Li Xiang also knows that he can't be in a hurry now, after all, if Shaoxi Mansion wants to become a small kingdom that can be self-sufficient in all aspects, or a small kingdom with an industrial level, this is not something that can be done in a year and a half, and all aspects have to develop slowly. Pen | fun | pavilion www. ｂｉｑｕｇｅ。 ｉｎｆｏ

Take artillery as an example, the current Tiger Squat Cannon is still a primary artillery, if there is the kind of howitzer of later generations, and real rocket artillery, it can easily defeat the Mongol cavalry.

A howitzer is a field gun with a short barrel and a curved trajectory, which is suitable for striking hidden and flat targets. Howitzers can be divided into towed and self-propelled according to the mode of maneuvering, because its trajectory is more curved, so the projectile has a large falling angle, close to falling in the direction of the plumb, so that the shrapnel can be evenly fired in all directions, so the howitzer is one of the main types of ground artillery.

As early as the seventeenth century, Europe called this kind of cannon with a large firing angle as a howitzer, and the length of the cannon body was 15~22 times the caliber during the First World War, and the maximum firing range was 15 kilometers. In World War II, the length of the gun body was 20~30 times the caliber, the maximum firing range was 18 kilometers, the initial was 635 m/s, and the maximum firing angle was 65 degrees. After reading these introductions in the super 3D printer, Li Xiang has another layer of understanding of artillery, at least he has a new concept of the range of future artillery.

In fact, from the appearance of artillery to the nineteenth century, cannons were generally smoothbore front-loading guns, firing solid ball shells, and some guns fired spherical explosive shells and scattered shells. The original rifled guns were rifled, the main purpose was to facilitate the frontloading of the projectile, this kind of artillery had slow firing, low firing accuracy, and the firing range could not be greatly improved.

In order to increase the range of artillery, European countries conducted rifled gun experiments in the early nineteenth century, and later the Italians developed a spiral rifled gun with a long explosive shell with a cone-head cylinder. The spiral rifling rotates the projectile and stabilizes the flight, which improves the power and accuracy of the gun, and increases the range of the gun. At the same time as the appearance of rifled guns, the bolts were improved, the guns were rear-loaded, and the firing power was significantly increased.

Li Xiang thought about it for a long time, and finally thought that with the current level of technology, there was no way to overcome these two obstacles, but if a steel with higher strength could be obtained, and this steel could be produced in large quantities, and at the same time, the corresponding processing technology could be exhibited, and the bolt could be made, and it would be easier to make a breech-loading gun. After the development of large-scale processing machinery, it can make split shells, so that the barrel of the artillery is transparent, which is greatly conducive to heat dissipation and maintenance, and the firing frequency will also be significantly improved.

Thinking of this, Li Xiang even wanted to start printing a precision machine tool immediately, of course, this can only be just thought, such an advanced thing appeared at this time, it doesn't seem to be very good.

At present, the copper output of the Southern Song Dynasty is not less than that of other countries, but it is far from enough to be used for mass manufacturing of artillery, especially in the past ten years, due to the serious depreciation of Huizi, so that a large number of hard currency outflows, that is to say, a large amount of copper money flows into other countries, and the Southern Song Dynasty court in order to alleviate this contradiction, had to step up the casting of copper coins, but at this time the official copper reserves of the Song Dynasty have been seriously insufficient, and the government even collected copper pots and copper basins in the private sector and returned to the furnace for smelting.

Fortunately, Li Xiang used iron, of course, iron was also very insufficient, because the cold weapons equipped by the Great Song army had to use iron. At this time, if we want to realize the mass production of artillery, in addition to solving the problem of supply of raw materials, we must also improve the strength of the material and improve the processing technology, which is naturally a great project. In fact, there is another thing that Li Xiang did not consider, which is the output of iron. There is no iron mine in Shaoxi Mansion, so you can only go to Panzhihua to open a mine. But shipping is a big problem.

Someone once said that ancient China did not lack technology, but science. Why did the West turn handicrafts into industrial civilization, but China did not? That's because China lacks Western science. In fact, industry is equal to handicraft industry plus science, and handicraft industry can only be developed into industry when it is combined with science, otherwise it can only stay in the handicraft stage forever. In the past few days, Li Xiang has thought through this matter, only those industrialized science and technology, spread, of course, in Shaoxi Mansion, it is possible to achieve the goal, after many days of careful consideration, he has a comprehensive plan, if this plan goes well, not only the new cannon can be manufactured, but also to make guns also appear more realistic, more importantly, with a super 3D printer there are basic conditions for the development of industry.

When lunch arrived, the atmosphere at the dinner table was really a little weird, Huan'er, who usually served Li Xiang with vegetables, had red eyes at this time, silently picking up the rice, and didn't even put a little vegetable in the bowl; Zhao Mengyao is on weekdays, so people can't see the abnormality, and she still eats silently, occasionally picking up some vegetables.

Xiu'e turned her big eyes to look at Zhao Mengyao's face, and finally couldn't help but say loudly: "Miss Zhao, you... You seem to be getting prettier today! ”

Zhao Mengyao's eating action stiffened, and Li Xiang said secretly, it's over!

Sure enough, Huan'er's eyes were filled with tears for a moment, and then she fell into the bowl with "let's click, let's click".

Li Xiang slapped Xiu'e on the head and scolded: "Eat honestly, what to say!" ”

Xiu'e lowered her head, as if she also felt the strange atmosphere at the dinner table, but she didn't dare to stiffen her mouth, and obediently lowered her head and picked up the rice in the bowl.

Li Kang also saw something, didn't he have that with Luo Ying himself?

Li Xiang looked at Huan'er who was crying silently, stretched out his right hand under the table, and tightly grasped her soft little hand, Huan'er raised her head, and her pretty face with pear blossoms and rain smiled sadly at Li Xiang, and then lowered her head and took a few mouthfuls of food, and hurriedly got up and went back to the room.

Li Xiang saw Zhao Mengyao looking at him, there was worry in his eyes, he smiled and said that it was okay, but he couldn't help but curse secretly in his heart: Damn, who said that ancient women were not jealous, but they were nonsense!

Although the weather is sunny and the sun is shining, Li Xiang's heart is a little irritable, he didn't expect that he and Zhao Mengyao had sex, but it had such an impact on Huan'er, with the temperament that Huan'er usually shows, it should be more than that! But, in any case, this mistake must be admitted, and it must be sincere, hey!

When night falls, the evening breeze is slightly cool, the whole Shaoxi City is lit up, and the people who have been tired for a day come home with hoes and start to cook simple meals, although the rice style is simple, but the eating is sweet!

At the dinner table, looking at the vacant seat on the right, Li Xiang sighed, called the maid on the side, prepared two bowls of rice and two dishes of side dishes, and then walked towards Huan'er's room with a wooden plate, Zhao Mengyao did not speak out against it, but his eyes encouraged him, Li Xiang's heart warmed, he didn't expect Zhao Mengyao to be so understanding, he felt that he didn't know how much incense in his previous life would let God send Zhao Mengyao, but unfortunately she was unknown, and she was a Mongolian, so she wouldn't be an ordinary Mongolian, and I didn't know if it was good or bad. (To be continued.) )