Hu Lu's words are very professional, and what is involved in shipbuilding knowledge is involved.

In fact, his words are correct. The construction of a ship is not a matter of course. It does not mean that you can build as big as you want. Otherwise, why do you need to compare the size of this ship?

In fact, everyone vaguely felt that Hu Lu was right, and Hu Lu was very confident and full of confidence in front of everyone, so many people began to suspicion.

For example, those envoys from the vassal states who have always changed their minds showed suspicion at this time.

The other people had different expressions and had their own merits. Zhu Di couldn't help but frown. He didn't believe that Hao Fenglou was bullying the emperor, but was very angry at the hateful Hu Lu.

Hu Lu smiled and continued: "The first priority is to lay keel bones. This keel bone is to connect the firmness of the entire ship. The keel bones are laid with solid wood, but the wood has its limit after all. The larger the spread, the more joints there will be, and the more joints there..."

The shipbuilding problem he mentioned is very detailed and accurate. The keel is indeed related to the entire ship's ability to resist storms. With the current technical level, these wooden keels have limited ability after all. The main problems are two aspects. One is that the bigger the ship, the larger the keels will be. Therefore, more wood is needed to be spliced ​​together. The more spliced, the more problems may arise. After all, there is no seamless technology in this era. If one splicing is once, the lower the reliability of the keel.

As for the second problem, the material is used. Even if the wood is strong, it is still wood after all. If it is just a small area of ​​wood splicing together, it may still be strong, but the bigger it is. The greater the power of enduring wind and waves at sea, so in a sense, the treasure ship brought by Hao Fenglou is so huge that once it encounters big waves, it will basically fall apart.

If a ship like this is just driving near the sea and sailing along the mainland, it is barely feasible. After all, the wind and waves in the near the sea are smaller. Secondly, if you encounter strong wind and waves, you can immediately rely on the land to hide.

But Hao Fenglou said that they did not sail along the mainland. Hu Lu concluded that such a sea ship would never be able to navigate in the deep sea with its structure. Its reliability is too low and its ability to withstand wind and waves is too low. Even if there is no wind or wave, the thousands of miles of sea road will probably fall apart.

Therefore... this is not a sea ship at all, or it is the fact that Hao Fenglou and the Emperor of Ming colluded with each other to build this huge ship nearby, and then ordered people to drag it to Longjiang with a rope.

The envoys from various countries listened carefully to Hu Lu's talk. Seeing that he was right and well-founded, they couldn't help but nod. Although the facts were in front of him, this ship was really rare, and Hu Lu had a nose and eyes, and it was indeed not like a fake.

At the end, Hu Lu sneered at Hao Fenglou: "Mr. Hao, if you actually build a smaller ship, although you are quite proficient in sea ships, you dare not doubt it casually. But you are so happy about merit, which is too exaggerated. You have actually built the ship to such a level. My country of Great Food has also tried to build such a giant ship, but they all ended in failure..."

Hao Fenglou smiled, but interrupted him and said, "You mean, the problem is with the keel?"

Hu Lu said seriously: "That's right."

Hao Fenglou sighed and said, "But what if this dragon bone was not made of wooden."

Hu Lu was stunned...

Not only him, everyone was stunned.

Everyone has their own understanding. Wooden shipbuilding is actually everyone’s consensus. What else can be used in this world besides using wood to build shipbuilding?

Hu Lu said lightly: "If you don't use wood, can you use steel?"

This was just a ridiculous saying. In his opinion, the young man in front of him was too ridiculous. Although a newborn calf was not afraid of a tiger, if he didn't even have the common sense of building a ship, he still made a lot of talk here, which made people feel ridiculous.

But... he seemed to be too underestimating Hao Fenglou's 'ridiculous', because Hao Fenglou nodded in a sentence: "Yes, it is a keel made of steel, which is ten times stronger than wood. With such a strength, even if it is a big ship, it can be safe at sea even if it is bigger."

Hu Lu's chin was about to fall off, and then he laughed and said, "What did you say? You use steel as a keel? Haha... Lord Hao, I have heard of your name for a long time and know that you are a newcomer to the Ming Dynasty, but now it seems that being famous is worse than meeting. You are really disappointed. You don't even understand the common sense of the ship, but you still dare to be so arrogant. I just ask you, this steel is the most likely to rust and corrode. When the ship goes into the sea, although the steel is wrapped in the wooden hull, it will still be contaminated by water vapor after all. Do you know what will happen to this steel rust? Once the keel of the steel is corroded, your ship will collapse immediately and will fall apart in a few months."

What Hu Lu said is very reasonable. Not to mention iron, even ordinary steel is still not resistant to seawater corrosion. Therefore, no one in this era had ever thought of using steel to make keels. Now, it is ridiculous that Hao Fenglou actually said such a foolish thing.

In fact, it is not just Hu Lu who makes fun of Hao Fenglou now. Even if those envoys do not understand other ship knowledge, they always know the terrible thing about the sea water corroding steel, so many people laughed secretly.

Some of the civil and military officials were secretly happy, while others looked solemn, feeling a little out of character. No matter where you got the boat from Hao Fenglou, you, a guy, would really be a big loss of the court's dignity and make people laugh at it if you said such words.

Hao Fenglou sighed and said, "What you said makes sense. Of course, ordinary carbon steel is easily corroded by sea water, but you don't know that the method of steelmaking in this world is not just one. If you add some other raw materials to the steel, it can withstand sea water. Moreover, after the keel is built, I ordered someone to apply a layer of paint on the keel and then ask someone to wrap it tightly with an oil cloth. If the keel wants to corrode, it is probably not easy."

Of course, Hao Fenglou did not expect these people to believe his words. He would not be able to publish this kind of seawater-resistant steel formula to the public. This is naturally the killer weapon of shipbuilding in the Ming Dynasty. Once steel can be used to build ships, it is definitely an advancement across the times. Think about it, if the wooden keel in the past could withstand a hundred kilograms of force, but today's steel can withstand 81,000 kilograms, this alone would be a leap for the stability and lifespan of a sea ship.

As for the steel that is resistant to seawater, Hao Fenglou knows a little. The corrosion resistance of carbon steel is low. In order to improve its corrosion resistance, later generations added a small amount of chromium, nickel, phosphorus, copper, aluminum, molybdenum and manganese to steel to make the seawater corrosion resistance just now. However, Hao Fenglou's memory is not clear. The corrosion resistance of carbon steel is low. In order to improve its corrosion resistance, the mining and refining of a small amount of chromium, nickel, phosphorus and other minerals in the steel is unknown. However, he had a very stupid method, that is, after the Shenwu Construction Bureau started construction, he specially organized a group of blacksmiths to let them think about it.

These people are not responsible for any production. What they have to do every day is to conduct various steel smelting experiments. What is involved is not only ordinary carbon steel. Hao Fenglou even encourages them to mine various ores, then mix these ores into the molten steel, and then record data, such as trying their strength and toughness, or even soaking them in water or seawater to see their corrosion resistance.

These craftsmen have tried for many years and I don’t know how many times they have tried. They seem to be a toss and it has indeed cost a lot of money to make the work, but the benefits are also huge. On the one hand, the steelmaking skills have been improved several times with the efforts of such people. At the same time, various strange "special" have just emerged, such as this kind of corrosion-resistant steel, and there are several data on the work. Finally, Hao Fenglou decided on the best plan, and finally used it on the keel through trial production.

This steel is equivalent to a secret recipe. Now it is held in Hao Fenglou's hands and acts on the ships produced by the Haigong Shipyard, greatly increasing the strength of the ship.

Hao Fenglou continued with a smile: "If you don't believe it, Mr. Hu can board the ship to see it. In fact, Mr. Hu only thought of corrosion, but never thought that there is another problem with using steel as a keel. Steel is heavy. If too much steel is used, the sea boat will not easily float. After all, steel is heavier than wood. If ordinary steel is used, the keel will be heavier than a large ship. When it is launched, how can we load cargo and manpower? With the current steel, of course, we cannot do these. Therefore, the dock in Haiphong has specially designed keel steel for this purpose, which minimizes the steel material and maximizes the strength of the steel. The most important thing in this shipbuilding is not me, but you, who are obsessed with the incompleteness and are self-righteous. Mr. Hu, are you giving up now?"

Hu Lu was a little unwilling for a moment, but Hao Fenglou looked like he was allowed to board the boat to visit, which made him a little suspicious.

At this time, Hao Fenglou said sternly: "Nasel! Now the Japanese Marquis arrives in Beijing, it is a happy event, but since you have to bump into it, I just happened to have a decision here, but I want to calculate with you."

Hu Lu didn't think too much, his face changed and he said, "How are you going?"

Hao Fenglou sneered: "Who is the instructed by you who served this envoy? Is it your lord or a civil and military official who is a great food?"

This situation was so sudden that Hu Lu was a little panicked for a moment: "This..."

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Chapter completed!