Lin Yuan saw Luo Chaoying's expression and hurriedly asked, "What's wrong with you?" Is there something wrong? ”

Luo Chaoying said: "The caliber of this shell has reached 150 millimeters, but this is nothing, look at the length of this shell, it is 500 millimeters, and the bullet diameter ratio has exceeded three, this number has caught up with the level of grenade development in the 50s of the 20th century, it seems that the Russians' skills have made a lot of progress!" ”

Lin Yuan was just about to ask if he could determine the range of the shell, Luo Chaoying had already leaned his head close to the shell, he looked at the shell carefully, and then said, "I have to see what they put in the shell?" ”

Luo Chaoying said, called a few assistants, and said, "You go get tools, let's disassemble this shell." ”

Several assistants quickly brought wrenches and other tools, Luo Chaoying pointed to a position of the warhead, and said: "The Russian shell is divided into two parts, and the threaded connection is used between the head and the middle and rear parts, and this connection method is no longer visible, so we will take it apart." ”

Lin Yuan hurriedly said, "Will it be dangerous?" ”

Luo Chaoying smiled: "Don't worry, there will be no problem, the explosives in it must be very stable, if it explodes as soon as it touches, no one dares to use it to load shells." ”

When a few people dismantled the shell, and the dense pale yellow explosives inside were exposed, Luo Chaoying looked at it carefully, and then lightly fanned it with his hand, sniffed the smell of the explosives, and said in surprise: "The Russians have begun to use TNT as explosives!" ”

Lin Yuan knew that the widespread use of TNT in the war was during the First World War, and the development of explosives technology was also an important part of the development of military technology, and the improvement of explosives played a decisive role in the improvement of the power of weapons and equipment, but Lin Yuan was more worried about deeper things.

The Russians improved the shape of the shell, which seems to be only a small change, and behind this, is a further grasp and understanding of aerodynamics, it is difficult to imagine that without a solid foundation in aerodynamics, they can design a shell with a body length of three times the caliber, can design a boat-shaped bullet tail, if they have a deeper grasp of aerodynamics, will they develop an airplane?

Lin Yuan was thinking about it, and Luo Chaoying asked, "What are you thinking?" ”

Lin Yuan didn't tell Luo Chaoying what he was thinking, but asked: "Luo Lao, the Russian artillery is very accurate, causing a lot of damage to our troops, I want to blow them up, but I can't determine their location, can you find some clues from the shells, deduce the range of the shells, I can deduce the location of the enemy's artillery from the range." Luo Chaoying thought for a while and said: "There is a way, but the accuracy is a little worse." ”

Lin Yuan said: "As long as there is a distance, I will find a way to do the rest." ”

Luo Chaoying said to an assistant: "Bring our magnifying glass." The assistant quickly took a magnifying glass and put it in Luo Chaoying's hand, Luo Chaoying walked to the position of the bullet belt, looked at it carefully, and then gently knocked on the bullet belt, and said: "You see, this bullet belt is copper, and there are indentations caused by friction with rifling in the gun breech. ”

Lin Yuan took the magnifying glass, looked at it as well, and asked, "What can be seen from this?" ”

Luo Chaoying said with a smile: "According to the wear of the cartridge belt, it can be seen that the speed of the shell moving in the barrel, the speed has a certain relationship with the initial velocity of the muzzle, we can determine the initial velocity according to the rotational speed, and then use this initial velocity to roughly estimate the range of the shell." ”

"However, the results obtained by this are very inaccurate, because we do not know the angle of the shell when it was fired, and the influence of the air environment is also very large, so I say that there will be a lot of error."

Lin Yuan nodded and said, "Then please calculate a range for me, and I will make a trade-off according to this range." ”

When Lin Yuan came back from Luo Chaoying, he was about to come to aerial pictures of more than ten kilometers deep opposite the position, on these pictures, there were many open spaces with barracks, Lin Yuan knew that those places were Russian military camps, but due to the heavy snowfall, everything in the barracks was covered, so Lin Yuan couldn't know which places were artillery positions.

At midnight, Luo Chaoying sent the possible range results over, the range range, 11,000 kilometers to 17,000 kilometers, Lin Yuan compared the Russian military camps on the aerial map, there were nineteen in this range, Lin Yuan was very helpless, the number of military camps was too much, and it was impossible to determine the location of the artillery position.

Lin Yuan reluctantly put these pictures aside, it seemed that his method had failed, and it was impossible to use this method to know the location of the artillery position. Lin Yuan suddenly felt a panic, he couldn't help but think of the scene of his first time flying a fighter plane, when the plane rose into the sky, his mind seemed to be blank, he forgot all the subjects he was going to fly, and finally landed in a circle in the sky.

Lin Yuan walked outside the tent, looking at the starry sky on a winter night, the stars were like the eyes of the night, Lin Yuan couldn't help but think: After tomorrow, if there are still Russian shells falling on our positions, he will be considered a broken promise, and at that time, the morale of the soldiers and civilians in the city will undoubtedly be greatly frustrated!

Lin Yuan thought to himself, "I came here this time to find out if the Russians used the radio?" I can't care about that anymore......" Suddenly, the words 'eye' and 'radio' popped into Lin Yuan's mind, as if a light of hope flashed in the dark night.

Lin Yuan thought: "When the artillery calibrates and shoots, if the radio is used, isn't the radio the eyes of the artillery?" As long as you find the location of the enemy's eyes, don't you know the enemy's location? ”

Thinking of this, Lin Yuan immediately picked up the communicator and ordered the Beijing ship: "Immediately take off a J-25, carry an electronic reconnaissance pod, and find out if there is an unknown electromagnetic signal in the area where I am located." ”

After Lin Yuan gave the order, he was anxiously pacing outside the headquarters, and half an hour later, Xu Feng drove a J-25 to the vicinity of Qiqihar, and quickly contacted Lin Yuan and said: "I have arrived in the nearby airspace and am conducting a signal search." ”

Lin Yuan then began to wait anxiously, and after another half an hour, Xu Feng said, "There is no unknown electromagnetic signal around here!" Lin Yuan's heart was cold again, and he thought, "Could it be that I really thought wrong?" The Russian army did not use radio? Their scouts, or use the telephone to correct the shooting of artillery units? ”

Lin Yuan tightened his eyebrows, searching for the radio signal of the Russian army was his last hope, couldn't this method work? Lin Yuan suddenly thought of one thing, that is, he didn't hear the explosion of Russian artillery shells all night! Lin Yuan suddenly understood that in the dark night, the scouts couldn't see the target clearly, so there was no need to correct the shooting for the artillery.

Lin Yuan thought excitedly: "As long as we make a big move on the position, the Russian scouts will think that we are going to attack, so they will let their artillery shoot!" Thinking of this, Lin Yuan hurriedly called He Lizhi and said, "You quickly order the troops, light a bonfire on the position, and create a momentum, so that the Russian army thinks that you are about to attack!" ”

(Author's note: I'm going to catch the train out in a while, so I'll pass all three chapters at once, and I wish you all a happy read)