Tian Yujin squatted on the school grounds, fiddling with the curved artillery converted from the tiger squat cannon, or mortar.

The structure of the mortar is actually very simple, it is a small-caliber small gun with low muzzle velocity. The caliber of the curved gun that Tian Yujin fiddled with was very small, probably only about two and a half inches in caliber. The barrel also looks thin, no different from a regular Tiger Squat Cannon. In fact, this cannon was transformed from the tiger squat cannon of the Ming army, so simple that Tian Yujin could operate it alone.

The only thing that caught the eye was that the bottom end of the barrel was modified with a bracket with a screw fixture. That bracket allows the cannon to adjust the angle of fire at will.

Tian Yujin poured gunpowder into the curved gun, and the fans around Zhu Youzhen subconsciously blocked in front of Zhu Youzhen. The way in this Tian Yu is unknown, and the fans are worried that something uncontrollable will happen.

Tian Yujin loaded a small cannonball with a wooden bottom into the chamber of the curved gun, adjusted the muzzle of the cannon to a small tree 400 meters away.

"Bang!"

The cannonball flew out with black smoke, smashed six or seven feet away from the small tree, and exploded with a bang.

Zhu Youzhen's eyes widened, and his face gradually became happy.

Tian Yujin fiddled with the curved gun again, adjusted the firing angle, and fired again. This time, the small flowering bomb smashed steadily within half a foot of the small tree, and the small tree was blown off with a bang.

Zhu Youzhen's face was already full of joy, and he stroked his beard and nodded.

Tian Yujin walked up to Zhu Youzhen and arched his hand and said, "Holy Lord, with this curved artillery, you can attack the enemy in the trench. At the beginning, the new army of Jingying was defeated by the Jiangbei Army in Huguang, and the reason was that the Jiangbei Army had this curved artillery. “

"It's extremely easy to make, and even the most ordinary cannon casters can do it. If the saint is in a hurry, he will collect tiger squat cannons from all over the country for transformation, and the speed will be faster. “

Zhu Youzhen nodded and asked, "What is a 'Formosa' rifle?" “

Tian Yujin said: "The Formosa rifle was originally the standard rifle of the Tiger Army, but it was learned by Hongyi by coincidence and renamed the Formosa rifle. After that, this gun was passed on to the Jiangbei Army by Hongyi and became the standard equipment of the Jiangbei Army. “

"This gun is very powerful, and the students demonstrated it for the Son of Heaven."

Wang Dehua looked at Tian Yujin, but he didn't dare to let him play with the gun in front of the Son of Heaven, and said: "Tian Juren is resting and resting, let's try the gun." “

Tian Yujin nodded and said, "Okay, I'll teach my father-in-law!" “

Under the guidance of Tian Yujin, Wang Dehua loaded the rifle with ammunition, aimed it at the target 60 zhang away, and shot it over.

Neither the first nor the second shot hit. But Wang Dehua was not discouraged and fired ten shots in a row. In the last five shots, he hit three times.

Tian Yujin arched his hand towards Zhu Youzhen and said: "Holy Lord, if you are a skilled soldier, if you use this rifle to hit a target sixty zhang away, you can hit eight or nine out of ten shots. “

Wang Dehua stopped shooting and handed the rifle to Zhu Youjian.

Zhu Youzhen looked at the rifle up and down, and his face was already full of smiles.

"Good! With this good weapon, the new army of Beijing is like a tiger with wings! “

"The name Formosa is too tongue-in-cheek, so let's call it a mighty gun in the future!"

Tian Yujin knelt on the ground and kowtowed, and said, "The Son of Heaven is Shengming!" “

Zhu Youzhen said: "It's just that now I have to build cannons and guns, and I don't know how many gunsmiths I have to recruit, and the amount of money consumed is too much." In this way, the new army in Beijing can't train as much as before..."

Zhang Guanghang arched his hand and said, "Holy Lord, there is no need to worry about this matter. “

Zhu Youzhen was stunned and asked, "Does the elder have a way to raise money?" “

Zhang Guanghang said: "Shengshang, now the scholars in the north and south of the river know that the Shengshang has no intention of abolishing the imperial examination, and they all know that this civil service examination is caused by the King of Qi's persecution of the Shengshang with soldiers. I heard that the soldiers in many places have launched a fundraiser to raise money to donate to the new army in Beijing. I'm afraid that in less than a month, there will be truckloads of silver transported to the capital. “

Zhu Youzhen looked at Zhang Guanghang and was stunned for a while.

However, he laughed out loud and said, "Heaven and earth will work together." That way, I don't have anything to worry about. “

####

Li Zhi looked at the twelve-meter-high dam and was stunned for a while.

Although the reinforced concrete dam was designed by Li Zhi himself, Li Zhi threw the work to Jing Yishan after drawing the design drawings. Now that Li Zhi sees this dam again, he has an unreal feeling, as if he has returned to the afterlife before the crossing.

The hydropower station, a building symbolizing modern industry, appeared in the late Ming Dynasty, which is really eye-catching.

The dam was not opened, and the river water was flowing out of the drainage pipes next to it. The flow of water was clearly blocked in the drain and the flow rate was not fast.

Li Zhi walked up the stairs next to him to the top of the dam.

As far as the eye can see, the valley behind the dam has been transformed into a lake. The lake was four or five miles long and wide, sparkling, and looked very beautiful.

There are a few idlers fishing in the lake.

Jing Yishan is still as rude as before. He organized the construction of the dam, and he was quite complacent, waving his arms and saying loudly in front of Li Zhi: "In order to build this dam, we mobilized 2,000 laborers, built it for three years, and used 327 tons of steel bars and cement..."

Li Zhi smiled, interrupted Jing Yishan's words, and asked, "The generator set has been arranged?" ”

Seeing Li Zhi interrupting his words, Jing Yishan was a little unhappy, and frowned and did not answer Li Zhi.

Gao Ligong next to him hurriedly came up to the round and said, "Lord Mingjian, the hydroelectric generator units in this dam have been installed. ”

Li Zhi smiled: "Go and see." ”

Everyone walked down the dam again and walked to the generator room on the east side of the dam.

A tall two-person generator sits in the middle of the machine room, making a rumbling sound. The whole machine is wrapped in an iron shell on the outside, and it is not clear what it looks like inside.

This generator was not designed by Li Zhi himself.

Gao Ligong said with a smile: "Lord Wang, this generator was designed by Chen Yiming, a professor of electricity at the School of Engineering of Fanjiazhuang University. ”

Chen Yiming and Li Zhi knew him, and he was Li Zhi's first helper when he was researching generators in the past, and later as the captain of the power group, he specialized in the production of generators in state-owned factories. Chen Yiming had a great spirit of study, and studied all the physics and chemistry books written by Li Zhi by himself, and then after the establishment of Fanjiazhuang University, he went to the university as a part-time professor.

Now that he has the knowledge imparted by Li Zhi, he is able to design generators independently.

With a hydroelectric generator, the concrete dam designed by Li Zhi can generate electricity.

The principle of a hydroelectric power station is also very simple to say.

When the water flow is blocked by the dam, it accumulates behind the dam and increases the water pressure, and it has the potential energy to do work. The hydropower station opens an opening at the bottom of the dam to divert water, and the water flows from the diversion pipe, drives the turbine blades to rotate through the turbine, and finally drives the generator connected to the turbine to rotate.