3114 - - 82-13 March 18

<.

Momoko and descend the ladder leading to it.

"It's long, isn't it?"

Momoko says,

"It's about 50 meters long.

replies, "It's about 50 meters long.

Momoko, who is not a human but an automaton, was greeted by < in polite language.

Momoko the automata and < the golem completed the 50-meter descent without tiring.

Visibility is not a problem for the two, as a dimly-lit <> is embedded in the wall.

"Here is the last door.

points to a metal door about two meters long and one meter wide.

On the surface of the door was some kind of writing, and it was chipped in some places.

"Take a small piece from here and fit it into this missing part.

The missing part is concave in a square shape, and the lock is released by fitting a small piece with engraved letters into it.

"So that's <<3S><<8X><<1H4>>?"

"Yes."

"And the order in which you fit them in is the order in which you found them?"

"Yes."

Momoko found a small piece (piece) with the letters <<3><<<8><<<1><<< 4>> and inserted them into the pieces one by one.

While fitting them in, he raised a question.

"What happens if I fit a different piece?"

"Not only will it not open, but it will activate a transfer magic circle hidden in the floor and send us far south ...... to the area where we were stored."

"That's ...... tough, even if there's not much danger."

As he said this, the last piece was inserted.

"The lock is now unlocked."

says and pushes the door open. The door slowly opened with a slight creak.

"Come in, please."

"Thank you."

<, steps through the door.

* * * * * * * * * * * * * *

At the same time, Jin and the others were having a party at .

It was not a banquet, however.

They were divided into several groups and had a big discussion about technology.

One was Hitoshi, Eira, Groma, Cachier, and Tiner Vito of <>.

The other was Goh, Arnold, Rasnat Heilbronn, head of the <>, and Loa Eisker, head of the <>.

The other is Rubina, <> Deputy Director Zora Himmel, also <> Ciel Azure, and Ena Kouki.

And by the way, all the people talking with Rubina are female researchers. Goh's group is all men, not to mention Jin's group.

Jin and his group are discussing the technology to convert to .

Of course, they do not work out the details, but rather discuss ideas, a preliminary stage of the study group.

In other words, it is a chat among engineers.

"I think it's okay if the speed is a little slower," says Jin.

Jin said.

"If we do that, even if the engines stop, can we land by gliding?

< says with interest.

"I think so.

"If we can do that, then we won't need an emergency parachute, will we?"

"Maybe we could just keep the air cushion to prevent a crash."

That's a good idea.

Safety is very important.

The problem is the material, but now that light silver is cheaper. I'm sure that won't be a problem.

"As Katya said, we can use light silver as our main material.

"It's just that vanadium is very expensive to alloy. Cachéa is always telling me about it.

"That's because it's really expensive."

Jin often uses 64 light silver. It is an alloy of light silver containing 6 percent aluminum and 4 percent vanadium.

Compared to pure light silver, its tensile strength is 1.7 times greater and its proof stress is 3.8 times greater.

(The proof stress here is the force that is large enough to deform the material to the extent that it does not return even if the force applied to it is removed.)

"I hope they find a vanadium mine somewhere."

"Hmmm, yes."

...... and so on.

Goh and Arnold said.

"Goh, you have a very reasonable way of thinking.

"Is that so?"

"Yes. Yes. You're quite a young man.

Arnold compliments Goh. But on the other hand, Rusnert Heilbronn, the director of the Goh lab, says to Goh, "Mr. Goh, I'm very proud of you,

"Mr. Goh, that could probably be made a little faster, couldn't it?　Why didn't you?"

He asked the question.

"That's because we had to increase the wing area in order to provide glide performance for a safe landing in the event of an engine failure, after all.

"I knew it. ...... So you don't care about the maximum speed, is that right?"

"Yes."

"Well, you don't have the desire to be an engineer, do you?"

"Is that right?"

"I think setting a world record for the fastest speed is one of the main goals.

"......"

Knowing the aircraft that Jin had developed, such ambitions would be nipped in the bud at the same time, but Rasnath Heilbronn had no idea of such a thing.

"If there's one thing you lack, Goh, it's ambition," says Rasnat Heilbronn.

Rasnat Heilbronn did not know that.

...... and all female technicians, Rubina and the others.

"Rubina, you learned from Marikka, didn't you?

"Yes.

We learned a little bit of magical engineering from Marikka.

Oh, is that right ......?

"Marikka and Master Theon would visit us in Avalon from time to time and give us lectures and classes."

"That's right. ......, isn't it?"

The three groups seemed to be having a good time talking to each other.