Vol 10 Chapter 3422: Zhao Yu's whimsy

Of course, Qin Luo did not sit idle while Marco was preparing for the "stealing of secrets" plan.
After two full days of hard work, a brand-new design drawing was placed before Qin Luo's eyes.
The main structure is prescribed by Qin Luo, and it is still round!
But in the center of the parachute, a hole was added, and ear wing devices were added on both sides.
"Zhao Yu, what's the matter with the hole in the middle?" Qin Luo frowned slightly and looked at Zhao Yu with some confusion.
To be honest, in Qin Luo's impression, none of the parachutes had holes.
Although Qin Luo is not very proficient in aerodynamics, he also has a basic understanding that once the parachute has holes, it will accelerate the flow of air and reduce air resistance.
He really didn't understand what Zhao Yu was thinking.
Didn't sleep for two days, just came up with such a thing?
One thing to say, Qin Luo felt that after two days of nights, they had all stayed on the dog.
"Professor Qin, I call this hole an orifice. The size of the orifice is determined according to needs. Generally, the larger the umbrella area, the larger the diameter of the orifice. His role is also very simple. , Is to make the air form a passage from bottom to top when the umbrella is falling, so that the umbrella remains stable during the descending process." Zhao Yu said with a smile.
The circular umbrella is very unstable, and the influence of hand air is great.
In order to solve this problem, Zhao Yu consulted countless materials, and finally he found a solution.
Make a small hole in the center of the parachute!
Stroke path to improve the stability of the parachute!
stable?
Qin Luo's mouth twitched. At this moment, he didn't know what to say!
Yes, he first proposed stability to ensure the safety of landing and the lives of astronauts as much as possible.
However, he never said that he made a hole in a parachute!
Stability is important, but the resistance of the parachute is also important.
For the sake of stability, give up resistance, this is a typical waste of food due to swallowing!
"Huh~"
Qin Luo let out a long sigh, forcibly raised his spirit and looked at Zhao Yu!
"Zhao Yu, let me ask you, what is the most important function of a parachute?" Qin Luo gritted his teeth.
"Slow down the landing speed!" Zhao Yu said without thinking.
"Then open a hole in the parachute now, although it can form a passage to make the umbrella body more stable, but the effect of slowing down is greatly reduced!"
"Have you thought about this?" Qin Luo gritted his teeth and said.
However, at the moment Qin Luo's voice just fell, Zhao Yu shook his head: "Professor Qin, in fact, opening a hole does not have much effect on the deceleration effect."
Qin Luo:? ? ?
did not affect?
I read little, don't lie to me.
Zhao Yu's words directly stunned Qin Luo.
This simply refreshed his perception.
"Zhao Yu, tell me more carefully, what is going on?" Qin Luo asked.
He wanted to hear what kind of explanation Zhao Yu would make.
It was the first time Qin Luo heard of this theory that a hole in the parachute had no effect on the landing speed.
The corner of Zhao Yu's mouth raised slightly, and a faint smile appeared on his face: "Professor Qin, you must know that the area is proportional to the resistance."
"As long as the area of ​​the parachute is large enough and a hole is made, it has no effect on speed."
Qin Luo: "!@#￥%……"