Lin Yuan was thinking about the snow camouflage uniform, and didn't notice her change at all, and then said, "I want to see how the pattern on your skirt is printed." ”

Wan'er touched her hot face, and couldn't tell whether she was happy or disappointed, and said, "This is very simple, many dyeing shops will do it." ”

Guan Er is right, this printing process can not be said to be simple, but it has appeared in the Tang and Song dynasties in China, and has been greatly developed in the Ming and Qing dynasties, and this process can be written into a book alone.

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

The problem of military uniforms was solved, and Lin Yuan came to the ordnance department of the barracks again and asked, "What new equipment has come recently?" ”

The battalion officer had never seen such a big official as Lin Yuan, so he hurriedly stood up and replied, saying: "Tianjin Machinery Bureau presents 500 new fast guns and 20,000 bullets!" ”

Lin Yuan said, "Show me the list." ”

The battalion officer hurriedly took the detailed list, and when Lin Yuan looked at it, he couldn't help but panic in his heart, and asked, "Why doesn't there even a single artillery piece in this list?" ”

The battalion officer hurriedly 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 harder to make an artillery than a gun! ”

Although there were several large-scale arsenals in China at that time, due to a series of shortcomings such as limited technical capacity and bloated management organization, the manufacturing capacity has not been strong, and the number of artillery pieces of various calibers that these arsenals can produce in a year is only 200.

Lin Yuan asked again: "Then how many more artillery pieces 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 the Tianjin Machinery Bureau.

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

When the experts arrived, Lin Yuan said straight to the point: "We urgently need artillery now, I don't know what the production progress of your factory is?" ”

One said, "Our production speed can't go up!" We can't build large-caliber artillery, we will build small-caliber guns, but we do it slowly, first, our steel-making capacity is insufficient, and the steel-making steel has to be used to make guns; Second, our processing capacity is also insufficient, our factory used to power the lathe steam boiler bought for almost ten years, now it is seriously aged, from time to time to stop for repair, so the rifling can not be processed; Thirdly, we have too few skilled craftsmen......"

He was about to continue, but Lin Yuan waved his hand to stop him and asked, "How is the production of gunpowder in you?" ”

The expert said, "It's okay to produce 600,000 pounds a year." ”

A pound was about 0.9 catties, and many of the techniques of that era came from the United Kingdom, so imperial units were widely used.

Lin Yuan nodded and said, "In this way, let's design a cannon by ourselves, which uses less materials and is easy to process and manufacture." ”

When everyone heard this, they were so surprised that they stuck out their tongues, and they wanted to know that at this time, the Chinese arsenal had very few weapons and equipment developed by itself, and most of them were imitations, and it was unimaginable that such "high-tech" equipment as artillery could be developed by itself.

How far can imitation and development be? 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 this part 5.0 mm when copying, and control the tolerance within the required range, but if you develop it yourself, you have to solve the problem of what this part is 5 mm, not 4.9 mm or 5.1 mm, which seems to be not much different, but sometimes it is such a small difference that can determine the success or failure of the whole system.

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

Where did that expert know about Lin Yuan's background, thinking that it was another layman who came to command blindly, and wanted to reprimand Lin Yuan angrily, but the official was crushed to death, so he had to ask cautiously: "My lord, I don't know what kind of artillery you want to develop?" ”

Lin Yuan said: "You may not have developed artillery, but you must have a deep understanding of the design process of artillery. First of all, when designing an artillery, several key parameters of the artillery should be determined: first, the caliber of the artillery; Second, the weight of the shell, which is generally measured by the weight coefficient of the shell, which is the weight of the shell divided by the eighth power of the caliber of the artillery; Thirdly, the muzzle velocity of the shell. ”

When everyone heard this, they were all taken aback, and they all thought: "I didn't expect this Lord Lin to be an expert!" ”

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

Lin Yuan said: "I have already helped you choose, first, the caliber is 60 millimeters, second, the bullet weight coefficient is 6, and third, the initial velocity of the shell is about 170 meters per second." ”

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

Lin Yuan said: "Exactly, the kind of artillery we want to make should be as light as possible and easy to carry, so we chose the length of the barrel at 600 mm." ”

Everyone couldn't help but let out a burst of exclamations, the body tube of 10 times the caliber is indeed short enough, you must know that the body tube of the howitzer is generally between 15 and 20 times the caliber, and the body tube of the cannon is generally between 40 and 80 times the caliber.

Lin Yuan continued: "The body tube doesn't need rifling, just make it smooth. The outside of the body tube is supported on the ground by a bipod, the tail of the gun is against a square iron plate, this iron plate is used to share the recoil, the firing pin is mounted on the tail of the gun, we do not need to pull the hair device, directly put the cannonball from the nozzle, when the cannonball slides directly on the firing pin, the firing pin triggers the primer, and the primer further ignites the propellant, and the cannonball is shot out. ”

Everyone nodded, and an expert asked, "If this is the case, there needs to be a certain gap between the barrel and the shell, if the gap is small, the shell may not be able to fire." ”

Another also said: "And this gap will also affect the rate of fire, if the gap is too small, then the shell will slide too slowly, and it will affect the number of shots per unit time." ”

Lin Yuan said with a smile: "You don't have to worry about this problem, I will give you a formula, and everyone can calculate it." ”

Everyone lowered their heads to imagine the shape of this cannon, and if they wanted to design a cannon, it was not enough to have a general shape, but also a lot of specific data, such as the finish of the inner surface of the barrel, how the hole and the shaft were matched, and so on.

Lin Yuan said again: "I have the drawings of this kind of artillery here, you can take it back and look at it, and build this kind of cannon as soon as possible." ”

One of the experts said, "Your Excellency, please give this artillery a name." ”

Lin Yuan thought to himself: "What I'm talking about is a modern mortar, but if it's called a mortar, it doesn't sound too imposing." So he said: "The maximum range of our cannon is only 2,000 meters, and the range is very close, so it is better to call it 'Guards Thunder Cannon'." ”

Everyone praised one after another, and Lin Yuan said, "Let's discuss the cannonballs." ”