Goh and Rubina's < is smoothly completing the test items.

So far, there have been no major malfunctions.

The maximum speed when using the <> is 1105 km/h. This is a subsonic speed. This is subsonic speed.

The aircraft has good mobility.

The maximum G-force applied to the pilot was less than 7 Gs so far, almost the same as that of a modern Earth jet fighter.

These values are sufficient for a trained pilot to fly the aircraft.

Then came the test of a new innovation, a parachute for emergency landing.

At an altitude of 4,000 meters and a speed of 400 kilometers per hour, the engines are shut down. The plane begins to glide.

The delta wing has a low wing loading, and the plane was stable even when it dropped to 200 km/h due to aerodynamic drag.

However, when the speed drops below 150 km/h, the plane becomes a little unstable.

Sky1 then deployed its parachute.

The parachute was opened at once by wind pressure, and after a sudden impact, the speed of the plane dropped dramatically.

Then it descends slowly.

The speed was about 20 kilometers per hour.

Goh and Rubina, who were watching the parachute on a monitor, said, "The parachute itself was successful,

"The parachute itself was a success, but ......

"The speed of the fall is faster than expected.

They looked at each other with a scowl.

At 20 km/h, the plane would be destroyed when it hit the ground, and the occupants would also be hit hard.

It would be like riding a bicycle very fast and crashing into a wall.

"It's better than crashing, but it's an improvement."

"Yes, it is."

When they had finished taking the data, the two thanked Jin for his help. Jin then instructed Sky 1.

"Sky 1, that's enough. Release the parachute, restart the engines and come back."

<

Sky 1 receives Jin's instructions, releases its parachute, and restarts its engines.

For a moment, it looked like it was going to stall, but regained its bearings and continued its flight without incident.

Three minutes later, landed safely on the airfield behind the institute.

The aircraft landed safely at the airfield behind the institute.

After the test flight, the crew members gathered at the institute's cafeteria for a review meeting.

"What is the score of from your point of view, Jin-sama?

"Yes, 92 points in total.

That's a perfect score out of 100, right?

That's right.

Yes.

Rubina jumped up and down with joy, knowing that she had received a very high score.

Goh, too, was overjoyed, his cheeks rising.

But...

But Goh was also very happy, his cheeks brimming with joy.

he asked calmly.

"Well, ......5 point is the parachute effect."

"Yes, ...... we weren't happy about that either."

What about the other three points?

The first two points are that the landing was a little unstable. The landing gear was probably not strong enough."

"Oh, ......"

Landing is more difficult than takeoff. And if it's going to be piloted by a human, it shouldn't be designed to be on the edge."

"You went a little overboard. ......"

Goh and Rubina regretted that they had reduced the weight a little too much.

"So, I'll let ...... Sky1 explain the other point. Sky1, how did you respond to the throttle?"

"Yes, I'll answer that. The throttle was a little sensitive.

"Yes."

Why ......?

The two men tilted their heads. Since they can't seem to come up with a reason, Jin explains it to them.

"It's a human being who flies the plane, not Reiko or Sky1."

"Oh, I see. ......"

"I've adjusted it to the feel of the Nile VI and VII. ......

"I guess you get it."

In short, the two had adjusted the throttle as an extension of the Nile VI and VII that Reiko had piloted.

This time it was the Sky 1, but the setting was a little too sensitive for human beings.

Should I make it a little heavier?

"And maybe a wider range of movement for the throttle lever?"

"No, after this, we're going to incorporate a magic brain to assist in aircraft control, so you can have that assist you."

"Oh, I see. How about ......, Jin-sama?

"Yes, I think so. That would be good.

Okay.

"Okay."

With that, the review meeting was over.

The discussion on ideas for improvement was continued.

Goh and Rubina presented their ideas, while Jin was basically an observer.

Goh says, "First, we need to improve the parachute.

"That thing snapped the moment it opened, didn't it?

"Yes."

Sky 1 answered Rubina's question.

"I guess we should ...... put in a shock absorber in case the rope snaps or the connection on the fuselage breaks due to the impact."

"Yes, Rubina is right. But wait a minute."

But wait a minute...?"

A parachute is basically for vertical descent, right?

Yes, that's right.

If the parachute is not carried away by the wind, it is adjusted to descend vertically.

"Since we're gliding, why don't we make a shape that can take advantage of that?"

"Oh, that's a possibility. "Well, how about like a paraglider?"

"Yes, that's a good idea.

What else is there?

"I was simply wondering if we could increase the wing area."

Unusually for Goh, he suggested an unusual gimmick.

"It's a delta wing, so even if we increase it, it's still a delta wing. ......

"I know. ......"

It seems to me that the balance is going to be upset.

But..,

"Fowler flaps ......, right?"

Jin said.

The < not only simply lowers the trailing edge of the wing, but also increases the wing area as it moves backward.

In other words, the increase in lift is significant.

Jin had read about this in a book on model airplanes.

There is a flap mechanism that has been further improved on the present Earth, but we will leave that aside for the moment.

"Jin-sama, what is that?

It's called a Fowler flap. ......

That's the way it's done: ......

"It's used only at low speeds, because at high speeds, the air resistance is too great and it could cause a malfunction."

"That would be helpful."

I'll explain this to Goh and Rubina.

He was still too naive to be an observer.