A little difficulty occurred in the process of creating a tank. It is said that there are no shells in this world, and the armor of the tank does not use any special steel, as long as it can defend against bows and arrows, just get some iron sheets, but the difficulty is to reproduce the engine of the tank.

Wang Qiufeng advocated the manufacture of a diesel engine, first extracting oil, and then refining diesel through distillation, catalytic cracking and other steps, and then using diesel as a raw material to drive the engine.

But Carpenter Liu disagreed with this point of view and felt that it was too troublesome. In his mind, he had conceived a machine that could move permanently without the need for energy - a power machine made from magnetic ore found in the process of iron ore mining, so that he could make a power plant for a tank without the need for labor.

Wang Xijia took a deep breath and knew that Carpenter Liu had fallen into the trap that many engineering enthusiasts were most likely to fall into: manufacturing a perpetual motion machine. In the exploration of science and technology by human beings, countless people have tried to create a "perpetual motion machine", but there is no doubt that they have failed.

Of course, the path chosen by Carpenter Liu is still relatively smart, and it is slightly more reliable to use magnetic force as a perpetual motion machine than to use gravity and the like. But the magnetic power is not endless, you need to constantly replenish the magnetic force, and natural magnetic ore simply cannot reach such a strong force.

Wang Xijia tried his best to popularize the three laws of thermodynamics for Carpenter Liu, especially the law of conservation of energy, but Carpenter Liu said that he did not believe it.

"In your world, there may be conservation of energy, some laws of thermodynamics, but not necessarily in our world. Don't act like you know everything, you know everything. I'm going to make this magnetic perpetual motion machine for you to see. ”

Wang Xijia understands that science can no longer convince Carpenter Liu to follow him to build a diesel engine, and once this stubborn primitive person decides a certain truth, it will not be able to make him change.

So Wang Xijia decided to use the primitive method to convince Carpenter Liu - to conquer by force. Wang Xijia suggested that Carpenter Liu go head-to-head with himself, if Carpenter Liu won, then Wang Xika will follow to make a magnetic perpetual motion machine, and in turn, Carpenter Liu will obediently follow Wang Xika to engage in diesel engines.

Speaking of which, even if Carpenter Liu was reluctant, he had to fight Wang Xijia alone. Because this represents the dignity of men, it is the most important thing for primitive people.

The heads-up process didn't take much effort, Wang Xijia directly put his arm around Carpenter Liu's neck and put him to the ground. With tears in his eyes, Carpenter Liu agreed to carry out Wang Xijia's diesel engine experiment.

Just as Wang Xika was figuring out whether to build the AGT gas turbine of the American M1 tank or a T34 V2 engine, the hairy Zack suddenly stood up and said to Wang Xika: "Dude, I want to follow Master Liu to build a magnetic perpetual motion machine, and I want to fight with you." ”

Wang Xijia couldn't believe his ears, stared into Zack's eyes and asked, "What did you say?"

Zach said calmly: "You heard me, I'm going to fight you alone." ”

Wang Xika is really angry and funny, he spent so much effort, and he didn't want to help Zack build a tank to get revenge, but he turned out to be good, and he had to help Carpenter Liu do something perpetual motion machine. Although Zack is not as powerful as Qiuqiu, he is also a hairy man with a height of two meters and eight, although he has not weighed it, but he looks like he is more than 300 kilograms, and his strength is much greater than that of ordinary humans.

But there is no way, Wang Xijia is still quite prestigious in this village, since others have asked him to fight alone, he has to face it. After all, not daring to fight is more humiliating than losing a fight.

Wang Xijia kept recalling in his mind the stories of defeating the strong with the weak and the big with the small - such as Wu Song beating the tiger, David singled out Golia, He Jinyin defeated the senior brother of Broken Water and other heroic deeds to give himself courage, thinking about it, he felt much better, and the weak side did not have the opportunity to defeat a strong opponent.

He remembered that he had teamed up with Peng Lianhu Lang Naduo to subdue the crazy Zack on the mountain, and he couldn't help but have a battle plan in his heart: "Zack is tall and powerful, but he still has the shortcomings of hairy people, and his endurance is not good." If you only need to survive 5 rounds for 3 minutes per round, then Zach will naturally have no physical strength, and when the time comes, you can find an opportunity to renaked choke, and you can also subdue him. ”

Although there is a lot of knowledge to give Wang Xika courage, when he actually faces Zack, he still feels his legs and stomach tremble - when you actually face a two-meter-eight giant animal, you can't help but tremble in your legs.

Neither of the two made the first move, Wang Xika was afraid that he would be caught by Zack at close range, and Zack was afraid that he would beat Wang Xika to death with a punch. The two of them stood like this, which was a bit unexpected by Wang Xijia, originally his tactic was to consume Zack's physical strength, but Zack was in a posture of not moving the enemy, how could he consume his physical strength?

Wang Xijia put on a posture of Huang Feihong, stretched out his hand and hooked Zack, asking him to strike first. Zach really moved! The hairy man kicked his right leg and rushed towards Wang Xijia. Wang Xika secretly shouted: "It's a good time!" and wanted to jump away, but Zack's weight was too large, and the earth trembled when he ran, like an earthquake. Wang Xika was just about to jump away, but his feet were suddenly shaken by the earth, and he was hugged by Zack.

A strong force majeure knocked Wang Xika to the ground - Zack was afraid of hurting Wang Xika, so he didn't punch hard, but just put him down like Wang Xika put down Carpenter Liu.

The humiliation of being defeated by savagery filled Wang Xika's heart, but he was willing to gamble and lose, Wang Xika still jumped up and said: "The skills are not as good as people, and they are losing." In that case, then you go and build a perpetual motion machine, and take your leave. After saying that, he went home alone and drank and punched sandbags.

Zach and Carpenter Liu happily began collecting magnets in the mine and began to build their perpetual motion machine. Wang Xijia tossed and turned in bed and couldn't sleep, only hated that he didn't calculate that Zack's weight could cause a small earthquake at that time, if he had considered this, then he would not have lost heads-up.

In fact, engaging in science and technology in a primitive society is not his greatest hobby. Before the crossing, he was a man in an iron cloth shirt, and he claimed to be the strongest primate on the planet, even if it was a silverback gorilla, a bear, or a Siberian tiger. Now that I have met this hairy man, it is nothing more than the level of a silverback gorilla, and I was defeated so easily, which is unforgivable!

Wang Xijia was thinking about how to defeat the Mao people in heads-up, and after thinking about it, he still felt that his original thinking was right: his weight was smaller than that of the Mao people, which meant that his strength was also smaller. But he has better endurance than the Mao Man and is more flexible than the Mao Man, so the best tactic is not to fight head-on, you should practice moving and find opportunities to win by rear-naked choke around your back. As for the small earthquake caused by Mao Ren running, the magnitude is actually not large, as long as you are mentally prepared, you can avoid it.

Just as Wang Xika was practicing his position all over the room, there was a sudden knock on the door. Wang Xika opened the door and saw Zach and Carpenter Liu kneeling on one knee. Zach was still dressed in snow-white hair, but Carpenter Liu's outfit was different, he was shirtless, his upper body was naked, and he was carrying a handful of rattan on his back - these two people actually took the blame!

It turned out that Carpenter Liu and Zack found that the magnetic engine had indeed encountered insurmountable technical difficulties, and the perpetual motion machine really could not be built.

Wang Xika looked up to the sky and sighed, threw away the rattan on Carpenter Liu's back, invited the two of them to the living room to sit down, and said, "Two virtuous brothers, why do you bother? Just say it, I will definitely come back to build the engine with you." ”