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One of them was the <
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"It's almost lunch time, so they will be in the lab at this time."
Fiona Fierce said.
The time was 11:30 am.
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The cafeteria is very popular and if you don't get in line early, the menu you want will be sold out.
"That is the factory and the laboratory is this way.
The factory is a large one-story building. The aircraft laboratory was built next to it.
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Fiona knocked on the door and it was immediately opened from the inside. It seems that a call had been made.
"We have been expecting you, Sir Jin Nido!
Hello.
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There were about 10 students in the lab, and a mature man who looked like a lecturer.
"I'm Lohr Eisker, head of the Aeronautics Laboratory.
I'm Zora Himmel, deputy director of the Aeronautics Laboratory.
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Ciel Azure.
Ena Kouki.
Tiner Vito.
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"......"
After each person introduced himself or herself, the group went straight into a round-table discussion.
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Jin followed the invitation to a conference table in one corner of the laboratory, where he found a drawing on the table.
"This is ......."
"This is the small aircraft we are working on."
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The manager of the office, Lois Eisker, said.
"It's an ...... interesting design."
Jin had to agree.
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After all, what was depicted there was a biplane with circular wings.
"I see, you did this to reduce the overall length and width, didn't you?
"You are indeed a master, Mr. Jin. You were able to recognize the intent at a glance.
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Lower Eisker is impressed.
"This will improve the left-right mobility, won't it?
"Oh, yes, that's right!"
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During World War I, most fighter planes were biplanes.
Jin thought he had read in a book that biplanes were more maneuverable than monoplanes because of their reduced overall width .......
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This is a one-sided view, and in reality, the purpose is largely to secure the wing area to obtain the necessary lift in combination with the engine output.
During World War II, when engine power increased and speed improved, most aircraft were metal monoplanes, and their speed more than doubled.
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You can see that such a large, long, shape is difficult to rotate.
Therefore, the Aerospace Research Laboratory came up with the idea of using two layers of circular wings to reduce the diameter of the wings.
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"A normal circular wing has a diameter of about 5 to 10 meters," said Zora Himmel, deputy director of the Aerospace Research Laboratory.
Zora Himmel, deputy chief of staff, spoke up.
"So the load, or the number of passengers, is affected. So, this
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A four-seater would be in the class of 6 to 7 meters for a single circular wing.
If it is 6 meters, the area is 3 x 3 x pi. If pi is 3.14, the area is 28.26 square meters.
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What would happen if two wings share this area?
Divide half 14.13 by pi and find the square root of the result.
The answer is approximately 2.12. The unit is the meter, which is the radius, so the diameter is doubled to 4.24 meters.
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Considering the loss of efficiency, the design drawings for this project show a diameter of 4.5 meters.
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This makes it appear quite compact, although its overall height is about 30% higher.
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"Are you thinking of a low speed?"
Jin asks as if to confirm.
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The air resistance increases, so it is not suitable for high speed flight.
"That's right. It is mainly intended for travel in and around the city. Specifically, within
"Then that should not be a problem."
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It is easier to design a vehicle if the purpose of use and the target performance are clear.
We were just discussing the possibility of making a prototype and model at a quarter scale.
"I see, that's a good idea.
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Jin agreed.
The smaller model would have different characteristics from the real one due to the effects of hydrodynamic constants such as aerodynamic drag, but it was thought that the effects would be relatively small for a one-fourth scale model.
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"Oh, that's very encouraging to hear you say that!"
Zora Himmel said happily.
"We already have all the materials we need."
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"That's exciting!"
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"We're finally going to start processing!"
Ciel Azure says happily, "We're going to start processing the parts today," and Jin lets him observe.
"If Jin-dono is with us, we'll be a thousand strong.
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Jin is told to ......, but he is not going to touch it for the time being.
（First, let's see how it goes.)
If there is any danger, he and Reiko are willing to lend a hand.
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"We'll start by processing the parts first."
We process the prepared ingots of light silver according to the drawings.
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The first step is basic processing.
Bars with the specified cross section and plates with the specified thickness are being produced one after another.
(Yes, they are quite skilled.)
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Jin smiles with satisfaction as he sees that not only theory but also practice is being applied.
* * * * * *
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The day ended with the processing of the parts.
Jin and Elsa are escorted by Fionn Fiasse to the dining room for visitors.
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Tomax Bartmann was not present, and a quiet private room was prepared so that Jin and Elsa could eat alone at their leisure.
Reiko sits in the back and Elsa in the front.
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It was a relaxing dinner with the whole family.
The menu was in the style of the Shoro Empire, and both the quality and quantity were satisfactory.
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Jin and Elsa relaxing over a cup of tea after dinner.
"......Jin, did you have a good time?"
"Yes, we did. "Yes, I did. I got to see the people who will make the future.
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Erza giggles when she hears that line.
"You look like an old person."
"...... I guess so."
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Jin scratched his head. Then he said something else.
"I still have a lot of work to do, don't I?
Hearing this, Elsa said,
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"Well, the road is still halfway there. Let's ...... do our best, shall we?"
"Yes, I guess so."
Jin answered with a smile.
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