Bo Jue is very interested in weapons, there is a certain reason, Zhu Youxiao's protection of the top scientists of this era is very strict, each top scientist's personal guards will not be less than four, and the weapons equipped are the most advanced, their skills are definitely not inferior to the guards around Zhu Youxiao, this is also Zhu Youxiao's experience in later generations, this kind of protection began when the war against the Nurhachi tribe began, and this is to thwart several murders.

Bo Jue was a little disgusted with these guards at first, but later accepted these guards after several reprimands from Zhu Youxiao, especially when he encountered danger during an outing, he fell into the river and almost drowned, but the guards quickly rescued him. The most dangerous one was the attack of the Japanese ninjas, who tried to kidnap Bo Jue, but was quickly killed by the guards, these two events made Bo Jue completely accept the help of the guards, and became friends with them.

The most advanced weapon of the guards is the special pistol used in close defense, this is not the kind of *, but Zhu Youxiao according to the German barge gun design of the later generations of repeating pistol, the function is naturally not as powerful as the barge gun, not like the original can be automatic burst, but it can be fired in a single continuous shot, no need to reload the bullet every time, its firing setting is automatic, can automatically restore the firing position, automatically reset by the spring with high elasticity, limited to material reasons, can not be popularized in large quantities.

Bo Jue suddenly became interested in the pistol after seeing this pistol that can shoot continuously, in fact, this is also the common nature of all young people, who doesn't like to have a powerful weapon in their hands. For the improvement of this pistol, Bo Jue does not have much way, and the material has limited its development, but the copper-shelled bullet rifle can still be improved, and the hand-cranked machine gun can also be improved, so Bo Jue's interest in transforming the gun started with the rifle.

Now the Ming army is equipped with a large number of paper bullets, the projectile uses an iron column bullet with a pointed tip, after each shot, you need to pull back the trigger, open the magazine, and load the bullet before the next shot, and the confetti affects the efficiency of the design very much, the wear of the iron bullet on the barrel is also very bad, and the most advanced copper-shelled bullet rifle is also the same, but the time to clean the magazine is simplified. It turned out that because of the scarcity of copper ore in Daming, this kind of bullet could not be used at all.

Now it is different, Niu Jinxing has brought back a large amount of refined copper ore from Xinluoyang, and the copper content of these refined copper ores has reached 30% after preliminary beneficiation, so Zhu Youxiao ordered a large number of copper ores to be transported back and further strengthened the smelting of copper ore, so that the use of copper-shelled bullets is not an obstacle. Based on this situation, Bo Jue began the process of renovating the guns, hoping to replace all the firing rifles with rifles that can automatically reload to increase the shooting speed of the soldiers, so that even if they encounter the opponent's cavalry troops, in addition to the machine guns, the rifles can resist their rapid approach.

The design of the barge gun is very classic, although there is no large number of equipment in its place of origin in Germany, but it has been popular in China for decades, that is, it is a treasure collected by gun lovers for a long time in later generations, its most classic design is the use of chicken claw gears, and the use of re-entry springs, it is impossible for people at the bottom like Zhu Youxiao to see the authentic barge gun, but the scrap yard still has some of these old antique fragments, plus the toy pistol can continuously shoot plastic bullets * , Zhu Youxiao combined these things to design a pistol that could continuously pull the trigger to shoot.

Now the firing pistol is a fixed barrel, even if it is a copper-shelled bullet rifle, but the barrel of the barge gun can slide, the long gun needs to be stable, the barrel can not slide, which needs to be solved by ideas, Bo Jue refers to the pistol structure of the guard, since the front can not be moved, the idea is made from the back, and then the movement of the firing mechanism is designed, after unremitting efforts, and hundreds of tests, finally developed a primer exhaust gas to compress the cartridge case back, grab the cartridge case with a grappling hook, and resist the cartridge shell piece when retreating to a certain part, Then the cartridge shell ejects the bullet shell, these things are very simple to say, but it is very complicated to make them, and at the same time, it also takes into account that when the bolt retreats, the sub* at the bottom is fed to the top at the same time, this design is far from the automatic rifles of later generations, but it is enough for now, and the firing speed is already very fast.

Looking at the new semi-automatic rifle, Zhu Youxiao was very excited, this kind of gun should have appeared in more than a hundred years, and now it has appeared in the Ming Dynasty, although it is not as good as the semi-automatic rifles of later generations, but now it is enough to deal with all the strong enemies in the world. Zhu Youxiao naturally will not give these inventions to Bo Jue to register invention patents, this is a great tool of the country, and it must be kept strictly confidential, as for the reward, it must be very generous, and directly awarded Bo Jue the same title as Xu Guangqi and Song Yingxing, which surprised Bo Jue.

Bo Jue's inventions are not limited to these, using the reference of these inventions, Bo Jue continued to transform the hand-cranked machine gun, so that the hand-cranked machine gun really became an automatic machine gun, and there was no longer a need to crank by hand, but it was a little heavy, which was not a big disadvantage, it was nothing more than a few more people to lift.

The emergence of automatic semi-automatic weapons has greatly improved the armed forces of the Ming army, but there is a new problem, that is, the consumption of the barrel is very large, because the shooting speed is faster, the more bullets are used, and each soldier needs to carry several barrels to fight. For this problem, Song Yingxing's method is to use tungsten alloy to make the barrel, ordinary rifles use tungsten concentrate to directly refine, machine guns are relatively few, and they are made of refined tungsten alloy, and the rifling is not easy to carve, so the method of casting is directly adopted, and the iron mold casting is used, in order to prevent the uneven casting wall, the mold can be rotated at high speed, so that the barrel wall is very thick.

The shape of the bullet also needs to be transformed, the original iron warhead has been used, it is very wearful on the rifling, Bo Jue suggested to use lead bullet instead, compared with iron bullet, the texture of lead bullet is relatively soft, that is, the rifling damage to the barrel is small, and the gap of the barrel can also be closed, so that the sealing is better, the initial velocity of the shot is greater, and the specific gravity of lead is relatively large, and the flight line is more stable after shooting.

Because the guns designed by Bo Jue are relatively simple, Zhu Youxiao believes that many parts can be stamped and forged, so that a lot of manufacturing processes can be saved, and some places can be directly connected with rivets or screws, but the current punch strength is still relatively small, and some punches with greater power must be built, plus the use of clutch equipment, to be able to do these jobs, and the use of large punches must also use large pressure equipment, and there are other places, such as the need to build large steel warships in the future, and the cylinders of large steam engines, In this way, the hydraulic press became a heavy equipment that had to be built.

In order to develop the equipment to large-scale in the future, Zhu Youxiao decided to build a large hydraulic press, using the pressure formed by the large hydraulic press to manufacture many large forgings, in order to build this project, Zhu Youxiao handed over this task to Song Yingxing to organize. Song Yingxing saw that Zhu Youxiao attached great importance to this large hydraulic press, so he mobilized the most powerful manpower, including Xu Guangqi, Song Yingxing, Bi Maokang, Zhu Ling, Bo Jue, etc., together with their apprentices There is a team of twenty or thirty people.

According to Pascal's law, when the pressure increases at any point in an incompressible stationary fluid due to an external force, this pressure increase is instantaneously transmitted to each point of the stationary fluid. According to this theory, the specific calculation formula is that the pressure is equal to the acting pressure divided by the force area. According to Pascal's law, applying a certain pressure to one piston in a hydraulic system must produce the same pressure increment on the other piston. If the area of the second piston is 10 times the area of the first piston, then the force acting on the second piston will increase by 10 times that of the first piston, while the pressure on both pistons will still be equal.

This calculation formula and method are easy to calculate, but it is more difficult to manufacture materials, otherwise this large hydraulic press would not have bothered many countries for many years. Fortunately, Zhu Youxiao is now using the power of the state to make this thing, and he is not afraid of wasting silver, so he asked Song Yingxing's research team to keep experimenting, and finally made a hydraulic press with a pressure of two million catties a year later, which is only an insignificant 1,000-ton hydraulic press in later generations, but now it is the highest level of hydraulic press, Zhu Youxiao's plan is to make another 5,000-ton hydraulic press according to this research in the next few years, so that you can make a steel fleet of more than 2,000 tons. Because the keel forging of the giant ship must be strong and pressure-resistant.