Speaking of the electromagnetic cannon again, although Ye Jinyu did not have a mother after the last time, he also carefully thought about the principle of the electromagnetic cannon; I probably remember what it looked like.

Listening to Li Chunfeng's obsession, he said:

"If you think so, let's try to build one. You ask someone to get a cylinder, like a bamboo pole, not too long, one meter ...... It's good to walk more than one metric step. hollow out the knots inside and smooth them again; Wait for me to come back. ”

With that, he went back to the copy shop to get the wire, in fact, it is best to use enameled wire to make electromagnets; But Ye Jinyu didn't know where to buy it for a while, so he used a copper core wire wrapped with an insulating layer in a single strand first. It's still the bundle of four-squared copper core wire that Lu Yuwei sent over last time. The power of the thunder charm should still be quite sufficient, and it is reliable to use a thick line. After taking the line, I saw the battery box stacked next to the cardboard box. I picked up a few more, and without delay, I immediately passed through the door and returned to the National Teacher's Mansion.

As soon as he put down his things, Li Chunfeng didn't know where to take a very old bamboo pole and came back, the bamboo pole didn't know what it was for, it was yellow and old, but it was indeed smooth.

He asked curiously, "You're back so soon?" What is this? Where did you get it? ”

Li Chunfeng pointed to the house on the side and said, "The stove in the stove room!" I've got several. As soon as he said it, Ye Jinyu felt that it was really like the torch used to blow the stove in his hometown.

As long as it can be used, Ye Jinyu doesn't care what he used to do before. After receiving the blowtorch, Ye Jinyu disassembled the double-strand insulated wire, and then circled around the bamboo pipe, stacking it tightly and solidly. It is not the end until the whole coil of thread is wound, I am afraid that there are hundreds of turns, and the end of the thread is knotted and fixed. By this time, the blowtorch had become a heavy weight.

"Let's get another iron ball!" It is best to use a pointed projectile, which is conducive to maintaining a flying attitude. But now that there are no ready-made iron balls, don't think about the standard projectiles.

In the end, with the assistance of the blacksmith who would be the overseer, a piece of pig iron was hammered out into a rough spherical shape.

The national teacher had already returned from the lower court at this time, and when he heard that the gods were testing new magic weapons in his house, he couldn't help but stand out the window and watch curiously. What caught his eye was his own apprentice following the ass of the god man as a trot, and he couldn't help sighing; The heart said that he was an apprentice, but he was still undecided! I only want to engage in these strange and alternative things, and I never refuse to practice the basic kung fu of this discipline.

Looking at Ye Jinyu again, he sighed again, but it's a pity that he has too many masters and can't be included in his own disciples, even if it is a substitute teacher to accept apprentices, otherwise the Chongxuan line can shine in his hands!

Ye Jinyu didn't know that the national teacher was watching them behind the courtyard wall, after putting the iron ball into the side of the barrel of the blowtorch, and then aiming the front end of the barrel in his hand at the empty courtyard wall, after these things were fixed, he connected one end of the coil to the ground, and the other end was connected and put in a small insulated space made of stones, waiting to release the thunder charm inside.

Turning his head to Li Chunfeng, he shouted, "Bring the thunder talisman!" ”

Li Chunfeng hurriedly took it out of his sleeve pocket, first took out a thunder talisman he drew himself, thought about it, put it away again, took out another one from his sleeve, handed it to Ye Jinyu and said:

"King Shenxiao, let's use the Xuanlei talisman drawn by Master! This one is even more powerful. ”

The national teacher vomited blood when he saw it in the back, this loser's apprentice, don't you know how much mana it takes to draw this thunder talisman for the teacher? It's actually for fun! This kind of Xuanlei Talisman is very difficult to serve, that is, at the level of the national teacher, it takes less than half an hour to draw a picture, and it will take several days to recover the mana after painting.

The end is very precious! was consumed by Li Chunfeng, and the national teacher was extremely angry; If it weren't for the help of Ye Shenren now, Lao Dao would have to jump out and beat him with a blue nose and swollen face.

Ye Jinyu didn't care how rare this talisman was, for him, this thing was like paper, just a consumable.

After carefully placing the talisman in the insulated box and placing it on the lead at one end of the electromagnet coil, the firing device is completed.

Make two more wires glued to the rune pins of the thunder rune, and pull the wires a few meters away, which is used to connect the power supply to activate the thunder rune.

Just as he was about to install the switch, Ye Jinyu thought of the loud noise that broke out in the house last time, thought about it, and put the line a few meters longer. The distance from Lei Fu was already more than ten meters, and at such a long distance, the sound should have been attenuated to an acceptable level.

He shouted to Li Chunfeng who was following him: "Come, connect the battery to the switch, and wait for the switch to start." ”

Li Chunfeng is already a wiring expert, and when he heard this, he quickly connected the switch with his hands and feet, and set a fire on the battery. Then he looked up at Ye Jinyu and asked, "King Shenxiao, can you close the switch?" ”

When he asked, Ye Jinyu remembered that he had killed someone when he tried the gunpowder divine thunder last time, and after stopping Li Chunfeng, he shouted loudly: "Everyone leave the courtyard!" ”

When the craftsmen heard the shouting, they stopped their work and looked at the shouters; But none of them moved.

There was no organization and discipline at all, Ye Jinyu was deflated for a while, and shouted again:

"Everybody get out of the yard at once! Hurry up, this god is going to lead the god thunder, and if you don't want to die, get out of here quickly. ”

Now the craftsmen listened to it and saw the identity of the person who really called it;

O man of God! It is rumored in the city that the gods once sent down thunder to split Pingkangfang into powder, and now they heard that the gods said that they would rain down and kill them, and they were frightened one by one, and they quickly retreated to the courtyard in three steps and two steps.

In a few minutes, the courtyard was empty, Ye Jinyu took a deep breath, covered his ears, nodded to Li Chunfeng, and said, "Close!" ”

Li Chunfeng pressed his hand on the switch, feeling a little excited, this press seemed to have an indescribable sacredness and solemnity.

After hearing Ye Shenren say and close it, he pressed it hard.

The current was transmitted to the Xuanlei Fu in a few milliseconds, and the rune paper instantly activated and exploded to form a thunderstorm, surrounded by insulators, and the voltage generated by the thunderstorm was as high as 500 million volts or more, and the current of more than 100,000 amperes was nowhere to be heard, all of which rushed to the small copper core wire.

When a strong current passes through the wire, a strong magnetic field is generated, and a solid iron ball weighing more than a pound is endowed with huge kinetic energy by the strong magnetic field, and it is shot out along the direction indicated by the hollow bamboo tube, and the speed once reached Mach 6 when it is discharged, and the 500-gram iron ball hits the courtyard wall at a speed of Mach 6, and the courtyard wall is knocked out of a big hole like paper paste; Completely unable to stop the progress of the iron ball, the iron ball continued to crush forward with infinite kinetic energy, and destroyed the wall along the way; A big round of holes was punched.

The electromagnetic cannon has been successful all the way to this point.

Unfortunately, the strong current causes the wires to generate a strong magnetic field and a huge amount of heat. At the same time as the iron ball is ejected, the copper wire quickly burns red and softens because it heats up too quickly; The insulation layer of the wire turned yellow and scorched under the high heat, and finally caught fire, and the entire coil group was directly pasted. The coil was destroyed, and the bamboo barrel that served as the cannon barrel was not much better, and the ejection speed of up to Mach 6 brought up more than one million joules of muzzle kinetic energy, which instantly broke and tore the blowtorch into thin strips, which were ignited by high temperature and quickly scorched into ashes.

explained a lot, but in the eyes of Ye Jinyu and Li Chunfeng, they just heard a thunderclap; Ye Jinyu also paid special attention to the thunder, and I don't know if it was because it was in an open outdoor area, or because he was mentally prepared; Ye Jinyu always felt that the thunder was not as loud as the last time he heard it in the copy shop.

After the thunder exploded, I heard the scream of the projectile piercing the air, and after the ultra-short whistle, the courtyard wall collapsed, bringing up a cloud of smoke and dust; The smoke and dust rumbled again several times in a row.

When everything was quiet, Ye Jinyu hurriedly ran to look at the transmitter, the original coil had melted into a black mush, and the original shape could not be seen at all.

"Made, this thing is once!"

And Li Chunfeng stared blankly at the dust raised, where the dust gradually disappeared, revealing a mess; On closer inspection, I saw that the houses and walls of the houses collapsed all the way where the shells passed, destroying things for more than a mile before they stopped.

"This is the weapon that the machine armor man is equipped with!" Li Chunfeng said with certainty.

Behind him, the national teacher also stared at the direction where the iron ball disappeared with his eyes open, and muttered: "I re-emphasize the Xuan Fu Dao, and be a great xing!" When he looked at our Ye Shenren again, he couldn't help but sigh for the third time: "In front of such a strong rune, it is only important to emphasize the Xuangong method, so why teach it!" ”

It was only then that a frightened cry came from outside the wall: "Dead! "The earth dragon has turned over!"