The room goes through the late Ming Dynasty, and the back door leads to North America at the beginni

Then, Liu Sheng tried firing iron bullets and shotguns, and successively used wooden stakes, mounds of earth, and straw men in armor as targets to conduct many experiments.

The final result was that the live ammunition of this squatting tiger cannon could reach a distance of more than 630 meters.

As far as the live ammunition can hit, it can cause damage to enemies at that distance. At most, the size of the damage is different from the number of enemies damaged.

In actual combat, when firing live ammunition, the angle of elevation must be as small as possible, or even fired flatly like a cannon, so that the live ammunition can be used to bounce and kill more enemies.

Moreover, iron bullets kill the most enemies, followed by lead bullets and stone bullets last.

As for shotguns, the longest range is only more than 300 meters.

And because the shooting area is fan-shaped, it is best to fire shotguns when most of the enemies are located more than 200 meters away.

After many consecutive experiments, there is no sign of deformation in the barrel of this squatting tiger cannon. It is worthy of being a special steel pipe used for high-pressure liquid transportation in later generations.

However, as a front-loading smoothbore cannon, its slow firing speed really left Liu Sheng a bit speechless.

After firing a cannon shell, the remaining fire embers and sparks in the barrel must be extinguished with water, and the barrel must be cleaned. Generally speaking, the longer and larger the cannon, the more time this process takes.

According to the general firing method of the Ming army, after cleaning the barrel, propellant should be loaded first, then sesame balls should be loaded and tamped to seal, and then live ammunition or shotgun shells should be loaded. If you are particular about it, fine soil should be added after the marbles to compact it for secondary air-tight sealing. Finally, add a fuse to the breech fire hole (fire door), ignite and launch.

Even a skilled artilleryman wouldn't be able to do it within two or three minutes; a person with average training would probably take more than five minutes to fire one round.

The 70-centimeter-long squatting tiger cannon he modified should be longer than most squatting tiger cannons in the Ming and Qing Dynasties. Although the inner wall of the barrel is smoother, it is estimated that it still takes three to five minutes to fire.

If it is a Hongyi cannon with a longer and thicker barrel, the interval must be longer. If it can fire every ten to fifteen minutes, it is extremely fast.

In addition, even if water is added to clean the barrel every time and the heat is dissipated, the barrel will still overheat after more than ten rounds in a row, and it will take at least a quarter of an hour to stop firing again; it will take half an hour to an hour to stop to completely cool down.

Therefore, if the cooling time after a dozen rounds is included, the average firing interval of the front-loading smoothbore artillery during this period is longer.

The Tiger Crouching Cannon can also be equipped with more artillery, so that the cannon can be rested without stopping. However, the Hongyi Cannon cannot be used. The cannons are too expensive, so it is impossible to put two in one place, and it is difficult to move them.

However, the Hongyi cannon is not what he should consider now. In a short period of time, the rebel army will be enough with the squatting tiger cannon.

In the next few days, Liu Sheng saw eight more 8-centimeter thick steel pipes and took them to the iron workshop to transform them into squatting tiger cannons.

With the experience and skills accumulated on the first day, the subsequent steel pipe modifications will be faster. Basically, three or four doors can be modified in one day.

It took four days before and after, ten 70mm caliber tiger squatting guns modified from later thick steel pipes entered Liujiazhai's arsenal.

Of course Liu Sheng would not leave these squatting cannons in the warehouse to gather dust.

Of the 300 to 400 standing troops that had been trained in actual combat, Hong Niangzi and the other three only brought one team back to their respective stations, and the remaining three posts stayed at Liujiazhai.

In addition to daily training, he helped build stone towers around Liujiazhai. In order to strengthen Liujiazhai's defense system, Liu Sheng selected four more places to build gun towers around him.

Each of these four gun towers has a fixed gun emplacement, which can be used to fire the Crouching Tiger Cannon, and in the future, it can also be used to fire the Hongyi Cannon.

The turret is divided into two parts: the turret and the stone tower. The turret is in front and the stone tower is in the back.

The stone building is made of thick bricks and stones, with shooting windows on three sides and a door on one side. There is also a wooden ladder in the middle that can go up to the roof. The roof is circular, with a skylight in the middle and a parapet half as high as a person on the edge.

It is a pity that there is a lack of limestone around Tianmu Mountain and Huachuying, so it is impossible to build a cement factory for the time being, otherwise the blockhouses will inevitably be built stronger.

One gun tower can station a small group of standing troops (30 people). As for how many people the enemy needs to attack, it depends on the level of the enemy's army.

Including the original one post, Liujiazhai now has four standing troops.

Liu Sheng selected thirty people from them and formed a tiger artillery team.

A group of three, a gunner, a reserve gunner, and an ammunition hand. The gunner is equipped with a short sword and a crossbow, the reserve gunner is equipped with a shield, and the gunner is a sword player.

In other words, even if the enemy is close, the artillery team still has considerable combat effectiveness.

If the elixir runs out, the artillery team can still fight with cold weapons.

After the Tiger Cannon Team was formed, Liu Sheng asked them to carry the Tiger Crouching Cannon on their backs and train in Tianmu Mountain every day.

The content is mostly about marching and simulated loading of ammunition. There are very few live ammunition exercises for actual ignition and firing, which ensures that each gunner can fire one shot a day.

There is no way, Huabu has not yet found a stable source of saltpeter and sulfur, and its gunpowder storage is limited, so it is impossible to spend too much on training.

In addition, Liu Sheng also took the Tiger Artillery Team to Dashui Ping Village, Xizou Maling, and Mopan Village for field inspection and training.

Because after completing the training, Xizomaling and Mopanzhai will send a tiger squatting artillery team, and Dashuipingzhai will send at least two to assist the defense of these places.

As for the Tongshan Iron Mine, Liu Sheng's instructions to Yang Heqing were: If the enemy is too strong to hold, lead his men to retreat. Even if the iron mine is lost, it can be regained later.

Finally, Liu Sheng also used his time at night to make twenty more flintlock guns.

And 30 elite crossbowmen were selected from Liujiazhai's four-post standing army, of them were equipped with flintlock rifles, and the remaining ten were still equipped with crossbows, and were included in the pro-army sequence together with the Tiger Artillery Team.

Since then, the number of Liu Sheng's troops has increased to 180.

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Because Huachuying and Liujiazhai needed to transfer supplies to each other for several days after the actual combat training, Liu Sheng simply opened the door on the first floor and left it unlocked for the time being.

In this way, it is also convenient for Zou Runniang to visit Li Xiangyun and change shifts.

On the night of September 15th, Liu Sheng had dinner at Liujiazhai. When he returned to the first floor of the villa, he heard Zou Runniang and Li Xiangyun talking inside.

"Young lady (Li Xiangyun's maiden name), Manager Cai is a very nice person. Although he is six years older than you, he is barely half a scholar, and he is smart and capable. He has no parents and only has one little sister.

If you get married, you can become the hostess immediately, and you will be close to her, how nice it is. "

"Mom, I've told you many times that I don't want to get married yet."

"After your birthday tonight, you will be sixteen. How long do you want to wait until you don't get married?"

"The Red General is already eighteen, and he is not married yet."

"She used to be an entertainer, and she was also the leader of the rebel army. How can you compare with her? My dear, I understand what you mean, but the leader doesn't mean that to you. Haven't you noticed after all this time? "

Liu Sheng did not expect that the mother and daughter would mention him, and felt that he could no longer eavesdrop, so he immediately coughed and came to the back corridor.

When the mother and daughter saw Liu Sheng, they quickly stood up and saluted: "Chief."

Liu Sheng smiled and said, "Why didn't Xiangyun tell me that it's her birthday today? If I did, I would definitely give you a day off."

Li Xiangyun said: "It's good for me to stay here and watch the door and read. I don't need to take a holiday."