Lin Yuan said: "When the shell flies away from the muzzle at a very high speed, the gunpowder gas behind the muzzle and the air in front of the muzzle jointly complete the shelling. ”

The crowd resounded in various languages, and a middle-aged man stood up and said in French: "I see that the main body of this cannonball is a slender rod, what is the material of this rod?" ”

Several other people also nodded, they all knew in their hearts that the hardness of this so-called rod armor-piercing projectile must be very high, so that it can penetrate the armor, and the density must be very large, so that under the same volume conditions, the kinetic energy will be large, but they have searched all the materials they know about the road, and they don't know what the material is in the road.

Lin Yuan smiled slightly and said, "Do you know that there is a metal called tungsten? ”

After Lin Yuan said this, he obviously saw that several people's eyes lit up, they were no strangers to this element, this element was discovered by the Swedish chemist Scheler in 1781, and in 1855, someone in France had already applied for a patent for the production of tungsten, but the large-scale tungsten industry did not appear until 1925.

The person who asked the question just now said, "If it's tungsten, where does your tungsten ore come from?" As soon as he finished speaking, he turned his head to Iniex and asked, "Did you Germany sell them ore?" ”

Germany's tungsten ore is famous in the world, and Iniex knows it, but he doesn't know if Germany has sold tungsten ore, so he had to shake his head, and the Frenchman turned his head to Lin Yuan and asked, "Where is your tungsten ore smelting factory, can you let me visit it?" ”

Lin Yuan smiled and shook his head, and just as he was about to speak, the Frenchman took out a notebook from his pocket and said, "Isn't it just money!" How much do you want? ”

Lin Yuan almost didn't laugh out loud when he heard this, there is no tungsten smelting factory in Ryukyu now!

So Lin Yuan pretended to be helpless and said, "This is a secret, and we have nothing to say." ”

There were also a few people who were eager to ask questions, and when they heard Lin Yuan's words, they all sat back, Lin Yuan saw that everyone had calmed down, and said, "Okay, let's go back and rest." ”

When everyone dispersed, Shen Wanqing came to Lin Yuan, handed him a document bag, and said, "Through our observation, the artillery experts in the crowd have been screened, here is the list." ”

Lin Yuan said with a smile: "The names on this list should be meaningless, and the names they submitted to us must be fake names." ”

Shen Wanqing smiled charmingly and said coquettishly: "Are you doubting my level?" I can't think of this bit of common sense, you can take a good look at what the famous documents have. ”

Lin Yuan opened the file bag, and inside was a pile of paper full of words, with photos of everyone's front and side, as well as dense text, Shen Wanqing explained: "These are the information we get from monitoring their behavior, our people chat with them, learn about their hobbies, and there are things they like to eat, if you want to assassinate them, we can poison these things......"

Lin Yuan smiled and said, "They are the heaviest flag I have ever drawn, how can I play chess if the chess pieces are dead!" ”

Shen Wanqing asked, "What other use can they have?" ”

Lin Yuan said with a smile: "When we develop to a certain point, I plan to go to their country and drag down their technical development!" ”

Shen Wanqing thought for a while and said: "I don't understand again, I just checked the information, there are two kinds of materials used in the core of the armor-piercing bullet, one is tungsten alloy, and the other is uranium alloy, you not only tell them the principle of the rod armor-piercing bullet, but also tell them the materials used, aren't you afraid that they will make the rod-type armor-piercing bullet?" ”

Lin Yuan said with a smile: "Don't worry, they can't make it, just the structural design of the shelling part is enough for them to break their heads, it's easier said than done, and the precision of their machining equipment can't make these things at all." ”

Shen Wanqing asked again: "Aren't you going to lead them to the road of big ships and huge cannons?" Does this have anything to do with big ships and giant guns? ”

Lin Yuan said with a smile: "Gradually, they will find that rod-type armor-piercing shells are a dead end, and they will eventually return to the road of increasing the caliber of artillery and increasing the power of propellants and explosives, but this detour will buy us a lot of time." ”

The next day, with the warm sunshine, Lin Yuan once again led everyone to the test site again, but this time Lin Yuan led them to the side of a large pool.

The pool is circular, with a radius of 200 meters and two meters high from the ground, Lin Yuan said with a smile: "This is our warship test center, where you can test the ups and downs of the warship in the waves, and pave the way for the follow-up design work." ”

Inix said: "This pool is so small, the scale is far from the sea, how can it be possible to simulate the sailing effect of a warship in the sea!" ”

Lin Yuan smiled: "Haven't you heard of the similar principle?" At this time, a man next to Innex explained to him in a whisper, and Innexus nodded and stopped talking.

The similarity principle is a scientific theory, in the design process of weapons, a lot of data is not calculated, must be obtained through the test, but limited by conditions, the test parts can not be exactly the same as the size of the real equipment, for example, to test the seakeeping of the warship, if you really build a warship out of the test, it is time-consuming, laborious and costly, so people think of replacing the real weapon with a model.

Scientific research is the most rigorous, so why do you say that the data obtained by the model is the same as that obtained by the weapon at real size? This is where the similarity principle comes in, and simply put, the similarity principle proves that after certain conditions are met, a model can be used instead of a real-size weapon.

Lin Yuan led everyone up to the high platform by the pool, only to see two small boats floating in the pool, Lin Yuan smiled and said, "Is there anyone who wants to visit the floating platform?" ”

At this time, six people in the crowd raised their hands, and Lin Yuan thought to himself, "This group of people should be experts in the field of ships." So Lin Yuan brought these six people into the cabin, the cabin was very spacious, and there were handrails on the walls around it, Lin Yuan smiled: "Everyone hold on to the handrails, our test is about to begin." ”

Waiting for the six people to grasp the handrail steadily, Lin Yuan walked outside and whistled vigorously, at this time, he saw that the water surface fluctuated, one after another water waves rushed towards the boat, the boat suddenly shook, Lin Yuan staggered back to the cabin, grabbed the handrail, and waited until he stood firm before saying: "We are simulating the sea state, there are impellers installed on the edge of the pool, they rotate and push the water waves, which are used to simulate the waves on the sea Lang, which is now a level 3 sea state, Lang is 0.7 meters high. ”

Lin Yuan blew the whistle twice, the wave was even bigger, everyone grabbed the handrails, and a few of them were slightly pale, looking seasick, Lin Yuan couldn't help but think: "The ship expert can still be seasick." ”

Lin Yuan blew another whistle, and Bo Lang gradually stopped, at this time Lin Yuan smiled and said, "Now we are going to show you the way not to be afraid of Bo Lang." ”

Lin Yuan pulled down a few switches in the cabin, and there was a "buzzing" sound under the cabin, and after a while, the wave Lang rose again, this time the wave Lang was bigger, Lin Yuan stretched out four fingers and said, "Fourth-level sea conditions!" Lang is 1.5 meters tall! ”

But the hull of the ship did not move!