Open an aircraft carrier to fight against Japan

Shen Wanqing nodded solemnly, and said, "This reminds me of something!"

Lin Yuan was very surprised, and thought: "This incident just happened, it was absolutely impossible for Wan Qing to know before, but judging by her appearance, she must know something that I don't know, what could it be?" These Lin Yuan asked: "Wan Qing, what did you remember? Tell me quickly."

Shen Wanqing said: "Let's talk while we go to eat." The two walked out side by side, Shen Wanqing said while walking: "I remembered a piece of information about the social situation in North Korea, and that piece of information is as follows: The Japanese garrison of Mount Hamgyong asked the nearby residents to hand over a certain amount of turpentine, but I can’t remember the exact amount.”

Lin Yuan asked: "Does this information have anything to do with what I'm talking about?"

Shen Wanqing said: "I suspect that what the Japanese army burned was turpentine, which is easy to burn. As for the black smoke, just pour some water on it when the turpentine is burning."

Lin Yuan thought for a while and said, "What are the Japanese soldiers doing burning turpentine in the mountains?"

Shen Wanqing shook her head and said, "I don't know, maybe it's a religious ceremony." Lin Yuan chuckled, and the two went to eat and put the matter aside. Early the next morning, Lin Yuan received Xiao Yingwu sent a message saying that the smoke had cleared, and Lin Yuan immediately sent a message to Xu Feng to let Xu Feng continue to take off and scout the situation.

Xu Feng took off at [-]:[-] in the morning, and at [-]:[-] in the morning, he sent a message to Lin Yuan, saying, "It's strange, the Japanese army started burning things again!"

Lin Yuan asked in surprise: "Starting to burn things again? What are they going to do?"

Xu Feng sighed and said, "Little devils are not human, so you can't use human thinking to guess what you do!"

Lin Yuan didn't speak, but was contemplating the purpose of the Japanese army's burning. At this time, Xu Feng said: "Okay, let's not talk about it. I'm going back to the voyage. You can let me know when the smoke clears."

Lin Yuan agreed, and Xu Feng returned immediately. Lin Yuan stood up and paced in the office, thinking to himself: "What are the Japanese army going to do? What are they burning in the woods? Why are they burning? I was blocked by thick smoke twice..."

Lin Yuan stopped suddenly and thought: "What did I think just now? 'Our plane was blocked by thick smoke twice', that's the sentence! This sentence means: as long as our plane flies to the little devil Nearby, the little devil started to burn things, and the burning of things would produce thick smoke, and our plane would be blocked, could it be... Could it be that the little devil burned things to block our fighter plane?"

Thinking of these, Lin Yuan shook his head repeatedly, and told himself in his heart: "Impossible, absolutely impossible! If the little devils burn things to stop the plane, then they must know in advance that the plane is going to them! Although they know that we have planes, but How did they know our plane was going to them? Did they have a radar!"

Lin Yuan took a deep breath and thought: "Don't jump to conclusions so early, maybe the Japanese army used the most primitive method of visually searching for planes, but Xu Feng was 50 meters away from the little devil when he first discovered the black smoke." How many kilometers, more than 50 kilometers, with the visual stealth design of the J-25, it is impossible for the little devil to spot it with his eyes at a distance of [-] kilometers!"

The more Lin Yuan thought about it, the more puzzled he became, and he thought: "Could it be that the little devil really made a radar? This may not be impossible. First of all, in principle, my sale of radio communication equipment has promoted the world's research on radio. Research on the use of electromagnetic waves to detect and locate targets has been carried out, and it is very likely that Japan has achieved considerable results."

"From a technical point of view, the electronic tube industry in the world has reached a considerable level. The operating frequency of early radars was relatively low, which was basically the same as the communication frequency. With the emergence of magnetrons in the future, the operating frequency of radars gradually increased. , so the electronic tubes of this era can fully support Japanese-made radars, and it is entirely possible for Japan to develop radars!"

Thinking of this, Lin Yuan immediately contacted Xu Feng and said, "You haven't landed yet, have you?"

Xu Feng said: "I'm entering the field, I'm going to land right away, what's the matter? Do you have anything to do?"

Lin Yuan said: "You return immediately, I suspect that the little devil found you with the radar!"

Xu Feng laughed out loud after hearing this, and Lin Yuan asked anxiously, "What's so funny about you?" Xu Feng smiled and said, "I'll talk to you in detail when I get the plane up first." So Lin Yuan heard Xu Feng say: "Bird's Nest, Bird's Nest, I'm Flying Eagle, the situation is urgent, I won't land for now."

After a while, Xu Feng said: "Okay, I'm at a high altitude now, let me tell you why I am laughing, our plane is a stealth fighter! It is difficult even for the advanced American radars of our time to detect it, even if Now that the Japanese have made radar, which is also an old and old radar of an early model, how could they detect us?"

Lin Yuan smiled and said, "Yesterday you boasted to me that you are a genius with an unforgettable memory. You forgot the lesson on 'radar target characteristics' taught at the flight training base? The radar cross-sectional area of ​​a target varies with the radar operating frequency band. However, if a certain type of aircraft is invisible to electromagnetic waves of certain frequency bands, it will "show itself" to electromagnetic waves of other frequency bands, so no aircraft can be invisible to electromagnetic waves of all frequency bands!"

"Take our J-25 as an example. Most of the target search radars and target tracking radars of our era work in the X-band. In order not to be detected and tracked by the enemy's radar, our J-25 is designed to be stealthy in the X-band , and the frequency of electromagnetic waves used by the Japanese army is definitely far lower than the X-band, so their radar can see you completely."

"Although they can see you, they only know that there is a flying object flying towards them, and they don't know anything else, but it is enough, because their plan is: as soon as they see a flying object coming, they will set it on fire immediately Burn things and create smoke to cover themselves! That way we can't attack them!"

When Xu Feng heard Lin Yuan's words, he was so surprised that he didn't speak for a while. Lin Yuan said at this time: "In order to save equipment, our pilots don't turn on the radar's electronic reconnaissance and jamming modules when flying, so you can't find the Japanese radar. Electromagnetic waves, you fly back now to detect if there are Japanese electromagnetic waves in the airspace!"

Xu Feng thought for a while and said, "Don't you have an electronic jamming company? Why don't you let them interfere?"

Lin Yuan said: "The electronic jammers of the electronic jamming company have a very narrow operating frequency band. The operating frequency of the Japanese radar must have exceeded their detection frequency band, otherwise they would have reported it to me long ago."

Xu Feng said: "Okay then, I'll go to their airspace and detect their electromagnetic waves." After Xu Feng finished speaking, he returned to the Japanese army's position and turned on the electronic reconnaissance module of the airborne radar when he was approaching. Display on the screen: Unfamiliar frequency found!

Xu Feng couldn't help but screamed, and said, "Okay! The little devil really got the radar out!"