Emperor Xiaoyao of Tang Dynasty

Chapter 366 The Argument About Hot Air Balloons

"Cut, it's as if you didn't intend to sneak attack." Qin Huaiyu contemptuously gave Cheng Huaimo a look, "I sneaked up on me so many times when I was a child, it can be regarded as regaining my place!"

Cheng Huaimo hummed twice, sat down resentfully, but didn't rub the silk anymore. Although the hand feels good, how could there be any surprise surprise?
"I made my elder brother laugh. This is a game we used to play when we were young. One slap can pierce someone smartly, but the boss can only prick again after a while. If the interval is short, it will not be effective." Qin Huaiyuzhi gave Jin with satisfaction. Yu explained.

Static electricity, the happiness of rich people is so simple and unpretentious, poor children can't experience it.The farmers in my own village are living a much better life now than before, but the children are dressed in cleaner and more tidy clothes than before. They are still made of linen, which is still not up to the point where everyone wears silk. If there is any little guy If you don't open your eyes, find some silk cloth and rub your hands... It's a mess, so it's mixed with men and women, and you can't get out of bed for three to five days.It is only natural for me to beat my son, and the children I educate are rarely rebellious. Do you think it is strange?
"It's just like doing that thing. It's like doing that. It's full of energy, then it declines, and it's exhausted three times. The first time you measure too much, the third time it's gone." Cheng Huaimo pointed at the silk cloth and smiled, "This kneading silk cloth is like eating. It’s like tiger and wolf medicine, hey, just rub it hard for a while! Do you think it’s weird?”

"If Zuo Gong Jiuquan knows that his words have been ruined by you like this, will he crawl out angrily to find fault with you? If Uncle Cheng knows that you have misused classics like this, will he beat you again?" Jin Yu pointed Cheng Huaimo scolded with a smile.

"Hey." Cheng Huaimo smiled at Jinyu, turned to look at Qin Huaiyu and changed his face: "Smiling ass, I don't have any insight, I didn't hear my brother just asked why you use cotton cloth?"

Qin Huaiyu haughtily snorted at Cheng Huaimo before explaining to Jin Yu: "Since my younger brother took over the cotton job, I have carefully compared the difference between the two kinds of cloth. The silk cloth is not fake, but it is not labor-intensive. It is a little bigger. If you rub it for a long time, it is very easy to wrinkle, hang and fall; in addition, the stretchability is poor, and it is easy to become brittle after being exposed to the sun. If it is used outdoors for a long time according to the elder brother, I am afraid that it will break directly after a long time; and then there is the problem of preservation, it is wet. Moldy, ventilation attracts insects, anyway, it is difficult to take care of. Cotton cloth is much better than silk cloth in these aspects."

"Then why don't you say that cotton is more breathable than silk?" Cheng Huaimo refused to accept, and scoffed at Qin Huaiyu's statement.

"Breathability is indeed a problem, but it's not impossible." Qin Huaiyu did not deny the defect of the cotton cloth, and pointed to the paper next to him, "Isn't it enough to put a piece of paper between the two layers of cotton cloth?"

Ok?Ok?Jin Yu was stunned by Qin Huaiyu's words, why is this structure so familiar?Have you seen it somewhere?
"Tch, how much does the third floor weigh? What a fart!" Cheng Huaimo dismissed this.

"Forget it, what can be the result of arguing?" Jin Yu acted as a peacemaker for a while, "Huaimo, you count as silk, Huaiyu counts as two layers of cotton cloth sandwiched by a layer of paper."

A complete piece of silk cloth has the function of currency. The imperial court has express regulations on the size and weight of silk cloth: a piece of silk is four feet long, one foot eight inches wide, and weighs 12 taels (9.6 meters long, 0.43 meters wide, and weighs 380g. ), different dynasties, the currency value will fluctuate, and now a horse can be worth 500 yuan.Considering the loss of the interface, in conversion, a square of silk is about 95g, which is worth 125 Wen.

The price of silk cloth is four times that of silk, and its weight is twice that of silk. After conversion, a square silk cloth is about 190g, worth 500 Wen.

The weight and price of cotton cloth are comparable to that of silk cloth. A square of paper is 15g, and it looks like a few pennies.

Insert the formula, and the data will come out quickly. Those with a radius that is too small are excluded directly. Those with a radius of 7 meters can barely be seen. The calculation results with a radius of 9 meters are quite satisfactory. The weight of silk and cotton is not much different. But the silk cloth used needs 500 guan!If cotton cloth is used, the cost is only half of that of silk cloth!
"This...can really take people flying?" The two friends were stunned. The data was accurately displayed in front of them. The buoyancy with a radius of 9 meters is 350kg!It weighs five adults!

"Can you still lie to you? But this is only theoretical data. In actual operation, problems such as the weight gain of the seam and insufficient heat value should be considered. As the sphere increases, the problem of expansion and tear resistance should also be considered, such as How to sew more firmly? Do you need to use hemp rope to fix the outside? This is not something that can be easily done by sewing eight petals lightly. There will be many practical problems. Big." Jin Yu silently calculated the buoyancy, a little disappointed, "Add a basket below, add a few kilograms of heat source, add a person, add some seeds, I'm afraid it won't be able to fly very high."

"Why do you need a heating source? How high do you want the balloon to fly?" Qin Huaiyu's eyes lit up, and he was a little excited. The cost of the plan he proposed was much lower than that of Cheng Huaimo. He ignored Cheng Huaimo who was traveling alone, and asked.

"I originally planned to do a high-altitude breeding. Why do they have to be [-] meters high? You can't fly up without a heat source. As far as the current combustion value of the heat source is added, it is free. Judging from this data, there is little hope. "Jin Yu threw down his pen and slumped on a chair.If you want to reach [-] meters, the radius must be much larger!The bigger the risk, the higher the risk. People with complete parts go up, and they may turn into mud when they come down. Even if they use death row prisoners, even if they can land safely, how can the Agricultural College build a balloon with this little funding?Do all the people in the hospital drink northwest wind?Even if Li Erye increases the budget, how to solve the heat source?The technology of this year is really not enough to make a sealed gas tank, nor can it compress combustible gas to a liquid state!
As for the use of kerosene, hehe, stop making trouble, let alone that it cannot be refined, even if the kerosene can be refined, the fire will be extinguished as soon as it is blown. It is also a way to increase the amount of combustion by increasing the contact area, but it can really get into the airbag Very little heat.Even if you make a seamless pipe with a bird's beak, even if you make a watering can, even if you add a rubber gasket to seal it, even if you can use the power of bragging to pressurize the watering can, even if you turn the knob and spray oil automatically, but the spray comes out Can the kerosene that looks like a goddess scattered flowers burn fully without dripping?After falling on a human body...is it counted as a living person ascending to heaven and cremated?

"Okay, let's take it as a fun little experiment." Jin Yu rubbed his face and sat up, "There are not so many shortcuts to take in breeding, they are all dead ends, so let's take it step by step honestly."

"Don't play for fun?" Cheng Huaimo raised his buttocks, looking forward to visiting the sky.

"Yes, yes, I don't dare to think about 100 meters. Can 200 meters and [-] meters work? We don't need a heat source, just like the experiment just now, heat it up below, and when the airbag is hot, tie the mouth tightly and hang it Just fly the basket." Qin Huaiyu was also very enthusiastic, flying to the sky, no one has ever flown up there before!
Ok?Ok!Qin Huaiyu's words reminded Jinyu why he was familiar with it!Isn't this the hot air balloon introduced in the coloring page version of "One Hundred Thousand Whys for Primary School Students"?This is how the first manned flight was played!
"Yes, yes, this hot air balloon can be used repeatedly. Let's tie a rope underneath, which can not only ensure safety, but also take it back. There is a paid ride, ten yuan for a ride, and a quarter of an hour for a ride. It's nothing more than a little firewood. There are There are a lot of money, and the cost can be recovered in a few days!" Cheng Huaimo nodded fiercely, this business can be done!

"Yes, yes, we can still write large characters on it, and when we do that advertisement, the whole city of Chang'an can see it, and if we lose fifty pens, we don't need to talk about it!" Qin Huaiyu continued, the more he thought about it, the more excited he became. , the money is coming soon!

"The masses organize spontaneously, and the palace is not allowed to pay, which makes sense." Jin Yu nodded thinking, an emperor who can be scolded for a long time by the officials for playing tricks, you expect him to spend thousands of pennies for a bet Make balloons?The queen who can even cut her skirt short to save money, do you expect her to pay for it?What are you doing?

"That's right, that's the reason!" Cheng and Qin said in unison.

"But have you ever thought about it? Flying 200 meters, you can see the layout of the palace clearly." Jin Yu spread his hands, this hurdle couldn't be avoided.

If someone can successfully convince Li Erye that hot air balloons are really possible, low-altitude hot air balloons are relatively safe, and there is no need to consider the temperature after flying. Mount Tai is more than 1500 meters above sea level, and it is not difficult to blow cold wind on the top of the mountain for two hours every three or nine days. Won't let snow freeze on your face.Don't worry about the explosion, it's not filled with hydrogen!As long as the hot air blows the yarn, it will explode when it is heated on the ground!

　I really don't like writing books without brains and misleading book friends!What if a book friend travels through time, follows the plot in the book, and gets his head chopped off? (manual funny face)

　　
　
(End of this chapter)