Chapter 1699
The two seem to be nodded.
Seeing this, Zhang Feng continued: "However, this coarse cloth does not work very well. It is too easy to breathe. Next time you can try a new material."
"Honored Teacher, What materials should be used?"
Ma Zhou subconsciously asked.
hearing this, Zhang Feng paused.
The hot air balloons of later generations are basically made of reinforced nylon or polyester. Both of these materials are relatively light and strong. The most important thing is that they are not breathable, but these things are not yet available.
Although coarse cloth can be used temporarily, its air permeability is too serious and it must be replaced with another material.
But what changed he was stumped.
Ma Zhou and Hao Chujun stood on the side and did not dare to say anything, for fear of interrupting Honored Teacher's thoughts.
About a quarter of an hour later, Zhang Feng mouth exposes a smile, slowly said: "Change to silk."
"Silk?"
Ma Zhou He looked at each other with Hao Chujun and made a sound almost at the same time.
Because they all know that silk is a very expensive thing in Great Tang, and generally only Great Family people have money to use. Now Honored Teacher says to use silk, where do you get it?
Seeing the dilemma of the two, Zhang Feng laughed: "Don’t worry, I will get this for you."
In fact, he wanted to change one for a long time. It’s a kind of material, but I just said it when I thought of silk.
Silk has good moisture absorption, UV resistance, and heat resistance. With these properties maintained, hot air balloons can operate normally on hot or rainy days.
Although it is a bit expensive, it is still worth a try. After all, research is to find a right method among thousands of wrong methods.
See what Zhang Feng said, the two are no longer good at talking, Qi Qi nodded: "Yes, Honored Teacher."
"Not only these, you can also use other experimental equipment. Try to change."
Zhang Feng glanced at the two and said.
Although the hot air balloon has taken off, it still has to rely on wind power. It is necessary to continuously experiment with other materials and update it.
"Yes, Honored Teacher, students understand."
The two replied.
Zhang Feng is nodded satisfied, he is still very satisfied with these two dísciples, and the comprehension is also good, I believe he will not live up to his expectations.
"Since you all understand, then I will go first. If you have any questions, come to the Academy to find me."
He glanced at the two of them, very pleased, and finished. He walked towards the door of the laboratory.
"Dísciple presents Honored Teacher."
The two said in unison.
"Don't give it away, I can't find the way."
Zhang Feng waved his hand and didn't care.
Ma Zhou and Hao Chujun froze for a moment. They knew that Honored Teacher was not a polite Confucian scholar, so they didn't care about it and stood in the same place as a respectful gift.
Zhang Feng faintly smiled, and alone walked out the door. It seems that this comforting had a good effect, and the two of them also looked humbly and taught.
Along the way, he has been thinking about silk. Now Great Tang’s silk is more expensive than gold, and it’s a bit hard to handle, but coarse cloth is really not a long-term solution. It is easy to leak. It seems that you have to find Cheng Chumo these guys helped.
I was speechless all the way, and I returned to the Academy in less than a moment. It was the end of get out of class at this time. The Academy was full of happy laughter and cheerful voices. The basketball court kept shouting loudly, leisurely. My classmates strolled in the Academy, and when they saw Zhang Feng, they came forward to say hello.
"Hello Dean."
"Hello."
Zhang Feng will laugh and continue to walk to the residence.
But when he passed the basketball court, a sigh of resentment attracted his attention.
I saw a group of people on the basketball court, wearing short sleeves, as if talking about something.
Curiosity induced Zhang Feng to walk over. He looked towards the people sitting around and couldn’t help asking: "What are you all sitting here doing?"
hearing this, Everyone turned their heads and saw Zhang Feng. They quickly stood up and said respectfully: "Good dean."
Zhang Feng nodded, continue to ask: "What are you talking about here? "
Everyone bowed their heads, you look at me, I look at you, it seems like they can’t speak.
Zhang Feng is a bit uncomfortable, and scans the acquaintances in the same crowd: "Yunping, what is going on? Don't be like a lady."
"This..."
Yun Ping hesitated to look at the crowd, and finally his heart was overwhelmed, and said slowly: "Dean, it's like this, we will play with another Academy team after class. Nacheng thought that he lost..."
Here, he was paused and his face was blushing.
"What happened later? Keep talking."
Zhang Feng hurriedly urged. When he heard the enthusiasm, the youngster didn't say anything. I really doubted whether this guy deliberately hanged himself. I have an appetite, and I have to clean up in the future.
"Later, we all dissatisfied and agreed to wait a while before we fight. Now we are here to discuss tactics."
Yunping has a bit of resentment, while speaking, he still looks back at his partner. , It seems to be saying that it was all you killed, now it is caught by the dean.
Like a little quail, he hung his head tightly, waiting for Zhang Feng's punishment. The people behind him were the same, bowing their heads tightly, as if they were afraid of Zhang Feng's punishment.