Later, after thinking about it for a long time, suddenly I don't know which tendon in my brain moved, which made him have a flash of inspiration, and remembered that the American in history (he doesn't remember what the name of this person is, this person should be called Rodman) once invented the inner mold water cooling technology, so that when casting the cannon, the speed of cooling and solidification of the inner wall of the cannon barrel exceeds the cooling rate of the outer wall, so that the inner wall forms a layer of stronger steel, which greatly improves the solidity of the artillery, and also greatly improves the yield rate. Even the scrap rate is basically zero.

In fact, the inner mold water cooling technology is very simple, that is, when making the inner mold of the cannon barrel, the inner mold is made into a hollow structure, there is a water inlet, and there is also a water outlet, the cold water is continuously injected from the water inlet, and the water outlet flows out, so that the inner mold of the gun barrel can be quickly cooled, absorb the heat inside the casting, and make the surface of the casting close to the inner mold solidify and cool faster, which is actually a process of self-tightening of the barrel.

So Yu Xiaotian said that he would do it, and immediately called the craftsmen of the artillery to transform the inner mold of the artillery, and cast the hollow inner mold from the new, and changed to cast the artillery with water-cooling technology.

In this way, after the test, the quality of the newly cast artillery is much higher than the quality of the cannon cast by the previous ordinary iron fan casting method, when the destructive test is carried out, the iron cannon cast by the new inner mold water-cooled technology can withstand the amount of charge, compared with the previous cannon increased by nearly forty percent, so that the cannon can be loaded with more propellant without increasing the weight at the same time, so that the shell obtains a higher muzzle velocity, and also obtains a larger range and higher accuracy.

However, it is impossible for artillery to blindly increase the amount of gunpowder, because theoretically, the best amount of artillery is not as much as possible, and some studies believe that the charge of artillery is best after the propellant is fully burned, and the energy generated is just enough to push the shell out of the barrel.

If the charge is too much, the gunpowder has not been completely deflagrated, and the shell will fly out of the muzzle, so that the gunpowder will be wasted, and no matter how much it is loaded, it may not be able to increase the muzzle velocity and power, but if the charge is too small, after the gunpowder deflagration is completed, the shell has not yet flown out of the muzzle, which will make the shell and the gun chamber rub, produce resistance, reduce the range and power of the gun and affect the accuracy of the artillery.

At this point, the Westerners have come to the front, they have understood this truth when using artillery, and at the same time, through the study of mathematics, they have made a cannon table, so that the gunner can easily know the way to hit the target, how far to hit the target, and how much gunpowder should be loaded when using solid bullets or grenades, so that the accuracy of the shelling can be higher.

However, as the Chinese who invented artillery, because no one has ever paid attention to this aspect of the problem, and has not formed a systematic research, the cannon casters that make cannons, that is, blacksmiths, each of them are stingy with their craft, for fear that others will learn their craft and steal their jobs, so they never communicate with each other, but only pass it on from generation to generation, so that since the invention of artillery, China's overall skills have improved very slowly, and even by the end of the Ming Dynasty, China's self-made artillery did not even have something to aim, Estimated aiming is based on the gunner's experience, and the accuracy of this cannon can be imagined.

However, on the other hand, Westerners, who were students, gradually formed a set of strict technical specifications during the use of artillery, and in a short period of time, they cast artillery far more than the Chinese, and in turn, the Chinese had to learn the art of cannon casting from Westerners, buy cannons from Westerners, and invite former students to teach them the art of cannon fighting.

This kind of thing makes many Chinese feel a little depressed when they think about it, but they have to admit that Yu Xiaotian is of course one of them, if it weren't for him traveling to this era and knowing a lot of cannon casting techniques invented in later generations, I'm afraid he wouldn't be able to make such a good artillery.

Under the premise of ensuring the strength of the cannon barrel, the thickness of the cannon wall has been reduced again, so that the weight of the gun body has been reduced, this kind of cannon can be installed on two kinds of gun carriages, when installed on the four-wheel gun carriage, it can be used as a naval gun and placed on the ship, even if it is a light ship that can only load six-pounder guns before, it can now be loaded with a new twelve-pounder cannon. In this way, once a large area of the Seawolf's warship is equipped, the Seawolf's fleet firepower can be increased by one level.

If it is mounted on a two-wheeled gun carriage, the total weight of this kind of cannon is less than 300 kilograms, that is, less than 600 kilograms, and a horse can pull it and drag it to follow the soldiers to maneuver on the battlefield, so that the soldiers can obtain stronger attack capabilities.

Even in mountain warfare, where it is not possible to use animal power to tow artillery, when necessary, the gun carriage can be disassembled, the barrel and gun carriage can be disassembled, and the mule and horse can be used to carry it in the mountains, which is the strongest firepower that the sea wolf fighters can obtain so far.

Even when the sea wolves are seriously lacking in animal power and marching on terrain that is not very difficult for a short distance, they can completely adopt the method of replacing animals and soldiers, relying on manpower to pull the artillery to follow the team, ensuring that under ordinary circumstances, the soldiers can obtain more effective fire support and fire suppression and the ability to attack fortifications.

And the twelve-pounder mountain howitzer that is now newly cast has undoubtedly become a product of the times, which has greatly improved the firepower of the Seawolf sailors and soldiers.

After the successful trial production of this short-barreled twelve-pounder howitzer, it immediately began to replace the production of six-pounder guns, and became the focus of the recent production of the Seawolf gun.

In addition, through various ways, the sea wolf has basically solved the supply problem of saltpeter, not only reserves a large amount of saltpeter, sulfur, freshwater and the two gunpowder workshops on Nanri Island have also produced a lot of gunpowder recently, and the gunpowder workshop of the sea wolf has been insisting on the production of granular gunpowder, so that the quality of the sea wolf's gunpowder has always been ahead of its peers and many officials and soldiers, even if it is gunpowder from Western countries, it can reach the current level of gunpowder produced by the sea wolf.

So the sea wolf is not afraid of the current government to cut off the supply of their materials, now after a year or two, the grain production on Nanri Island, although not high, but has basically met the needs of the people on the island and the sea wolf tribe, fresh water and chicken coops have not yet reached the level of self-sufficiency, but after more than a year of operation, the current food self-sufficiency capacity can also meet about seventy percent of the demand, and the remaining thirty percent of the demand can be purchased from land.

For this reason, the sea wolf has recently taken out a considerable amount of funds to purchase hundreds of thousands of catties of grain from Guangdong and Fujian, so that the price of grain in Fujian and Guangdong has been raised a little in recent times, and now the sea wolf has begun to run towards Guangxi and buy a large amount of grain there.

As the saying goes, there is food in your hands, and you don't panic in your heart, Yu Xiaotian knows the importance of food for the survival of sea wolves, once there is a natural disaster on land, there will be a large-scale famine, and when the time comes, he can take the opportunity to attract many disaster victims and follow him to Taiwan Island to settle down and make a living, which is the key to exploding the population.

In addition, the population of Tamsui and Chicken Coop is increasing, but the reclaimed land is still raw, coupled with the precipitation in Taiwan, the farmland drainage and irrigation facilities are not complete, and it is easy to suffer from floods.

Therefore, although the income of the sea wolf is getting higher and higher, but the expenditure is also getting bigger and bigger, no matter how much silver is saved, it is not effective to save more food and various materials, so the people in the council hall are very dissatisfied with Xiaotian's lavish spending, and the left hand goes in and the right hand goes out, so that the council hall has never saved much silver.

If it weren't for the fact that the Council Hall had to take into account the fact that it had to reserve enough money and reward money for the Sea Wolf Ministry, it was estimated that Yu Xiaotian would be able to spend all the money in the Council Hall.

However, the benefits are also obvious, the sea wolf tribe has sufficient food, various materials, and weapons in their hands, so that they can live a very peaceful life, and they don't have to worry about eating this meal.

Therefore, this time to deal with the attack and suppression of the official army, the Sea Wolf troops, especially these leaders, were full of confidence, and even a little bit of gearing up, just waiting for Xiaotian's order, and they took turns to do a big job.

The current Nanri Water Village is located in the southern corner of the Puxi Institute on the Zhongmen Peninsula, which is only a few miles away from Meizhou Island across the sea.

This is also the gateway of Xinghua Mansion, the north is Pinghai Bay, which belongs to Pinghaiwei of Xinghua Mansion, Puxi Thousand Households and Pinghaiwei just hold Pinghai Bay, close to Nanri Waterway, and Nanri Island across the sea, and the distance is only more than 30 miles.

Recently, because the governor of Fujian wanted to use troops against Nanri Island, he sealed ships in the coastal areas of Fujian and banned merchant ships from entering the sea, so the Nanri waterway, which was busy with shipping on weekdays, became much deserted.

Moreover, because the official army began to be stationed in Pinghaiwei and Puxisuo, warships also began to assemble towards Pinghai Bay and Xinghua Bay, which made the situation in the Xinghua Province much more tense, and even some fishermen were forbidden to go to sea, and the government's statement was to prevent fishermen from colluding with thieves.

(Commuter Pass!) I want a commuter pass! Hehe! I'm too wordy myself! Today's last shout! ）