Thinking of this, Xia Nan no longer questioned the actions of the technology maniac, and stated righteously: "You know, I have always been a strong supporter of your technological innovation, asking for money for money, asking for people to give people, since you think you want to start this project, I raise my hands in favor!" We are the men who want to be the strongest navy in Asia, and we can't be satisfied with the status quo! ”

Lin Weiye was very satisfied with his statement: "That's right!" Heavy artillery giants are the direction of the Navy's development, and they cannot be choked on because of a little difficulty. Pen ~ fun ~ pavilion www.biquge.info and scientific and technological things are not isolated, overcoming this problem, for the future casting of other cannons, especially heavy artillery, is also beneficial, can greatly reduce the scrap rate of large-caliber artillery. If we cast shore defense guns or naval guns of more than 24 pounds in batches in the future, we will not be able to avoid the problem of cracks caused by uneven internal and external cooling, and the larger the caliber of the gun, the more likely this phenomenon will appear......"

Xia Nan cooperated and said, "Then how to overcome this problem?" ”

"This problem has also been solved, we just need to copy the fruits of the labor of our ancestors. When I was mixing military forums and stickers, everyone knew Rodman's cannon casting method, and rookies could recite it backwards......"

"Rodman? Bulls Iron Triangle, help Flyer Jordan grab rebounds? "Summer South is a little dazed.

"I knew you were going to have a twist." Lin Weiye pursed his lips, "This Rodman is not Rodman, here is a technology for casting heavy artillery invented by Major Thomas J. Rodman of the Federal Army during the American Civil War. ”

Lin Weiye introduced, because the surface area is larger, the air circulation is faster, and the outer layer of the heavy gun with a larger wall thickness is cooled faster than the inner layer, which will lead to the crack problem mentioned above, so the American Major Rodman came up with a solution, because the specific heat capacity of water is much larger than that of air, so water cooling is much faster than air cooling, to let the inner layer cool first than the outer layer, then use water to cool the inner layer and the outer layer at the same time, or cool first than the outer layer, so that the cooling from the inside to the outside, the density of the inside is greater than that of the outside, not only will there be no cracks, It also increased the strength of the entire barrel, increasing the life of the heavy gun by five times in one fell swoop. Therefore, this method is also called internal mold water cooling technology.

The principle of this method is very simple, but the actual operation is not to directly inject water into the red-hot inner chamber, which will only rupture the barrel, but when casting the barrel, replace the mold used as the inner mold of the barrel with a hollow one, add a cooling water pipe in the middle, and then inject cooling water into it. Of course, the cooling water pipe must be made into a recirculating style to ensure the stability of the inner membrane temperature, such as using the U-shaped pipe mode to start filling water from the inside, so as to continuously circulate cooling.

"It doesn't sound too complicated, why are you so close to the enemy?" Summer Minami was a little puzzled.

Lin Weiye sighed: "The difficulty lies in how to control the cooling speed, and the water circulation speed is particular. If it cools too quickly, the inner tube will break, and if it is too slow, it will not achieve the desired effect, so it must be carried out at an appropriate speed. It took 10 years for Rodman to put forward the theory in 1844 to the experiment to demonstrate the scientific and reasonable technical parameters, and this specific parameter could not be found on the Internet at that time, so he could only guide the craftsmen to try it slowly, and several barrels have been scrapped, and you said that you can't see me recently, so I'm busy with this ......"

Xia Nan comforted: "Don't rush, take your time." ”

"Why not rush? I still want to get the bombardment cannon out before the battle with Zheng Zhilong, at this speed, it seems a bit ...... in suspense."

Xia Nan groaned: "Do you need to watch it every day now, can you pull away?" ”

Lin Weiye looked at him: "Then you don't have to squat every day, the water cooling pipe can be used repeatedly, now several senior cannon casting craftsmen are collecting experimental data according to my requirements every day, I am not the same in my absence, and I will not do it myself better than them...... Suddenly, I asked, is there something I want to do? ”

"I came to you today, I originally wanted you to accompany me to Jiangnan together, if it went well, I would go to Japan again, but I didn't expect you to get a cannon and encounter a technical bottleneck...... But it's crooked, you don't do things well, why don't you just go to Jiangnan with me to relax, maybe you're in a good mood, and your brain is suddenly enlightened? ”

Lin Weiye was amused: "This is not an invention, it is completely boring experiments and data collection, what is needed is not inspiration, but patience and careful ......."

"It's almost, anyway, it's useless for you to keep the water cooling pipe with a sad face all day long, so it's better to go on a business trip with me and relax." Xia Nan said seriously, "Life is short, work must be done, but we must also learn to enjoy life." Although we didn't know each other before, but we were able to cross together, it is not an exaggeration to say that we are reincarnated, there will be no second time for such a fate, two brothers in one world, I don't want you to live with iron bumps every day, and besides, we have passed the most difficult period, even if the cannon you said is not made, it is not the end of the world. ”

Lin Weiye was a little moved, and touched his head embarrassedly: "Don't say that I work too hard, you are in charge of such a big thing by yourself, and all aspects must be considered, whether it is business or war, I can't help you, I can only think of a way from my expertise." If you make more powerful weapons, you will have much less pressure to fight, which can be regarded as indirectly helping you. ”

Xia Nan waved his hand: "Okay, it's good that you and I understand, and it will be a bit numb to continue to praise each other." I went to Jiangnan this time to buy raw silk, and then sell it to Japan, to solve the problem of capital turnover in Qiongzhou camp, this is not a tour, but Jiangnan is the most prosperous place in the Ming Dynasty after all, although it is to do business, you can also have fun in the bitterness! You will go with me and see the scenery of Jiangnan. ”

Lin Weiye knew that Xia Nan wanted to take a break from work and rest physically and mentally, otherwise he was a technician and mixed with the team of business investment inspection, what role could he play?

He hesitated: "That...... Bringing family? ”

Xia Nan looked at him like an alien: "Didn't you travel when you were an engineer?" Whether it's talking about business or business, how can anyone leave with their families? We're not going on a road trip...... Besides, dealing with those fat silk shop bosses in Jiangnan, and having a request for help, maybe you have to go to a nightclub - oh, it should be called Qinglou at this time - ask a few pink girls to accompany you and have a few drinks. On this occasion, if you take your family with you, do you think your life is long or what? ”

Lin Weiye squirmed: "Isn't Qinglou a brothel?" We have families, so it's not good to go to that place, right? ”