For revolvers, the firearm itself is actually very difficult. After all, Marin was a military fan when he was a child. He broke a lot of guns and was very familiar with its structure. But the biggest problem is the bottom fire, and Marin didn't know how to make it.

It’s not that the bottom fire technology is difficult, but that the Chinese Internet is very secretive about these technologies and is not allowed to be discussed in later generations. Therefore, even if Malin has visited many forums, he doesn’t know how to make bottom fire. Even Malin read a handwritten novel called Lao Niu in his previous life. In two chapters, because of the detailed introduction of the manufacturing technology of smokeless gunpowder, he was directly 4O4. In such an environment, no matter how much Marlin loves weapons, he can’t get bottom fire technology. Therefore, revolvers and AK have nothing to do with him. At most, he can create a Miner rifle, which is the limit. The single-headed bullet that uses the bullet to depict the rifle is also considered a black technology.

Of course, Marin also knew that the early bottom fire was thunder mercury. However, he did not dare to study that thing. The bottom fire was very sensitive and it exploded much more violently than ordinary gunpowder. A little bit could be sent to the west. He did not dare to study it himself, nor did he dare to let the only scientist Da Vinci study it. After all, this was a life-threatening thing. He could only wait for these primary school students to grow up and chemical talents appeared. Then, let them study it. It is best to study it, but it is nothing if they can't. In short, "I am lucky if I get it, but I am lucky if I lose it."

Our Da Vinci boss is currently working hard to modify the steam engine. After Marin came up with the idea of ​​using soft elephant skin as the steam engine air-closing gasket, the performance of the steam engine has been greatly improved.

Don't underestimate the function of the washer. This thing seems small, but it actually has a great effect. For example, during the French-Prussian War, Prussia used the Krupp rifled steel cannon with a rear-mounted Krupp rifled steel cannon to defeat the French army. Back then, the French army used the Napoleon 12-pound smoothbore cannon with a front-mounted Napoleon was not conservative, but because it did not solve the problem of air holding of the breech gun. Because the gunpowder gas when the artillery fired was particularly powerful. If the rear-mounted artillery was not properly held back, the leaked gunpowder gas could directly kill the artillery. The French had never solved it.

This problem was solved, so the old cannons could only be used during the war. The Krupp company simply used a copper washer to solve this problem, which made the Krupp steel cannon the protagonist of the French-Prussian war and led to the establishment of the German Empire. If the French had the technology of air-retaining washer, Prussia would definitely not have won the French so readily. Even if they could win, they would have won miserably. Even if they could lose. After all, the French army's Chasebo rifle was much more advanced than the Dresse rifle of the Prussian army...

In history, the steam engine used rubber as air-retaining gaskets until the late 19th century. Before, ordinary leather such as cowhide was used, and the effect was not very good. After all, Marin was soaked online, and there were many sources of information. He knew that the elephant skin was soft and thick, which was an excellent air-retaining gasket material. Fortunately, there was a team that hunted rhinos to make rhinoceros leather armor in Senegal, so they were asked to hunt elephants together. By the way, they could also get some ivory back.

As for animal protection, there are so many animals in Africa that do not need protection. Things that are all over the ground can be protected? These animals were killed in later generations to protect them, which is also because Africa introduced a large-scale modern hunting rifle, and the hunting efficiency has been greatly improved.

Just like North American bison, there were tens of millions of them in the early days, and the Indians could not kill them. Later, in the late 19th century, after the modern rear-mounted rifle was introduced, it was killed and almost extinct within decades.

Similarly, the sika deer on Taiwan was killed by modern hunting guns from the late 19th century to the early 20th century.

So, there is no need to worry about the elephant being killed now. After all, modern rifles have not been invented yet. But before Marin died, he would definitely explain to Caesar. If elephants and rhinos are rare in the future, pay attention to protection.

Moreover, Marin now uses elephant skin as air closure gasket, which is only temporary. Because Marin has started planting rubber in the American colonies. Once the rubber starts mass production, Marin will not have to deliberately send people to massacre elephants to obtain elephant skin as air closure gasket…

...

Marin was just thinking about rubber, but probably because he had started to make any progress, and news came from the port that the Cuban colonies in the Americas began to cut rubber and sent the first batch of rubber products back...

Calculate the time, it has been several years since Marin ordered the planting of rubber trees in Cuba. Now, it is indeed time to cut rubber.

But after getting the rubber products, Marin's face turned dark - Damn, what's this thing? Why is it the most basic rubber ball? I'm so big, I still have to play with the ball? In other words, these first batch of rubbers are actually raw rubber...

Marin was so angry - this was a waste of valuable resources!

However, he didn't think about it. Did he talk about the technology of rubber marination (that is, vulcanization) before? Moreover, even Marin probably knew that adding sulfur to rubber during latex molding can make rubber vulcanize and become a practical cooked rubber. But he didn't know how to vulcanize it...

So, he really doesn't blame Cuban rubber-cutting workers. They are responsible for collecting latex from trees. As for how to process it, they don't know...

If Marin wants practical cooked rubber, he has to send someone to the Cuban rubber plantation to study the issue of how to vulcanize rubber. Moreover, it is best to be a craftsman with a spirit of research...

So Marin selected a group of masters of nitro leather craftsmen and sent them to the Cuba rubber plantation. The next time they cut rubber, they will be divided into several groups to test how to vulcanize rubber. And, explore what ratio to use to vulcanize rubber.

Marin’s requirement is that the vulcanized cooked rubber must be tough, elastic, and have a certain hardness. In addition, it also requires certain corrosion resistance...

In addition, Marin also asked those craftsmen to study how to add carbon black powder to rubber. This is the legendary carbon black tire technology. It is said that this technology that appeared in the early 20th century can greatly improve the wear resistance of rubber tires.

The most important application of rubber is probably tires. Therefore, adding carbon black powder to vulcanized rubber is also an important direction for research. If the research is successful, you will directly make great strides to the level of the early 20th century.

As for the more complex steel cord technology, Marin did not allow research. It was not that it could not be studied, but that high-performance steel wire cost too high. Moreover, in the era when there were no heavy vehicles, the carriage wheels and tires did not use advanced tires with steel cords. If it could be used with carbon black reinforced rubber, it would be considered the top-end. After all, according to tests in the early 20th century, tires made of ordinary vulcanized natural rubber were almost worn out when they drove 6,000 kilometers. And carbon black reinforced rubber was fine to travel 100,000 kilometers.

Of course, it is not just tire technology. Marin also plans to use rubber to study life jackets and rubber boats. After all, with the increase in the number of ships in the North Sea, the safety of maritime navigation should also be paid attention to. If sailors all wear life jackets and rubber boats, even if the ships hit the reefs and sank, the sailors will have the opportunity to survive on the sea and support the rescue until the arrival of rescue.
Chapter completed!