Of course, camphor has a certain degree of volatility, and mothballs use this principle to repel insects. Therefore, in order to prevent the camphor on the surface of smokeless gunpowder particles from volatilizing, Marlin specially sealed the passivated smokeless gunpowder with oiled paper to isolate the air. In this way, the camphor, which is isolated from the air, will not evaporate.

In fact, in the original history, the British bibase propellant was plagiarized from Nobel's idea, but the passivating agent was replaced from camphor to petroleum jelly.

In fact, Marlin can now obtain Vaseline as well. Because, Vaseline is actually petrolatum extracted from petroleum.

But the problem is that now the production of oil is too low, dozens of catties per day, and with such an output, there is even less Vaseline that can be extracted.

Therefore, Marin thinks that it is better to use camphor as a stabilizer at present. As for Vaseline, we will have to wait until the oil production is higher in the future. Of course, now it's time to send someone to study the extraction of Vaseline. When the extraction technology of Vaseline matures, Marlin plans to explode the production of smokeless gunpowder. After all, even the British bistatic propellant is nothing more than a mixture of nitrocellulose, nitroglycerin and petroleum jelly, and the production technology is very simple. If it weren't for the fact that the primer was too mysterious, and the production method could not be found on the Internet in later generations, so Ma Lin would not understand, and maybe Ma Lin would have been able to directly make metal bullets in later generations.

Moreover, Marin understands the structure of AK47, and it is not complicated to manufacture, even the small blacksmiths in the border villages of Pakistan and Railway can make it. But no matter how good the village blacksmiths are, they don't know how to make a primer. They can make all kinds of guns, but they can't produce their own bullets, so they can only buy them from professional chemical factories.

Therefore, in later generations of China, the technology of controlling the primer fire was not leaked, and the proliferation of guns was controlled. Even if you create an AK or a big black star by hand, there are no bullets, and it's no different from a burning stick.

Marin felt that he was so hard, he obviously mastered the formula of the propellant at the level of science and technology in the 20th century, but he didn't know how to deal with the core primer. So, what if he made smokeless gunpowder? You have to use an old-fashioned clockwork lighter to light the fire......

Even, because the barrel was coiled and forged, Marlin did not dare to use the more powerful British bi-base propellant, only the oldest version of French B gunpowder. In addition, the charge was reduced as appropriate, so as not to blow up the barrel of the gun, which was not strong......

Marin suddenly regretted that he hadn't gone to the School of Chemistry to further his studies before the crossing, and if he knew how to make primer fire, he would have started to repair AK47 a long time ago. When the time comes, as long as there is enough ammunition, he will be able to push all of Europe with a regiment. In front of thousands of AK47s, the gathering of soldiers and horses from all over the world in this era is not enough for him to "suddenly"......

It's a pity that he's just a liberal arts student. Even with the 20th century propellant recipe, you can only play with front-loading guns, which are extremely slow to reload. And the loading speed of the front-loading gun, in the face of a large-scale cavalry charge, is not enough to cut people...... So, the current musketeer is still a younger brother and needs the protection of the spearmen......

……

However, with safe smokeless gunpowder, Marin could consider a more powerful cannon. Marin was influenced by Napoleon and Bismarck, and was also a big bomber who believed that "truth is only within the range of a cannon".

In fact, not only Marin, but also the Chinese army in later generations was also a supporter of the idea of "artilleryism". When fighting the South Vietnamese monkeys, our army washed the ground with artillery shells every day, so that the opponent's jungle warfare skills had no room to be displayed.

Although the Yue Monkey has rich experience in jungle guerrilla warfare, he even forced Lao Mei away. However, in the face of the Chinese army at their doorstep, their tricks didn't work. The old United States had to transport artillery shells halfway around the world, but Huaxia directly used trains to pull artillery shells to the front line one by one, and it was impossible to finish washing the ground with shells every day. Then, the regular army of Yue Monkey on the opposite side was dumbfounded, not as threatening as their villagers who were good at sneak attacks.

With a safe and reliable smokeless propellant, the restless heart in the heart of the Martha bomber was stirred......

Ma Da felt that the current cannon was too weak to even blast the stone city wall, which was really not very practical. Therefore, he decided to make a high-powered artillery out, not for anything else, but to be able to blast the enemy's walls open and break through the enemy's warships......

Of course, with the current level of science and technology, it is somewhat difficult to engage in rifled guns. Because, the rifling of the gun was very deep, it was difficult to carve by hand, and it was difficult to produce. Moreover, rifled guns have a much shorter life than smoothbore guns. The reason for this is that rifling is easily smoothed.

Therefore, Ma Da decided to engage in smoothbore guns, high-powered smoothbore guns. When it comes to smoothbore guns, the pinnacle is none other than the Pexan cannon made by the French in the mid-19th century. Its super-large caliber of 68 pounds directly ended the era of wooden ships for battleships. Because, no wooden boat can withstand the smashing of a 68-pound iron ball......

What Marin wanted to do was this kind of Peksan cannon that ended the age of wooden ships and led to the birth of iron-hulled warships. This is the pinnacle of smoothbore artillery, whether it is used to bombard wooden battleships or the walls of this era, it is easy and pleasant.

The only problem, presumably, is that heavy cannons are much more difficult to cast than light cannons. Because, the wall of the heavy artillery is very thick, and during the pouring process, it is easy to have structural problems. As soon as something goes wrong, the artillery is scrapped.

Fortunately, Marin understands the "Rodman casting method" with water-cooled inner membranes, which can greatly improve the success rate of casting heavy cannons. Otherwise, he really didn't have the confidence to cast such a behemoth as a 68-pounder gun.

Moreover, in order to improve the quality of the artillery, Marin did not intend to cast the cannon from ordinary steel, but from the finest Inconel steel, that is, the legendary stainless steel.

Ever since Haidel's younger brother Wiltz discovered small chromite in Cuba, Marin has been able to make stainless steel. Although the stainless steel cannon is not as effective as tungsten steel, Marin now has no tungsten in his hand, so he can only take out the best chrome-nickel alloy steel to cast the Peksan cannon.

Once this super-powerful cannon is forged, then Marin will be invincible at sea. No matter what kind of battleship the enemy had, it was directly sunk by a single shot......

Even if you don't use the original flowering shell design, only solid shells, the 68-pound shells of the Pexan cannon can easily smash open the side of the enemy ship, causing it to leak and sink. Moreover, there were no heavy battleships in this era, and the side sides of the battleships were generally not thickened, and they could not withstand the 68-pound iron ball shells.

With stainless steel heavy artillery and a powerful smokeless propellant, Marin felt that once he got it, his navy would have to sing "Invincible is a Loneliness". Without him, he is really invincible......

Once this ultimate heavy artillery is made, the navies of other countries will have to GG. What if Spain and Portugal knew that America was a rich continent? Dare to grab? Let me introduce you to an invincible heavy artillery, the Pexan Cannon...... Come, come, your ships have sunk to the bottom of the sea to "lurk"......