RBCT Chapter 552 What Are You Talking About?
Chapter 552 What Are You Talking About?
At eight o'clock on Monday night, Badain Jaran Desert UAV Base.
The sky was full of wind and sand, and the sand was as white as snow. Song He and Xie Yuanxun came out of the airport and walked towards the dormitory.
The sand near the base was all white. When the plane landed, the ground was covered with frost. Song He thought he had arrived at a snowfield. It's dark now, which looks fine. But when it gets brighter, it will be completely white. If you look at it for too long, you might get snow blind. I met some soldiers passing by in a hurry on the road. They all wore sunglasses, like the twin brothers of the teacher with black glasses.
The buildings in the base look very similar to the buildings in the temporary airport. To be precise, they are exactly the same. A group of buildings are like copied and pasted. Only the building numbers are different from top to bottom, and the building numbers are not in order.
"Why is this building number so confusing?" Song He walked around, looking for a new dormitory building. "Each building is built exactly the same! It's like a ghost building a wall! Does the army only build one kind of building?"
"Deliberately make the buildings the same, like a protective color, so outsiders don't know which building is important." Xie Yuanxun's opinion hit the nail on the head, "If a stupid spy sneaks in, he will be trapped in the maze of the building, like a headless fly. change."
Song He suddenly realized that he was indeed the disciple brought out by the black glasses, and his thinking was indeed more sensitive.
Finally, they found Dormitory Building No. 9, and the two hurriedly climbed up the stairs and moved into the new dormitory.
The new dormitory is exactly the same as the dormitory at the temporary airport two days ago, but the ground is no longer covered with sand, and it is even spotless. The mattresses, sheets and quilts are all brand new, and there is a smell of sunshine, which has obviously been specially dried.
Song He stood on the balcony and looked far into the distance. The sand around the base was white and turned yellow in the distance. The sand dunes undulated in a disorderly manner. There were also small lakes lying in the sand, creating a small oasis in the surrounding area.
"That kind of small lake is called Haizi." Xie Yuanxun put the toothbrush basin on the windowsill. "It is said that some Haizi can run and move back and forth in the desert, killing many pedestrians who use Haizi as the coordinate. The place name Badain Jaran is A man named Badan discovered sixty Haizi here, and Jilin means sixty in Mongolian."
"Because the sand dunes flow?" Song He guessed, "When the wind blows, the sand moves back and forth, squeezing Haizi around. This damn place is used to test reconnaissance drones. It's very difficult! The landform is changing all the time. The requirements for drones are too harsh!”
"In order to sell to the Middle East." Xie Yuanxun said, "The Middle East is a super powerhouse. Every year they come to buy several ships of weapons at high prices. If we really make a new sand-proof drone, maybe the military industry companies can provide Let’s divide the money, and the amount will never be small!”
"Come on, make money." Song He opened the laptop and put it on the table.
The two of them each took a piece of paper, sat in front of the computer, and began to discuss the modification of the drone.
The transformation process can be summed up in four words: hammer, hammer, hammer!
First draw a drone on the drawing software, make modifications according to your feelings, and then do some calculations and gradually try to find the optimal structure.
It's a bit like the evolution process of nature. First, a kind of creature is pinched, and then it gradually mutates, and finally its appearance changes drastically and it evolves into a brand new species!
The most troublesome part of the calculation process is the aerodynamic shell. The drone flies in various postures in the air. To ensure flexible steering, the wind resistance must be small enough. The howling wind blowing through the drone will form various complex turbulences, ever-changing, and the two People are so excited that they want to die.
"I think the angle of attack of the small wing here needs to be expanded a bit." Xie Yuanxun said, pointing at the screen.
"It's not a little bigger." Song He shook his head, "The current 5 degrees is the most stable, the pressure distribution curve is smooth, and the streamlines are well adhered. If you are a little bigger, you will have problems."
"How is that possible? Men should not be as timid as rats!"
Xie Yuanxun was not convinced, so he picked up his pen and started calculating. Just halfway through writing, Song He pulled over the computer keyboard and started typing, presenting the whole process on a calculator.
"You see, after enlargement, a short separation bubble will be formed on the upper surface of the airfoil, the flow separation point will move forward, and the transition position will be delayed." Song He smiled and said, "I get one point!"
Xie Yuanxun looked at the calculation process, looking slightly embarrassed, and then quickly continued to observe the shape of the unmanned aerial vehicle.
"You can try changing it here." Xie Yuanxun picked a spot with the mouse, "How about making it thicker?"
Song He pursed his lips for a moment, "It can't be thickened a little, I feel it still needs to be thinned."
"Thinning?" Xie Yuanxun was confused, "Why do I feel like I can't thin it a little?"
The two of them looked at each other, and at the same time they were calculating quickly and writing as hard as they could compete.
"Sure enough, it needs to be thicker!" Xie Yuanxun beamed, "I get a point!"
"Huh? Why did I count thinning?" Song He was confused.
Xie Yuanxun was full of confidence and pushed the writing paper in his hand to the side, like a top student copying homework for a low-achieving student.
Song He stared at him for a moment and said, "You miscalculated in the sixth step. The separation point on the upper surface of the airfoil moved forward from 4%c to 3%c, and 15%c reattached to the wall. The length of the laminar separation bubble was 5%c to 30%c is shortened to 3%c to 12%c. The lift coefficient of the airfoil under small turbulence is higher than that at high turbulence, and the higher velocity pulsation of the flow is injected into the boundary layer..."
The proud look on Xie Yuanxun's face faded, and he was embarrassed to say nothing.
"I got another point." Song He smiled lightly.
Xie Yuanxun was slightly sullen and stared at the computer screen unconvinced, looking for a position where he could regain his position.
The two of them were busy, debating from time to time, and most of the time they were busy calculating and staring at the computer. Time passed very quickly.
Dinner had already been eaten on the plane to the base, so the two of them were unaware of the midnight hour tonight and were busy until two o'clock.
"I think it's almost done!" Xie Yuanxun rubbed his temples and yawned wildly, "Take a look and see if there's no problem. Let's order a batch of prototypes from Master Ye. I'll go out and try the effect during the day. I can't stand it anymore, so I'll go to bed first. "
"Hey, wait a minute." Song He took out a blank piece of writing paper and said, "The turbulence paper you recommended to me last night was pretty good. Write more and I'll study it at night."
"I can't write a little bit!" Xie Yuanxun climbed onto the bed and said speechlessly, "Today we changed a total of 24 small details. You scored 20 points and I scored 4 points. I can also calculate the small turbulence by hand. You can see it at a glance. It should be You write study materials for me!”
After saying that, Xie Yuanxun put on his blindfold angrily, covered his head and fell asleep.
Song He shrugged helplessly and continued to stare at the design drawings.
I revised and revised it for another hour, until three o'clock in the morning, and it was almost done.
The new appearance of the drone is quite cool, even a little weird. The internal structure is more complex, but the outside is simpler and smoother. It looks completely unrelated to the original model.
Although it is not perfect yet, it should be much better than the drones currently used by Honeycomb. We will first make a batch of prototypes to test the effect.
He took out his mobile phone and found Master Ye, the drone.
Song He sent the design drawings and the files were received immediately.
"You're still up so late?" Song He was surprised.
"Night shift." Master Ye replied, "Wait a minute...what the hell are you talking about?"