The surface of the cannonball is smooth, that is, the barrel is better fitted, the better the fit will have a better sealing effect, the propellant, is to burn in a small space distance to produce a strong heat wave and thrust, if the space is not closed enough, then the process of pushing the cannonball will lose a lot of kinetic energy, if this problem can be solved, you can greatly improve the range and accuracy of the cannonball.

But here's the problem, the polishing of the cannonball is easy to say, it can be done with some time, but the craftsmanship of this world cannot guarantee the rules of the cannonball, especially after manual polishing, the cannonball cannot maintain a perfect spherical shape, and there will be deviations to some extent, and even if it can be done about the same, it is too time-consuming and laborious to make such a cannonball, and some of the gains outweigh the losses.

With a new idea, Yuan Fang summoned Sang Rou and the others to discuss, listen to their opinions, and see if there was any better way to solve it.

After an afternoon of discussion, there was still no good solution, and when Hongyi brought dinner, Yuan Fang had a new inspiration.

At that time, Hongyi came in with a plate, and when she entered the door, she accidentally tripped over the threshold, and she lost her center of gravity and fell forward, and the plate in her hand came out of her hand, and at the same time, several meatballs on the plate flew towards Yuan Fang at a faster speed.

With such distance and speed, it stands to reason that Yuan Fang has the ability to dodge, but the fact is that Yuan Fang was smashed all over his head by meatballs, and then ran back to the studio laughing. At that time, everyone was scared stupid, and thought that Yuan Fang was smashed by the pill and his brain went crazy, so he hurriedly followed, only to find that Yuan Fang was rummaging around, and looked at the cannon barrel with a quick look and smirked.

Sang Rou ran over to help Yuan Fang wipe his face, Yuan Fang wiped it casually with his sleeve, but the vegetable soup on his body began to get busy, with the help of everyone, soon, a thick wood chip with the same thickness as the inner diameter of the gun barrel was formed, this piece of wood was about five centimeters thick, one end was smooth, and the other end was round and concave, Yuan Fang tried it, and the thickness was just right.

Ye Qingru was puzzled and asked, "Brother-in-law, you don't plan to use this thing instead of iron balls as cannonballs, do you?" ”

Guan Xiaoyun frowned and said, "No, although this thing is light, it shouldn't shoot farther than an iron ball, besides, this thing is not lethal, and, Dean, what is the groove here for?" ”

Yuan Fang didn't explain: "You'll know later, go, take your things to the beach." ”

Guan Xiaoyun cried and said, "Go again, didn't you just experiment in the morning?" ”

Yuan Fang glared and said, "Don't talk nonsense, hurry up and get to work." Guan Xiaoyun was helpless, and it took a lot of effort to lift the barrel onto the cart and send it to the beach.

After setting up the barrel, Guan Xiaoyun was already so tired that he couldn't breathe, sitting on the ground panting vigorously, Yuan Fang smiled and comforted: "It's fine tomorrow, the base can be made tomorrow, plus two wheels, you don't need to lift it in the future, you can push it anywhere." ”

Guan Xiaoyun said depressedly: "Dean, if you don't wait for the experiment to finish the experiment, you can put this thing first, it's too troublesome to move around." ”

Yuan Fang resolutely denied it and said: "How can it be done, everything needs to be kept secret now, and the less people know, the better." ”

Fixed the barrel, installed the fuse at the fire door, and filled the gunpowder, this time, Yuan Fang deliberately added more, and then, under the gaze of everyone, Yuan Fang stuffed the wooden block that had just been made into the barrel, and the groove side was outward, and then, filled a fist-sized solid iron egg.

Everything was ready, the fuse was lit, and with a loud muffled sound, the fiery serpent from the muzzle of the cannon sprang out, and the cannonball shot out like a meteor at a speed that was indiscernible to the naked eye.

Everyone covered their ears and looked at the nearby sea, but no one saw the shells fall for a long time, and the sea had been calm for a long time, without the slightest splash.

Yuan Fang scratched his head and said inexplicably: "What about the cannonballs?" Where did it go? ”

Guan Xiaoyun pointed to the beach and said, "Just now I really wanted to see a black shadow falling on the beach, I'll take a look." Yuan Fang was reminded like this, and he felt that he saw something falling on the beach, and he was suddenly disappointed in his heart.

When Guan Xiaoyun came back with the blackened ironwood, Yuan Fang's message was ignited again, it was a bullet butt, not a cannonball, the question came again, where did the cannonball go? The red cloth analyzed: "Brother, just now there was such a long fire snake spewing out of the barrel, the cannonball will not be burned, right?" ”

Yuan Fang shook his head and said, "It's impossible, it's just a moment, and the temperature is not enough to melt such a big iron ball." ”

That being said, Yuan Fang still checked the barrel with some uncertainty, and there was nothing in it except gunsmoke. With Cong Cong's doubts and incomprehension, Yuan Fang reloaded the ammunition again, lit the fuse, and after a loud noise, Yuan Fang and the others carefully looked at the sea to find the landing point of the shell.

No, still no, could it be that the cannonball was directly hit into other spaces, just when Yuan Fang was thinking nonsense, Hongyi jumped and pointed to the sea and said, "There, there, I saw a splash just now." ”

Yuan Fang looked in the direction pointed by the red clothes, the sea had been calm for a long time, and there was nothing: "Where?" Why didn't I see that? ”

Hongyi pouted and said, "It's long gone, it's an iron ball, not wood, how can it be floating on the surface of the sea waiting for you to see." ”

Yuan Fang scratched his head and asked, "The direction is about the same, Hongyi, how far is the splash you see from the shore?" ”

Hongyi tilted his head and thought about it and said, "I can't say it either, it's quite far away anyway, you wait and look into the distance, don't patronize the eyes." "Reload again, fire the cannon, this time, everyone saw it, probably from the shore, well, I don't know how far away, a black spot fell into the sea, and the splash was swallowed up by the floating waves as soon as it rose and fell.

Yuan Fang's mouth opened wide, and he said in disbelief: "You guys, have you seen it, was that our cannonball just now?" ”

Yuzuki rubbed her eyes and said, "Like, it should be, almost." ”

Guan Xiaoyun nodded very affirmatively and said, "That's it, there is no one else nearby, there is not even a bird in the sky, it can't be something else." ”

Sang Rou proposed: "Brother-in-law, why don't you come and have a look?" Yuan Fang nodded, Sang Rou and the others also ran over to help this time, Xia Yi took a pen to record the amount of medicine Yuan Fang filled, Guan Xiaoyun took the ironwood bullet and wiped it on his body, wiped off the black ash on it, and stuffed it after Yuyue cleaned up the barrel, the red clothes loaded the cannonballs, Ye Qingru lit the fuse, and several people hid behind a reef not far away, staring intently at the sea in the distance. This time, everyone saw clearly, yes, the fist-sized cannonball flew out in an arc, and finally landed on the sea in the distance.

Yuan Fang was overjoyed, screaming happily, succeeded, finally succeeded.

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