Jinling is beautiful, but it is not worthy of Song Che's nostalgia. On the morning of August 16th, Song Che chartered a passenger ship and returned to Hangzhou alone.
Tang Hulu and other Tibetan merchants still stayed in Jinling, probably because they wanted to find more opportunities to make a fortune at the feet of the emperor.
On the afternoon of August 18, the passenger ship arrived in Hangzhou. In the days that followed, everything became normal. Women take care of everything at home and outside business in an orderly manner.
Coupled with this autumn's bumper harvest and the inflow of a large amount of foreign capital, the financial deficit originally caused by the war in the north has also been made up. Now that the government has money, Song Che no longer has to dig out his pocket to provide blood transfusions to them. Furthermore, many refugees who have fled from the north have He volunteered to join the army, and his desire to drive out the Tartars and restore the Central Plains was very urgent. Now that he had money and enough people, he just had to wait for horses to be sent from the northwest and sufficient weapons and armaments to be built before he could march northward.
Song Che was a little troubled - the fierce fire oil refined from Shedao was very successful. One can can burn down a house, but the problem was that there were firearms but no launching vehicles. Usually, the military's use of fierce fire oil, They are all trebuchets. They can be filled with cans or oil is applied to the stones, and then thrown out after being lit. They can kill at a certain distance. However, this combat method is too clumsy. The trebuchet must be pushed very close to have a chance to be effective. But if If you push it too close, if the enemy uses a strong bow and crossbow, and then mounts a rocket, it will be easy to hit him. If the fire oil hits your own camp,
If you "explode", you'll be in big trouble. Since Song Che developed the artillery, the trebuchet firing method has almost been eliminated by the army. However, the fierce fire oil is a liquid and cannot be pushed out with gunpowder like a solid artillery shell. How to use the fierce fire oil as a killer weapon? On the battlefield, this is what Song Che thinks about day and night.
"Alas..." On this day, Song Che sat in the study as usual, holding his chin and looking out the window, thinking hard.
"Huh..." The study door was pushed open.
"Sir, it's windy today, and the ladies are calling you to fly a kite!" Coco held the kite in her arms and rushed into the study excitedly.
Song Che shook his head. How could he still think about flying a kite? Why? Kite? A kite flying into the sky!
When it comes to throwing fluid bombs like fierce fire oil, the best way to throw them is
"Airdrop"? However, how to send bombs to the sky and then accurately affect the battlefield?
Is it possible that I can build an airplane? He couldn't live without this thing. He shook his head to deny the flash of inspiration, and sighed softly: "You can go and play by yourselves, I'm really not in the mood..." At this time, Lin Yue rushed into the study, pulled him off the chair, and dragged him to the toilet. Walking out: "Oh, you shut yourself in the study all day, why don't you go out and stretch your muscles?"
"Yes, yes, we have prepared a sky lantern tonight. The wind is so strong today, it will definitely fly up into the clouds." Coco said.
"Sky lantern!" Song Che's spiritual light that had just been broken was restored again. Sky lantern? Kongming lantern? hot air balloon!
If you can't build a plane, you can try a hot air balloon!
"Coco! Go and bring the sky lantern for me to see!"
"Ah? But, sir, the sky lanterns need to be lit at night to look good, right?"
"Just go and get it, I'll find it of great use!" Song Che urged. Coco didn't ask any more questions and quickly brought out all kinds of sky lanterns.
The structure of the sky lantern is divided into two parts: the main body and the bracket. The main body is mostly made of bamboo strips. The lampshade is made of tissue paper or light oil paper. The fuel is mostly burned animal grease. The burning flame increases the temperature of the surrounding air. The density decreases and rises, thus expelling the original air in the lamp, making its own gravity smaller, and holding it up with the buoyancy of air.
A hot air balloon can be viewed as
"Giant sky lanterns" usually use sandbags and fuel to control their ascent and descent. As for direction and speed, more complex processes are required, such as propellers, spoilers, etc. In ancient battles, the requirements are not too high, as long as It can transport the fierce fire oil to the sky and then throw it to the enemy with the wind.
"Haha! Coco, you are such a clever little kid!" Song Che laughed, got on his bicycle, and rushed to Yunshuifang.
Coco pouted: "I'm going to be sixteen soon, I'm no longer a clever kid..."...Although the principle of a hot air balloon is the same as that of a sky lantern, the material and structure are different.
The main material of the sky lantern is tissue paper. As the height increases, it will be easily blown if it encounters strong airflow. Therefore, if you want to make a hot air balloon, you must first find a tougher and lighter material. At this trade fair, Yunshuifang collected many special cloths from Tibetan merchants, and they might be able to find the one they like.
"Quick, quick, quick, I need a kind of cloth now. The texture needs to be light, not too breathable, and the toughness must be high!" Song Che rushed into Yunshuifang and shouted.
The shop assistants did not dare to neglect the things that the big boss wanted. Soon, Qinruo came over with three pieces of fabric. She introduced them one by one: "This one is 'rainproof cloth', this one is 'light cloth', and this one is 'light cloth'." It's 'Ziyunsha'. They are all new products introduced in the market. Can you see if there is anything that suits your needs?" Song Che unfolded the three fabrics in order and checked them. The rainproof fabric has good toughness, but is too heavy. The air permeability is too low; the texture and breathability of light cloth are satisfactory, but the toughness is too poor; the texture and toughness of Ziyun gauze are good, but the breathability is too high... Song Che shook his head and asked: "Can I use the rainproof cloth as a waterproof cloth?" Combine the toughness of light cloth, the breathability of light cloth, and the texture of Ziyun yarn to weave a new kind of cloth?" Qin Ruo curled her lips,
"The rainproof cloth is made of fine cotton sateen, the light cloth is made of fine linen, and the purple cloud gauze is made of silk. The craftsmanship and materials of these three fabrics are different. It seems that it is not easy to combine them, huh. ...It's not easy." Song Che smiled and said: "That's wrong, nothing is difficult in the world as long as there are people who are willing to do it. We have a lot of talents in our workshop, so there will definitely be a way to make it." Qin Ruo said, "I'm not good at textile technology. , but you can go to Suzhou to find Lu Gu, she might have a way..." Song Che said: "Why don't you go to Suzhou to find her? Directly invite all the experienced weaver girls from the head office to come over. I want this soon. Approving cloth, the faster the better!”
"What do you want this kind of cloth for? This kind of weird cloth is not suitable for summer clothes, winter clothes, and private homes. Even if it is woven, it will not sell well on the market." Qin Ruo None of the store clerks could understand it.
Song Che was full of enthusiasm and interest. He pointed to the sky and said, "I want it, to heaven!"
"Ah? Big...big boss, don't let your imagination run wild!"
"Idiot, when I talk about heaven, I mean flying into the sky, riding on the clouds and riding the wind, competing with birds for freedom!"...
