In the case of revolvers, the difficulty of the guns themselves is extremely low. After all, Marin was a military fan when he was a child, and he broke a lot of smashing guns, so he was familiar with its structure. But the biggest problem was the primer, and Marlin didn't know how to make it.

It's not that the primer technology is difficult, but that these technologies are kept secretive on the Huaxia Internet in later generations and are not allowed to be discussed. Therefore, even if Marin has visited many forums, he does not know how to make a primer. Even, in his previous life, Ma Lin saw a street writer named Lao Niu write by a handwriter, and two chapters were directly 4O4 because of the detailed introduction of the manufacturing technology of smokeless gunpowder. In such an environment, no matter how much Marin loves weapons, he can't get the technology of making fire. So, what revolver, what AK, has nothing to do with him. The most he can do is make a Migne rifle, which is already the limit. And the single-headed bullet with the warhead depicting rifling currently used can also be regarded as black technology.

Of course, Marlin also knew that the early primer was thundermercury. However, he didn't dare to study it. The primer is very sensitive, and the explosion is much more violent than ordinary gunpowder. A little bit can send people to the western sky. He did not dare to study it himself, nor did he dare to let the only scientist, Leonardo da Vinci, do it. After all, it's a matter of fate. can only wait for these elementary school students to grow up and chemical talents appear. Then, let them do their research. It's best to research it, and it's nothing if you can't study it. In short, "I am fortunate to have gained, but I have lost my life......

And 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 a closed air washer for a steam engine, the performance of the steam engine was greatly improved.

Don't underestimate the role of the gasket, this thing may seem small, but it actually has a big effect. To give a simple example, during the Franco-Prussian War, Prussia used the rear-loading Krupp rifled steel cannon and won the French army. At that time, the French army used the front-loading Napoleonic 12-pounder smoothbore gun not to be conservative, but because it did not solve the problem of breath-holding of breech guns. Because, when the cannon is fired, the gunpowder gas is particularly powerful. If the rear door of the rear-loading gun is not well closed, the gunpowder gas leaked out can directly kill the artilleryman. The French never solved this problem, so they had to continue to use old artillery during the war. The Krupp company solved this problem by simply using a copper washer, which made the Krupp steel cannon the protagonist of the Franco-Prussian War and led to the establishment of the German Empire. If the French had also had air-tight washer technology back then, Prussia would certainly not have been able to win over the French so easily. Even if it can win, it will be a pyrrhic victory. Even, it is possible to lose. After all, the Chaseper rifles of the French army at that time were much more advanced than the Dreiser rifles of the Prussian army......

Originally, it was not until the late 19th century that steam engines used rubber as air-tight washers. Before, ordinary leather such as cowhide was used, and the effect was not very good. After all, Marin has actually soaked in the Internet, and there are many sources of information, so he knows that elephant skin is soft and thick, and it is an excellent air-tight gasket material. Fortunately, there was a team that hunted rhinoceros for rhinoceros in Senegal for rhinoceros leather armor, so they were allowed to hunt elephants together. By the way, you can even get some ivory back.

As for animal protection, there are so many animals in Africa that they don't need to be protected. Something that walks all over the ground, can it be protected? These animals were killed to be protected in later generations, also because of the large-scale introduction of modern hunting rifles in Africa, and the hunting efficiency has been greatly improved.

Just like the North American bison, tens of millions of them in the early days, the Indians could not kill them all. Later, in the late 19th century, after the introduction of the modern breech-loading rifle, it was killed to the point of extinction within a few decades.

Similarly, the sika deer on Taiwan Island were killed by modern shotguns in the late 19th and early 20th centuries.

So, now there is no need to worry about the elephants being exterminated. After all, the modern rifle has not yet been invented. But Marin must give Caesar an account before he dies, and if elephants and rhinos are scarce in the future, he must pay attention to protection.

Moreover, Marlin now uses elephant skin as a closed airwasher, and that is only temporary. Because, Marlin has already begun to grow rubber in the American colonies. Once the rubber was in mass production, Marlin would no longer have to send people to slaughter elephants to obtain elephant skins to be used as air-tight washers......

……

Marin was just thinking about the rubber here, and probably the chatter took effect, and the news came from the port over there - the American Cuban colonies began to tap rubber, and sent the first batch of rubber products back......

Counting the time, Marin has been ordering the planting of rubber trees in Cuba for several years. Now, it's time to tap.

But after getting the rubber products, Marin's face instantly turned black - Nima, what kind of thing is this? How is it still the most rudimentary rubber ball? Lao Tzu is so old, he still wants to play ball? In other words, this first batch of rubber turned out to be raw rubber......

Marlin was furious - what a waste of precious resources!

However, he also didn't want to think about it, did he talk about the technology of rubber curing (that is, vulcanization) before? Moreover, even Marlin probably knows that the addition of sulfur to rubber when the latex is molded can make the rubber vulcanize and become a cooked rubber with practical value. But he didn't know exactly how to sulfide......

Therefore, he really blames the rubber tapping workers in Cuba. They are responsible for collecting the latex from the trees, and they don't know how to process it......

Marin wanted practical cooked rubber, and he had to send someone to the Cuban rubber plantation to study the problem of how to vulcanize rubber. Moreover, it is better to be a craftsman with a spirit of research......

So Marin selected a group of skilled craftsmen who made nitrate leather and sent them to the rubber plantations on the island of Cuba. The next time they tap, they will split into groups and test how to vulcanize the rubber. And, explore what kind of ratio to use to vulcanize rubber.

Marlin's requirements are that the vulcanized cooked rubber should be tough, elastic, and have a certain hardness. In addition, a certain amount of corrosion resistance is required......

In addition to this, Marin also asked the craftsmen to study the technology of how to add carbon black powder to rubber. This is the legendary carbon black tire technology, which is said to have appeared in the early 20th century, which 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 of research. If the research is successful, it will directly enter the level of the early 20th century.

As for the more complex steel cord technology, Marin did not let the research. It's not that it can't be studied, but that the cost of that kind of high-performance steel wire is too high. Moreover, in the era when there were no heavy vehicles, the wheel tires of horse-drawn carriages did not need high-grade tires with steel cord. If you can use carbon black reinforcing rubber, it is considered the top match. After all, according to tests at the beginning of the 20th century, tires made of ordinary vulcanized natural rubber are almost worn out after 6,000 kilometers. And carbon black reinforcing rubber, driving 100,000 kilometers is no problem.

Of course, it's not just tire technology. Marin also intends to use rubber, research life jackets and rubber boats. After all, with the increase of ships in the North Sea in the future, the safety of maritime navigation should also be taken seriously. If the sailors are equipped with life jackets and rubber boats, even if the ship hits the reef and sinks, the sailors will have a chance to survive on the sea and support until the rescue comes.

Therefore, the role of rubber is quite large, and it must be taken seriously......