Doomsday: Humanity shrinks 100 times

Chapter 98 Explosion Test
After the device design drawings are drawn up, production will officially begin.

There is actually one difficulty in production: the spring.

The spring is a relatively delicate item for Lu Yuning, and he is more concerned about whether he can make it with iron metal.

They had already processed the iron nails into several parts, some of which were broken into iron slag, and the other part was made into palm-sized cylindrical iron sheets.

This was his first time using metal to reassemble an object with a slightly complex shape. He first tried it on iron slag, but it didn't work.

In the end, Xu Ting's help was still needed. The two worked together very well. After Lu Yuning put the materials in place, Xu Ting used her special powers to soften the iron slag.

Her ability also has a special feature, which is that the softening can be concentrated at a certain point on an object, which is somewhat similar to Lu Yuning's ability.

With the help of Xu Ting, the iron slag slowly reorganized at the molecular level, and the interaction force between molecules reappeared. Finally, it slowly formed a simple small spring according to Lu Yuning's thoughts.

Just to make such a small thing, Lu Yuning has overdrawn all his supernatural powers, and this is already his limit.

He looked at what he had made, reached out and pressed it, but there was almost no response.

The material is too hard, and the reconstructed spring wire is a bit thick, so it is completely unable to generate elastic potential energy.

Lu Yuning began to have a headache. It seemed that this plan was not going to work. He had neglected his ability to handle metal objects.

"Huh? Why use metal?" Lu Yuning was suddenly stunned.

He was actually a little stupid. Springs don't necessarily need to be made of metal, and the springs they need don't require high-intensity extrusion.

As long as there is some rebound ability, it can trigger the potential energy conversion of the iron block.

A plastic spring is perfectly adequate for this task.

"No?" Xu Ting asked as she looked at Lu Yuning's rapidly changing expression.

"No, that's wrong. We need to use plastic to make the spring."

"Oh, that's it." Xu Ting nodded.

Lu Yuning figured it out and immediately put his idea into practice. Then he thought about it and asked Xu Ting to help soften his attitude.

Sure enough, with her soft-changing ability, Lu Yuning felt for the first time that her control over plastic had reached an unprecedented level of smoothness.

The spring I had in mind was completed almost instantly, and it looked extremely well-made.

Lu Yunnan couldn't help but think to himself, I wonder when I can reach this level by myself.

He pulled his thoughts back and looked at the spring in front of him with great satisfaction.

The most difficult part is done, and all that remains is to build the overall framework.

But before that, we need to do an experiment.

The main purpose is to determine how large the volume of the iron block should be to produce the maximum potential energy conversion after Zou Yunxin's supernatural power is converted into potential energy.

The potential energy of an iron block is not the same as that of aluminum. The heat of aluminum increases as its volume decreases. Of course, there is an upper limit, but it is generally inversely proportional to the volume.

However, potential energy is related to its own deformation. The smaller the volume, the better. There is a storage limit issue.

Just like a very thin spring, if you use a huge force to flatten it, the force it can actually generate is limited.

Similarly, if the spring is very thick, using the same force to compress it is likely to produce only a very small deformation, the conversion rate is very low, and only a small amount of potential energy can be stored, and the rest is consumed in the form of work.

Therefore, in terms of potential energy conversion, there is actually an optimal volume solution, but this can ultimately only be determined through experiments.

This experiment can only be handed over to Zou Yunxin.

The method is very simple. Take the largest and smallest two iron blocks, convert the potential energy, and see how high you can bounce the same object. Then eliminate the one with weaker potential energy, reduce the volume as needed, and continue to compare and try.

It is somewhat similar to the bisection method in mathematics to find a specific solution.

It's just that the middle value here is not easy to find, but there is no need to find the optimal solution, just to measure the volume within the approximate range. The experiment ended quickly, and the iron block finally selected was about 2 mm in diameter and just about 2 mm in height.

This volume can generate their current maximum potential energy.

Next, we need to look at the caliber of the projectile, which depends on the diameter of the projectile, that is, the size of the bomb.

Finally, we came to the step of making bombs.

According to Lu Yuning's previous idea, it was similar to the method of the rust bomb, except that it was wrapped with a layer of aluminum slag on the outside.

However, ordinary plastic cannot be used as the external material.

There are two options for materials, one is wood and the other is high-density polyethylene.

The main thing to consider is the heat of the bomb itself. According to Zou Yunxin's special abilities, the aluminum powder should be very hot, far exceeding the melting point of plastic.

It is possible that the outer packaging of the bomb melted before it was launched, and naturally it lost its ability to explode.

The melting point of high-density polyethylene is actually not too high, it should be around 110 degrees Celsius.

The melting point of wood is relatively high.

But the problem with wood is that it is too heavy. Wood of the same thickness is much heavier than plastic. In addition, wood is much less tough. Under the same thickness, the power of the explosion may not be as great as that of a bomb with a plastic shell.

This is also why Lu Yuning did not choose wood to make potential energy bombs before.

However, the improved bomb is launched through a projectile, and its power mainly relies on its high-temperature burning ability, so wood is much better than plastic.

The final plan was finalized. This thing is very simple to make. The bomb is still made in the original way, but a sandwich layer is made of wood material and aluminum slag is put in it.

Lu Yuning quickly made the bomb according to his idea.

The first test explosion experiment officially began.

"How do I try this?" Zou Yunxin trembled a little as he held the new type of bomb.

The bomb looked to be about the size of two arms around each other. Based on their current size, it was estimated to be 0.2 centimeters in diameter.

Lu Yuning looked at Wu Xiao who was hiding far away, thought for a moment, and finally looked up.

He shouted from a distance: "Everyone, go into the tree hole."

When everyone heard him speak, they hurried over.

"Let's go into the tree hole first, then take some precautions and let Old Wu throw it." Lu Yuning came up with an idea.

The power of this bomb is unknown, so we must be careful.

In the end, Lu Yuning came up with a more reliable method.

It is definitely not possible to stand on flat ground. If the hot aluminum powder splashes out, you will basically be killed or injured.

Be sure to take all-round protection.

So people have to hide in the shelter, the explosion site should be under the tree, and Wu Xiaolai has to be teleported into the air to let the bomb fall freely, otherwise the landing time is too short and it will explode almost instantly when it hits the ground.

In addition, the hole must be sealed quickly.

In addition, in order to test the power, Lu Yuning decided to put a large plastic board upright on the ground.

The bomb will then fall freely in front of the test board.

everything's ready.

(End of this chapter)