Under Lynn's extremely 'kind' gaze, Darren swallowed with difficulty and immediately shut up.

Lydia asked in surprise as if she had remembered something. "Professor Lynn, did Master Helram ask you to come? Have I already passed the exam? ”

"The purpose of my coming here has nothing to do with Master Helram!" Lynn rejected the girl's speculation, and then spoke again in the other party's disappointed expression. "I was going to ask you to make something."

As she spoke, Lynn took out a parchment scroll from her pocket and handed it over, Lydia reached out and took it and looked at it a few times, and couldn't help but exclaim.

"It's so pretty......"

On the parchment roll is a very large, novelty-looking alchemy machine.

The top is like an upside-down oval sphere, and the bottom is connected by a rope, similar to the hull of a ship, and even the internal structure is drawn very clearly, the overall frame is complicated but not messy, revealing a strange beauty.

"What is this? The latest alchemy ship? Lydia asked, surprised, as she saw the propellers and rudder on it, something only ships use.

"It's called an airship!" Lynn replied.

At first, he actually made a hot air balloon out, which was the easiest way to fly into the sky without magic, but after thinking about it carefully, he gave up this idea and simply prepared to get an airship that could sail in one step!

The purpose is naturally not just to look good, he has already inquired in the past few days.

Although some of the three-ring wizards who are proficient in the elements and shaping science can fly in the sky, the consumption is too great, the flight altitude is limited, and the speed is not fast, only the great wizard can stay in the air for a long time, and it is generally not used as a means to hurry.

And the island under their feet is very large, with many mines, and the entire wizarding city is built next to a huge magic mine in the center of the island, and it is not easy to transport it by land.

For example, from the port of Iyeta, it takes seven or eight days to load a batch of goods with camel beasts and go around the mountain road to the land of wizards, and there is a possibility of monsters attacking you along the way.

It's not the same if you're flying from the air, at least half the time, and even though the airship has too much payload, it's still cost-effective to transport some important materials or novelties that aren't available in Wizarding City.

In addition, the steam airship itself is also a commodity, as long as you put two magic crystal cannons on it and bless some protective spells, then it is a mobile flying fortress!

It's not easy to sell this thing for thousands of magic coins.

As for the problem of technology leakage, there is no need to worry about it in the short term, as long as he can get the steam airship out and fly around the sky, he can apply to the parliament for alchemy patent protection.

Yes, in the Wizarding Lands, there is a protection mechanism for the crafting recipes of various magical items, and only in this way can wizards publish the results of their hard research.

In fact, in addition to alchemy items, the same is true of those high-level magics, even in his capacity as a professor in his academy, he can only learn some low-level magic for free.

As for the long run, there is no need to worry, what he took out was just low-level toys, and after a few years, when he figured out the situation in the wizarding land, he directly came up with an internal combustion engine, and the so-called steam airship was as slow as a snail in the sky.

"Airship, a ship that flies in the sky?" Lydia asked impatiently.

"yes, that's pretty much it." Lynn nodded.

Lydia immediately seemed to have found some treasure, her eyes flashed with excitement, but she soon found that there were no wings similar to wings on the design of this airship, only a small propeller, and the power provided was definitely not enough for the airship to levitate, it should only be something used to adjust the course.

"Can this thing really fly?" Lydia asked curiously, was it the need to perform some kind of magic?

"Of course you can fly." Lynn said with certainty, then continued with a smile. "Do you know why wood floats on water?"

Lydia shook her head in confusion, isn't it common sense that wood can float on water?

Lynn explained. "Because wood of the same volume is lighter than water, which means less dense than water...... You can try it, not only wood, but anything of the same nature can float on the water, and vice versa they will fall into the water. ”

"And the fact that an airship can fly into the sky is the same as a log floating on water! As long as the density of the gas in the gas chamber is less than that of the normal atmosphere, it will not be a problem to fly. ”

Lydia listened attentively and nodded as if she didn't understand. "Then we sit on the airship, just like we sit on the ship, with the help of this very light gas to rise into the sky, right?"

"Your comprehension is very good, but your knowledge is too little, if you can take a few more lessons of my Olympiad math class, maybe you can design your own flying machine!" Lynn said with emotion.

Hearing Lynn say this, Lydia's originally happy expression immediately froze, and then she cried with a sad face, she had to join the Iyeta Academy to learn these knowledge, but the key thing was that she had to fly into the sky before she could pass the assessment......

It looks like an endless loop......

"If you can make the airship according to the design drawings perfectly, then for the first flight, you can consider letting you fly it." Lynn said with a smile. "I remember that you and Master Helram made a pact to fly in the sky without using magic, which is barely enough."

"Can I really drive it?" Lydia jumped up excitedly, and then hit her head on the frame of the wing, tears rolling in her eyes in pain, but she still covered her head and looked at Lynn.

"Of course you can, but first of all, I'm very demanding!" Lynn said freely.

Although one of his purposes this time is to fool... Cough... Recruit the halfling girl as his assistant and help him make and sell the new creations, thus freeing up more time to study magic.

But the way of doing things is also very important, if you directly invite people to help each other, I am afraid that it will arouse suspicion and will not achieve good results.

Only by forcing the other party to win the opportunity through their own efforts will people cherish it, and they will be more serious when they learn Olympiad mathematics in the future.