But looking at the "thin" gun barrel and the cannon body that is longer than ordinary guns.

Zhang Mao still had doubts in his eyes.

Can this thing explode?

Not afraid of explosions?

He smiled and looked at Fang Jifan.

Fang Jifan said: "Shibo, I don't know how far the cannons in the border town can shoot and how accurate they are?"

"This..." Zhang Mao hesitated for a moment and said, "It's probably two or three hundred feet. What is the accuracy?"

Two or three hundred feet, this is too general.

In fact, smoothbore cannons, especially those with air holes in smoothbores, cannot be expected to have accurate ranges, completely... depending on luck.

Fang Jifan nodded. This was probably in line with the historical materials he knew. The artillery of the Ming Dynasty was mainly based on tiger squat cannons for a considerable period of time, with a short range and accuracy...it really depends on luck.

Later, Westerners began to appear, and there was exchange between the East and the West, the Red Cannon was introduced by the Ming army. The barrel of this gun was long and the thickness of the pipe wall gradually thickened from the muzzle to the tail, which was in line with the principle of the chamber pressure from high to the bottom when the gunpowder burned. There were cylindrical gun ears on both sides of the center of gravity of the gunboat body, and the cannon could adjust the firing angle with the amount of gunpowder to change the firing range. It also had a sight and a gate to calculate the ballistic according to the parabola, with high accuracy. And its best is the range. As a cannon, the range of the Red Cannon reached 300 to 500 feet.

The drawings provided by Fang Jifan are actually in the style of the Red Cannon.

Its characteristic is that the barrel is long but not as thick as the tiger squat cannon. However, compared with the ordinary red-clothed cannon, it is chosen to carve a yin line in the cannon chamber. This yin line is the rifle. Therefore, even compared with the historical red-branded cannon, its range and accuracy are much stronger.

Fang Jifan said with a smile: "Shi Bo, look at the hill opposite."

As he said that, he handed a telescope in Zhang Mao's hand. Zhang Mao looked at the mountain from afar, raised the telescope and looked at it. On the other side, there was a large area of ​​trees. There was a red rope tied to the trees. This area was several meters square. Zhang Mao frowned: "What are you doing?"

"We want to hit the forests with red ropes tied." Zhu Houzhao said with a smile on her face.

Zhang Mao was a little speechless. The mountain opposite was about seven or eight hundred feet. At this distance of seven or eight hundred feet, he was going to hit the target? Are you crazy?

Zhang Mao didn't believe it.

But in front of the prince, he didn't believe it, so he had to hold it in. As the British Duke who was young and was having fun playing in the cannon barrel, Zhang Mao knew the artillery very well and had to laugh dryly: "This place is probably more than 800 steps away from us... This... cough cough, Your Highness, you really have ambitions."

Just talking about ambition, it means that your heart is higher than the sky, but... it is naturally hard to say anything else.

"Lao Fang, let's open your eyes to the UK."

"Okay." Fang Jifan nodded happily, and then said, "Your Highness, you come and reload."

The shell was too heavy, and Fang Jifan's head hurt a little. This matter could only make Zhu Houzhao, who was in good health.

Zhu Houzhao didn't say anything, rolled up her long sleeves, thrust, and howled, uncovering the wooden box beside her, and a row of shells appeared in the box.

This shell is different from ordinary shells. Fang Jifan asked it to bloom the flowering shell. During the Hongzhi Dynasty, the shell was still solid. However, it was not until the Jiajing period, that is, decades later, that the Ming Dynasty began to invent the "poisonous firefly". This "poisonous firefly" was the prototype of the flowering shell. The shell contained "five liang of arsenic, sulfur, poisonous medicine". After ignition, it "beats the flying two hundred steps away, and it shattered and injured people.

Of course, Fang Jifan was a kind man. Although this flowering bullet was the first time he appeared, he did not load the unethical things such as arsenic, sulfur, and poison in the shell filled with gunpowder. He only ordered people to load steel balls, one shell, and a hundred small steel balls.

So, although this flowering bullet is hollow, it is actually extra heavy.

Fang Jifan was on the other side and began to load gunpowder, stuffing a pack of gunpowder into the muzzle, and then used a long-handled plug to fill the gunpowder firmly.

After that, Zhu Houzhao screamed, brought the shells and grinned his teeth and said, "Get out of here quickly." Then, he loaded the shells into the muzzle.

The barrel is very smooth, and because of the rifle, the accuracy of the shell must be closely matched with the inner wall of the cannon barrel. The shell reserved a long lead and then slipped into the bottom of the cannon barrel.

Everything is done.

Zhu Houzhao began to pick up the book.

The style of this red cannon was originally a cannon, but now it was tortured by Fang Jifan to become a howitzer.

But it doesn't matter, it's good if it's useful. He doesn't like solid shells, he likes to bloom, so he can just rush it.

Fang Jifan held the cannon barrel in his hand and couldn't help but sigh: "I'm so tired."

Zhu Houzhao glared at Fang Jifan with anger. You are also tired if you are a person who recharges gunpowder. What is this palace?

He was too lazy to pay attention to Fang Jifan, but he took out a book from his sleeve.

After the accuracy was enhanced, Zhu Houzhao soon discovered that this new cannon was regular during the test firing process.

The shooting of the shell has its own trajectory and is the principle of parabola. Therefore, as long as the gun ear is used as the central axis, the shooting angle is adjusted, and the target is determined using the life gate and the sight. After the shell is fired, the orbit is calculated, and the direction of the shell landing is finally calculated.

But this... involves mathematics.

Of course, Fang Jifan also gave some advice to Zhu Houzhao, and Zhu Houzhao seemed to have begun to get the trick.

Fang Jifan was about to command the gunner to calibrate the elevation angle and sight of the same cannon. Zhu Houzhao waved his hand: "I am here to get the abacus!"

“…”

Zhang Mao looked at it. Although it was quite well-organized, what the hell did you do? You still have to use abacus to set up a firecracker?

Someone had prepared an abacus. Zhu Houzhao was holding a charcoal pen and laying on the ground with her butt sticking out her butt. She spread the book open and compared it with several formulas for shooting in the past. Then the abacus in her hand was slacking off. Sometimes she put down her pen, reached out to calculate something, muttering to herself: "Three three is nine, nine nine eighty one, eighty one..."

This...this...Zhang Mao covered his heart.

You shouldn't have come, these two bastards are playing the big gods?

Finally, Zhu Houzhao roughly calculated what.

His eyes lit up: "The result is coming out, come on, 72 degrees above the angle, I came to the school to ejaculate in person."

Fang Jifan had to admire Zhu Houzhao, this guy is very particular!

After the scheming of the scheming, Zhu Houzhao was worried and looked at Fang Jifan: "Lao Fang, you have not installed your gunpowder incorrectly. If you install more or less, it will affect the calculation results of our palace."

Fang Jifan shook his head as if he was rattled: "Your Highness wants to hire people without doubt."

Zhu Houzhao said excitedly: "Okay, come here, ignite the fire for me.

Someone took out a torch and lit the leads of the shell first.

Cannonballs also have leads?

Zhang Maoman was suspicious.

The lead sputtered sparks.

At the same time, the lead wire inserted into the back wall of the cannon began to ignite. Zhu Houzhao and others had already fixed the cannon. Then, a long-lost roar started.

At the bottom of the barrel, one pound and two taels of gunpowder exploded instantly, creating a huge air wave. The air wave expanded wildly, pushing the shells, and the shells quickly rotated along the rifle. When the shells followed the flames, the shells were rifled and began to spin. With this inertia, the crazy-rotating shells directly headed towards the target.

This is the difference between smoothbore guns and rifled guns. After the artillery is rifled, the resistance of the shells in the barrel increases, and the gas energy can be obtained by the shells. The most important thing is that the rifle has the ability to rotate the shells. After the shells fly out, they greatly reduce the resistance in the air and enhance the accuracy.

The shell roared in the sky, like a meteor, smashing towards the opposite target.

Zhang Mao had big eyes. Soon, he found that his naked eyes were not enough. He hurriedly took out the telescope and raised it. He saw that the shell had already disappeared into the forest with a red rope tied.

Zhang Mao took a breath...

It actually... hit it.

Moreover... the range of the tiger squat cannon has more than doubled, and it means... it means shooting wherever it is.

Zhang Maoke is not stupid, so he naturally knows what this increase in range means. If this thing is placed in the army, it will be a magic weapon, a magical weapon, a magical one... He is amazing.

But at this moment, the hill opposite suddenly emitted a fire.

What...what happened?

Zhang Mao was a little confused and exploded again?

Can shells explode?

On the opposite hill, a forest with red ropes tied to the sky, and with a loud bang, the air waves exploded countless branches and leaves and jungle in a mess. The spark caused by the explosion ignited the dead leaves nearby, and then black smoke rolled.

Zhang Mao took a breath of cold air in an instant.

I couldn't help but say, "Damn it, it's amazing!"

Zhu Houzhao also raised the telescope and glanced at him, cheering.

Zhang Mao's face turned red with excitement: "This cannon is amazing, very powerful. Jifan, we have to go to the mountain to see. I want to see with my own eyes how powerful it is."

There is actually nothing to see about ordinary solid shells, just an iron lump fell from the sky, but Fang Jifan's thing can even be bombed twice, so accurate and with such a range, this is a magic weapon.

Zhang Mao was very eye-opening. How could he not know what a terrible result would be caused by the appearance of this thing?

He was like a child. Without waiting for Fang Jifan to respond, he excitedly walked towards the opposite hill.

Zhu Houzhao and others had to follow him.
Chapter completed!