Open an aircraft carrier to fight against Japan

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 shell jointly complete the shelling. As for the more specific numerical calculation, it may not be possible to talk about it until tomorrow. over."

There were discussions in various languages ​​among the crowd, and a middle-aged man stood up and said in French: "I see that the main body of this shell that kills is a slender rod, and the material of this rod is What?"

Several other people also nodded one after another. They all knew in their hearts that for this so-called rod-type armor-piercing projectile, the hardness of the thin rod must be very high, so that it can penetrate the armor, and the density must also be high, so that under the same volume condition, the kinetic energy It will be great, but they have searched all the materials they know, and they don't know what this material is.

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

After Lin Yuan finished speaking, his eyes lit up. They were no strangers to this element. This element was discovered by Swedish chemist Scheler in 1781. In 1855, France Patents for the production of tungsten have already been filed, but a large-scale tungsten industry did not appear until 1925.

The person who asked the question just now said again: "If it is tungsten, where does your tungsten ore come from?" As soon as the words fell, he turned his head to Inex and asked: "Did you Germany sell them the ore?" ?"

Germany's tungsten ore is famous all over the world, and Inex knew it, but he didn't know whether Germany had sold tungsten ore, so he shook his head. The Frenchman turned to Lin Yuan again and asked, "Do you smelt tungsten ore?" Where is your factory, can you let me visit it?"

Lin Yuan smiled and shook his head. 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 laughed out loud when he heard this, Ryukyu does not have a factory for smelting tungsten now!

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

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

When the crowd dispersed, Shen Wanqing came to Lin Yuan, handed him a file bag, and said, "Through our observation, we have identified the artillery experts among the crowd. Here is the list."

Lin Yuan smiled and said, "The names on this list should be meaningless. The names they submitted to us must be fake names."

Shen Wanqing smiled charmingly, and said coquettishly: "Are you doubting my level? I would not think of this common sense. You should take a good look at what is in the name file first."

Lin Yuan opened the file bag, and inside was a stack of papers full of words. There were photos of each person's front and side views, as well as densely packed text. Shen Wanqing explained: "These are the information we obtained by monitoring their behavior. , Our people chatted with them, learned about their hobbies, and here are the things they like to eat, if you want to assassinate them, we can poison these things..."

Lin Yuan smiled and said, "They are the most important flags in my plan. How can I play chess when all the chess pieces are dead!"

Shen Wanqing asked: "What else can they do?"

Lin Yuan smiled and said: "When we develop to a certain point, I plan to go to their country to delay their technological 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 projectile, one is tungsten alloy and the other is uranium alloy. Tell them the principle of armor-piercing projectiles, and also tell them the materials used, are you afraid that they will make them out of rod-type armor-piercing projectiles?"

Lin Yuan smiled and said: "Don't worry, they can't make it. The structural design of the shelling part alone is enough for them to think about it. It's easier said than done. The precision of their machining equipment can't make it at all." Get these things out."

Shen Wanqing asked again: "Aren't you going to lead them to the path of the giant cannon? Does this have anything to do with the giant cannon?"

Lin Yuan smiled and said: "They will gradually realize that rod-type armor-piercing projectiles are a dead end, and they will eventually return to the road of increasing the caliber of the artillery and increasing the power of the propellant and explosives, but this detour will be for us. Gained a lot of time."

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

The pool is circular with a radius of 0 meters and a height of two meters from the ground. Lin Yuan said with a smile, "This is our warship test center. Here we can test the warship's undulations in waves and pave the way for subsequent design work."

Inex said: "This pool is so small, and its scale is far from the sea, how can it simulate the effect of a warship sailing in the sea!"

Lin Yuan smiled and said, "Haven't you heard of the similarity principle?" At this moment, a person next to Inics explained to him in a low voice, and Inics nodded and stopped talking.

The principle of similarity is a scientific theory. In the process of weapon design, many data cannot be calculated and must be obtained through experiments. However, due to limited conditions, the size of the test piece cannot be exactly the same as that of the real equipment. For example, to test For the seakeeping of warships, if a warship is really built for testing, it will take time, effort and money, so people think of using models to replace real weapons.

Scientific research is the most rigorous. How can you say that the data obtained by the model is the same as that obtained by the real-scale weapon?At this time, the principle of similarity comes into play. Simply put, the principle of similarity proves that after certain conditions are met, a model can be used to replace a real-scale weapon.

Lin Yuan led the crowd up to the high platform by the pool, and saw two small boats floating in the pool, Lin Yuan smiled and said, "Is there anyone willing to visit the floating platform?"

At this time, six people in the crowd raised their hands, and Lin Yuan thought: "This group of people should be experts in the field of ships." So Lin Yuan brought these six people into the cabin. There is a handrail, Lin Yuan said with a smile: "Everyone hold on to the handrail, our experiment is about to start."

When the six people held on to the handrails, Lin Yuan went outside and whistled vigorously. At this moment, he saw the water surface fluctuating, one after another water waves rushed towards the boat, and the boat shook suddenly. Lin Yuan He staggered back to the cabin, grabbed the handrail, and waited until he stood firm before saying: "We are doing sea simulation. There are impellers installed on the edge of the pool. They rotate and push the water waves to simulate the waves on the sea. Now It is a Class III sea state with a wave height of [-] meters."

Lin Yuan blew his whistle twice, the waves got bigger, everyone was holding on to the handrails, some of them were pale and looked seasick, Lin Yuan couldn't help thinking: "Shipping experts can still get seasick. "

Lin Yuan blew his whistle again, and the waves gradually stopped. At this moment, Lin Yuan smiled and said, "Now we are going to show you how not to be afraid of the waves."

Lin Yuan pulled down a few switches in the cabin, and there was a "buzzing" sound from below the cabin. After a while, the waves rose again, and this time the waves were bigger. Lin Yuan stretched out four fingers and said: " Sea state four! The wave height is [-] meters!"

But the hull remained motionless!