After leaving the military academy, Li Yuanji went directly to the Academy of Sciences.

Speaking of which, I haven't been there for a while, and although there is progress or something, I will report it immediately, but when it comes to it, there has been no news for almost half a month, right?

And the last report still said that the Academy of Sciences wanted a steam engine to carry out rifling portrayal.

Compared to human power, the power provided by the steam engine can be more stable and faster.

In addition, a steam engine is actually not very much, but it is a little troublesome to make, and the Academy of Sciences does not use him to pull the car, but just depicts rifling, which can be pulled, and it is good not to be frustrated.

Compared with the manufacture of bullets, the manufacture of firearms is not too much of a problem.

Again, the biggest difficulty lies in the production of the barrel.

The seamless steel pipe proposed by Li Yuanji made the craftsmen only depressed to drill out one by one, which was a time-consuming and laborious job, and the requirements were relatively high.

Fortunately, through various chaotic experiments in the iron-smelting workshop, several harder materials were found, or it was more suitable to be called alloy steel, but the only drawback was that no one knew what this thing should be called. I just know what I put in it.

These alloys are used to make drill bits, and then drill little by little.

When I came to the Academy of Sciences, it was already dark, but it was still a busy scene.

Precious candles are like worthless here, it is never possible to see them lit one by one, and every time they are lit, they are in a row, a pile, and the whole workshop is illuminated.

"Your Majesty......"

Looking at the scene in front of him, Li Yuanji suddenly felt that he was a little outdated.

No, it's a little underestimating the scientists of these academies.

There are many benefits of opening up their thinking, which Li Yuanji knows very well, so he will spare no effort to develop their thinking, in order to make all kinds of ideas explode and continue to emerge, and at the right time, these ideas can come in handy.

For example, now, Li Yuanji sees this.

A steam engine was working and several wheels were spinning.

If you don't look closely, it looks like a train.

The difference is that these wheels are vacated, the center of the wheel is opened, it becomes a hollow, and a buckle is added at each end, and a barrel is fixed on it, and as the wheel turns, the barrel is also rotating rapidly.

Because it is in the air, the drag will be less, so the wheels will rotate faster, and for a steam engine, such a load is no different from nothing.

In addition, the wheels have also been modified, which are much smaller than normal wheels, and the wheels can rotate faster.

Li Yuanji saw the scene he saw in later generations, one side was a drill bit, manually controlled by a human, and the other end was a high-speed rotating wheel, carrying a solid barrel.

In order to prevent the failure of the barrel caused by shaking, the drill bit is also fixed on a huge base, which may not be able to shake not only one person, but two cows.

It is a concrete structure, one meter deep underground, and it is said that just such a base uses more than 50 bags of cement and more than 500 catties of steel bars.

Five wheels can process five barrels at the same time, which makes the barrel a little faster.

"Who came up with this?" Li Yuanji couldn't help but be a little curious.

"Your Majesty, this is what Director Liang came up with, but at the beginning, there was a drill bit over there, but the stability was not enough, so I changed the position, and the result was quite good, and the pass rate has reached more than ninety percent. And the production speed of this method is also very fast, a drill bit can open a barrel in an average hour, just such a machine, a day can make 60 barrels, remove the scrap rate, at least 50 barrels per day. Xiao Jing hurriedly responded.

"What do you think about passing or not?" Li Yuanji is a little curious, there will be professional equipment in the future, and you will know if you are qualified or not, but now there is no equipment, how do you see whether it is qualified or unqualified?

"There are no cracks, no deformation, and the other is to listen to the sound, and there is irrigation ......" Xiao Jing said several incredible detection methods in a row.

Well, Li Yuanji felt that he could only obey.

What else can you do but worship? Could it be that their methods are not working? This is impossible, other people's methods are not good, and there is no way to do it yourself, so what can you use to prove it?

"What about rifling? Why didn't you see it? Li Yuanji continued to ask, this steam engine was used to depict rifling, but when he arrived, he didn't see rifling, but saw that it was drilling.

Xiao Jing's face stiffened, and he was a little embarrassed to say: "Your Majesty, it doesn't seem to be very reliable to use this to portray rifling, and the scrap rate is 100 percent ......."

Li Yuanji was stunned, but with Xiao Jing's explanation, he also understood why there was a 100% scrap rate.

Rifling is no small task, on the contrary, it is more difficult than drilling a solid barrel, and it is more than twice as difficult.

In later generations, Li Yuanji did not know how many steps a gun barrel would have to go through from a steel ingot to a finished product, but now, this step is also cumbersome.

The first is to melt the ingot, then pour the molten steel directly into the abrasive to make it look like the current barrel, and then pinch the head and remove the tail to cut off the excess at both ends.

Then there is grinding, where the entire barrel is polished smooth and shiny, and only then is it placed on the machine for drilling.

After drilling the hole, it is necessary to polish it twice, but this time it is the inside of the barrel that is polished, which is more demanding, and now a skilled craftsman can only polish two barrels a day at most, and because it is manual grinding, the quality cannot be guaranteed, so the scrap rate at this stage is also very high.

If there is a yield of more than 90% when drilling, then after grinding, there are still 50 out of 100 barrels.

However, the Academy of Sciences also has an idea about grinding, and they are planning to use the same method as drilling, at least the machine can grind it to the minimum, and what people need to do is just control the entry and exit of the barrel.

After the polishing is qualified, it is the portrayal of rifling.

First of all, the distance of each line has strict requirements, and the straight-line distance between the two yang lines and the yin line must be exactly the same, even if there is an error, the error can only be one percent of a hair.

Of course, this requirement for them is that there can be no error.

The speed of the machine is fast, no matter how much people control it, it is impossible to keep up with the speed of the machine, so there is a very serious problem with the rifling carved by the machine, the lines are uneven, and even many lines can be drawn repeatedly.

And Li Yuanji's requirement is again 1:11, that is, the spiral length of the rifling is 11 times the caliber of the barrel.

Of course, this seemingly complex question did not bother these scientists.

First, I used the model, constantly tested and studied, and finally found out the length and distance of a rotation, and then through brainstorming, we made a very high-tech device.

The equipment is a wooden frame, and then a large number of steel products such as gear buckles are used, and they are debugged by a linkage device.

The end result is that it is only necessary to check whether the linkage is working properly on a regular basis.

As for the operation, it is even simpler, a manually controlled turntable can be rotated.

Because everything is already in place, the faster it turns, the faster the barrel leaves and rotates, and the slower it turns, the slower the barrel leaves and rotates.

After this time it is completely gone, it will turn in reverse, and the barrel will follow and gradually get closer to each other for a second rifling engraving.

And to depict a rifling, you need to turn it back and forth a hundred times, that is, fifty times.

And Li Yuanji is considered to be the most difficult rifling portrayal, here is not the most difficult, although there are errors, but at least more than sixty percent of the yield can be guaranteed.

In this era, this efficiency is not low.

Of course, the main thing is that there is a problem with the internal polishing, which leads to a hundred solid barrels, after drilling, there are about ninety left, and after the internal polishing, it is directly reduced by half, and even only forty are left.

The overall yield rate of 20% is low enough, or even unacceptable.

The rifle was actually designed a long time ago, although I don't know how effective it is, and this will have to wait until the bullet is researched before deciding.

And now there is no downtime, it is studying the production process to see if it can be improved, and then improve the yield rate and increase the production efficiency.

As for the caliber of the gun, there was really no way, so Li Yuanji had to move out the big killing weapon of millimeters, centimeters and meters, and set the caliber of the rifle to 8 millimeters.

Why not 7.62 or 5.56?

The reason is very simple, the performance of the propellant, the current propellant is the same as the propellant of rocket artillery, the difference is only that the particles are smaller.

Although the granular form can be burned more fully and provide greater kinetic energy, but its own performance is like that, no matter how much it is planned, there is always an upper limit to the kinetic energy it can provide.

Therefore, we can only take a relatively large caliber and load as much propellant as possible to increase the kinetic energy of the bullet, so as to increase the speed and firing distance of the bullet.

As for the style of the rifle, there is nothing to look at, in Li Yuanji's opinion, the single-shot hand-pulled rifle is actually the same, and there is not much difference in appearance.

But when the sample gun was held in his hand, Li Yuanji still had an inexplicable sense of pride......