Genius is just the threshold for me!

The next morning, with the arrival of May, the temperature was noticeably higher than the day before.

Lin Dong was the last to finish breakfast and took the bowls and chopsticks into the kitchen.

At this moment, Lin Weiliang and Zhang Xiali came out after changing their clothes, and Zhang Xiali gave Lin Dong some instructions.

"Xiao Dong, your dad and I are going out for a bit. When you go to your classmate's house with Qingling, remember to bring the fruit and snacks from the table. Don't go empty-handed; be polite..."

"understood."

Lin Dong responded from the kitchen.

I spent two minutes washing the dishes and chopsticks, then washed my hands again. When I went out into the living room, Comrades Lin Weiliang and Zhang Xiali had already left.

He picked up his laptop, casually sat down on the sofa, opened a bag of sunflower seeds, and started munching on them while reviewing data.

It was 9:30.

Suddenly, the door spun.

Xu Qingling walked in, holding the key and wearing a light green dress. The hem of the dress went past her knees, revealing a section of her fair calves. The decorative ribbon in front of the round collar was tied into a bow, vaguely revealing the shape of her collarbone.

"Let's go."

Xu Qingling changed into her own pair of slippers, ran to Lin Dong's side, glanced down at the screen, and asked, "What are you looking at?"

"Take a look at the data on the powered armor, the progress of the J-16D, and the information on the detonation engine."

Lin Dong looked at the few strands of hair that fell in front of him, then looked up at Xu Qingling's outfit and asked with a smile, "When did you buy these new clothes?"

"I bought this summer dress with my mom last week. I can't wear any of my clothes from last summer anymore... Does it look good?"

Xu Qingling answered with a smile, and then turned around in front of Lin Dong without hesitation.

She has grown almost 10 centimeters in the past year, surpassing Lin Dong in height. All of last year's clothes no longer fit, and she now wears almost all of this year's new clothes.

"Great, it looks very good."

Lin Dong nodded firmly.

"As long as it looks good."

Xu Qingling's smile grew even wider.

Suddenly, something occurred to her, and she asked curiously, "Is this the knock-up engine you mentioned, the next-generation engine that's even faster than the supercharged engine?"

"Yes, the theoretical top speed of scramjet is Mach 15, but in reality it's about Mach 10."

Lin Dong nodded: "But this engine can actually reach Mach 15 or even Mach 16."

"Isn't that difficult?"

Xu Qingling opened her eyes wide in surprise.

Having been with Lin Dong for so long, she has also taken the initiative to learn about these things, and knows that the higher the speed, the greater the technical difficulty.

"Apart from oblique detonation, the other two designs are much simpler than scramjet."

Lin Dong shook his head with some distress: "The main problem is that the material requirements are too demanding. There is currently no material that can meet the requirements."

There are three types of knock engines. One type is the PDE pulse knock engine, which uses 80-100 pulse ignitions per second to ignite the fuel-air mixture and achieve stable thrust.

This is somewhat like a super-simplified and overclocked version of the Big Brother Orion spacecraft program from the last century.

The second type is the RDE rotary detonation engine, which generates a rotating high-pressure detonation wave through an annular combustion chamber to complete the combustion of fuel and generate thrust.

The third type is the ODE (Obstacle Course) engine, which uses a special slope to create a permanent detonation wave to continuously ignite the fuel and generate power.

This structure and principle are somewhat similar to those of a scramjet engine.

However, the fuel in scramjet combustion only burns at supersonic speeds, and the combustion speed will not exceed Mach 3.

The detonation engine uses a more intense detonation combustion, which can be simply understood as continuously using an explosive mode to propel the engine. The resulting detonation wave can easily reach speeds of Mach 5 or higher, resulting in higher efficiency and top speed.

"No rush."

Seeing Lin Dong's troubled expression, Xu Qingling tugged at his sleeve and comforted him with a smile, "Let's take it slow and let Dad, Uncle Lin, Uncle Wang, and Uncle Jiao rest for a while."

"Your attempt at comforting me..."

Lin Dong was taken aback, then said with a wry smile, "If Uncle Xu heard this, he definitely wouldn't give me a good look."

"Isn't everyone giving you the cold shoulder?"

Xu Qingling blinked innocently.

She knew that Lin Weiliang and the others avoided Lin Dong like the plague.

To use the words of Comrade Xu Ziming, who privately complained to Comrade Zhou Xiaoyan at home.

A group of top domestic researchers and engineers, plus the command and mobilization of the entire Chengdu Aircraft Industry Group, plus most of the domestic industrial system, still couldn't withstand this kid's antics.

Even the leaders were being managed from above, and were being pushed to work incredibly hard...

"Well, you've even learned to joke around now."

Lin Dong reached out and pinched Xu Qingling's cheek, then locked onto the laptop and picked up the fruit and snacks that Zhang Xiali had prepared.

"They've gone, they've passed by. Li Tao, Su Yue, and Huang Qingyao will all be there soon."

"Alright, Mr. Lin, please set off."

Xu Qingling smiled, helped carry a bag, and the two set off together for Xia Ran's house.

After going downstairs, I went to the other side of the community.

Ring the doorbell to open the elevator lobby on the first floor, and take the elevator up to Xia Ran's house.

Before he even went inside, Lin Dong could already hear Zhang Yihao, Su Yue, Huang Qingyao and others talking through the open door.

"Looks like we're the last ones..." Lin Dong said to Xu Qingling.

"It's alright, they're used to it."

Xu Qingling answered softly and went in first. Just then, Xia Ran's mother, He Ying, came out of the kitchen wearing a floral apron and with her hands still a little wet.

"Aunt He".

Xu Qingling quickly addressed her politely, smiling as she said, "Thank you for your help today."

"Aunt He".

Lin Dong stepped forward and greeted him politely.

"No trouble at all, please come visit more often. No need to change your shoes, the housekeeper will mop the floor with you later."

He Ying responded with a smile, then glanced at Lin Dong and called inside, "Ranran, Qingling and Lin Dong are here."

"OK!"

Before Xia Ran could respond, Huang Qingyao ran out as soon as she heard the sound.

Upon seeing Lin Dong and Xu Qingling, he immediately adopted a threatening demeanor: "Tell me the truth... why are you two almost always the last to arrive at every gathering?"

No, I don't think so.

Lin Dong asked in surprise, "I was the first one to arrive."

"That's just fooling around."

Huang Qingyao's eyes widened in disbelief. "You think I've lost my memory? Lin Dong, when were you ever the first one here?"

"When you come to my house as guests."

Lin Dong answered calmly.

After saying that, he walked past Huang Qingyao and went inside, put the fruit he was carrying on the table, and then walked towards Li Tao and Zhang Yihao.

"No, we're just visiting your home, what kind of occasion is this...?"

Huang Qingyao stood in the doorway for two and a half seconds, feeling completely bewildered.

"Alright, Yao Yao, you can't argue with me, so stop thinking." Xu Qingling couldn't help but laugh twice and pulled Huang Qingyao inside.

"Qingling!"

At this moment, Xia Ran, wearing a light yellow home short-sleeved shirt and with her hair casually draped over her shoulders, came out with a bowl of washed peaches. Upon seeing Xu Qingling, she immediately smiled and called out.

"Xia Ran".

Hsu Ching-ling responded with a smile, placing the snacks on the table: "Is there anything I can help you with?"

"Not yet. My mom said we can just chat and eat."

Xia Ran smiled and beckoned Xu Qingling to come to the living room, placing the fruit on top of several dishes of peanuts, potato chips, and other snacks on the coffee table.

Then he poured two glasses of water, handed one to Xu Qingling, and called out to Lin Dong, who was chatting with Zhang Yihao.

"Lin Dong, have some water," Xia Ran said, placing the water glass in front of Lin Dong.

"Thanks."

Lin Dong turned around and reached out to steady the water glass.

Brothers and sisters, a mind-blowing discovery!

At this time.

Li Tao, who was sitting to the side looking at his phone, seemed to have discovered something. He jumped up from the sofa, looked up, and said with a face full of surprise, "It seems we really do have a hypersonic aircraft, and one that can travel at Mach 8 or higher... Someone was taking pictures of the sunset with a telescope yesterday, and they captured it!"

"Mach 8?"

Zhang Yihao's eyes widened, and he leaned closer in disbelief: "Is this for real? Did he mistake the Shenzhou spacecraft's return capsule for a real spacecraft?"

"Bullshit, there haven't been any Shenzhou rocket launches recently!"

Li Tao took out his phone and showed everyone a photo: "Look for yourselves, isn't this an aircraft...?"