Open an aircraft carrier to fight against Japan

Lin Yuan's words seemed to be an understatement. To a layman, there was nothing special about it, but to an insider, this sentence was almost provocative!Military equipment has always been light and small. The lighter and smaller the thing, the more space it can save, and it will have a great advantage in the layout of the entire system.

Lin Yuan said that the stereoscopic rangefinder is very large, which is equivalent to saying: "Your German equipment is not good enough, it is far behind!"

Of course William II heard Lin Yuan's implication, he didn't say much, but said with a smile: "Mr. Know if you know him."

Lin Yuan smiled and said, "Lead the way ahead." William II made a gesture of invitation, and led Lin Yuan forward, passing by a booth, where he saw colorful handicrafts. He stopped by the side and asked, "What are these?"

William II laughed and said: "These are all our German folk handicrafts. You may think that these things should not appear in technology fairs, but you don't know, these handicrafts are works of art. In my opinion, art It is as much a quintessence of our German culture as technology..."

Lin Yuan had experienced William II's "excellent" appreciation of art at the banquet, and when his voice paused, he hurriedly said: "In that case, let our people come and see, I don't know Can I buy some to take home?"

William II said with a smile: "If you like it, I can decide to give you a batch."

Lin Yuan thanked repeatedly, and then called everyone to come forward and watch.Lin Yuan took advantage of the crowd to separate him from William II, and quietly said to Shen Wanqing: "Did the stereo rangefinder take a picture just now?"

Shen Wanqing said: "There are so many people, I don't have a chance to take pictures."

Lin Yuan said: "Go back later, discuss with the staff member, take a picture of the stereo rangefinder, and pay attention to the size of the front objective lens."

Shen Wanqing said, "What is the use of filming this?"

Lin Yuan said: "The clarity and magnification of the telescope image are related to the size of the objective lens. With the size of the objective lens, we can definitely analyze some things, for example: if they are fighting at sea, how far away can they see it?" us."

Shen Wanqing nodded, turned back, and quickly took the photo back. At this time, William II came to Lin Yuan and smiled: "I thought of something interesting, I wonder if you can recognize it, let's go, I Take you to see."

William II took Lin Yuan to the side for more than 100 meters, and saw a house built on the open space. People outside the house hurriedly saluted when they saw William II coming. William II brought Lin Yuan into the house. It's not big, with a long table in the middle, and a huge box on top of the table.

William II said: "Now, please guess it?"

Lin Yuan said helplessly: "Do you think I'm a fairy? I can guess things through the screen!"

William II laughed and said, "Of course not, I will give you some interesting tips." Then William II picked up a piece of iron chain from the table, and said to Lin Yuan: "Have you seen this Something? It's used a lot in your China!"

Lin Yuan glanced at the iron chain, and saw a cone-shaped thing at the end of the iron chain. Lin Yuan understood it at a glance, so he said: "Of course I know what it is, this is a sounding hammer. This is what is used to measure the depth of the seabed when the ship is sailing."

William II smiled and said: "Very well, I almost forgot that you also have a lot of naval experience." William II opened the box, pointed to the things inside and said, "This thing will be completely Replace the position of the sounding hammer!"

Lin Yuan's heart was moved, and he seemed to have guessed what was in the box. Lin Yuan walked in front of it, and saw a large flat plate in the box, with small squares densely arranged on it, Lin Yuan said: "If I I guessed right, the contents of this box are..."

Lin Yuan hesitated for a while when he said this, not because he was not confident in his guess, he had already guessed: the thing in this box is an echo sounder, which works the same as sonar, except that it is more powerful than the need to detect echoes. Azimuth sonar is much simpler.

But Lin Yuan didn't know how to say an echo sounder in German, so he had no choice but to change the wording, pointing to it and said: "This thing can emit sound waves, and the sound waves will propagate in the sea water. After hitting the bottom of the sea, the sound waves will reflect back to the ship. This makes it possible to determine the distance from the ship to the bottom of the sea, which, as you say, takes the place of the sounding hammer."

"I don't think this is all about the echo sounder, because I haven't found the signal processing part, so I think this thing is just the matrix of the echo sounder. Sound and current can be transformed into each other through some special crystals. If these When the special crystals are arranged, they form a matrix, I don’t know if I’m right?”

After Lin Yuan finished speaking, King Wilhelm II was very surprised and thought: "What is the origin of this kid Lin Yuan? He understands all the latest technologies developed by our German Empire!"

While William II was surprised, Lin Yuan was also surprised, because the development of the Europeans was indeed too fast. Just now, the Pulan fire control system and the stereoscopic rangefinder appeared beyond the original era, and the echo rangefinder It is even further beyond the era. In Lin Yuan's era, this echo rangefinder did not appear until 1925.

William II smiled and asked, "Is it only for this purpose?"

Lin Yuan asked: "What? Does it have other uses besides measuring the distance to the bottom of the sea?"

William II said: "Of course, you can't guess it. Let me give you some hints. Have you heard of the Doppler effect?"

Lin Yuan nodded and said, "Isn't it the Doppler effect? ​​Of course I've heard of it, what's wrong?"

William II said: "Since you know the Doppler effect, you should know how to use this echolocator to measure the speed of our warship, right?"

It was only then that Lin Yuan realized that their depth sounder also had the function of measuring speed. In naval battles, if one wants to know the distance change over time, one must not only estimate the speed of the opponent's warship, but also know the speed of one's own warship. Before the appearance of various log meters, it was difficult for people to accurately estimate the speed of their ships.

Seeing that he had something that Lin Yuan didn't know, King William II was very happy, so he said: "Okay, there's nothing to see about this echo sounder, let's go, I'll show you something more important .”

A group of people came out from inside, and Shen Wanqing saw Lin Yuan's serious expression, so she asked, "What's wrong with you? Isn't it just an echo sounder? I don't think it's as useful as the rangefinder? Are you so ?”

Lin Yuan said in a low voice: "I am not worried about the echo sounder itself. The echo sounder is like a key to a treasure house. Inside the treasure house is the entire world of underwater weapons, sonar, submarines, I am really afraid that they will get the submarine out , do you know? Even if they come up with a submarine now, we can't guarantee a [-]% victory over it with the existing means!"