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　At the banquet in Nido Castle, Jin was consulted by Rubina.

　The subject of the discussion was whether or not blow floaters are incompatible with airplanes.

　It may not seem like the kind of thing to talk about at a banquet, but it can't be helped since Rubina is too old to drink alcoholic beverages.

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　And Jin himself likes this kind of talk.



"I think it's more of a developmental type than an incompatibility," he says.

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A developmental type?

"A developmental type? The ......<> is based on Marikka's <> and has been developed in the direction of maneuverability and speed."

"<>?"

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　Rubina tilted her head at the new term.

"Oh, yeah. I was thinking of calling them blow floaters, which use aerodynamic forces to control their attitude and change direction."

"<> ....... I think it's kinda cool."

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"Really?"

　Jin added,

"You could say that a larger version of the blow up rotor, with more carrying capacity, is a hurricane.

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　< is shaped like an airship, but it is based on the principle of a .

"Oh, I see. ....... The scale is so different that sometimes I almost forget."

　Rubina giggled.

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　Then Rhodes joins in.

"Are you talking about <>?　We were all very impressed with Jin-san's ."

"I see. ...... I'd like to try more different shapes for the wings."

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　The area of wind emitted by a blower flotation engine (blow engine) is not limited to a circular shape. It can also be elliptical or square.

　The advantage is that it does not increase the weight, since it can be changed by the description of the magic formula (MagiFormula).

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"Then we can make a shape more like a <, and I think we can make it more maneuverable by using aerodynamics."

"Oh, that sounds fun!"

I'd love to build one!"

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　Rhodes and Rubina both said with enthusiasm.

"I see. Well then, ...... since we're having a party today, maybe we can talk somewhere after tomorrow."

"Yes!"

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"Yes, that sounds good."

　That's how it came to be.

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　And the party is going on in harmony.

　Since we are like a family, the atmosphere does not deteriorate even if we are opponents.

　The members of the Nordic Federation were enjoying themselves, praising each other's skills and pointing out where they fell short.

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　Ellis and Freddie had never seen or attended such a lively banquet at Nido Castle.

But the atmosphere is very nice," said Ellis.

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　Jin was relieved to hear that they enjoyed the party.



　As an aside, some people in Kaina Village came to see what was going on because they heard happy voices coming from Nido Castle, and Butlers B and C took the liberty of serving sake to those people.

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　It is a further aside that villagers came to the village one by one after that.



* * * * * * * *

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　The next morning, Rhodes and his crew returned to the Nordic Federation in their .

　Jin takes his assistant, his family, and Zion home in the .

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　Rubina, Amanda, and Greena stayed behind in the village of Kaina with Freddy and Ellis, who also stayed behind, to relax for a few days.



　However, since Ellis and Freddy are the official lords of the village of Kaina, we might say that they are on the side of Gulina and the three others.

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"Take it easy," Ellis said, "and enjoy your stay.

　said Ellis, while Greena and Freddy were busy getting to know each other since it had been a while, and Rubina was holed up in the library of the Nido Castle, reading materials.

　Rubina was holed up in the library of the Nido Castle, reading books, especially about the of Jin's world.

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"Hmm, so this is how it works. ......"

　The contents of the book are mainly descriptions of the model airplanes that Jin remembered and the results of his experiments in our world.

　The contents are more practical than theoretical, which is perfect for Rubina's purposes.

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"Hmmm... ......"

　When I read the book before, I felt like I had memorized it somehow, but when I read it again after learning to actually make things, I found many new things.

"Directional rudders and auxiliary wings are completely different things, even though they work to change the direction of the aircraft. ......"

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　In model airplanes, the rudder alone will turn the plane.

　In reality, however, by tilting the plane sideways, the rudder causes the plane to slide sideways, and that force is used as the centripetal force to make the turn.

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　In reality, ailerons and rudder are used together.

"Rudder alone was sufficient for model airplanes because they are small and light, but for actual airplanes, rudder is used in combination because they are large and heavy.

　Rubina interpreted the above in her own way as she read on.

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"The balance of the tailless plane ...... seems to be difficult. Jin-sama did a good job ......."

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　Rubina was able to gain a deeper understanding of , or , used by Jin this time.

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* * * * * *



"Wasn't that great, Jin-sama's flight?"

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"Yes, it really was."

　Freddy and Grina were impressed by Jin's technique that they had just witnessed.

　This is not a very s*xy topic for a date, but it doesn't matter, since both of them are engineers. The point is that we are similar.

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"I want to fly someday, too.

"Me too."

　Freddy said, to which Greiner responded,

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"Oh, Gulina, you haven't flown in the sky in a plane you made yet?

　Freddy asked in surprise.

"Yes. ...... exactly, I've tried to fly a little, but I've never flown freely like that."

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"I see. That would be ......."

　Freddy looked a little distant and then said, "If you'd like, I could take a look at it for you,

"If you want, we can work together to develop it.

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　Freddy looked a little far away and then said to Greiner, "If you want, we can develop it together.

"Oh, that's nice."

　Gulina was very interested in this proposal.

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"It would be too reckless to aim for Jin-sama's level, so I'd like to first develop the ability to build an aircraft that can fly safely and reliably," she said.

"I agree with you."

　At the moment, Grina's magical engineering skills were still better than Jin-sama's, but she knew that if she continued at this rate, she would soon be on the same level as Jin-sama and would soon overtake him.

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　However, she is content to let that be the way it is and is happy that she is able to see her lover's abilities improve.

　Perhaps it was because of this aspect of her that she had fallen behind Rubina in the competition.

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"Shall we do it in the workshop at Nido Castle then?

　Of course, he would have to refuse Jin's offer, but it was unlikely that Jin would refuse for such a purpose.

"Yes, that's fine.

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　Gulina also agreed to do it.