Over Wuhun City,

At this time, there are countless red hydrogen balloons floating, and there are huge vertical banners of dozens of meters hanging below, all of which are gold characters on a red background, and the characters are as big as a bucket, and they can be seen clearly from a hundred meters away.

All banners have different slogans written on them, such as:

"The people of Wuhun City welcome you."

"Working people are the most glorious."

"Salute to the workers who are struggling on the front line of home construction."

"The fifth residential area of Haotian District of Wuhun City has been completed, and the accommodation application has begun."

。。。。。

And so on, much the same.

They are all positive energy and propaganda slogans for various things.

Compared with the newspaper that looks down, the vertical slogan of the hydrogen balloon that can be seen when you look up is more eye-catching.

After the electrolysis of saturated salt water successfully obtained hydrogen, Tang Sankong thought about making hydrogen balloons for propaganda, in the early history of large hot air balloons and hydrogen balloons sewn using cow inner intestinal membranes, there are also "Kong Ming lanterns" with paper paste, and some are made of sewing with a layer of sealing paint on a thin silk brush.

The large hydrogen balloons in Wuhun City are all made by the latter, and the hydrogen balloons made of rubber are mostly small toys or decorative purposes, and have little practical value.

Lou Gao was very excited after seeing the hydrogen balloon rise into the air, and kept shouting to tie himself to it so that he could experience the feeling of flying, Tang Sangang was sweating wildly after hearing this, Master, you will really die!

However, this also gave Tang Sanbar an inspiration, and he learned about the manned travel experience of hydrogen balloon or hot air balloon.

It is also a tourism project that belongs exclusively to Wuhun City.

In a previous life, the earliest manned flight in history was a hot air balloon, a full 120 years before the Wright brothers' plane took off. Mankind's yearning for the sky has never stopped, but it was not until the advent of hot air balloons that manned navigation became a reality for the first time.

Just do it, Tang Sangang immediately arranged for someone to make spider plants, and then make a large hot air balloon, with fire dance to provide flames to rise into the air, and then a wind soul master to blow the wind to control the direction, and a mini version of the Kirov airship was completed.

It's a pity that there are only relatively few soul masters in the Douluo Continent who have the ability to fly martial souls, and they can still find a team, and a slow-moving unit like the Kirov airship is simply a live target.

Three days later, a large hot air balloon with a diameter of 15 meters was completed, using the same material used for the hydrogen balloon, with a wide spider plant large enough to seat five or six people, while the hydrogen balloon was much smaller, with a maximum of three small women, or two normal-sized men, also to be on the safe side.

Tang Sanbar had heard a lot of news in his previous life that the rope tied to the large hydrogen balloon spider plant was broken, which led to a tragedy, and the expansion of the radius of the hydrogen balloon would also increase the risk factor.

"Hey, why isn't this hydrogen balloon closed?" Lou Gao looked at the workers who were blowing up the hot air balloon, and was very puzzled.

"This is a hot air balloon, not a hydrogen balloon, which is difficult to control the direction and land after liftoff, but the hot air balloon is different, you can wait and see." Tang San sold a pass, waiting for the hot air balloon's airbag to fully bulge.

When the airbag was filled with air, Tang Sankong summoned Huo Wu, let her ignite the flames, and heated the air in the air bag, although Huo Wu was puzzled, he still did so, and the Hokage appeared behind him, the flames in his hand churned, and he drilled into the gap.

"The temperature should not be too high, be careful if you ignite the air bag."

Huo Wu nodded, precisely controlling every bit of flame, when the air in the airbag gradually heated, under the law of the world where the heat rises, the balloon gradually pulsates back, straightening its body.

"That's it! Help me call Dugu Yan, Mr. Lou, two more and we can take off. ”

Lou Gao naturally trotted excitedly to find someone, in the same industrial area, he and Dugu Yan Dugu Bo were also very familiar with each other for half a year.

Huo Wu glanced at Tang Sankong, "What's the matter, you fell in love with that guy who played with drugs again?" ”

Tang Sangang's face turned dark, and he said angrily: "What do you think, Dugu Yan has a sweetheart, and am I that kind of person." ”

"Isn't it?"

"Of course not!"

Tang Sanbar's face was full of righteousness and righteous words, he had always liked to be passive.

"Humph! I heard that you are merciful everywhere, in addition to His Majesty the Pope, Xiao Wu, Zhu Zhuqing, there is also a girl named Qianyue who likes you, and I heard that Hu Liena of the Wuhun Hall is also interesting to you. ”

"It's all rumors, fake, fake, I've only seen that Hu Liena twice, and I haven't recognized my face yet, where did this matter come from, and where did you hear these news?" Tang Sangang looked puzzled, he really didn't know about this.

Huo Wu looked at Tang Sangang as if he were a big pig's trotter, "The place where I live is very close to the Martial Spirit Academy, you understand." ”

Tang San said in his heart that I know a fart, a few of you are enough for me to drink a pot, and a few more people will really be my Lord Wei.

"I'm not, I don't, don't talk nonsense!"

Just as Tang Sangang and Huo Wu were arguing, Lou Gao appeared with Dugu Yan and another person he hadn't seen for a long time, that was Yu Tianheng.

Tang Sanbar hurriedly diverted the topic, "Xiaoyu, when did you come?" Why don't you tell me, I'll pick you up. ”

The words were extremely cordial, and he did not regard this person who was very likely to become the future boss of the Blue Electric Tyrannosaurus Rex Sect as a stranger, as if he had not seen an old friend for many years.

Yu Tianheng looked embarrassed, is this how the strong call others? It's really unique, it's good for you to call Xiaotian!

"Hahaha, Donald, I haven't seen you for more than a year. I also passed by Wuhun City and stopped by to see the geese. ”

"Don't worry, your geese can't fly."

Tang Sangang looked at the two with a smile, Xiao Biesheng was newly married, and these two were in a long-distance relationship, Yu Tianheng said that he was passing by, did anyone believe it? It is best to let Dugu Yan keep Yu Tianheng for a year and a half, and after living in Wuhun City for a while, he will completely like this city, and his impression of Wuhun Hall in the past will be greatly changed.

Yu Tianheng and Dugu Yan smiled, everything was silent.

Dugu Bo sighed when he watched this scene from a distance, the daughter was not staying, and the granddaughter would have to leave sooner or later, but what should I do if there was no movement on my side? After all, I'm getting older...

Lou Gao was already impatient when he watched them flirting and scolding, and hurriedly shouted: "Hey, today's protagonist is this hot air balloon!" It's not up to heaven yet! ”

After speaking, he jumped directly into the spider plant, Tang Sangang had to let everyone enter the spider plant first, support the workers, let the fire dance gradually increase the firepower, the air bag pulled the spider plant tightly under the action of heat, when the buoyancy generated by the hot air balloon was greater than five people plus the gravity of the spider plant, the hot air balloon led the spider plant began to rise gradually.

The workers below widened their eyes, this was the second object they had seen that could fly after the hydrogen balloon, and it was also capable of manned flight.

Tang Sangang looked at the familiar scene below and his heart did not fluctuate, but for the first time, Huo Wu and Lou Gao, who looked at the ground from a height of dozens of meters, were excited, Lou Gao tightly grasped the spider wall, his eyes glared at the boss, and his joy could not be hidden at all.

Looking down from here, Wuhun City seems to be in one hand, the outermost ring road called the "Second Ring Road" has been built, and the road extending outward from the city wall connects it, plus the inner part of the street that is beginning to take shape, like a spider web separating the various blocks.

The various factories in the industrial area look like toys the size of matchboxes at this time, while the martial arts area in the center is full of ranks and prosperity, and it will take a lot of time to let other districts catch up.

"It's a great feeling!"

Lou Gao jumped up excitedly, almost falling out of the spider plant, Tang Sangang hurriedly held it down, and at the same time asked Huo Wu not to stop the flames.

"You're too early to be happy, where is this!" Tang Sangang said with a smile,

"How can you not be happy! It's the first time I've seen the world from such a high vantage point! I also experienced the feeling of a giant once! ”

Tang San was embarrassed, which giant could grow nearly a hundred meters tall.

"Let's take you to see the scenery of other places!"

casually released a wind skill, and the hot air balloon was blown away from the sky above Wuhun City, and at the same time, the fire dance was not strengthening the firepower, and the hot air balloon always remained at a safe height. After all, no matter how high it is, the airflow is disordered, and it is easy to go wrong.

There was an inexplicable brilliance in the eyes of the fire dance in the air, and the distance between the ground became as if it were one step away at this height, and her heart seemed to be getting closer and closer to this guy.

Lou Gao is still looking down at the ground, and Yu Tianheng and Dugu Yan are already intimate, such a beautiful scenery, how can you not seize the opportunity?

Huo Wu stepped forward and put his lips on it, holding Tang Sanban tightly in his arms, Tang Sanban only felt very soft and comfortable at this time, if only there were two people, it would be good if there were only him and Huo Wu,

Isn't it a day on this hot air balloon?

While Tang Sangang was thinking wildly, Huo Wu let go of his arm and pushed him away, as if nothing had happened, but his face turned crimson and glared at Tang Sanbar, as if she had suffered some big loss.

Tang Sangang looked confused, is this because there are people around?

Let's do it another day...

The hot air balloon flew around Wuhun City, and finally returned to the industrial area, Lou Gao was so excited that he trembled, and he didn't know if there was a fear of heights in it, but the others were quite normal, Tang Sangang said a few key points that needed to be paid attention to in the manned flight of the hydrogen balloon, and let Lou Gao make it himself.

As for this hot air balloon, other excellent flame-based soul control masters can also control it, so it can be regarded as an amusement project. Of course, publicity is also an essential part of making everyone aware of it.

Moderate relaxation is beneficial to the body and mind, and can improve work efficiency, this sentence Tang Sangang thought it was true, and sure enough, a week later, Dugu Yan successfully took out nitric acid.

The air is rapidly cooled down to a liquid state, and then the nitrogen and oxygen are separated by slowly heating up with a lower boiling point than oxygen.

Nitrogen and oxygen go through two steps under discharge conditions to produce carbon dioxide, which is dissolved in water to form nitric acid.

The whole process is only used by the ice soul master and the thunder soul master, which are efficient and pollution-free, and are really pioneers in energy conservation and emission reduction.

。 The fastest update URL for the mobile version: