First of all, because the cabins are tightly separated from each other, the water does not flow to the other cabins during the voyage, especially on ocean voyages, even if one or two compartments are damaged and water enters. From the overall point of view of the ship, it still maintains considerable buoyancy and does not sink.

Secondly, the ship is divided into cabins, and the loading and unloading and management of goods are more convenient. Different cargo owners can load and pick up goods in individual cabins at the same time, which improves the efficiency of loading and unloading, and is convenient for management. In addition, because the hatch plate is closely connected with the hull plate, it plays the role of reinforcing the hull, which not only increases the transverse strength of the ship as a whole, but also replaces the process of adding ribs, so that the shipbuilding process is simplified.

The watertight compartment structure adopted by Chinese ships has long been appreciated by foreign countries. Marco Polo, an Italian executor of the Yuan Dynasty, gave a detailed description of Chinese ships in his "Travels".

The two of them met at a café. When Liu Pei arrived, Hou Jie had already arrived. Liu Pei recognized Hou Jie at a glance when he entered the door. After all, this person is too distinctive! Young people in their 30s, but they have a problem with losing their heads. There is actually a circle of the Mediterranean Sea on the big head! With his big black-rimmed glasses, it makes people look quite happy.

Hou Jie lifted his glasses and stood up to shake hands with Liu Pei, and said, "Hello, Mr. Liu." I'm Hou Jie. I just arrived. ”

Son, it seems that he did just arrive, because he didn't order anything. Of course, it is also possible that this professor is a little picky. After Liu Pei asked Hou Jie, he called the waiter and ordered two glasses of Blue Mountain.

Liu Pei has never been used to drinking coffee until now. Because he felt that the coffee was too bitter. So he put another sugar cube in the coffee cup, stirred it with a spoon and said, "Professor Hou, don't worry. What I'm saying online is true. I repeat: I need to design sail warships and merchant ships with watertight compartments, as well as ships for other purposes, of all types. And make a disassembleable intuitive model with full drawings. It is necessary to reach the point where a group of people with elementary school education can make it according to drawings and models. I will bear all the material costs. In addition, you will be paid another 500,000. But the time has to be fast, and I have to get things in two months. ”

Liu Pei said: "Is it difficult to design an old-fashioned sailboat like this? You should have eaten all the designs of these ships, right? ”

Liu Pei was taken aback and said, "Why does this need to be redesigned?" I think you have drawings on your computer for these ships, can't you modify them on them? ”

Liu Pei understood the reason, and he said very frustratedly: "I thought it was very easy to design this kind of old-fashioned sailing boat!" It seems that I thought it was too simple! ”

What does this vintage sailboat do? ”

Hou Jie shook his head and said, "Mr. Liu, I can understand your thoughts, but I have to regret to tell you that this is not a matter of money. I'll give you an example. Western ships were designed to favor the placement of deck guns, so the sides of their battleships were densely packed with gun muzzles. But the anti-sinking resistance of their ships is too poor, and once the ship has a hole that cannot be quickly repaired, it is basically settled! The watertight compartments of traditional Chinese ships are very resistant to sinking. Even three or four compartments can be saved if they are flooded together! But the watertight compartment is not suitable for deck guns, so the number of deck guns is much less than that of Western warships of the same tonnage. And when the deck is fired, the deck and other structural parts below are subjected to tremendous impact forces. If it is to make Western ships, we will make them directly according to the drawings. But if we use watertight compartments, we have to calculate how much of the impact of the guns can be withstood by the deck and other components. How many artillery pieces can be arranged? It would take days just to calculate this problem! Moreover, after each problem is solved, another problem immediately arises. After all, it's a completely new design, and there's no data to draw on. It takes time to get it all done! ”

Hou Jie replied categorically: "Absolutely impossible! It's really not a project that can be completed in a short period of time. ”

Liu Pei was in a daze for a while before raising his head and said, "Professor Hou, you are a great expert in ship design, so can you talk about the comparison between Western ships in the Age of Discovery." What type of boat is best to use? ”

For mobile phone users, please browse Reading, a better reading experience, and the bookshelf is synchronized with the computer version.