"The fabric is made of the finest Songjiang cloth, and the needle and thread are also the most skillful ones, so you don't have to worry about the stitches not being dense enough," Mrs. Xia flipped over the already made "balloons" to Chu Fan to see, "According to your instructions, each seam is firmly pasted with strips of cloth." ”

Chu Fan is still very relieved about the things made by the quilt group - the women of this era compete the most, isn't it needlework, and the best women in Ushishima needlework are concentrated in the quilt group.

However, it was a matter of life, and Chu Fan still checked it carefully.

The hot air balloon was exactly what Yan Ruxue forced Chu Fan to come up with on the boat that day - if you want to go to the sky, with the technical level of the seventeenth century, you can only try a hot air balloon.

Of course, Chu Fan didn't make a hot air balloon just to please Yan Ruxue, this thing was too useful in the military!

Diamonds, that is, diamonds, Chu Fan had already bought some through the six families and hoarded them, just to polish the lenses; And Francis knew some of the methods of lens grinding when he was on the glass island, and now after pondering for a period of time under Chu Fan's guidance, he has been able to polish qualified glass lenses - on the day the first self-produced clairvoyant mirror came out, Chu Fan placed an order for 50 lenses for the Venetian!

But Chu Fan felt that it was not enough to have a clairvoyant mirror, if the observation point could rise by about 100 meters, then whether it was on the sea or on land, the warning range of the Fuliao Army would be expanded more than ten times at once! The sea can even reach a radius of dozens of miles!

So the hot air balloon must be made!

But this thing has very high requirements for workmanship - because the airtightness of this era is too difficult to guarantee, just relying on needles and sewing Chu Fan has no score at all, if he waits until he finds an air leak, then it is really a child's play with human life!

After checking it carefully, Chu Fan felt that the airtightness should be okay, and he planned to put on the rope and try it immediately.

"Rope? How thick is the rope? "Old Mrs. Xia has a very kind face. She was a very delicate person, and she put all the ropes that could be used in front of Chu Fan.

There are more than a dozen kinds of brown rope, hemp rope and cotton rope - the thickest brown rope is generally used on ships, and the toughness is very good; The hemp rope is of different thicknesses, and it is usually used to tie wood, which is not bad.

However, both ropes have one biggest drawback, that is, they are too heavy - Chu Fan is going to use steel charcoal as fuel. The calorific value of diesel fuel itself is smaller than that of later generations, and if the weight of the hot air balloon is too heavy, he is very worried that it will not be able to fly.

In the end, there was only a cotton rope left, Chu Fan chose a cotton rope with chopsticks thickness for a long time, and asked Mrs. Xia to weave a one-foot square cotton net pocket and cover the balloon inside.

After weaving the cotton net pocket, Chu Fan hung the rattan basket that had been prepared under the cotton net pocket - because it was experimental, it could be light. So the rattan basket is not very large, 1.5 meters in diameter and 1.5 meters deep, and there is a wooden strip on the upper edge of the rattan basket, on which is tied a brazier made of thin iron sheet, filled with steel charcoal, about 30 centimeters from the opening under the hot air balloon.

Seeing that the weather was good, Chu Fan decided to try hot air balloons right away.

After igniting the steel charcoal, Chu Fan and Doudou raised the mouth at the bottom of the hot air balloon and aimed it at the brazier. The rolling heat wave immediately made the soft Songjiang cloth ripple; Gradually, the hot air balloon became more and more bulging. Finally, I was able to stand upright without holding my hands in the palm of my hand - the rattan basket was originally tied to the ground with four ropes, and I was not afraid that it would fly.

After letting go of his hand, Chu Fan cut a piece of hemp rope of about 30 meters, tied it to the intersection of the cross wooden beams at the bottom of the rattan basket, and firmly bolted the other end to the stone stake that had been buried in advance.

He didn't tell everyone in advance what the balloon was for. So whether it was Doudou's guards or the female workers in the quilt group, they didn't know what he was doing, and their eyes were wide open, watching him perform as if they were doing magic. It wasn't until Chu Fan stepped into the rattan basket again and was about to close the door that Doudou reacted, rushed forward with an arrow step, and insisted on entering the rattan basket with him.

Chu Fan couldn't resist him, so he had to open the door and let him come up and try it, and found that the rattan basket was almost not sinking, so he ordered the other guards to untie the four ropes.

The steel charcoal had already burned red, and the balloon on the top had already stretched the cotton net pocket tightly, and with the untying of the rope, the hot air balloon "poof" jumped out, and a burst of extremely shocked exclamations suddenly broke out on the ground, and in the corner of Chu Fan's eyes, he also saw several female workers kneeling on the ground and bowing to the hot air balloon.

I have to say that the feeling of soaring up is quite good, standing in the rattan basket and watching the whole earth sink rapidly, Chu Fan seems to have returned to the amusement park of his childhood in the previous life, and when the pirate ship rises high, it is also the same feeling.

Just when Chu Fan was in a state of refreshment, the rattan basket under his feet suddenly stopped—the hot air balloon had risen to a height of 30 meters, and it was pulled by the hemp rope tied to the stone pile.

"Ah~~"

Chu Fan felt that his sleeve was being tugged on, and a trembling exclamation sounded in his ears, he turned his face to look, but it turned out to be Doudou, who had no prospects, his face turned pale with fright, cold sweat came out, and his hand pulling his sleeve kept shaking; Half-squatting with his eyes closed, he just didn't dare to straighten up and look outside.

"Damn, isn't it?" Chu Fan smiled and said, "Doudou, this is a little taller, look at it scares you like that!" …… Come, look outside, how beautiful! ”

Doudou's eyes closed tighter and tighter, and he shook his head tremblingly and said, "Soft!" …… Weak legs! …… My mother! …… I'm actually in heaven! ”

Chu Fan laughed, didn't tease him anymore, and looked around at the scenery, he rose from the foot of Nanshan Mountain, the height of 30 meters was coincidentally high with the fort on the top of Nanshan Mountain, and the two sides were separated by dozens of meters.

"Hey!"

Chu Fan, who was in a good mood, couldn't help but wave his hand at the soldiers who had already looked stupid on the fort, but unexpectedly, the other party knelt down with a "poof", and kept kowtowing to Chu Fan, and he didn't know what he was talking about.

Chu Fan didn't care about them anymore, and after looking around for a while, he felt a little bored - this is not a pirate ship, it won't fall suddenly, it just floats in the air stupidly, and he gets tired of it for a while.

In addition, more and more people gathered under his feet, so Chu Fan shouted for the guards to pull him down.

When he returned to the ground, Chu Fan realized how big a fuss he had made - as soon as he stepped out of the rattan basket with his front feet, a circle of people around him knelt down in unison, kowtowing and chanting, and a buzzing sound was mixed with countless "immortals", "immortals" and even "dragon princes" all came out.

Chu Fan saw that it was not a problem, and ordered the guards to put away the hot air balloon and fled.

It wasn't until this moment that Chu Fan understood that such a thing as ascending to heaven really couldn't be displayed casually, and it was equivalent to demonism in this era! (To be continued.) )