Chapter 11 Canard Layout...Master!
Chapter 11 Canard Layout...Master!
The group left the test site and arrived at a two-story building not far away.
The three watched as Lin Dong took out a key and opened the door to the small building. Inside, they saw a full bookshelf, several sets of experimental testing and processing equipment, and a standard small aircraft test bench.
Cai Wei and Zhang Yue hadn't reacted yet, but Wang Rui's eyes widened as he looked at Lin Dong incredulously: "This is your personal laboratory?"
"It's my dad's lab. I can just come in to learn and play around. This is an outer area, so the security isn't that strict."
"oh."
Wang Rui nodded, looking somewhat thoughtful.
"This is it."
Lin Dong ignored Wang Rui's reaction, turned on his computer, searched for several academic papers, printed them out, and handed them to Wang Rui.
"Go back and thoroughly understand these papers, and you'll understand how to design the air intake from the combustion chamber to the turbine. If you don't understand anything, feel free to ask me."
"..."
Wang Rui looked at Lin Dong, who was so precocious and said he could ask him anything he didn't understand, and felt his back teeth twitch a little, but in the end he didn't say anything and took the paper to read on the spot.
"Lin Dong... oh no, Dong Shen!"
When Zhang Yue and Cai Wei saw this casual act of pulling out documents, they immediately realized they had encountered a true genius.
Although this expert is still a primary school student.
But the sea of knowledge is boundless, and those who have attained enlightenment can be our teachers.
As long as you can take them flying, let alone a primary school student, even an infant can learn to make formula and change diapers.
Thinking of this, the two exchanged a glance and quickly approached, "Dong Shen, what do we need to do now? Have you finished designing the blueprints for your model airplane?"
"The blueprints aren't finished yet, but there's a plan. Please wait for half an hour."
Having finally found a few free cattle and horses, Lin Dong didn't waste any time.
Open the design software, move the mouse and keyboard rapidly, and without needing a draft, the screen will display a dazzling array of arcs, shapes, and straight lines.
Soon, these lines and shapes formed a general diagram of the fuselage structure.
This is a fuselage with a high aspect ratio and a narrow body layout.
The front of the camera resembles an elongated teardrop, with a streamlined design from front to back, without any unnecessary protrusions.
The main wing is a typical large sweep wing design, with a sweep angle of nearly 60 degrees and a slightly upturned wingtip, forming a smooth arc.
However, in front of the main wing, there is another set of forward-mounted wings, which form a clear misalignment angle with the main wing.
"Canard configuration..."
When Cai Wei saw the fuselage structure drawn by Lin Dong, his pupils suddenly contracted, and he couldn't help but exclaim in surprise.
He studied aircraft design, specializing in aerodynamic layout and avionics systems, and was familiar with the layout of swept wings with canards.
The advantage of this layout is that it can ensure sufficient pitch control at high speeds while reducing trim drag, which can greatly enhance the aircraft's air combat capability.
The downside is that the aerodynamic design is very complex, and the requirements for the flight control system are extremely high.
Because of the complex aerodynamic interference between the canard and the main wing, even a slight defect in the aerodynamic layout or a slightly inferior performance of the flight control system would render it not an aircraft, but an aerial spiral.
With such stringent technical requirements, apart from a few outstanding graduate or doctoral teams, other students at Northwestern Polytechnical University dare not even touch the canard layout when making model airplanes.
But now, a primary school student is tinkering with a canard-wing fuselage design right in front of him.
"Eastern God!"
Cai Wei swallowed hard and asked, "Without wind tunnel testing, can this aerodynamic layout be completed? Can the flight control algorithm and servos meet the requirements?"
"What can't a subsonic dogfighting model aircraft with Mach 0.7 satisfy?" Lin Dong replied calmly.
Aircraft design and manufacturing is a systematic project. The difficulty of designing a component is not only about that component, but also about the overall design and integration.
The same canard configuration.
The technical difficulty of this small model airplane is vastly different from that of a real fighter jet.
Low speed, subsonic, transonic, and supersonic speeds present different levels of technical challenges for aircraft.
After more than half a year of study, if Lin Dong were asked to design a supersonic fighter jet now, the gap would probably still be quite large.
But designing a small, subsonic dogfighting model aircraft that is less than five meters long is a piece of cake.
"Subsonic dogfighting model aircraft..."
Looking at Lin Dong's nonchalant expression and then at the rapidly improving fuselage structure on the screen, Cai Wei and Zhang Yue exchanged a glance. Their hearts were no longer filled with shock, but rather pure numbness.
There's no way around it; the more professional someone is, the more they understand the technical difficulties involved.
The three students from Northwestern Polytechnical University worked hard for several months but only managed to design a low-speed model aircraft with a speed of Mach 0.3, which crashed as soon as it took off.
But now, the elementary school student in front of them not only pointed out the defects in the engine of their model airplane, but also casually pulled out a few papers and imprisoned Wang Rui, who was in charge of designing the engine.
Now, the goal is to design a subsonic dogfighting model aircraft with a speed of Mach 0.7 and a canard configuration.
Mach 0.7 is close to the Mach 0.8 standard limit for subsonic aircraft, a speed beyond their current level of knowledge.
Not to mention that Lin Dong designed a canard-layout dogfighting model aircraft, unlike their flying model aircraft that just take off and circle around a few times. The two are worlds apart.
"Alright, part of the fuselage design is complete. Let's manufacture these parts first."
Very quickly, in less than forty minutes.
Lin Dong completed the overall structural design of the fuselage, perfected the dimensions and parameters of some fuselage parts, printed them out and handed them to Zhang Yue, and also took out a certificate and a key.
"Go out, turn left, and walk about fifty meters to find a regular processing workshop, which should be idle now."
There are CNC machining tools there; I will settle the cost of the materials and the tools later.
"Understood, the parts for our model airplanes are manufactured there."
Without wasting any words, Zhang Yue picked up the blueprints and went to the processing workshop in a swift and decisive manner.
"Um, Coach, oh no, DongShen..."
Watching Zhang Yue leave, Cai Wei seemed to remember something and raised his hand to speak, "I have some free time now and would like to learn about the aerodynamic design of this canard fuselage. May I ask you?"
"You? Canard aerodynamic design?"
Lin Dong glanced at Cai Wei, his eyes looking as if he saw Benboerba volunteering to fight Sun Wukong.
"This is a bit too much for you freshmen to study," Lin Dong thought for a moment and then politely declined.
We've seen the jokes about Qian Xuesen and calculus, and Yuan Longping talking about the students' face-scratching pictures.
He understands that there are natural barriers to communication and understanding between people, and that teaching others is a troublesome matter.
Wang Rui had no choice but to find some laborers to help him; it was a matter of equal exchange.
But Cai Wei...
Avoid creating unnecessary trouble.
"..."
Hearing Lin Dong's polite refusal and seeing Lin Dong's elementary school uniform, Cai Wei was speechless, his mouth agape.
I'm a freshman at Northwestern Polytechnical University, and this is beyond the standard for me to study. But it's not beyond the standard for you, a primary school student, to study this?
"Dong Shen, I'm not asking for advice for free. I have a way to help you purchase a better set of avionics hardware, including infrared detectors, radar modules, low-light lenses, satellite positioning modules, and so on."
Cai Wei could see how much Lin Dong valued the model airplane. After hesitating for a moment, he proposed his own terms for exchange.
At a national defense university like Northwestern Polytechnical University, studying is like cultivating immortality in a sect.
Whoever can better showcase their talent and learn and progress faster will be able to participate in real-world projects first and gain the favor of big shots first.
In short, this is a war for inner disciples, true disciples, and the sect's holy son.
Now that it's summer vacation and he can meet a master who can improve his skills, Cai Wei naturally knows how to seize the opportunity.
"Um?"
Lin Dong's eyes lit up: "Better avionics hardware... military-grade?"
PDLP