"Students, this is the earth-shaking thunder, our army and the Jin people can fight several times in a row, and this earth-shaking thunder has played a lot of roles. He is also one of the main weapons of our army on the battlefield now. ”

Jia Gui drew a parabola on the blackboard, then marked the coordinates, and continued:

"The flight speed of the earth-shaking thunder in the air is about 20 meters per second, and the farthest thrown according to the 45-degree parabola, then at a distance of 50 meters, the earth-shaking thunder should fly out of about 70 meters, and it takes 3.5 meters. The time from ignition to explosion of the earth-shaking thunder is 6 seconds, considering the influence of wind speed, generally after igniting the lead, it must be thrown out in two clicks, otherwise, when the earth-shaking thunder flies to a certain distance, it may have exploded and will not work at all. ”

"If it's 30 meters away from the other person......"

Jia Gui calculated for a moment and continued: "Then the distance of the earth-shaking thunder flight is 42 meters, and the time is 2.1 seconds, and you can count three times before throwing it."

Mathematics and physics are the basic for all the trainees who participated in the training, because a considerable part of the knowledge of mathematics and physics must be applied in all firearms training.

Li Weiguo raised his hand, stood up and asked:

"Instructor Jia, when we found that the earth-shattering thunder exploded on the ground in the battle with the enemy, it was far less lethal than the explosion in the air, why is this?"

Jia Gui nodded, and Li Weiguo sat down.

"The question asked by student Li Weiguo is quite good! So, why is that, students?"

"If the earth-shaking thunder explodes after landing, the ground will be more dispersed and the lethality caused by the explosion will be greater, and if the ground is soft or muddy, the explosion force of the earth-shaking thunder will be weaker. If it explodes on the ground, the shrapnel will shoot out in a ring, and the shrapnel will hit the enemy at the waist position, and the lethality will be much reduced.

"If it explodes in the air, because there is no differentiation on the opposite side, the shrapnel will be more powerful, and the range of damage will be greatly increased."

The students carefully took notes, and some of them carefully looked at the military textbooks in their hands, and the whole class was silent.

As a craftsman in the firearms manufacturing workshop of the "China Iron and Steel Production Division", Jia Gui was born as a scholar and had work experience in the firearms manufacturing workshop of the Great Song Dynasty Military Weapons Supervisor.

For Jia Gui, perhaps the luckiest thing in this life is to be able to accept Wang Song's words and deeds, show his strengths, and teach the so-called "strange skills" to more people.

Like him, the former officials of the Great Song Dynasty Weapons Prison now not only hold important positions in the Weapons Department of the Xuanfu Division, but also serve as instructors in the "Lecture Martial Arts Hall".

There are even many people who go directly to the army and serve as middle and senior officers in the army, which can be regarded as a way out.

"Students, in the last class, we talked about drawing maps, and in this class, we will learn how to make sand tables."

Liu Zheng, the same old official of the Great Song Dynasty, held chalk in his hand and began to write the words "how to make a sand table" on the blackboard.

"According to folklore, Qin Shi Huang built a large topographical model in his mausoleum. There are mountains, hills, cities, etc. in the model, and mercury is used to simulate rivers and seas, and mercury is used to circulate with mechanical devices, which should be the earliest sand table, which has a history of more than 1,300 years.

Liu Zheng talked eloquently, and the students below also listened with relish.

"The Qin Tomb may be a legend, but the following is recorded in the history books. "The Book of the Later Han Dynasty • The Biography of Ma Yuan": In the eighth year of Jianwu of the Han Dynasty, Emperor Guangwu conquered Tianshui Hao and Qiang, and the general Ma Yuan "gathered rice for the valley and pointed to the situation", and Emperor Guangwu suddenly had the feeling of "captive in my eyes", which was the earliest sand table operation. ”

Therefore, the function of the sand table is to restore the local terrain, so that the rivers and valleys can be fully revealed, "captured in my eyes", and better ambush and block the enemy. ”

Like the cadets of the artillery section, the cadets who can draw maps and make sand tables are also the best among them.

Drawing maps, making sand tables, students need to learn slightly more advanced mathematics such as drawing, vertical and horizontal scales, and contour lines.

The production of the sand table was completed on the drawing of the map, Liu Zheng spoke with relish, and the students below also listened attentively.

Many of them understood that after this study, they would be sent to the land of Yanyun to measure and paint the dimensions, and the purpose of this was to make a sand table to prepare for the army's northward march.

"To make an accurate sand table, there are four main steps. 1. Set the sand table box; 2. Make a good model; 3. Set up terrain and buildings; 4. Do a good check-up. So, how to set up the sandbox box? First of all, make the outer frame structure of the sand table according to the required size, and nail the wooden board, then spread 4 cm thick yellow sand on the sand table, compact the sand, and then draw the appropriate size mark in the area where the terrain model needs to be placed, as well as the corresponding text. ”

"Everyone must remember!" Liu Zhengdao:

"To build a sand table, the main way is to pile up the landform, and the method is: select the lowest contour line and relevant landform feature points, and transfer their positions from the topographic map to the sand surface, calculate the height of the insertion at the top of the mountain, waist, foot of the mountain, etc. according to the vertical scale, and pile it up against the topographic map."

Unlike Jia Gui and Liu Zheng, Zhao Shizhong, who also served as an instructor, was a real Hedong refugee, but because he was young, he had studied, and he was there when the iron factory was founded.

The Loyal and Righteous Army practiced strict separation of education and military, and only the basics were learned in military schools, while experienced officers were led on the battlefield.

At the beginning, Zhao Shizhong was still a little nervous, but after a few classes, he had settled down, and he became confident in the rhythm of the familiar rhythm.

"After the shell is fired, the gunpowder residue in the barrel is scrubbed clean, one is safety, and the other is the cooling effect, a total of two times, absolutely not sloppy, nor can it be changed. If there is a little spark or high temperature, there is a high chance of an explosion when the charge is charged! After the chamber is cleaned, the gunpowder silk bag is put into the chamber, then compacted, then the shell is inserted, and then compacted, and then the officers, that is, you, use this iron needle to pierce the small hole in the back of the chamber and put the fuse, and then ignite. You have to do it repeatedly until you are very proficient before you can go out and teach the gunners in the army! ”

Now, Zhao Shizhong is standing on the podium with confidence. Holding a thin copy of the "Artillery Operation Procedures" in his hand, he was explaining to the following officers, including artillery officers Zhang Xuezhi and Liu Hongjin.

"When it comes to the battlefield, the gunners and the people aim and load ammunition in accordance with the operating procedures of the artillery, and a small accident may not only injure themselves, but also cause a major military accident and affect the success or failure of the army!"

The officers in the artillery department were jokingly called the "top students" in the military academy by the cadets, because there were many people who signed up for the artillery department, and there were many people who brushed them down.

Although geometry, trigonometry and other mathematics subjects are the easiest in the artillery department, there are still a large number of officers who cannot pass after training, and those who can pass in the end are the "scholars" inside.

Despite this, the cadets of the infantry section are still full of confidence, and often wash their mouths and say wildly: no matter how fierce the artillery is, in the end, it is not our infantry who will solve the battle with a knife and a shot!

As for the cavalry section, the most officers participated, because this section required the least knowledge to learn and master, and a group of senior officers in the army flocked to it. If it weren't for the clear quantitative requirements of the military academy, I am afraid that more than half of the military academy are cavalry officers.

This is also the case, whether it is the infantry section, the artillery section, or the baggage section, the notes in other people's hands are thick and stacked, and the cavalry section is two pages.

As for the Sailor Section, because firearms are mainly used, the officers of the Sailor Section also have to be trained in firearms, and at the same time they must learn the corresponding knowledge of sailors.

The Sailor Section is the most boring and severe, and officers have to learn not only basic firearms knowledge, infantry training content, but also water and sea training content, as well as artillery repair and maintenance.

"On the water or at sea, the guns used should be wiped down frequently to ensure that they are dry and do not rust. But it must be specially sealed, and it must be checked frequently to prevent moisture and affect the battle. ”

"Do not look directly at the sun with a clairglass, strong sunlight focused through a telescope, like a magnifying glass to gather light, will burn your eyes; When wiping the lenses, use the attached flannel or other soft, clean cloth, and do not use stolen objects or rough objects!"

Since there was a glass factory in Hebei, the officers in the loyal army were equipped with clairvoyant scopes, that is, telescopes for later generations, and each officer of all sizes had one.

"As an officer, first and foremost, a soldier, the level of military training is the foundation of each and every one of them. On the battlefield, the officers have to take the lead, and if they can't run or fight, it will be a shame for the entire officer. One general is incompetent and brings disaster to the three armies, and the officers should not gamble the lives of the soldiers on their battlefields. Otherwise, the officers will be the sinners of the whole army and the laughing stock of the world!"

Wang Song had already told them these words on the first day he entered the "Lecture Martial Arts Hall", and everyone had already memorized them.

Every day when the red sun rises, you can see groups of officers shouting trumpets and running neatly on the teaching field. In addition to the daily half-day cultural theory classes, there is also a small half-day military training to ensure that their physical fitness is not left behind.

Originally, these officers were warriors in the army, and the assessment of force was basically a piece of cake. And for many people, they prefer this kind of military training to boring classroom knowledge, and the battles between various subjects are also extremely fierce.

"Weiguo, you will definitely do it!"

"Li Zhuang, don't lose the face of our navy!"

Li Weiguo took a long stick wrapped around the head of the stick, put on protective gear, and walked into the field, facing Li Zhuang on the opposite side.

On the teaching ground, other students who were walking and chatting all gathered to watch this "battle of naval artillery" that was commonplace after dinner.

Such a competition is carried out almost every day. The winning side is elated, and the losing side is brave after shame.

"Li Zhuang, it's too late to admit defeat!"

Li Weiguo touched the barrel of the gun and said coldly.

"Li Weiguo, is there no one in your artillery department, and you were sent out, isn't this looking for abuse!"

"Don't be ashamed, win first! Your navy is powerful on the water, and when you get to the ground, you're a soft-footed ghost!"

The cheers and shouts outside continued to sound, and the cheers of the "water army" and "artillery" were even more enthusiastic.

The stabbing was very intense, Li Weiguo was careless, stumbled under his feet, and was already stabbed in the chest by Li Zhuang with a shot and fell out.

The cadets of the Sailors Section cheered, while the Artillery Section was listless.

Li Weiguo took off his protective gear in frustration, and the cadets of the artillery department surrounded him and comforted Li Weiguo.

A group of students dispersed one after another, and the teaching field returned to its original appearance, and the students who walked and chatted in twos and threes, and some training freaks, were running on the teaching field, sweating their sweat.

Li Zhuangzhi was full of pride, and when he passed in front of the hall of the martial arts hall, he inadvertently saw Li Bao coming out accompanied by a large group of sailor generals, and everyone looked solemn.

Li Zhuang couldn't help but sigh in his heart, just after winter, Li Bao came all the way from Liuqiu, I'm afraid something big has happened.

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