Chapter 2131: 2131 - - 57-19 Structural dynamics

"Sure, of course. If there is any material you want, you can talk to Butler B or C about it."

When Greerina and Freddie approached Freddie with the idea of doing research on blow floaters at Nido Castle, Hitoshi agreed to do so in a good mood.

"That's great, Freddy."

"Yes. Let's start by building a basic plane, shall we?

"Yes, that's right.

Using light silver as a skeleton, Freddy and Grina began to build their original Blow Floater.

"<>!　<

"Ugh, why is it so hard to determine the dimensions in one shot ......?"

Freddy muses.

The smallest of objects can be so small that the smallest of errors can lead to big discrepancies, and extremely large objects are hard to determine their dimensions, both of which make the magecraftsman weep.

"Jin-sama does it with ease. ......"

"I don't think we should compare him to ...... that man."

"I know, right?

Let's take it at our own pace.

"I don't disagree."

Freddy and Grina agreed.

"So ......, we're going to have three people in the car, right?"

"Yes. Basically, there will be two people in the car, but I think there should be room for more.

"I agree. Then, it should be about the size of Jin-sama's , right?

Then, Butler B gave me some advice.

"I have a table of approximate weights and their wing areas."

"What about ......?"

"I guess we could look at that. It's not like it changes from person to person."

Freddy said, "It's like a function table, so if it's a universal value, you don't have to go through the trouble of looking it up yourself, you can just refer to it.

"Hmmm ...... I wonder if that's true. ...... I guess so."

Grina agrees, and they decide on the diameter of the disk wing that will serve as the main wing.

"It's a combination with the blow engine, isn't it? How about we start out with a larger diameter to give us more leeway?

"Yes, I think that's a good idea.

The two of them proceed with the work like this.

They sometimes argued about what to do and what not to do, and completed one after 5 days of work.

* * * * * * * * * * *

"......"

Before the test flight, Freddy and Grina asked Hitoshi to check the whole machine.

Jin was pleased with the way the two asked him to check their work, and was not overawed by his own skills.

So he carefully checked the work.

"Yes, the joints are strong enough, and there is no bias in the materials. The framework is fine.

Jin checks step by step and tells the result.

"Did you use thinner light silver for the wing surfaces as well? The current strength is sufficient, but we should think a little more about it in the future.

"What do you mean?"

At Jin's words, Greiner asked back.

"It's OK for now because the wing framework is shaped like this, but if we use elliptical or diamond-shaped wings, there is a possibility that some parts of the wing will not be strong enough.

Because the wind is blowing from below, there is a constant < force," Jin explains.

"It would be better to add more weight, but also a few more ribs. In that case, you have to do a good job of removing the meat to keep the weight gain down."

"......That's what you're saying, I understand."

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"The output of the blow engine seems to be ...... generous. It should be enough.

"I am relieved."

Greiner is relieved at the results of Jin's last check.

Freddy, on the other hand, is thinking about how he can improve on the points Jin pointed out.

"Jin-sama, what you said earlier, is it OK to use > for the wings?"

The most important requirement for the outer panels of wings is tensile strength.

> from Horai Island has higher tensile strength than unreinforced light silver.

"Ah, that's a good point of view. In that case, we'd have to increase the number of ribs a lot more, though."

"Yes."

Freddy was glad that Jin approved of his idea.

"Jin, Jin-sama, do you have any tips on how to remove the meat?"

Gulina asks in a bit of a panic. I wonder if she thinks Freddy is ahead of her.

"Yes, I do. You have to think about the structure and do it without compromising the strength ....... You should look into structural mechanics."

"I understand!"

It may seem a bit exaggerated to talk about structural mechanics, but Nido Castle also has such materials.

For example, the strength against bending, taking a square timber of constant length as an example: .......

The strength of 1×2, 2×1, and 2×2 square timbers to bending in the longitudinal direction (material) is calculated based on a cross section of 1×1 in length and width. What is the strength of 1×2, 2×1, and 2×2 square timbers to bending in the longitudinal direction (material and length are the same)?

The answer to this question is structural mechanics.

If the strength of 1x1 is 1, the strength of 1x2 is 2 and that of 2x1 is 4. This means that the strength of 2 x 2 is 8.

In other words, the strength of a long section is higher in the direction of bending.

From this, we can conclude that the strength against bending is more influential on the top and the bottom side of bending, and thus we can derive the answer ...... as to where is the best place to cut out the wall.

Also, a quadrilateral is distorted by lateral forces, but a triangle is not. This is called a truss structure.

Using the truss structure, a strong structure can be built with thin members.

This is the case with dome roofs and cross braces between columns.

In addition, a in which the joints are firmly fixed so that they do not move.

The cross-sectional structures include the H-beams often seen in steel frames, and the L-angles and C-channels used in aluminum. Honeycomb structure.

Hollow pipes are also a product of structural mechanics.

A quick digression.

Without giving a direct answer, Jin suggested that we accumulate such necessary knowledge.

"I see. I thought it was more about practice than knowledge!　I thought.

Hearing this, Jin laughed.

"Ha, if you are more of a craftsman, you might feel that way. On the other hand, if you are more of a researcher, you might put more priority on knowledge. It's not a matter of which is better or worse, it's a balance.

He feels that Greiner is more of a craftsman and Freddie is more of a researcher. They would be complementary partners.

"Anyway, can I try to fly?

Gulina asks.

"Yeah, sure, but be careful, okay? But be careful, okay?

"Yes. I'm thinking of having <> be the test pilot.

Char is a girl automata with red hair and brown eyes that Gulina had created.

"That's nice."

Jin himself often lets Reiko and Jin D do the test runs. Neither Greiner nor Freddie had any experience in operating a blow floater.

Although Greiner has flown an elliptical-wing airplane <> with a piloted plane.

Safety first and foremost.

Grina and Freddy were to test fly the first prototype <> in front of Jin, Reiko, Butler B and C.

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