Is there any problem
Everyone clasped their heads and looked at the Peng aircraft carefully, with blank faces on their faces.
Some people feel that there is something wrong somewhere, but they cannot explain it. They can only attribute it to lack of spirituality.
Li Zhen saw that they couldn't find any problems, so he simply said: "There is something wrong with the model. The area of the wings is too large."
Everyone opened their mouths but stopped talking.
Team leader Liu Hongyun laughed dryly: "Master Li, this is an improved model. The one we designed before was later overturned."
Li Zhen asked: "Why was it overthrown?"
"Because we believe that long-distance flight stability is the first priority. The previous wing coverage area was too small and the load-bearing capacity was insufficient, so it was not suitable for long-distance flight."
Li Zhen laughed loudly: "Who told you that the bearing capacity is insufficient? Do you know that the wings are unstable if they are large?"
"Why"?"
"Because there are too many surprises. If the wings are too big, the speed will slow down. You give up speed to increase stability. But in fact, at high altitude, speed is the first priority. As long as the speed is provided, the lift will increase. It will continue to increase. As the wings get bigger, the speed will slow down and the thrust will slow down. This is a thrust aircraft, and everything depends on the engine. When the thrust becomes smaller, the lift will decrease. On the contrary, it will increase the load-bearing capacity."
Xun Jiayuan frowned and said, "That's not true. You see, the wings have become bigger. Even if the engine in the air stalls, it can still glide and land smoothly."
Li Zhen smiled and said: "Even if the size of the previous wing is smaller, it can still glide and land after the engine is turned off. Don't forget that you are a biplane. Increasing the size of the wings will inevitably increase the weight. If the wings If it becomes heavier, the lift will be lost.”
Everyone was speechless. If you think about it carefully, it seems to make sense.
Liu Hongyun asked again: "Then Master Li thinks we need to reduce the size of our wings?"
"That's right. This size must be reduced. There is also a very critical point. Your aircraft model is wrong. This model is not streamlined. Instead, it looks like a big cylinder. It looks like a fat goose when it flies into the sky. Stupid, stupid, stupid.”
"But there are people sitting inside."
"If you have people inside, you can't sacrifice the streamlined shape. Streamlined is very important. With a few more processes, the aircraft model should not become such a stupid shape. It can become streamlined without changing the volume."
Xun Jiayuan was shocked: "How can we change it without sacrificing the size?"
Li Zhen gestured: "Look, let this place have more edges and corners, and let some parts of the cylindrical fuselage be recessed. The recess does not need to be large, and it will not affect the people's riding at all. Doesn't it become streamlined? No need to do so. To modify the frame, where the frame is facing, we just change the shape of the fuselage, and it can become streamlined easily."
Xun Jiayuan slapped his thigh: "That's right. I always feel that it has no spirituality, but I can't explain why. It's because it unknowingly sacrificed the streamlined body."
Li Zhen added: "Also, the wings need to be changed. The shape of your wings is like a ruler. Like a machete. This actually increases the wind resistance. The wings can also be changed into streamlined shapes."
"How to streamline the wings?"
"Your current wings are like a machete, cutting straight forward, and the angle between the wings and the fuselage is also 90 degrees vertical, which is unacceptable. Adjust the angle of attack of the wings so that the roots of the wings and The fuselage has an obtuse angle at the front and an acute angle at the rear. In this way, it becomes a dagger, stabbing forward and cutting diagonally. A machete cuts forward sideways for efficiency, or a dagger cuts forward diagonally for efficiency. You guys? What do you think?"
After Li Zhen finished speaking, everyone in the design team was excited.
,
"That's right. The wings don't actually need to be in such a straight shape."
"Our wings are all a regular rectangle. But this is wrong."
"The wings can be in the shape of a triangle, getting wider closer to the fuselage and narrower towards the tip of the wing. Isn't this streamlined?"
"I'm sure that if it is modified like this, the speed of the aircraft can be increased by more than 15% with the same power."
"Fifteen percent is a small amount. I estimate it can be 20 percent."
"The case was finally solved. I said I felt something was wrong with this model, but I couldn't figure out what was wrong. So that's what happened."
“…”
Seeing the excitement of the people in the design team, Li Zhen actually knew it.
It's no wonder they didn't think of this. These things have been learned before and they can be figured out with just a turn of the head.
They are obsessed with the authorities. I was designing every day, and I got stuck without even realizing it. But as soon as it is brought up at this time, you will wake up immediately.
As long as you tell them what went wrong, they will be able to see clearly what the problem is and how to improve it.
Liu Jinghong also said that it made sense. During this period, he also felt that the design and development had encountered a bottleneck, and he was actually unsure about Pengshi. I'm even more afraid of delaying my business. But today the problem is finally solved, which is worth celebrating.
Xun Jiayuan took a peek at Li Zhen and was really impressed.
Alas, how come this young man is so talented? He is proficient in every field, and there is basically nothing he cannot do. This was the number one scholar in Kyushu under his rule, and his glory was already world-famous at that time. But who could have imagined at that time that becoming the number one pick was not the end of his career, but the beginning of his glory.
sharp.
After Li Zhen finished asking the question, he found Xun Jiayuan again and said with a smile, "Is Mr. Xun still comfortable staying at the Kyushu Academy of Sciences?"
Xun Jiayuan glanced at Li Zhen suspiciously and said a little sheepishly: "Haha, what's so uncomfortable about it? I like it here, the scientific atmosphere is very strong, and I also like doing my current job."
Li Zhen said: "I was too busy before, and I never heard about your current situation. I hope Haihan. If you have any needs or requests, just tell me."
"What are you talking about? I am very satisfied here. There are no requirements. The only requirement is that I hope I can be here forever. I am willing to be an ordinary R&D staff. As long as I work in the Aviation Academy. "
"Mr. Xun is almost seventy this year, right?"
"Seventy-three."
"It's time to retire at this age. You're still on the front line. Are you tired?"
Xun Jiayuan blew his beard and stared: "What's so tiring about that? You must never let me retire. If I really want to be free, I will be anxious every day. My life now is very satisfying, I am very satisfied, money, power and beautiful women are all Floating clouds. It is not easy for a person to find something that he really likes in his life, and it is even more rare to be able to immerse himself in his hobby for his whole life."
When Li Zhen heard this, he didn't know what he thought of, and said with a vague look in his eyes: "Yes."
(End of chapter)