Yun Lan listened to Lin Yuan's words, stopped crying, and asked suspiciously, "Really?" ”

Lin Yuan smiled: "Of course, why should I lie to you?" ”

Tang Fan and Yun Lan were very happy, Lin Yuan said: "You eat slowly, I'll go first, by the way, Reporter Tang, when you separate, remember where she lives clearly." ”

This time, neither of them kept Lin Yuan, Lin Yuan left the restaurant, and along the way, he saw many Japanese people marching in the streets, with banners that read: "Refuse to negotiate!" Beat the people of China to their knees! "Down with the corrupt officials who negotiate!"

Lin Yuan walked around them and walked quickly back to his residence. As soon as he came back, he said that Tang Fan had nothing to do, so that everyone could rest assured, Shen Wanqing said: "I recorded it for you, when will you listen to it?" ”

Lin Yuan smiled: "Of course it's now." As he spoke, he took the headphones in her hand and began to listen.

An old voice sounded, and Lin Yuan guessed that this person should be a professor, and he said, "Your Excellency, this is the picture of the mysterious ship you gave us. When Lin Yuan heard this, he thought, "It seems that this mysterious ship should refer to our aircraft carrier." ”

The voice said: "In this photo, there is the Yoshino ship of our United Fleet in the distance, according to the distance between the Yoshino ship and the mysterious ship you told us, we can calculate that the length of the mysterious ship is about 340 meters, the width is about 40 meters, the height of the freeboard is about 12 meters, and the estimated displacement should be about 50,000 tons. ”

Lin Yuan thought to himself: "With the shape data of known objects and the distance from known objects to unknown objects, it is easy to calculate the shape data of unknown objects, but how can you not capture the scene below the waterline on the photo, the ghost knows how to calculate their water discharge." ”

Ito added: "This mysterious ship is very fast, according to the estimation of my observers, it has reached a speed of at least 30 knots when evading our artillery fire. ”

Another old man's voice rang out: "Verse 30, how is this possible!" Based on the mass of 50,000 tons and the speed of 30 knots, Its kinetic energy will be 6.4 times 10 to the ninth power joules, we all know that the ship in the process of travel by a lot of resistance, such as the wave resistance and the friction resistance of the water in the boundary layer, these resistance are proportional to the high power of the ship's speed, of which the wave resistance is proportional to the speed of the 4 to 6 power, then we can estimate that the whole ship needs to supply energy 2 times 10 to the tenth joules to maintain this speed, a ton of standard coal can release 30 megajoules of heat, the ship will burn 15,000 tons of standard coal in one second, if you consider the incomplete combustion of coal, its actual consumption of coal will be much greater than this number, which is absolutely impossible。 ”

Ito said, "Isn't it possible for them to burn something else? ”

"Impossible, only oil has a higher calorific value than coal, but how can oil be used as fuel for ships?"

In Lin Yuan's time, it was common knowledge for warships to use oil as fuel, and ships in the 19th century used coal as fuel.

Then there was a silence, and a voice said: "Your Excellency, I don't mean to offend, is there anything wrong with this photo, this battleship is too long, we all know that the gravity and density of each part of the ship cannot all be the same, so if the parts are not connected, they will be in different positions in the vertical direction, in fact, the battleship cannot have such a state, so the bracket of the battleship keel will withstand a lot of force, and this battleship weighs so much, I wonder what material is used for its keel? ”

Ito asked, "What do you mean?" ”

"This kind of load-bearing parts can only be made of steel, and its yield strength will be more than 400 megapascals, according to the current progress of material science in various countries, no country can do the smelting level."

Another voice said: "I don't know where this ship was built, with a displacement of 50,000 tons, if you want to build such a ship, you must build a dock that can build such a large ship, and this kind of big project is impossible to keep secret anywhere." ”

After a long silence, Ito Yohyung sighed and said, "Let's put aside the problem of the ship for a moment, and then talk about the things that can fly, let's call them flying machines, according to the opinions of the experts, how do these things fly?" ”

A voice said, "This kind of thing really appeared!" According to our intelligence, the French have been secretly developing this flying machine, and there is a machine called Clement? In 1890, Adel's engineer flew an airplane fifty meters above the ground, a matter that few people know about because the French military has kept the matter a secret. This plane is powered by a steam engine and the propeller is the propeller, but the aircraft in this picture does not have a propeller in sight! ”

The J-24 uses a small bypass ratio turbofan engine, which of course does not require a propeller.

A voice said, "Since there is no propeller, then it may use a propulsion method that we don't know, such as the one our project team is working on, using air for propulsion." We all know the momentum theorem, if the plane is spewing a high-velocity air flow backwards, then the plane will have a forward velocity, plus the wings provide lift, so that the plane can fly. ”

Ito asked, "How is your research progressing?" ”

The voice said: "If you want the air to circulate and do work, you must pressurize it, and then heat it after pressurization, and then let the air expand, this process seems simple, but it is difficult, we all know that the fan can fan the air, so we want to use a series of fan-like blades to rotate, so that the air can be pressurized, but these blades are too difficult to do, first of all, the shape, to determine its shape, you need to calculate according to the hydrodynamic properties, so that the blades can drive the air, To do work on air, if you want to calculate the properties of fluid dynamics, you must use the Navier-Stokes equation, that is, the N-S equation, but this equation is a nonlinear partial differential equation, and there is no way to find the exact solution, so you can only retreat to the second and find the numerical solution, but this workload is too great to calculate until the end of the world. The second is that even if the shape is calculated, it can't be processed, through our simplified calculation, this kind of blade must be twisted, this kind of blade, the machine tool is not able to process, and it is more difficult to pass the casting method than to ascend to the sky! ”

Ito Yuhyung let out a long sigh and said, "Alas, let's stop here today, let's continue the discussion tomorrow." The meeting ended with a sigh.

Lin Yuan put down his headphones, he couldn't help but worry in his heart, he thought: "Our aircraft carrier has far surpassed this era, once the aircraft carrier has a problem that needs to be returned to the factory for maintenance, where should we go?" When the treaty is signed, we must develop our own industry, and when we are done, we will turn the whole of Japan into a province of China! ”

At this time, Lin Yuan heard his stomach "growling" a few times, and then he remembered that he hadn't eaten yet, and then Shen Wanqing smiled and said, "Hehe, our genius captain will also be hungry?" ”

Lin Yuan only noticed at this time that Shen Wanqing had been by his side all along, and he smiled and said, "You've been waiting?" ”

Shen Wanqing smiled: "How can I not watch from the sidelines, what if you break my equipment?" After saying that, he walked out of the house with a smile, and soon brought in a large plate, put it on the table, and said, "It's all your fault, I had to listen to it just now, so I didn't even eat." ”

Lin Yuan looked at her coquettish appearance, his heart was itching, and he couldn't help but joke: "Why don't we eat together, it just so happens that I'm hungry too." ”

Lin Yuan didn't care whether she agreed or not, sat directly at the table, and saw Shen Wanqing take two dishes and chopsticks, as if she felt something in her heart, Shen Wanqing opened the plate covering the vegetable bowl and took it away, and a tempting puffer fish was revealed.

Shen Wanqing filled the rice, soaked the fish soup into the rice, and ate it, Lin Yuan asked, "What is this?" ”

She smiled and said, "This is a puffer fish, haven't you eaten it?" My favorite food is what my mom used to make for me. ”

Lin Yuan jokingly asked, "Do you still have a mother?" ”

Shen Wanqing laughed so much that she squirted out the rice in her mouth and said, "Why can't I have a mother?" ”

Lin Yuan smiled: "Should all of you agents be orphans?" Do this without worry! Sacrifice your life for the country at any time! ”

Shen Wanqing smiled disdainfully and said, "You must have read too many online novels!" How can there be such an agent, I have never seen it anyway. ”

Lin Yuan said: "Look at us now, go back to the past to fight devils, this is simply something that only exists in online novels, I wonder if there is a writer in Lu Dao who will think of this story?" ”

The two of them laughed for a while, Lin Yuan became serious and said, "I have a fancy for a girl." ”

When Shen Wanqing heard this, she was inexplicably jealous, and said angrily: "What did you say? ”