It's just that, looking at the 'thin' barrel, and this barrel that is a little longer than an ordinary gun.

In Zhang Mao's eyes, there were still many suspicions.

Can this thing be fried?

Not afraid of blowing up?

He smiled and looked at Fang Jifan.

Fang Jifan said: "Shibo, I don't know how far the artillery in the border town can shoot, and what is the accuracy?" ”

"This ......" Zhang Mao only hesitated slightly, and said, "There are about two or three hundred zhang." Precision...... What is it? ”

Two or three hundred zhang, this is too general.

In fact, smoothbore artillery, especially those with special air holes in the smoothbore, cannot be expected to have an accurate firing range, completely ...... Look at luck.

Fang Jifan nodded, this point was probably consistent with the historical materials he knew. For a long time, the artillery of the Ming Dynasty was mainly based on tiger squat artillery, and the firing range was not long, and the accuracy was ...... It's really a matter of luck.

Later, Westerners began to appear, and there was an exchange between the East and the West, and the Hongyi cannon was also introduced by the Ming army, such artillery barrels are long, and the thickness of the pipe wall gradually thickens from the muzzle to the tail of the gun, which is in line with the principle of high pressure from high to bottom when gunpowder is burned; There are cylindrical lugs on both sides of the center of gravity of the gun body, and the gun can adjust the firing angle with this axis and change the firing range according to the amount of gunpowder; In addition, it is equipped with a front sight and a light gate, and the trajectory is calculated according to the parabola, and the accuracy is very high. And its best is the firing range, as a cannon, the range of the Hongyi cannon reaches 300 to 500 zhang.

The drawings provided by Fang Jifan are actually the style of the Hongyi cannon.

Its characteristic is that the barrel is long, but there is no tiger squat cannon thick, but compared with the ordinary red-clothed cannon, but choose to be in the barrel, engraved with a yin line, this yin line, that is, rifling, therefore, even compared with the history of the Hongyi cannon, its range and accuracy, is much stronger.

Fang Jifan smiled and said, "Shibo, look at the mountain opposite. ”

Saying that, he handed a telescope to Zhang Mao's hand, Zhang Mao looked at the mountain from afar, raised the telescope and looked at it, the opposite mountain was actually a large number of trees, there was an area, the trees were tied with red ropes, this area was several zhang square, Zhang Mao frowned: "What are you doing?" ”

"We're going to hit the woods with red ropes." Zhu Houzhao danced with his eyebrows.

Zhang Mao was a little speechless, on the opposite mountain, there are seven or eight hundred zhang, this distance of seven or eight hundred zhang, still want to shoot at the target? Crazy?

Zhang Mao didn't believe it.

But in front of the prince, he didn't believe it, and he had to hold back, as a British duke who played happily in the barrel of the gun, Zhang Mao knew too much about artillery, so he had to laugh dryly: "This place is more than 800 steps away from me...... This...... Ahem, His Royal Highness the Prince, it's really Top Gun. ”

Just talking about Top Gun, in fact, it means that the heart is higher than the sky, but ...... The rest, naturally, is not easy to say.

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

"Okay." Fang Jifan nodded beautifully, and then said, "Your Highness, you come to load." ”

The cannonball was too heavy, and Fang Jifan's skull hurt a little, and this matter could only be done by Zhu Houzhao, who was in good health.

Zhu Houzhao didn't say anything, rolled up his long sleeves, tied them, screamed, and opened the wooden box on the side, and in the box, a row of shells were exposed.

This cannonball is different from ordinary cannonballs, Fang Jifan called it a flowering shell, in the Hongzhi Dynasty, the cannonball was still solid, but it was not until the Jiajing period, that is, decades later, that the Ming Dynasty began to invent the 'poisonous fire flying', this 'poisonous fire flying', is the prototype of the flowering bomb, the bullet is filled with "arsenic sulfur poison five taels", after ignition, "will fly two hundred steps away, shatter and hurt people."

Of course, Fang Jifan is a kind person, although this kind of flowering bomb is the first time it has appeared, but it is not in the cannonball filled with gunpowder, arsenic, sulfur, poison and other immoral things, he only in it, ordered someone to fill steel balls, in one cannonball, there are 100 small steel balls.

So, don't look at this flowering bomb as hollow, but in fact, it's extraordinarily heavy.

On the other side, Fang Jifan began to load the gunpowder, stuffed a packet of gunpowder into the muzzle, and then filled the gunpowder with a long-handled wooden stopper.

After that, Zhu Houzhao screamed, carrying the cannonballs, baring his teeth and cracking his eyes: "Get out of the way." Then, load the shell into the muzzle.

The barrel is very smooth, and because of the rifling, the accuracy of the shell must be seam with the inner wall of the barrel, and the shell has a long lead reserved for it, and then it slips into the bottom of the barrel.

It's all done.

Zhu Houzhao began to pick up the book.

The style of this Hongyi cannon was originally a cannon, but now it is alive and has been tossed into a howitzer by Fang Jifan.

But don't tighten, it's good to be useful, he doesn't like solid shells, he likes flowering, it's good to make a splash.

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

Zhu Houzhao glared at Fang Jifan angrily, you are also tired of filling gunpowder. What is that Hongu?

He didn't bother to pay attention to Fang Jifan, but he took out a book from his sleeve.

After the accuracy was enhanced, and soon in the process of test firing, Zhu Houzhao found that this new type of artillery was regular.

The projectile has its trajectory, which is the principle of parabola, so as long as the ear is used as the central axis, the angle of the shot is adjusted, and the target is determined with the goal and the front sight at the same time, and then the direction of the shell's landing is finally calculated through the calculation of the trajectory after the shell is ejected.

And this ...... But it involves arithmetic.

Of course, Fang Jifan also pointed out Zhu Houzhao, and Zhu Houzhao seemed to have begun to get the hang of it.

Fang Jifan was about to command the gunner to calibrate the elevation angle and crosshair of the same artillery, Zhu Hou waved his hand: "Come to the palace, take the abacus!" ”

“……”

Zhang Mao looked at it, although it was quite orderly, but ...... What the hell is the abacus, you still have to use the abacus when you put a cannon battle in your house?

Someone had already prepared an abacus, Zhu Houzhao took the charcoal pen, pouted his ass very seriously and lay on the ground, spread out the book, compared with the several formulas of the previous shooting, and then the abacus in his hand snapped, sometimes put down the pen, stretched out his hand, pinched something, and muttered to himself: "Three three is nine, nine nine eighty-one, eighty-one......

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

I shouldn't have come, these two bastards, they're dancing gods?

Finally, Zhu Houzhao roughly calculated something.

His eyes lit up: "The results are out, come and come, the elevation angle is seventy-two degrees, and the palace will personally come to shoot it." ”

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

After the proofreading was completed, Zhu Houzhao was not at ease, and looked at Fang Jifan: "Old Fang, your gunpowder is not wrong, if you pretend too much or too little, it will affect the calculation results of this palace." ”

Fang Jifan shook his head as if he was rattling: "Your Highness has no doubt about employing people." ”

Zhu Houzhao said excitedly: "Okay, come here, light a fire to the palace."

Someone took a torch and lit the fuse of the cannonball first.

Cannonballs also have leads?

Zhang Mao was full of suspicions.

Sparks sputtered from the leads.

At the same time, the fuse inserted into the back wall of the cannon began to be ignited, and Zhu Houzhao and others had already fixed the artillery, and then, a long-lost roar arose.

At the bottom of the barrel, a pound or two taels of gunpowder exploded instantly, producing a huge wave of air, the air wave expanded wildly, pushing the shell, and the shell quickly rotated along the rifling, and so the shell followed the firelight, at the moment of leaving the barrel, the shell followed the rifling, and began to spin, with this inertia, the crazy rotating shell directly towards the target.

The difference between a smoothbore gun and a rifled gun lies in this, after the rifling of the gun, the resistance of the shell in the barrel increases, and the shell can obtain more gas energy. And most importantly, the rifling has the ability to give the cannonball a rotation, and the cannonball rotates itself after flying out, which greatly reduces the drag in the air and enhances the accuracy.

The cannonball whistled in the sky, like a meteor, and smashed towards the target on the opposite side.

Zhang Mao's eyes widened, and soon, he found that his naked eye was no longer enough, so he hurriedly took the telescope, raised it, and saw that the cannonball had already sunk into the forest with the red rope.

Zhang Mao gasped......

Actually...... Hit.

And...... The firing range of the Tiger Squat Cannon has more than doubled, and it is ...... Refer to where to hit.

Zhang Mao is not stupid, he naturally knows what this increase in range means, if this thing is put in the army, it will be a divine weapon, God, God...... He was mentally amazed.

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

Bite...... What's going on?

Zhang Mao was a little stunned, and blew up again?

Can the shell still explode?

On the opposite hill, in a forest tied with a red rope, the fire soared into the sky, and with a loud bang, the air wave blew up countless branches and leaves and the jungle into a mess, and the sparks caused by the explosion ignited the dead leaves nearby, so the smoke billowed out.

Zhang Mao gasped for a moment.

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

Zhu Houzhao also raised the telescope and aimed, cheering from his mouth.

Zhang Mao's excited old face flushed: "This cannon is powerful, very powerful, Ji Fan, we have to go to the mountain to see, the old man wants to see with his own eyes how powerful it is." ”

Ordinary solid cannonballs, in fact, there is nothing to see, it is an iron lump falling from the sky, but this thing of Fang Jifan can actually be bombed twice, so accurate, so long-range, this is a divine weapon.

Zhang Mao is an eye-opener, he is behind the door, how can he not know what a terrible result will be caused by the appearance of this thing.

He was like a child, and without waiting for Fang Jifan's response, he rushed towards the opposite hill and hurried.

Zhu Houzhao and others had no choice but to follow and catch up.

Zhang Mao overcame thorns and thorns, walked like flying, his face was red with excitement, his eyes were about to crack out of his sockets, and countless thoughts came out of his mind. No! I think that at the beginning, if there was this thing, in Jiaozhi, my late father would have withdrawn from Jiaozhi with regret, and it would have become the most regrettable thing in his life? No!