Jiang Tian put his hand into his messy hair and scratched his scalp, then threw down the pencil with a long sigh: "Don't I know what you said?" Everyone misses the strong Han and the Tang Dynasty, but no one thought that there was also an alliance under the city that was humiliated, and since ancient times, weak countries have no diplomacy. It's just that his holy decree is general, and it is better to say that the artillery is standardized, whether it is divided in terms of use, caliber or equipment level, it is just a copywriting operation. However, although there is a technical way to increase the performance of muskets by 50 percent, it is a bit difficult to meet the prerequisites for large-scale manufacturing. Speaking of which, it's because of the lack of basic research, otherwise I could have made something more advanced than this! ”

Everyone was shocked when they heard this, and it was said that the reason why the decree was vague was because the existing technology could not guarantee that the task would be completed 100%. Any old fritter in officialdom knows this, but this Jiang University scientist has the temper of a science student, and he has to carry out research according to the bid. But what he heard was not that he was too demanding, but that he complained that the foundation was not enough to drag him back! You must know that the maximum firing range of the large-caliber musket can reach 200 meters, which was unimaginable more than ten years ago, and an increase of 50 percent is to reach a range of 300 meters while ensuring accuracy, which is already an impossible task. But when this matter came to Jiang Tian's mouth, it became: This requirement is too pediatric, and I can design better things, but can you make them? Zhang Huan, who still had the heart to protect his father's dignity, had no choice but to shut up. He has only the position of being guided in academic matters, and has no qualifications to argue. But in my heart, I was a little eager to try, and I really wanted to participate in such a great scientific research group, instead of just sitting on the side as a related household auditor.

"That's it!" Jiang Tian, who seemed to be a little resigned to his fate, finally made up his mind: "Anyway, it's not once or twice, the scientific system here has been deformed and developed, so it's better to let him slowly plump up." ”

What he said was a bit confusing, but the final meaning was clear, that is to say, Jiang Tian, who was still obsessed with gradual progress, was finally forced to a dead end by the emperor, and he no longer resisted the emperor's chaotic life.

"From today onwards, you, the students of the advanced class, will be in class with the members of the project team who have come to study here, and if we want to understand the research direction of firearms, we must first know a few simple knowledge." Then I saw Jiang Tian turn around and write three big words on the blackboard: "Ballistics"!

"There are no textbooks for this subject, and I don't know much about it, so I can only lead you through the door, and as for what you can learn, it's your own business."

As a half-army fan, how much knowledge can Jiang Tian know about firearm design? At most, I've seen exploded views of some modern guns. But there is no use for how to design a flintlock rifle. Besides, he does not have enough materials to make the mercury, and all the sulfuric acid in the real yàn is a small number of real yàn products made by the local method. Large-scale industrial production is not yet possible, and the official mass production of mine mercury is far away, and what is used as a primer for cartridge shells without such a thing? The absence of such a fuse means that the design of a firearm with a modified bullet in one step is too advanced and useless. The design idea had to go back to the traditional structure, and the first thing was to modify the shape of the bullet.

"The traditional lead bullet is spherical, and the advantage is that it is easy to manufacture and there is no need to consider the loading method when loading, as long as the lead shot is inserted through the muzzle. But the disadvantages are also obvious, in the case that the propellant cannot be improved, the air resistance of such a bullet is too great, which is not conducive to the improvement of accuracy and range. Then Jiang Tian took out a pencil sketch: "So I designed this jujube kernel type bullet, and there is an obvious concave tail end, which can increase the surface area of the gunpowder acting on the projectile, and obtain a more stable flight trajectory......"

As soon as he said this, Liu Baokai raised his hand very rarely, so that the whole room, including Jiang Tian, looked at him in surprise: "Sir, if I remember correctly, when I was defending the Yangtze River, His Majesty made this kind of bullet, and because of the scarcity of quantity, only a part of this bullet was issued to sharpshooters to deal with key targets!" ”

On this issue, he is indeed the most vocal, because whether it is Song Yi or Wu Yuan, although they are similar in age to him, but everyone has childhood memories composed of blood and fire, it can be said that this seemingly unbalanced alternate duke, I think that with the army moving to the north and south, he is a real battlefield veteran.

Jiang Tian smiled slightly: "I have seen the kind of bullet you mentioned, but only because of the high casting requirements, not only is the output low, but the effect is not as good as expected." However, I have solved the method of mass-producing this bullet, and the actual effect must be much better than the original one! ”

The pervert didn't dare to speak, in fact, as long as Jiang Tian claimed that his design was the best, no one would refute him. Song Yi pondered for a while, and then suddenly remembered that the stamping machine used to mint coins was used, and even hard silver could be molded under the water conservancy stamping machine, so as long as a sophisticated mold was made, it was definitely not a problem to press out qualified lead bullets in batches.

At this time, I saw Jiang Tian take out a wooden frame pasted on the window lattice, and then gestured and said: "In a sealed room long enough, place such a wooden frame every half a meter, and then find a musket, fix the position, shoot at the paper in this slippery wooden frame, and finally take off the paper, we can get a continuous ballistic model, with this method, as long as you have enough patience, you can choose the best bullet shape." ”

Just when everyone thought that this method was a bit unbelievable, the pervert spoke again: "I heard a veteran in the army say that although this kind of pointed bullet has a long range and a slightly better accuracy, it is much less powerful, and it often passes through the body, and it may not be able to kill the enemy." ”

It may be that he finally found the topic he is interested in, Liu Baokai rarely dozed off in class, and those researchers who participated in this kind of teaching activity for the first time were even a little awe-inspiring.

Jiang Tian also nodded with satisfaction, this kid is finally not messing around here: "That's right, if this bullet hits an unarmored target, it is likely to cause this phenomenon, so I have also designed several improved bullets." ”

I saw that he took out a few more drawings, one of which impressively carved a few deep grooves on the tip of the bullet, while the other appeared to be longer than the other bullets: "These designs can achieve the effect of increasing lethality, but which one is better, I don't know the bottom of my heart, so in addition to using these bullets for ballistic tests, we also have to conduct power tests, and the main task of the researchers is to tirelessly test and error, and finally find the optimal solution." ”

Song Yi, who had not spoken all this time, finally couldn't help it: "We will definitely fulfill your request seriously, but can this bullet alone increase the range by fifty percent?" ”

Jiang Tian was very satisfied with Song Yi's progress, this kid could already use the knowledge he had learned to see the essence of some problems: "Of course not, and this simple repetitive work is not your job, starting tomorrow, we will study a new machine tool, I will temporarily name it boring machine!" ”