Open an aircraft carrier to fight against Japan

Lin Yuan was so absorbed in thinking about the snow camouflage uniform that he didn't notice her change at all, and continued, "I want to see how the patterns on your skirt are printed."

Guan'er touched her hot face, she couldn't tell whether she was grateful or disappointed, and said, "This is very simple, many dyeing workshops know how to do it."

Guaner is right, this printing technique cannot be said to be simple, but it has already appeared in the Tang and Song Dynasties of China, and it has been greatly developed in the Ming and Qing Dynasties. Just talking about this technique can be written as a book Book.

Lin Yuan sent someone to the dyeing workshop, saying that he wanted to print irregular gray stripes on the white cloth, and the owners of the dyeing workshop readily agreed.

After the issue of military uniforms was resolved, Lin Yuan went to the ordnance department of the barracks again and asked, "What new equipment has recently arrived?"

The battalion officer had never seen an official like Lin Yuan come, so he quickly stood up and replied, "Tianjin Machinery Bureau presented 500 new Kuaili guns and 000 rounds of bullets!"

Lin Yuan said, "Show me the list."

The battalion officer quickly took the detailed list, Lin Yuan couldn't help feeling panicked after seeing it, and asked, "Why isn't there even a cannon in this list?"

The battalion officer quickly said: "This has nothing to do with the villain, they just didn't send it over."

Lin Yuan asked: "Jiangnan Manufacturing Bureau, Jinling Manufacturing Bureau, Tianjin Machinery Bureau, didn't they send a single cannon?"

The battalion officer said: "They really can't make it! It's much more difficult to make artillery than guns!"

Lin Yuan knew that what the battalion officer said was true. Although there were several large arsenals in China at that time, due to a series of disadvantages such as limited technical capabilities and bloated management organizations, their manufacturing capabilities had not been strong. There are no more than 0 guns of various calibers.

Lin Yuan asked again: "Then how many cannons can be used here?"

The battalion officer said: "There are only more than 50 that can be used."

Lin Yuan nodded, turned around and left the barracks. He first greeted Li Hongzhang and called a meeting of experts from Tianjin Machinery Bureau.

Lin Yuan originally wanted to recruit experts from Jiangnan Manufacturing Bureau, Jinling Machinery Bureau and several other large arsenals, but Jiangnan Manufacturing Bureau was far away in Shanghai, and Jinling Machinery Bureau was far away in Nanjing, so he had to find experts from Tianjin first.

When all the experts arrived, Lin Yuan said straight to the point: "We are in urgent need of artillery now. How is your factory's production progress?"

One said: "Our production speed can't go up! We don't know how to make large-caliber artillery, but we can make small-caliber guns, but the production is slow. First, our steelmaking capacity is insufficient, and the steel we can produce is not enough. It needs to be used to make firearms; secondly, our processing capacity is not enough. The steam boiler used to power the lathe in our factory has been bought for almost ten years, and it is now seriously aging. It cannot be processed; third, we have too few skilled craftsmen..."

He wanted to continue talking, but Lin Yuan waved his hand to stop him, and asked, "How is your production of gunpowder?"

The expert said, "It's no problem to produce 60 pounds a year."

A pound is about 0.9 catties, and much of the technology of that era came from Britain, so imperial units were widely used.

Lin Yuan nodded and said, "Well, let's design a cannon ourselves, which uses less material and is easy to manufacture."

Everyone stuck out their tongues in surprise when they heard this. You must know that at this time, Chinese arsenals rarely have weapons and equipment developed by themselves, and most of them are imitations. For "high-tech" equipment such as artillery, self-developed unimaginable.

How far can imitation and development differ?It can be said that there is a world of difference!For example, if a part is 5.0 mm long, you only need to make the part 5.0 mm in imitation and control the tolerance within the required range, but if you develop it yourself, you have to solve why the part is 5 mm, Instead of 4.9 mm or 5.1 mm, it seems that the difference is not big, but sometimes such a small difference can determine the success or failure of the entire system.

Because behind this is a complete set of theoretical systems and decades of practical experience. Others can sell you products, but they will never give you the experience and lessons in the product development process!

The expert didn't know Lin Yuan's background, thought it was just another layman who came to give orders blindly, and wanted to scold Lin Yuan angrily, but the high-ranking officials overwhelmed him, so he had to ask cautiously: "My lord, I don't know what kind of technology you want to develop. artillery?"

Lin Yuan said: "You may not have developed artillery, but you must have a deep understanding of the design process of artillery. First, when designing artillery, you should first determine several key parameters of the artillery. First, the caliber of the artillery; second, The weight of the shell is generally measured by the coefficient of the shell weight, which is the eighth power of dividing the weight of the shell by the caliber of the gun; the third is the initial velocity of the shell.”

Everyone was shocked when they heard this, and they all thought: "I didn't expect that Mr. Lin is an expert!"

An expert said with a smile: "My lord, but these parameters cannot be selected at once, and need to be tested repeatedly."

Lin Yuan said: "I have already helped you choose. First, the caliber is 6 mm. Second, the bullet weight coefficient is selected at 170. Third, the muzzle velocity of the shell is selected at about [-] meters per second."

An expert said: "My lord, at such a low speed, it seems that the barrel of this gun will not be very long."

Lin Yuan said again: "Exactly, the artillery we are going to make should be as light as possible and easy to carry, so we choose the length of the barrel at 600mm."

Everyone couldn't help but let out a burst of exclamation. The barrel of 10 times the caliber is indeed short enough. You must know that the barrel of a howitzer is generally between 15 times and 40 times the caliber, and the barrel of a cannon is generally between 80 and [-] times the caliber. between.

Lin Yuan went on to say: "The barrel doesn't need rifling either, just make it a smoothbore. A bipod is supported on the ground outside the barrel, and the breech of the gun rests on a square iron plate, which is used to share the recoil. The firing pin is installed on the breech of the gun, and we don’t need a pulling device. We directly put the shells in from the nozzle. When the shells slide down, they are directly installed on the firing pins. , the shells went out."

Everyone nodded, and an expert asked: "If this is the case, there must be a certain gap between the barrel and the shell. If the gap is too small, the shell may not be able to fire when it falls."

Another also said: "And this gap will also affect the shooting speed. If the gap is too small, the shell will slide down too slowly, which will affect the number of firings per unit time."

Lin Yuan smiled and said: "You don't have to worry about this problem. I will give you a formula, and you can just follow the calculation."

Everyone lowered their heads to imagine the shape of this cannon. To design a cannon, it is not enough just to have a general shape. There must also be a lot of specific data, such as the smoothness of the inner surface of the barrel, and how to use it between the hole and the shaft. way to cooperate and so on.

Lin Yuan said again: "I have the blueprint of this kind of artillery here, everyone can take it back and look at it, and make this kind of artillery as soon as possible."

An expert said: "My lord, please give this artillery a name."

Lin Yuan thought to himself: "I'm talking about a modern mortar, but it sounds too imposing if it's called a mortar." So he said: "The maximum range of our gun is only 00 meters, and the range is very long. It's near, why not call it 'Guardian Thunder Cannon'."

Everyone praised, Lin Yuan said: "Let's discuss the shells next."