"Oops, your lord is back!" Hearing Zhang Yunwen's roaring voice, Master Lu hurriedly stopped the work in his hand and greeted him.

Zhang Yunwen was about to teach Master Lu a lesson, but when he saw that he was disgraced and his hands were full of dirt, he swallowed the words of the lesson as soon as he reached his mouth, and turned to pat Master Lu on the shoulder, and said softly: "Master Lu has worked hard!" ”

Master Lu grinned "hehe", rubbed his hands, and saw dirt falling. "It's not hard, it's not hard! My lord, when you were leaving, I said, help you make the iron cylinder, and now I have finally made it, not a broken promise! ”

Zhang Yunwen was suddenly pleasantly surprised: "It's really done?" ”

Master Lu nodded with a smile, turned around and walked towards a room. Zhang Yunwen followed.

This is clearly a workshop. I saw that in the room, a stove was full of red coal, and the temperature must have been extremely high. Next to the stove, a half-human-high bellows leans against the stove, and the polished handle is the thickness of an arm, so you can guess how much force it takes to pull the bellows. Not far from the stove, there was a large iron pier for striking iron, on which tongs and a sledgehammer were placed. An iron tube in Zhang Yunwen's mouth lies horizontally on a wooden shelf.

Master Lu walked to the side of the iron cylinder, patted the iron cylinder, and suddenly made a "bang" collision sound.

"This guy weighs six hundred and fifty-four pounds, six feet long, half a foot in diameter, half an inch thick, and the thickness of the tail has reached one foot, which fully meets the requirements of adults. Adults, please take a look! ”

Zhang Yunwen had already stepped forward, and when Master Lu explained the data of the iron barrel, he began to observe the world's first steel cannon barrel.

This barrel is not rifled. This is Zhang Yunwen did not ask for a rifle. Although the rifled gun has a long range, great power and high accuracy, the wear and tear of the barrel is very serious. This was not the case with unbreezed smoothbore guns, which had much less wear and tear. Although the range and power have decreased a lot, Zhang Yunwen believes that in this era of cold weapons, even smoothbore guns are the weapons with the longest range and the greatest power.

Lean down to see if there are cracks, pores or other hard injuries on the barrel, and then measure whether the barrel is straight enough and whether the center of the circle is in the same straight line.

After nearly half an hour of checking, Zhang Yunwen nodded with satisfaction: "Master Lu has done a good job!" But when you minted this thing, did the data go down? ”

The reason why Zhang Yunwen asked this question was because of a common practice of ancient craftsmen. When they make things, they almost never record data, but rely on experience. In this way, only he can make this thing. Others want to learn unless they worship at his door. Such a broom is self-cherished, so that many crafts die out because of the death of a generation. Zhang Yunwen didn't want to see this situation happen again, so he added an article to the articles of association of the Equipment Institute, and all the experimental production process must be recorded, especially the data. If someone does not record it, it is a deduction; If there is a problem with the record, the person who recorded it will be responsible.

Hearing Zhang Yunwen's question, Master Lu hurriedly said: "Yes, it is recorded on paper, and it has been sent to the archives for the record!" ”

Zhang Yunwen smiled and said to Master Lu: "Old Lu, didn't you know what such a big iron cylinder was used for?" I'll tell you now! Come, come, sit over there, and speak! ”

After the two sat down, Zhang Yunwen started with the grenade, and after explaining the principle of the grenade, he slowly led it away, talked about the use of gunpowder, and finally explained the principle of artillery firing in detail.

After finishing speaking, Zhang Yunwen asked, "How is it, Lao Lu, is there any problem?" ”

Master Lu pointed to the iron barrel and said, "My lord, didn't you say that the barrel of this cannon is sealed on three sides, and then the gunpowder explodes, creating pressure to push the shell out of the unsealed side?" But the barrel you want me to make is clear! ”

"Then I have to trouble Master Lu to make another cannon latch and block the tail side!"

"Bolts? Is it just like a latch that closes and then closes? ”

"yes, yes!"

As he spoke, Zhang Yunwen took out a pen and paper and drew a schematic diagram of the cannon bolt. What he painted was a new Soviet-made artillery bolt in later generations, the kind widely used by our army, with good airtightness and strong impact resistance.

"Damn, so many parts! It's enough to do it for a while! Hey, no, my lord, this bolt still needs to be attached to the barrel in the end, so won't this barrel have to be reworked? ”

Zhang Yunwen smiled "hehe": "Then it depends on Lao Lu's ability!" After speaking, he paused, "I will ask Director Yan to transfer ten more masters to you, and they will be under your jurisdiction, and you will set up a team to be responsible for overcoming the artillery problem!" ”

As he spoke, he turned another page and drew a picture of the cannonball.

"Anyway, I'll leave it to you, just draw the cannonballs! See, here's the gunpowder! As for how much, we have to experiment! Forget it, when the time comes, after the cannon bolt is made, make a few of these conical cannons and pop them out, and then come to my house to find me! ”

Master Lu looked at this irresponsible Zhang Yunwen and said indignantly: "Listen to the adult!" ”

Zhang Yunwen smiled: "Lao Lu, don't complain like this, if you make this thing, not only will I have a reward, but Your Majesty may have a greater reward, maybe you can glorify your ancestors!" ”

Master Lu's eyes suddenly lit up: "Really? ”

"My lord, when did I lie to you!"

"Mm-hmm, that's just as well!"

Out of Master Lu's workshop, Zhang Yunwen found Yan Lide in a room.

"Master Yan, there are two things I need to talk to you about now!" Zhang Yunwen said straight to the point, "First, send ten master craftsmen and a number of apprentices to Master Lu, and Master Lu will be responsible for managing it!" Whatever they need, you give him something, anyway, in a word, fully support Master Lu's work. Also, this matter must be kept absolutely confidential and not let any outsiders know! If anyone dares to peep, kill them! Second, this official will make a statement to His Majesty that the Equipment Institute will be moved to our University ** Academy. First, you can not disturb other yamen affairs, and second, you can keep it confidential! You are ready to prepare for these two days, and if you can clean up, you can pack up first, and maybe you can start moving in two days! ”

Yan Lide quickly recorded these two things, and then said to Zhang Yunwen: "Don't worry, my lord, my subordinates will do these two things well!" ”

Zhang Yunwen nodded and left the equipment courtyard.

Next, he was going to go to the palace to explain the relocation to Li Shimin, but when he walked out of the door, he took a detour to the investigation institute to see what new information was there, and if there was, he could report it to Li Shimin by the way.

When I came to the investigation yard, I saw the pigeons rising and falling, and the personnel were running around, and they were busy.

When he walked to the room where Chen Quankang was, Zhang Yunwen was shocked to find that Chen Quankang was sitting at the bottom, and the person sitting in the middle was an old man over sixty years old with gray hair.

When a room of people saw Zhang Yunwen at the door, they all saluted: "I've seen the dean!" ”

Zhang Yunwen walked up to Chen Quankang and glanced at the old man. Chen Quankang hurriedly introduced: "My lord, this old gentleman's name is Hu Quan (this name is provided by Brother Rabbit Carnival), and he used to be an expert in charge of intelligence around Emperor Gaozu!" ”

That Hu Quan waved his hand and smiled: "Quankang, don't say that, what an expert!" It's old, it's young now! Look at your dean, and that Lin Ran, that can be called an expert! ”

Zhang Yunwen suddenly said modestly: "Mr. Hu has won the award!" ”

Hu Quan said: "Two days ago, there was information from the grassland, saying that the Xi, Khitan and other tribes had sent envoys south. However, when Quankang was negligent in handling this news, a day later, the intelligence bureau of the Ministry of War told His Majesty this information, and His Majesty was overjoyed, but on the other hand, he blamed the investigation institute for its unfavorable affairs, and demoted Quankang, and asked the old man to temporarily manage the military situation on behalf of Quankang, and teach him some things by the way! ”

Zhang Yunwen suddenly stared at Chen Quankang fiercely, and the latter immediately shrank his body.

"If that's the case, then there's Mr. Rahu!" Zhang Yunwen saluted Hu Quan.

"Eh, where is the dean! The old man also values the child of GHC! If you cultivate it, you will definitely become a great tool! Hu Quan stroked his beard and smiled.

After greeting Hu Quan for a while, Zhang Yunwen asked, "I wonder if there is any information recently?" ”

Hu Quan suddenly said: "I happened to receive a piece of information today, and I didn't have time to hand it over to Your Majesty!" If the dean has time, he can pass it on to His Majesty! After speaking, he opened a thick pile of files, took out a piece of paper, and handed it to Zhang Yunwen.

Zhang Yunwen took a look and saw that it was written: "Xi, Khitan and other envoys were executed outside the Great Wall!" ”

was stunned for a moment, then picked up the note, hurriedly walked out of the investigation institute, and walked briskly towards the Lin De Palace.

The envoy was killed, which is a big deal!