The core concept of Minnie bullet is expansion, and when Alan talks about the concept of expansion, the slaves who are still working in the distance have confused expressions.

They weren't selected for the new bullet making team, but the old bullet craft will eventually fade over time, so orcs in the bullet workshop can stay in the workshop and work as they listen, hearing as much as they can.

Since they also had to make round buckshot at hand, most of the leon orcs could only hear with their ears.

The few orcs have workstations facing directly into the blackboard area, so they can be more attentive to the lectures.

"This is the shape of the new bullet, and it is difficult to grind a sharp cone with the center of the circle aligned with the bottom of the bullet with the existing process, so our bullet will be a round bullet that is close to a cone, its body is a little longer than a round buckshot, and its tail is cylindrical."

With a bang, the white chalk fell, and a round-headed cylindrical bullet appeared in front of the orc's eyes.

Many skilled workers thought that the conical bullet was already a very powerful principle analysis, but they didn't expect that this time Allen completely changed the shape of the bullet and changed it to a conical cylindrical bullet.

"Why extend the stigma, can't you just use a conical warhead?" There are orcs who are confused.

Alan glanced at him, explained the role of the cylindrical projectile, and drew a perspective view of the interior of the cylindrical projectile, with a cone-shaped cavity inside.

Obviously, this cavity is not a design flaw, but the core concept of this inflatable bullet.

"Here's an internal perspective view of the tail of the bullet, and the conical cavity inside will help the bullet fit snugly into the barrel."

"Lord Allen, you just said that the size of this bullet will be a little smaller than the barrel, and since it has become smaller, what about the gap between the bullet and the barrel?" Daisy stopped, a little confused.

Under Allen's full-level teaching, he already had a complex perspective of the inside of the Mine bullet in his head, as well as a perspective view of the barrel with the rifled engraving.

When the two perspectives were deduced in his head, he found that the bullet was stuffed into the barrel, leaving a very noticeable gap, which was obviously a flaw.

"Don't worry, as we all know, our muskets use the power of the explosion of gunpowder to propel bullets into a circular flight and pierce everything in their path."

With that, Alan pointed to the cone-shaped cavity at the tail of the bullet on the blackboard, and quickly drew a cork with chalk, as well as the granular black powder behind the stopper.

After drawing the black powder, the arm moved down, and another drawing of the black powder burning violently at the tail of the bullet, "When the gunpowder burns in the barrel, we can see the gunpowder gas pushing the cork into the cavity and propping up the cylindrical tail of the bullet. ”

He paused, and then drew a picture of the decomposition step of the bullet that had expanded, and then drew a chaotic cloud of gas, "After the tail is expanded, it will engage with the rifle of the barrel to form a tight and high-pressure gas seal, and the bullet rotates out along the rifling in a huge thrust, followed by the air flow power link." ”

"You can see that when the air passes through the cone bullet, the gas is also spinning, which makes the trajectory of the bullet more stable and does not deviate from the trajectory easily."

After some explanation, it was already the eighth minute, and the group of orcs woke up like they had just woken up from a dream, and kept saying, "I see! ”

After explaining the principle, and then to the part of how to make the Minne bullet, Alan misestimated the time this time, and spent a few more minutes teaching people, a total of twenty-two minutes of lectures, before the new process was completely passed on to the orcs.

When he left the blacksmith shop, the orcs of the bullet workshop gathered around the blackboard, looking over and over again, as if they were seeing a rare treasure.

"I didn't expect to have so much knowledge in building a small bullet, it seems that I have to work hard to gnaw on the junior high school physics at home." Daisy, the project leader, looked at his notes in front of the blackboard, thinking about the physics book.

What Alan is talking about today is a relatively in-depth content, and orcs who have no foundation have a hard time learning, so they quickly picked up the small notebook and wrote down the notes on the blackboard into the small notebook.

The orcs who make round bullets do not have this treatment, they can't stop the work at hand, and they have to continue to do it.

In order to prevent the leakage of confidentiality, the contents of the blackboard will be wiped with the blackboard after the new team has taken notes.

"Daisy-sama, let's get off work tonight, let's study physics together."

"yes, yes, I don't re-study physics, I feel a little hard to learn."

"If it weren't for Lord Allen's personal teaching this time, it would have taken us at least a month to understand these contents."

When Daisy heard his subordinates say this, he also felt that it made sense, "Okay, let's form a group to study physics tonight." ”

Bullet workshops generally do not work at night, and tomorrow there are more places in the town that need candles to open night shifts, and the supply of candles is insufficient, and the brightness of candles is not enough, so people in dangerous industries naturally wait until daytime to work.

The orcs who don't go to work don't have much entertainment at night, and the orcs who love to learn tend to gather together and light a few candles to study.

However, physics is really difficult to learn, and the test paper practice questions assigned by Allen make the orcs see that their heads are big, which makes the scumbags resist.

Now parents don't beat their children, they just take out a pile of test papers, and when the child causes trouble, pressing the child to do the test paper is the biggest punishment.

One can imagine how courageous the group of the Bullet Workshop was determined to re-learn physics.

……

When Alan returned to the administration building, Windsor was still typing in his seat, and the other administrative staff went back to work to continue their work.

"How does it feel that others don't try to use a typewriter?" Alan asked, a little curiously.

In the morning, I saw a group of people circling around the typewriter, but I didn't expect to come back in the afternoon and the office room was empty.

"They don't know the roots of the words, I'm afraid they will use it badly, so I don't dare to try it for them." Windsor stuck out her little tongue, got up obediently, and took the little cotton pad where her ass was hot.

Reluctantly, she returned to her seat and saw a blank piece of paper on the countertop, with the name of the Ministry of Education Hoss, the content of which was to arrange the midterm exam date and ask Master Allen for the test questions.

Windsor handed the paper to Alan and said, "November is coming, have you thought about the questions for the midterm exam?" ”

"Well, the questions are all in my head, and I used to think it was troublesome to copy, so I just used a typewriter to type out the test questions for each subject." Alan smiled slightly, flipped through the test papers in his head, and it was as dense as an ocean.

Windsor saw Alan's smile, and she smiled gently.

If students from the outside world see the smiles of the two, they will definitely shudder, because with Allen with a typewriter, there will be more and more test papers.

Alan saw Windsor's smile, as if she was expecting a reaction from the students.

He suddenly thought of those elementary school students who were troubled by all kinds of problems, especially the Olympiad questions or something, it was too devilish.

"Ahem, I didn't mean to make things difficult for them, my topic will try to test everyone's level, and I won't make things difficult for the sake of making things difficult." Alan is colorful.