Let's not show the Sima family first, now, even if Zhao Feng wants to take care of the Sima family, he doesn't have that mind, because there is good news - the hot air balloon has been successfully developed!

Master Wang and Ma Jun first made it with cloth, although the small one can be successful, but a little bigger, due to the serious air leakage of the cloth, it can't rise. Then the research institute replaced the cloth with an oilcloth, but the durability of the oilcloth of this era was not good, and it soon broke at the seams.

The two changed a variety of fabrics, and finally went to the textile factory, where they specially asked for a very wear-resistant cloth, which was then sewn into balloons with very thick stitches, coated with tung oil, and dried. In addition, the inner tank is burned with charcoal and coal to produce hot gas, and finally the hot air balloon can carry animals.

After the experiment was successful, the two of them immediately came to Zhao Feng's house to report, it was really exciting for them, it was really as Zhao Feng said, so that this thing called Feitian could go to the sky! That would really carry animals, even people, into the air!

However, whether they can carry people or not, and what the danger factor is, they do not have a spectrum in their hearts, and today, it is a manned flight!

"Lord, Feitian has been successfully developed, today is the experiment of flying manned, please go and observe!" Master Wang said.

"Really?" When Zhao Feng heard Master Wang's words, he was also pleasantly surprised. He didn't expect the hot air balloon to be developed so smoothly, even if he explained the precautions to the two of them, even if he explained to the two of them how to make it! In Zhao Feng's opinion, if the two of them want to develop a successful hot air balloon, they also need to use ten and a half days, but they didn't expect that only seven days later, the two of them will study the hot air balloon!

"Yes, please go to the lord!" Master Wang said again.

"Good! I'll leave you with you! Zhao Feng nodded, got up and followed the two to a clearing in the suburbs.

I saw that in the open space in the suburbs, a huge balloon was tied to the ground by more than a dozen ropes. Underneath the balloon is a huge hanging basket that can carry several people. Inside the gondola is a huge fire, surrounded by refractory materials, which is burning, constantly sending a large amount of hot gas to the inside of the balloon. The balloon has been bulged into a large ball, and if you untie the cable, the balloon will be lifted into the air.

As he walked, Ma Jun excitedly introduced the development and experimental process of the hot air balloon to Zhao Feng.

Ma Jun spoke extremely excitedly, and Zhao Feng listened to it with relish, and in the end, Zhao Feng frowned and asked, "Master Wang, are you sure that there will be no safety problems in this manned flight?" ”

"It's about ninety percent, and the rest is one percent, I can't guarantee it!" Master Wang said.

"Since it's dangerous, then don't go to the experiment yourself!" Zhao Feng looked at the posture of Master Wang and Ma Jun, as if he was going to experiment in person, so Zhao Feng persuaded him.

"Lord, it is precisely because of the danger of this matter that I can't just let my apprentices go, and I am hiding here If I succeed, it's okay, we can share this achievement, but once it fails, everyone who is flying above the sky will die, how can I bear it? I don't know what the big reason is, but I'm definitely not going to do that kind of thing that puts people in danger and makes a name for itself! Master Wang said.

Master Wang knew that today's incident would definitely go down in history. You must know that this is the first time that a human has taken off in a hot air balloon, and even if it fails, he will get on it. for his name will forever be remembered in the annals of history.

Seeing that Master Wang said so firmly, Zhao Feng simply stopped trying to persuade anything, but said with a little nervousness and concern: "Be careful in everything!" ”

"Hehe, don't worry too much, my lord and Ma Jun have discussed it, he will watch from below to see if there is any imperfection in this flying sky!" Master Wang smiled and boarded the hanging basket of the hot air balloon with a few of his apprentices.

After that, after Master Wang checked that there was no problem, he made a gesture to take off. Ma Jun and the others below began to untie the cable that tied the balloon. Soon the hot air balloon was slowly lifted into the air.

The balloon rose smoothly without incident, and when it came to a standstill in the air, cheers were immediately heard from the ground.

Zhao Feng also smiled, so that the hot air balloon was a success. In the future, it will be much more convenient to observe the enemy's situation in battles, or to raid some cities that are difficult to enter.

The hot air balloon rose so high that it only looked like a rough idea from below. A gust of wind hit, and the balloon drifted slowly into the distance with the wind.

Zhao Feng immediately ordered the cavalry to be dispatched, followed by the hot air balloon, ready to protect at any time to prevent news from leaking.

About an hour later, the hot air balloon floated thirty miles away, and finally the hot air balloon slowly fell due to Master Wang and his apprentices, who slowly reduced the addition of charcoal and coal. Then he was deflated and taken back to the city.

Many people in Xiangping saw this scene that day, but they didn't know what a hot air balloon was, let alone how many people were in the hanging basket under the hot air balloon. Therefore, most people regard this as a fairy manifestation and worship it. Zhao Feng, on the other hand, ordered all the blacksmith shop members and participating soldiers to keep silent, so the people didn't know what it was.

The telescope has been put into production, and now the hot air balloon has begun to take shape, and it is ready to start producing, Zhao Feng is extremely happy in his heart, so that whether it is to conquer the mountains and Yue, or to fight against foreign tribes, he can be regarded as having a secret weapon!

However, the number of people in the hot air balloon developed by Master Wang is really a bit small, and each hot air balloon can only carry ten people, which is already the limit!

This is also a helpless thing, after all, the hot air balloon can't carry too many people at its limit, and it is too difficult to load people like an airplane!

However, even so, Zhao Feng was already very satisfied, and he ordered the textile factory to fully cooperate with Master Wang to make 3,000 hot air balloons as soon as possible!

On the other hand, Zhang Xiu's air force soldiers have also been selected, under the instruction of Zhao Feng, Zhang Xiu gradually began to learn the take-off of hot air balloons, landing, floating in the air, etc., and gradually began to train soldiers in the hole, but this is very troublesome, fortunately, there is still time, and the soldiers selected by Zhang Xiu are very elite, brave, and the learning ability is also a top one!

So in the period before the expedition, Zhang Xiu's time was still enough! The only thing that is more difficult is that the hot air balloon can only rely on the wind to move forward, so how to use the hot air balloon to attack the mountain has become a problem!

(End of chapter)