The base frame is selected, and the next step is to select the bone material.

　　 "Should I choose ‘Calcium’?"

　　The calcium material is relatively light, and the straight-shell Nautilus used as the design template is also made of calcium as the main component.

　　 If you choose calcium directly, there will be a lot less things to deal with at once.

The skeletal system is not something that can be achieved overnight. It needs to consider the density of the new material, chemical activity, difficulty in obtaining, etc. If calcium is selected as the bone material, these data can actually be directly applied to the design, saving A lot of trouble to recollect the parameters.

　　 Pensively for a while, Huo Gu dismissed the idea.

"No, calcium does not meet my expectations. The hardness of calcium as a bone is too low. If you want to ensure protection, you need to thicken the carapace. But in this way, not to mention the space occupied, the material is lighter. There's no point."

　　 Calcium has a Mohs hardness of 1.75, and the skin has a Mohs hardness of 1.5. This comparison shows how soft calcium is actually.

　　 Why did the earth creatures choose calcium as their bones?

　　 There are many reasons, but Huogu’s main explanation is that the difficulty of obtaining materials is that the earth’s organisms finally chose calcium as the bone material.

　　 In the early earth environment, calcium carbonate existed in large quantities, such as calcite and limestone. In addition, in terms of preparation, calcium carbonate is very easy to separate calcium.

However, what Huogu wants is performance, and what he wants is a strong and light enough material. It can rely on cells to achieve molecular-level material processing. I dare not say anything else, but in terms of preparing elements, it can already be rejected. Those chemical plants on the earth are several blocks away, and they don’t need to worry about the problem of obtaining materials.

　　 This can be seen from the elemental quality of various types of elements stored in Huogu.

　　 "If iron is possible, would it be too heavy?"

Such a picture emerged in Huogu's thinking-a newly designed cell cluster that looks like a straight-shelled nautilus wanders in the sea, and then gets closer and closer to the seabed, and finally can only move in the sea against the seabed. .

　　 "No, no, no! What am I thinking, this can't work!"

　　 "A very light material is needed, and it must be light enough..."

　　 "In other words, the density must be small. If the density is high, the mass per unit space will naturally be large."

　　 This time it is indeed beyond the scope of Huogu's knowledge. Its old profession is archaeological excavation, and its proficient knowledge areas are geology and biology, and it only stays at the high school level for mathematics, physics and chemistry.

　　 This is still relatively ideal. Before Huo Gu became like this, he was already an old man in his sixties. It has been several decades since the high school period, so I can't remember how much.

　　 Suddenly, Huo Gu remembered what happened when he was at the International Space Center. An old friend who worked there once bragged about a metal—titanium.

　　 "Titanium, the old Tang guy blew this metal into the sky in front of me. He also said that the first-generation space battleship of the earth must also use this metal..."

"Cut, I'm not afraid that the wind will flash my tongue when I say this. There is no space elevator yet, and the International Space Station is just a little bit big, and it's a space battleship. I didn't even touch one side. I knew it was like me. Bragging in front of laymen, tossing a Mars excavation requires manned spaceflight..."

　　Thinking of this, Huo Gu was full of grievances. At the beginning, it was because of his old age that an old bone could not withstand the reaction force of the rocket boost, so he was reduced to the International Astronautical Center and participated in remote command work.

　　Since you have all envisioned space battleships, hurry up and build the space elevator! I really want to participate in the discovery of Mars personally! ——If there was a space elevator at that time, Hogu’s aged body would no longer be a resistance to it going to Mars.

　　 After some venting, Huo Gu also returned to his original calmness and looked at the metal ‘titanium’.

　　 "As a space metal, resistance to high temperature and pressure should be beyond doubt..."

　　 "There is also quality. Because it is still transported by rockets, the materials should be developed as light as possible, which fits my current needs."

　　 "Well, let's decide it is'titanium'."

　　 But Huo Gu didn't know much about this kind of metal. After all, he was a layman who could only do archaeological excavations. He had little knowledge in the field of industrial or aerospace materials.

　　 But it doesn’t matter. If you don’t understand, you can learn, there are real objects, or you can experiment as you want. It just takes some time to explore.

　　The bone material was selected, and Huogu began to obtain information about ‘titanium’.

　　 First of all, whether this metal can exist stably on the planet Huogu is now on.

　　This is very important. Even if the properties of titanium are good in all aspects~lightnovelpub.net~, it is a waste of being placed in an environment where it is very easy to react, and there is no way to provide a protective shell.

　　 Hogu’s method is very simple and rude, expelling a small part of the stored titanium from the cavity into the ocean, and then observing it with the naked eye on the rhizome system.

　　The titanium metal in the ocean is entangled by a root. While preventing it from being washed away by the ocean current, it also undertakes the task of sensing temperature changes. Any chemical reaction will be accompanied by physical changes such as heat absorption or exotherm.

　　 After confirming that there was no change, Huogu took back this part of the titanium metal and created a cavity specially used for experiments on a section of the main root of the seabed.

The recovered titanium metal was put into the cavity, and Huogu transported the elements one by one from hydrogen, helium, lithium, boron, etc. into the experimental cavity along the periodic table. After confirming that there was no reaction, he withdrew the elements. Inject new elements, and so on.

After the aqueous solution environment is over, I will try to use the air environment to repeat the experiment again to see the changes in the air environment... and then the pure gas experiments of various gases to see the changes in the titanium metal in this environment... and then It is the change in strong acid or alkali water...

　　To use titanium metal, it is necessary to have a comprehensive understanding of titanium metal. These tests are indispensable or sloppy, and must be carried out conscientiously in order to obtain accurate data.

　　 Of course, other aspects of the matter have naturally not fallen. Step-by-step experiments are tedious and time-consuming, so Huogu chose to solve other problems in the new design in parallel.

　　 The next thing to be done is to design and make reasonable use of every inch of space inside the cone shell.

　　 Huogu did not forget the original design criteria-to design individuals that can survive the super wave!