Genius is just the threshold for me!

Chapter 134 The Radar is Overweight and Oversized

The following morning, at Xu Ziming's home.

Xu Qingling slept until eleven o'clock, then came out wearing a short-sleeved long dress, rubbing her eyes. When she saw Lin Dong sitting on the sofa looking at the computer, she was stunned for a moment, then exclaimed with delight.

"Lin Dong, when did you get here?"

"Xiao Dong came over this morning, and you're still sleeping in."

Zhou Xiaoyan was preparing vegetables at the restaurant when she interrupted Lin Dong before he could answer, saying, "Your Uncle Lin and Aunt Xia have gone on a trip, and Xiao Dong will be staying with us for a while."

"Really?" Xu Qingling was even more surprised.

"real……"

Zhou Xiaoyan said calmly, "So you can't sleep in anymore. You have to get up before eight o'clock every morning, just like Xiaodong."

"what?"

Xu Qingling's expression froze. The next second, she walked to Lin Dong's side, blinking her eyes with a pitiful yet disbelieving look: "You get up this early now?"

"Uh-huh."

Lin Dong smelled the faint fragrance emanating from the girl, looked up at Xu Qingling's pitiful expression as she winked at him, and nodded with a smile: "I have some things to do these days, so I need to get up early."

"Ugh! You're not cooperating with me at all..."

Upon hearing this answer, Xu Qingling felt as if the sky had fallen, and cried out in despair, "My holiday sleep-in!"

"Once I'm done with my work this morning, we'll have time to play games or go out together this afternoon," Lin Dong added with a smile.

He hadn't planned to stay here when he came over this morning.

Xu Ziming, who was just about to leave for work, snorted and said coldly that if he couldn't come, he should have Zhou Xiaoyan bring him food so that he wouldn't have his meals disrupted during this busy period.

Ultimately, after troubling Zhou Xiaoyan to bring him meals every day, and considering the option of him coming to stay with her for a while, Lin Dong decided that the latter was better...

"real?"

Xu Qingling immediately suppressed her sadness and said happily, "That's alright, I'll go reset my alarm clock for school right away!"

"Stop acting like a drama queen."

Lin Dong pointed to the kitchen: "Go brush your teeth and have lunch."

"That's called breakfast."

Xu Qingling corrected her seriously, then stuck out her tongue a little embarrassedly before running off to brush her teeth and eat breakfast.

Ding-dong-

As soon as Xu Qingling walked away, Lin Dong's computer beeped, and a brand new email popped up.

[Chief Engineer Chen from CETC (607 Institute)]: Hello, Engineer Wang, I personally checked the calculation this morning.

To meet the performance requirements of Chengdu Aircraft Industry Group (CAC) for large ships with a detection range of over 300 kilometers and a ground resolution of less than 0.5 meters at an altitude of 45000 meters.

Such a synthetic aperture radar system weighs approximately 290 to 320 kilograms. The antenna diameter is 1.3 meters, and the integrated equipment, including the transmitter, signal processing, and heat dissipation system, requires roughly 10 to 12 cubic meters of space.

"Weighing between 290 and 320 kilograms, with a 1.3-meter antenna, 10-12 cubic meters of space, the size of a typical Japanese luxury car..."

Lin Dong frowned subconsciously.

The weight and size far exceeded his initial expectations.

After all, in later generations, civilian radars have become ubiquitous, and some miniature radars are even smaller and lighter than a flat panel.

Although the performance and accuracy of these radars are far from what is required for the WZ-8 reconnaissance aircraft.

However, this small glimpse reveals the bigger picture: to achieve the same precision and performance as the WZ-8 reconnaissance aircraft, the weight and size of the radar would not be significantly increased.

"No wonder in my previous life, this reconnaissance aircraft, known as the 'aircraft carrier killer's eye,' wouldn't be unveiled until 2019... How could it possibly function with just such a heavy and large radar?"

Lin Dong closed the email and shook his head slightly.

In 2012, China's domestically developed radar technology had not yet achieved a comprehensive breakthrough.

During this period, the accuracy of domestic synthetic aperture radar was somewhat inferior to that of the radar system used by the US Global Hawk reconnaissance aircraft decades earlier.

High-performance synthetic aperture radar is the core equipment of high-altitude reconnaissance aircraft.

If the layout is based on this weight and size, even if he is in charge of the chief engineer's design, the design space for the entire WZ-8 project will become very cramped.

"Wait for the parameters of the other components."

Lin Dong was not in a hurry and patiently waited for replies to the other emails.

Ding-dong-

[Chengfei Zhang]: Engineer Wang, I personally verified the calculations. To build an avionics cable harness system with a bus bandwidth of 10Tbps in a 12m x 7m size, if copper cables are used, the entire system would weigh 450 to 480 kilograms, and the signal interaction equipment would require 2.5 to 3.2 cubic meters of space.

如果使用光纤+1394B数据总线做集成，全套系统重量可以降到30至40公斤，信号交互的设备需要1.1至1.4立方米的空间布置。

"Given the weight and size difference, we can only use fiber optic cable + 1394B bus..." Lin Dong pondered for two seconds and then made his decision.

His Hot Air avionics system has always used copper cables for avionics communication connections. The advantage is that the wiring harness is stable, but the disadvantage is that it is heavy.

Even with the size and functional structure of the Hot Hot, the copper cables connecting all the servos, tail fins, engines, detection radars, etc., weighed nearly fifty kilograms.

If the copper cable is replaced with a fiber optic + 1394B bus solution, the whole system will become very lightweight, but the disadvantage is that fiber optic cables are relatively fragile.

Fiber optic cables can break when subjected to severe vibrations, leading to interruptions in avionics, communication, and control. This is especially noticeable in moving parts such as wings, tail fins, and rudders.

In order to solve this problem, the older Su-27 aircraft invented a technology called "elastic support floating".

The entire wiring harness is suspended one by one in the vibration isolation frame, just like a suspension bridge, but the disadvantage is that it takes up a lot of internal space.

The WZ-8 now needs to use a fiber optic + 1394B bus solution, which requires some special protection and the addition of two redundant designs.

Ding-dong-

[Chief Engineer Zou of Xi'an Institute of Optics and Precision Mechanics]: Hello, Engineer Wang, I personally verified the performance requirements of the high-precision infrared instruments, optoelectronic instruments, hyperspectral imagers, and high-resolution visible/infrared cameras requested by Chengdu Aircraft Industry Group...

Ding-dong-

[Chief Engineer Li of the 51st Research Institute of China Electronics Technology Group Corporation]: Hello, Engineer Wang, I personally verified the electronic reconnaissance equipment requested by Chengdu Aircraft Industry Group this morning...

Emails started popping up in my inbox one after another.

Perhaps because it was an urgent, confidential inquiry, the subordinate departments and laboratories of Chengdu Aircraft Industry Group (CAC), as well as various other units, responded relatively quickly.

Before 11:30, except for some emails that required actual experiments, all the other inquiries were replied to one after another.

Lin Dong looked at the compiled parameter information, glanced around, frowned, and then stood up to ask Xu Qingling a question.

"Qingling, where did Uncle Xu put his paper and pen...?"

"I'll go get it for you."

Having just finished breakfast, Xu Qingling, who was folding vegetables with Zhou Xiaoyan, immediately put down her things, went into the study, and handed Lin Dong a piece of confidential paper and a ballpoint pen.

"Lingling, draw the curtains."

Zhou Xiaoyan looked up from the restaurant, turned on the anti-eavesdropping device in the room, and then pointed to the open curtains.

"oh."

Xu Qingling nodded, took a few quick steps, and then with a light leap, reached out and pulled all the curtains closed.

Zhou Xiaoyan gestured for silence and whispered, "From now on, Xiao Dong must remember to close the curtains before writing anything. If there are any missing pieces of paper, whether they have any writing on them or not, put them in the shredder."

If he gets too engrossed in talking to your dad, remember to turn on the security device...

As an employee of the Chengdu Aircraft Industry Group's Flight Test Integration Department, Zhou Xiaoyan's work does not involve specific research and development matters or process improvements, and strictly speaking, she is not a formal researcher.

But she had seen the working conditions of many core researchers at Chengdu Aircraft Industry Group.

Sometimes, once a discussion begins, one's focus quickly becomes absorbed, and one loses track of time and the surrounding environment.

"Okay, I understand."

Xu Qingling turned and glanced at Lin Dong, then nodded earnestly.

Lin Dong didn't notice the conversation between Zhou Xiaoyan and Xu Qingling, mother and daughter.

He glanced up at the curtains that were already drawn, placed the confidential paper with no traceable origin on the table, removed the pen cap, and began writing formulas and data rapidly on the paper with great concentration.