Rubina is trying her best to analyze Jin's <.

"How in the world is he getting the acceleration that even my <> can't keep up with ......?"

The output of the <> is determined by the strength of the wind magic used.

The propulsive force is obtained by the reaction of blowing wind, which means that it depends on the speed and volume of the wind.

The more air is sucked in and blown out with more force, the greater the propulsive force.

"So <> is increasing the amount of air it sucks in. ...... I can't believe it still can't keep up."

Yes, Rubina's <> was to push in more air with the magical jet propulsion engine (magijet engine) of the <.

This was achieved by using wind magic to increase the density of the inhaled air. This was Rubina's method.

The disadvantage of this is that the pressure inside the engine is correspondingly increased, which shortens the life of the lightweight engine.

"When you strengthen an engine, it becomes heavier because of that. ......"

So how does Jin manage to achieve strength and weight reduction.......

Rubina thought.

* * *

"Okay Reiko, keep up the good work and keep chasing a little longer."

Jin, who gave instructions to Reiko from the director's seat, wondered what Rubina was thinking now.

From Jin's point of view, what Rubina and the other engineers on Onogoro Island lack most is experience.

He wanted them to experience that, so they were playing a game of chase instead of a shooting match in the air.

"I hope they learn something through this mock battle. ......"

Some skills are learned not just by being taught, but by discovering them for yourself.

Jin was confident that Rubina would gain something from this.

"She's a genius, isn't she?

Jin thinks that Rubina is a who thinks it would be better to do this way based on .

Therefore, she is good at skipping the trial-and-error process to complete her work.

Therefore, if he learns to <> in this area, he will be able to improve his skills even more.

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

"......Yes, or ......Efficiency and output characteristics of an engine can't be determined by wind tunnel tests. ......"

And, as Jin had hoped, Rubina was gradually gaining clues to further improvement.

"The engine can also be tested repeatedly on its own to determine the optimal nozzle shape, compression ratio, and so on. ......"

The <>, which had been built with <> and some experience.

Rubina realized that there was still room for improvement.

Jin's plan seems to have succeeded so far.

* * * * * * * * * * *

"...... Jin-sama is amazing after all, isn't he?"

"Yes, he is. Do you know that, Goh?

"Yes."

Gou, along with Daiki-Kokona and his wife, are watching the game behind Jin's seat.

Therefore, he had heard Jin's instructions to Reiko, and he understood that Jin was trying to make things happen with Rubina in mind.

At the same time, he knew that he was also teaching himself, who was watching in the background.

"I didn't have the aptitude for engineering magic. ...... I envy those who can participate in these competitions."

Daikie said, and Goh said,

"I understand a little bit. ......I, too, had only been admiring and watching until I participated this time."

I've only been admiring it for a long time until I participated in this event," he said.

"Well, that was ...... the case."

"You had your moments, too."

Elsa was also in the supervisor's seat, but she was silent and stayed in the corner, looking out for Mr. and Mrs. Daiki-Kokona and Goh.

She was looking at the three of them.

（It seemed that Mr. Daiki-Cocona and Mrs. Daiki-Cocona liked Mr. Goh. (It seems that Mr. Goh seems to be comfortable talking with the two of them.)

Erza thinks that if Daiki-Cocona adopts Goh, everything will be all right.

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

< chasing after Jin-sama's !　Both sides have yet to fire their ray guns, but it's a very spectacular air battle! >>

So far, the battle has ended with the chasing the which is 600 meters ahead of the .

But even this was on a higher level than any other air battle I have ever seen.

The speed was different.

Even vertical ascent was over 400 km/h, and vertical descent was supersonic.

The average speed was probably around 800 km/h.

If the aircraft made a sharp turn at such speed, the gravity on the aircraft and the pilot would be several tens of Gs.

It is no wonder that the spectators were excited to see such an aerial battle.

>

A dogfight at an altitude of around 3,000 meters.

The high-speed dogfight kept the audience's eyes glued to the ground.

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

"...... is about time. Reiko, let the battle begin.

<

The chases after the which is flying horizontally.

The distance is about 600 meters.

Suddenly, the < raises its nose and brakes with its entire body.

This is the same action that Rubina showed in the first round of the tournament.

Reiko and perform a more complete maneuver.

< overtakes the in no time.

And then, after regaining his position, has the in his sights.

Rays of light are fired.

But, as expected of Rubina, she is not just shot.

She tried to get out of the line of fire by jinking (moving her body up and down, left and right in small increments).

Therefore, the rays of light hit the aircraft in the middle of the main wing.

The aircraft was judged to be damaged and the competition continued.

Rubina, who judged that she would be out of her depth at this point, decided to use a that she had installed in her <>.

"I was able to add it because Jin-sama gave me permission to modify it, as a last resort. ......!"

And <> is .............