The hero magician wants to relax. He was too active and targeted for his life, so we'll start over.

"Helicopter......? Master."

Near the fountain in front of Willidis Mansion. Yuna, the magic instructor and apprentice of silver-haired boobs, turned into a suspicious face to the first word she heard as the afternoon sun fell.

"Um, is that the helicopter you're holding?

"No, this is bamboo"

Made bamboo out of Dungeon Core (Safilo) Magic Generation, sharpened it and I made it.... Bamboo dust has been around since I was a kid. I've made it at Grandpa's house.

"This is a toy, but this is how..."

Releasing as he turned the axis, he jumped up into the sky by two spinning wings.

Yuna, and Early and Bell, who watched it, leaked "heh".

"You flew."

"You flew."

Bamboo dust, which spun and flew well, eventually lost its spinning power and fell.

"You fell."

"You fell."

Put the two together, I'll go pick up the bamboo. Yuna followed me.

"With the magic of levitation, you can fly"

"Don't you see? You don't have to use magic to fly."

If I point it out, Yuna stared at Bamboo Tong with an indescribable look.

"But I fell"

"You don't keep flying all the time. So all the time... No, there are limits, but flying for a long time is a helicopter."

Helicopter. A type of aircraft also known as a rotary-wing aircraft. Generate lifting force with rotating wings called rotors and fly in the sky.

Again, I spinned the shaft and flew the bamboo.

"Yuna, that bamboo toy is flying through the sky with the rotating wing creating lift"

"... it will fall soon."

He said he didn't have a body or a lid. Although it is true.

"As a result of the loss of lift to gravity, that bamboo stump falls. So, if that thing keeps spinning all the time, which means if you keep generating lift and beating gravity, what happens?

"... keep flying, will it"

"Excellent. That's the principle of helicopters flying"

You've gotten one smarter again. I handed Yuna the bamboo dumplings. She often flew bamboo. With floating magic, not spinning it.

"This one's easier"

"For you. But can you do the same thing to Marcus or Croix? Right now."

"I can't do it without telling you. Training is also required. And the ability to manipulate magic."

"But bamboo dust will allow you to fly quickly."

Yuna accepts bamboo dust that unravels. Early came.

"Teacher Yuna, can I play with that bamboo?

"Go ahead."

Early, who receives bamboo dust from Yuna, tries to fly with her hands together and spin it around like I just did. I struggled at first, but after doing it twice or three times, I started flying straight.

"On a large rotary wing, if you power the axis to keep turning, you can manipulate the rotation, creating a vehicle that flies through the sky"

"What is power, a demon stone engine?

"Your Answer"

The truth is, engines don't have to be big, but if you connect them with demonic stones and magic letters, they fly to some extent.

Yuna shrugged her little neck.

"Using a demon stone engine means relying on magic after all?

"Yuna, using the magic of a demon stone seems to be similar to using magic."

"How is it different?

When it comes to magic, it is Yuna who asks questions relentlessly for the price. Maybe this is her identity from a child who seems to have been bewitched by magical geniuses.

"It's not that hard to talk about. Water faucet at Willidis Mansion, for example. Even if you can't use magic, you can get water out, right?

Actually, there was no magic in the world I was in, and I was flying in the sky in an engine, a device, separate from magic. Using magic is just an alternative.

Having obtained a high purity demonic stone in a dungeon that was in the land of Willidis. The first thing I wanted to make with it was a helicopter.

For whatever reason, it is because of the creation of a floating iron horse.

Because that is also a vehicle for converting the magic of a demonic stone engine into floating magic and floating off the ground to proceed. The manoeuvre is similar to helicopter maneuvering.

The iron horse floating type carries out the ascent and descent with the strength and weakness of the magic used for floating. Adjusting the inclination of the center of gravity during flotation allows for forward, rear, left, and right movement.

The helicopter, by contrast, rises if the lifting force beats the weight. Conversely, if the lifting force loses weight, it descends. Stationary in the air, called hovering, is with lifting force and weight suspended. Up, down is the strong and weak propulsion of the rotor. The front, rear, left, and right movements are carried out on the rotating surface of the rotor, with its inclination.... Look, they look alike, don't they?

So, based on a floating iron horse, attaching shafts and rotary wings, adding to floating magic, and using lifting force to fly faster and higher, is the history of the idea of a demonic stone engine-mounted helicopter.

Dungeon construction runs through the hills with Willidis Mansion and expands the underground giant hangar in the northeast direction. Create an opening through which large vehicles, helicopters, etc. can pass on both sides on the eastern side, which is flat with the northeastern direction being a cliff. An underground hangar is like a secret base, it's romantic, isn't it?

This basement hangar is connected to a section with laboratories and other laboratories deep in the center of the ground floor, allowing access to and from the mansion. However, I think about noise and other issues, so I keep it away from the residential area.

Now, it is a prototype helicopter production of iron horse improvements.

The body of the iron horse shall be enlarged for the convenience of mounting the tail boom with the tail rotor on the rotating shaft, the improved engine and the main rotor.

Prototype One would be fine on its own. I will actually operate it, test it to fly properly, and improve it by giving more accuracy to each part. I think I will also make a double seat, a larger general-purpose helicopter, etc.

Essentially, it magically rotates the rotating wing that creates lift. The Demon Stone engine is the power for that, and the Magic Tank hits the fuel tank.

The operating system is simple.

Adjust the angle of the rotary wing by moving the joystick. This is the same as an actual helicopter. That's what I taught you when you used to let me fly a radio cone helicopter. Because of the difference in propulsion force in the tilting direction, it is used to advance, retract, and pivot the fuselage.

The rise or fall is the strong or weak adjustment of the rotation of the main rotor. The upper and lower controls are referred to as throttles, so the operation is carried out with a lever. It's called a throttle lever.

Well, like when you're in a car, you need to connect the magic transmission lines to where you need them and carve out the effects of magic letters.

As for the size and shape of the rotor, the only way to do this is to try and error it in flying away. Although I am not an expert amateur there.

Together, prototype helicopter production progressed while attracting ambient interest.

Marcus liked the iron horse floating shape and was intrigued by the helicopter. The same goes for Early, who supported my work while helping me refill my magic at the couple's mercy.

Yuna, too, sometimes healed me with that splendid breast while helping me work as my apprentice.