Hong Tao actually didn't even want a partition board, and the waterproof compartment technology was not suitable for warships. It divides the bilge into many separate spaces, which increases the sinking resistance, but limits the space of the bilge. The reason why many warships in later generations also had waterproof compartments was because later generations had waterproof door technology, which could pass between compartments when needed, but this technology could not be obtained, and there was no rubber available.

Will the reduction of partition panels make the ship less safe? No, encrypting the ribs and the boat board is equivalent to assigning the function of the partition plate to the ribs and the boat board, which is a completely different design idea between the two ideas. One is a thin keel and thin ribs, with partition plates to improve the ship's anti-sinking performance; One is a hollow structure with large keels, thick ribs, and thick ship plates, which enhances the sinking resistance of the ship by strengthening the strength of the outer structure. Both design ideas have their own advantages and disadvantages, but they are different for different purposes.

The structure of this kind of ship in the Great Song Dynasty is low-cost, easy to build, and has more safety redundancy under normal sea conditions. However, it does not have a solid shell, and its resistance to high winds and waves and blows is weak, making it suitable for offshore merchant ships. The structure of Hongtao is more like a European sail warship in the 19th century, there is no waterproof compartment, only a solid shell to resist big waves and shelling, no leakage is not leakage, small leakage can rely on the overall buoyancy of the ship to insist, the big leak is not cured, wait for the shipwreck.

Can the ship be made into a structure that has both a sturdy shell and a waterproof compartment? Yes! But after it is built, it can't run without high-power drive equipment. The massive battleships of World War I and World War II were designed to do both, and it didn't work in the age of sails, which didn't have that much of a driving force, so you had to choose one or the other. If you want the outer layer to be strong, there is no compartment, and if you want the compartment, there is no solid outer layer, if you have to take care of both, you basically can't run, a boat without speed, Hong Tao will definitely not want it, it is a living coffin, no matter how strong it is, it is useless.

"Little three! Work...... I'd like to see what this ship looks like! "Wen Lao Er is more energetic, he still doesn't think what Hong Tao said is right, but he can't fight Hong Tao's mouth, he can only use facts as the basis, it's useless to say too much, after the ship is built, it's all clear who is right and who is wrong.

"There's another thing I have to talk to you about, Wimber, it's this rudder, it's too heavy, it's hard to turn in the wind and waves. I've come up with a solution, and you don't think it's going to work. Let's drill a few holes in the tail rudder to reduce the resistance of the rudder, so that the rotation should not be so heavy, and it will not affect the steering, which is nothing more than two more turns. "Hong Tao has not given up, in the technical issues must be one two two, sloppy, it is himself who drives the boat out, and he has to be more serious.

"It's up to you!" Wen Lao Er is a little angry, he is an old shipwright, or an old shipwright who is a little famous in the Tan family, he usually educates others, but now he is suddenly educated by a foreign boy, even if he has a plan, he can't fully adapt to it in a short time.

Hong Tao didn't have time to make everyone feel comfortable, and he had to go to Zhenzhou City to find a goldsmith to order a sextant, and by the way, the error on the test sample was reduced. As for whether the goldsmiths of this era can meet their own requirements, Hong Tao feels that they must be able to, at least they are more reliable than their own craftsmanship. It's a pity that this batch of sextants doesn't have enough crystal pieces to use as mirrors, and they can't be completed before this trip to sea, so it's good to be able to get the samples back completely.

"Brother Hong, I heard that you went to Guangzhou a few days ago? Why didn't you go ashore to our ...... Take a look at the company? I've always been in Guangzhou! Luo Youde is like having radio communication with Luo Dacai, Hong Tao just came back 2 days ago, his boat came, and he was surprised when he met.

"I'm not going to Guangzhou, I'm just going to take a look around the nearby sea and draw my charts by the way. Since Lao Luo, you asked, it just so happens that I also have good news for you. In two or three months, I will send you someone to be the navigator, and in the future, your ship will not have to take the old route, and you can save about a day by going directly to Guangzhou from here. "Hong Tao has already drawn the sea chart from Hainan Island to Guangzhou, and since it has come out, it has to be put to use, and it is most suitable for Luo Youde's merchant ship.

"Brother Hong can also make nautical charts!" Luo Youde almost stretched out his hand to ask for it, for a maritime merchant, there is nothing more expensive than the word nautical chart, a new nautical chart means a new route, which also means a bunch of small money.

"I'm afraid my Nautical Song people won't use it, wait until I teach my apprentice and let him go to your ship as a navigator, there is no rule on your ship that doesn't let the Tan family get on board, right?" Hong Tao is not worried that someone will plagiarize his own charts, there is no angle and latitude comparison table made by himself, even if they dig out the navigator's brain, it is useless, whether they can use it or not, this is called a technology monopoly, which cannot be cracked.

"Nope! No! As a brother, he must treat each other politely and never let him be wronged! In fact, even if there is, Luo Youde will say no. If there is no nautical chart from Zhenzhou to Guangzhou, he can run himself, but since Hong Tao can draw the nautical chart here, he will definitely be able to draw other sea areas, and this benefit is great.

"That's good, if you look at the salary, you will be regarded as employment. By the way, there's one more thing I want to ask you Brother Luo. I also need crystals, not too big, preferably flaked, with a relatively high purity...... It's relatively clean and transparent! I'll give you a look, I'll do this. Hong Tao took out the simple telescope on the sextant from his pocket and handed it to Luo Youde.

"This is ......" Luo Youde looked at the small cylinder in his hand, not knowing why.

"Put this head on your eyes and look at Zhenzhou......" Hong Tao gestured with his hand to a cylinder and put it on his eyes.

"Oops...... What kind of demon is this, I'm a little dizzy! Luo Youde did not hesitate, immediately put on the telescope, and quickly took it down again.

"Close one eye, then twist the cylinder and count when you see clearly." Hong Tao is happy, he likes to see other people's bad luck.

"Shhh...... This is...... No way? This is Zhenzhou City! I saw Zhenhai Tower! Luo Youde put the telescope on his eyes again according to Hong Tao's words, and then began to twist the eyepiece to adjust the focus. Soon, he saw clearly, and at first he didn't believe it, so he took the telescope off and looked at it with the naked eye, and then held it up, and then realized that what he was seeing was real.

"The crystal piece is used for this, it should have been made of glass, but unfortunately I can't burn the glass now, and there is a raw material that Da Song can't find. But don't worry, I'll find it sooner or later, and until then, I'll have to use crystal tablets instead. You help me find more crystal pieces, and I'll give you one of these games, although it doesn't have much effect on navigation, but when the weather is good, this thing can see far away. Whether there are pirates on the surface of the sea, whether there are reefs or not, you can see a little in advance. By the way, Lao Luo, have you ever encountered pirates? A few days ago, I saw with my own eyes a group of pirates robbing merchant ships on a small island outside of Guangzhou. Hong Tao was talking about the telescope, and suddenly remembered another thing. Luo Youde is currently the only medium he has in contact with the outside world, and he is also very temperamental, greedy but not interested, so it is necessary for him to remind him to pay attention to safety.

"That's not a pirate, it's ...... It's the Tan people, just like them! One moment it's a fisherman, and the other time it's a pirate, very vicious, not only robbing boats but also killing people! In the past, it was hard to say anything for my brother, but now that you have mentioned it, you still have to advise Brother Hong for your brother, you must be careful of them! The state capitals are very taboo against the Tan people, mainly because they are afraid that they will gather to make trouble, and they will not have a family business, which is not safe! As soon as Luo Youde said a beginning, he lowered his voice and looked around as he spoke.

"Well, Brother Luo, this little brother of the heart, has received it, but don't worry, these Tan people won't do that kind of thing. You wonder, if those pirates could produce this sesame oil and sell it, would they still be pirates with their heads in their hands? It's not that they were born wanting to be pirates, it's that they really can't live, and if they don't rob others, they will starve to death. Hong Tao doesn't care what others think, he himself regards himself as a Tan people, so he naturally wants to say two fair words for the Tan people.

"yes...... Alas...... Brother Hong don't worry about me, the people who rob are all foreign merchants, and they don't rob the local boats, which annoys the Coast Guard Camp and will drive them away, not even fishing. They don't rob a big ship like me, there are too many men with weapons on board. Those robbed ships were all targeted on the shore, and they were only murdered when they went to sea after they were found out. Hong Tao is right, this is not only the fault of the Tan people, it is not the Tan people who provide them with the news, and it is not the Tan people who collect the proceeds of their robbery, it is the merchants in the city, the people's hearts are not ancient! "Luo Youde seems to know these pirates very well, and he is quite confident in his own safety. His ship is indeed not something that a few people or a dozen people can grab, this ship is not a pure merchant ship, it is more like a warship of the Great Song Dynasty Sailors, the ability to load goods is not very strong, but there are a lot of people on it.

"I'm relieved, I'm going to go to sea tomorrow to catch another whale and come back, this batch of sesame oil is the last stock. I estimate that it will take at least 5 to 10 days to come back, Uncle Cai has already prepared the big pottery urn I want, if the whaling goes well this time, I will make you a new goods to sell, there is a great possibility of success, wait for my good news. Since Luo Youde has a spectrum in his heart, Hong Tao is not worried about his safety. In fact, sea merchants like them who often run south are basically no different from pirates, and they may be able to do a ticket when they encounter a lone ship, and killing people and goods is not a big problem for them, otherwise what is the use of raising so many young and middle-aged sailors on the ship, and with weapons?

"That's very good, I'll go and settle the accounts for this issue with Fu Bo first, and then I'll go back to Guangzhou to find crystal tablets for Brother Hong...... You father-in-law, it's really hard to deal with, plus your godfather, they shouldn't be fishermen, they should go to our company to be shopkeepers, and they won't miss a penny! Luo Youde was very happy when he heard that there were new goods to sell again, and he joked with Hong Tao, and even talked about Hong Tao's elders, which is very taboo in the Great Song Dynasty, unless it is a person who has a good relationship.

"Take care of it, the old man is afraid of being poor, he will grab a little money and not let go, and in the future, I hope that Brother Luo will give me more advice." Hong Tao didn't pay attention to it, this is a kind of temptation between friends, a way to distinguish the depth of friendship, and it can be regarded as a kind of show of goodwill.

"Guidance...... Hahahaha...... I don't dare! Don't pass ...... first" Luo Youde was relieved when he saw that Hong Tao was not displeased, he instinctively felt that his friendship with Hong Tao was one step deeper, and he smiled and went to find Bo Fu and Chen Mingen. As everyone knows, his way of dealing with the world is too primitive, and it doesn't work for Hong Tao, a person who has been educated by later generations to lose any humanity. Or that he is too pure, that's right, he is pure, a person like him can mix well in the Great Song Dynasty, if he is also allowed to travel to the afterlife, he can be pitted by others.

PS: Clicks, Collections, Recommended Tickets! Sanjiang ticket threw it to Hong Papi hard...... I don't know if there are any book friends who don't know how to vote for Sanjiang, I write out the method of voting for Sanjiang here, and the collective method is as follows: 1. The computer opens the starting point website, clicks on Sanjiang, and enters the Sanjiang homepage (mobile phone users please use their mobile phones to search for Baidu on their mobile phones: starting point Sanjiang, pull to the bottom after entering, click on the computer version), after entering the lower right corner of the Sanjiang Dafeng push, you can see a Sanjiang ticket to receive a few words, click to receive, after receiving it, you can pull the web page to the bottom, and see that there is a voting label behind "Southern Song Dynasty does not cough". and click Vote. 2. The use time of Sanjiang ticket is from 14:00 in the afternoon to 14:00 in the afternoon of the next day, each account can only vote once in this 24 hours, and it is invalid when it is outdated, so please vote directly for "Southern Song Dynasty No Cough" after receiving it, this vote can not be accumulated, one vote a day for one account, as long as it is an account that consumes more than 1 yuan, you can vote. I hope that book friends will work hard and vote for Sanjiang.