"More than 150 meters, 150 kilometers?" Li Kongrong was not satisfied, he felt that 150 meters was too high and 150 kilometers too close, so he said: "How much power does it have?" If you increase the power, can you measure further? ”

"It can indeed be measured further. Pen × fun × Pavilion www. ｂｉｑｕｇｅ。 info "Meng Zhaoying agrees with Li Kongrong. "But this is not ideal, and the power of the transmitter is attenuated by electromagnetic waves back and forth. The loss of one-way transmission, the power attenuates inversely proportional to the square of the distance with the distance, and the two-way is attenuated with the two squares of the distance, that is, to the fourth power. This means that the transmitter power must be increased by a factor of sixteen in order to double the range. The current power is 25,000 kilowatts, and if the detection range is to be doubled, the power will reach 400 kilowatts, which is ....... Hansheng, with such a lot of power, will it be discovered by the enemy? ”

Li Kongrong did not expect that the power would be increased by 16 times, and the detection range would be doubled, but fortunately, 300 kilometers for aircraft and 600 kilometers for large ships would be enough. When the AWACS aircraft patrols, the entire fleet is divided into two circles, the inner circle is based on the aircraft carrier radar, or helicopter radar as the core, it is enough to detect the airspace around the aircraft carrier for 300 kilometers, and the outer circle is the early warning aircraft. If the detection range of the aircraft is 300 km, then the AWACS aircraft will make a circular motion around the aircraft carrier with a radius of 600 km.

In this way, early warning aircraft can detect planes that are 900 kilometers away from the aircraft carrier and more than 150 meters away, and ships that are 1,500 kilometers away from the aircraft carrier. This is far enough, and the safety of the AWACS aircraft itself can be guaranteed sufficiently. The detection range of 300 kilometers is enough for the AWACS aircraft to make correct evasion measures, and as for the AWACS aircraft, it was detected by the Japanese army......

"As long as the radar in the sky keeps releasing signals, no matter how small the power is, the enemy will always be able to detect it over time." Li Kongrong said, "Since it will be discovered, why not have a stronger signal, so that the detection distance is long and the warning time is long." ”

"I see." Meng Zhaoying is in charge of technology, and he is not clear about naval operations, but Li Kongrong will be clear to him as soon as he says this.

"With today's technology, can a computer really process a thousand signals?" The AWACS aircraft uses not centimeter-wave radar, but meter-wave radar, which is equivalent to saying that there are no technical problems on the transmitter, and the difficulty is to receive and process. Just now, a group of mathematicians and computer experts on the shore said that a new computer would be needed to solve the problem, but now there were only three people on the AWACS plane, Meng Zhaoying, and Ren Zhigong, and he wanted to hear their opinions.

"It's okay on the ground. I just don't know if the computer will not adapt to the soil. Ren Zhi said. There is no water and soil in the sky, but Ren Zhigong means that Li Kongrong understands that he is also worried about the stability of the equipment, and there are always various problems in complex things.

"What if it's just an ordinary pulse-wave radar?" Li Kongrong asked. He wanted to make a comparison between the two radars.

"Ordinary pulse-wave radar is simple." Meng Zhaoying said. "It's just putting ground-based radar on the plane. The difficult thing is the antenna, and now the problem of the antenna has been solved, the plane has done wind tunnel tests, and has actually flown a few times, and the pilot said that there is no problem. Compared to Doppler, pulse radar cannot detect the speed and direction of flight of the target, and the distance and altitude are known. As I said earlier, the height is very inaccurate, but it would be better to get closer. ”

"Hmm." Meng Zhaoying gave him two choices, one is a Doppler radar that can measure speed and direction, and the other is a pulse radar that can only measure range and altitude. He hesitated for a long time before saying, "Four planes, for the sake of safety, I think it's half each." ”

"Half each?" Meng Zhaoying and Ren Zhigong looked at each other, nodded and said, "It's okay, it's safe this way." If the computer performance is stable, we will change it when the time comes. ”

Four long-range early warning aircraft, but the aircraft carrier fleet does not only have long-range early warning aircraft, Li Kongrong then asked: "How is the small centimeter-wave radar going?" Can it be mounted on a helicopter? ”

"The test equipment has been built, but the United States has not yet brought the helicopter over." Ren Zhigong said. "As soon as we came, we were able to install and test it. There are also shipborne radars, which have all been built, and are waiting for loading and testing. ”

"Then we have to wait for the aircraft carrier to be launched." Li Kongrong was quite satisfied when he saw that the radar had been built, but he asked again when he thought of the cost. "What about the cost of radar? How much does a remote one like this cost? ”

"The cost of the shipborne radar is ten thousand pounds." Ren Zhigong seems to be a little familiar with cost. "The small ones are cheap, not only 5,000 pounds, but the magnetron has to be mass-produced, and it is not cheap if it is not mass-produced. The price of the remote is on the antenna, especially the cover is very troublesome, it is made of fiberglass, and all sides must be the same thickness, because the cover does not rotate the antenna, and the thickness will not be the same as the echo, this cover has been done several times and has not been done, I don't remember how much it spent, I can only ask Mr. Wei. With the addition of computers, I estimate that the long-range radar must be more than sixty thousand pounds. ”

"I haven't counted the amount of money spent in the lab in the past few years." Speaking of cost, Meng Zhaoying also reminded -- there are more than 500 people in the radio research laboratory, accounting for more than half of the entire research institute, and the money spent is also the most fierce.

"Yes, the lab didn't count." Ren Zhigong nodded and said, "Brother Han Sheng, this is a sky-high price." ”

"The price is sky-high." Li Kongrong didn't care about the money spent at the institute. "After the war is fought, the radar with poor performance can be sold to the outside world. The money will finally be earned. ......, is this a point of light? As he was talking, a bright spot suddenly flashed on the radar plane, and Li Kongrong pointed to the screen and asked.

"Yes. is the highlight. "Meng Zhaoying and Ren Zhigong both came over." It is an airplane that takes off from Zurich Airport. ”

"What do you think of the distance?" Li Kongrong does not understand the radar of this era.

"The distance is measured with a ruler." Ren Zhigong's answer almost made Li Kongrong laugh, but the distance was indeed measured with a ruler. There are two concentric circles drawn on the screen glass, one large and one small, Ren Zhigong took a ruler and measured it (he obviously did it for Li Kongrong to see, and told him that this is the method): "The distance of air detection is farther, probably more than 250 kilometers. The distance of the target is first measured with a ruler and then calculated proportionally - the first circle is 100 kilometers, the second circle is 200 kilometers, and the point of light here is less than half of the first circle, that is, about 40 kilometers. ”

"How do you judge the direction?" Li Kongrong held back a smile and asked again.

"Here it is." Ren pointed to the scales around the monitor's plane, as well as an unobtrusive electrocompass. "The azimuth is only relative to this aircraft. If it is in the sky, then it must be judged together with the electric compass. ”

"Understood." Li Kongrong wanted to laugh but couldn't laugh, although things were simple, they were very leading in this era. "It seems that it is better to have speed and direction."

"Yes. Doppler is more advanced, but signal processing is a big problem. Meng Zhaoying said. I hope that the computer side can make a computer that can go to heaven. ”

After spending half an hour in the AWACS plane, the three of them climbed on the back of the plane to look at the large disc with a diameter of eight meters. The disc is supported on the back of the aircraft with steel, and the part that intersects with the back of the aircraft has been riveted with rivets, and according to the design of the wind tunnel, the disc has a certain lift like a wing after the aircraft takes off, and stability is not a problem. Li Kongrong is worried about the tail, if the tail is too big, it will affect the radar echo, fortunately, the 314 is three tails, and the height is not high, and the modified model of the AWACS aircraft is four tails, and the interference is not too big.

"So be it." Standing on the back of the plane, the sun has already broken through the clouds and the lake is sparkling. Li Kongrong lit a cigarette with the wind on his back, looked at the direction of the sun and said. "Two Doppler planes and two pulse ones are also installed, but the space for computers is reserved, and all the good ones are changed to Doppler."

"Hmm." Ren Zhigong nodded, but Meng Zhaoying said, "What about the domestic side?" The fog in Chongqing will disperse again in May next year, and the Japanese planes will still bomb at that time, and more than 2,000 people will be killed in the first half of this year. ”

"The domestic problem is really a matter of secrecy." Li Kongrong said, "It's really hard to keep it a secret. The only way is for the navy to return to China to organize an air defense network, but Chongqing is very taboo about the navy because the navy is not loyal to the party-state. Now the Navy is negotiating with the country, and there will be results in the next two months, and once there are results, the radar will definitely be arranged, I can guarantee it. ”

Meng Zhaoying brought up the old matter again, but Ren Zhigong said: "Specialized. Harm people! It's a good country to tear them apart. ”

Ren Zhigong is from Shanxi, and Meng Zhaoying is from Hebei. The views of the two were actually not the same, but after Ren Zhigong finished speaking, Meng Zhaoying said: "Brother Hansheng, is naval independence really so important?" ”

"Brother Zhaoying wants to say that for the sake of the people, why can't the navy compromise with Chongqing, right?" Li Kongrong looked at him in the sunshine and smiled.

"I didn't say that." In the wind, Meng Zhaoying's answer was a little blunt. "I just don't want people to be killed by Japanese planes because they didn't give advance warning. Besides, now is the Anti-Japanese War, I really hope that Brother Hansheng can do things in power. ”

"Hey!" Li Kongrong shook his head, "If you really compromise with Chongqing, the navy will soon be completely wiped out like the First Sino-Japanese War." Of course, if the Navy had compromised with Chongqing from the very beginning, there would have been no Navy. None of you will be in Switzerland, there will be no radar, there will be no other technology. Everything you see now is happening because the Navy is not disturbed by Chongqing.

The independence of the navy was only for the sake of the war of resistance, or at least for the sake of ending it more quickly. To put it very ruthlessly, the death of the people is not important in the war, their life and death are less important than the life and death of the soldiers, and whether the soldiers live or die is not important for the war, the important thing is to win and end the war earlier. How many people do you think will die in this war? I don't think it will be less than twenty million! If we have 2,000 days to win, then 10,000 people will die in one day. The people who died in the bombing of Chongqing can be seen, and they will be published in the newspapers; The people who died all over the country could not be seen, and perhaps no one even buried their bones.

We are saddened only by the visible death, but we often ignore the invisible death. If the war had ended a day earlier, 10,000 lives would have been saved, which is far more than the number of people who have died in the bombing of Chongqing in the past few months. ”

"Are there really going to be so many deaths?" Meng Zhaoying was silent, and Ren Zhigong couldn't believe the figure of 20 million in Li Kongrong's mouth.

"Pretty much." Li Kongrong said with a wry smile: "There is no reserve in the national government, and the conscription in the national control area can only arrest Ding, and the warring areas are even worse. On the contrary, the occupied areas are better and life is relatively stable, but the Japanese have implemented grain control for a long time, and grain is being collected in various places. In fact, we have to thank God for these two years, because they are both good years, and the next ......"

"What's next?" Meng Zhaoying and Ren Zhigong both stared at Li Kongrong.

"The next must be a famine year, and there will be a shortage of food all over the country, especially in Henan. The Yellow River burst its banks, and the people were already miserable. The army also requisitioned grain in the local area, and it would not take two years for the local people to flee the famine, and maybe eventually they would have to eat people. Li Kongrong was full of compassion, but there was no way to prevent the ensuing famine.

"There's nothing you can do?!" Meng Zhaoying looked at Li Kongrong with blank eyes, he was born in a poor family, and he empathized with the suffering of the poor. "Hansheng, you must have a way!"

"If we don't counterattack, there is only one way, and that is to mix up improved varieties and increase rice production." Li Kongrong said -- Just this month, in Hainan, Professor Ding Ying found wild rice. Lee Kong Rong has already arranged for him to try breeding in Malaya. "The reduction in grain production is nationwide, and if the south increases production, perhaps the north, such as Henan, will not be able to collect grain on the spot."

"That's good. That's good. Meng Zhaoying looked extremely excited, and wanted to speak, but she suddenly coughed.

"Let's go down. It's too cold up there. Li Kongrong beckoned the two to get off the plane.

"Radar is okay, right?" Returning to the research institute from Pfefik Lake, Wei Ru asked when he saw Li Kongrong.

"It's not a big problem, it's a technical bottleneck, but the computer lab has thought of a solution." Li Kongrong said.

"Do you mean to rebuild electronic computers?" Wei Ru guessed that eight or nine was not far from ten, "What did you say?" ”

"I said I could give it a try." Looking at Wei Ru's expression, Li Kongrong said, "Is there a problem?" ”

"You've agreed, what more questions can I have." Wei Ru said with a smile. "At the end of each year, I get a lot of project applications, and the computer side is always trying to build a new computer. One is hundreds of thousands of dollars, I have been stuck and not given, you promised to increase the budget of the institute next year, anyway, I don't have a headache. ”

"You're not colluding to cheat project funds, are you?" Li Kongrong said speechlessly.

"How can you say it's a lie?" Wei Ru smiled, "Everything is real, if you want to do Doppler radar, you have to build a new computer, otherwise you can only use a ruler to measure the distance and look at the direction of the electric compass." ”

"Okay, don't worry about it." Li Kongrong didn't care about the money invested in the AWACS, he asked: "What is the situation on the metallurgical side, can that kind of aluminum alloy be imitated?" This is an important question. ”