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

And in fact, he is right, the construction of ships is not taken for granted, it is not that you can build as big as you want, otherwise why should everyone be bigger than this ship?

In fact, everyone vaguely felt that Hu Lu's words were right, and this Hu Lu was very sure of what he said, and he was full of confidence in front of everyone, so many people began to be suspicious.

For example, the envoys of the vassal kingdoms who have always seen the wind and steered the rudder showed a suspicious look at this time.

The rest of the people had different complexions, each with its own merits. Zhu Di couldn't help frowning, he didn't believe that Hao Fenglou was bullying the king, but he was very angry with this hateful Hu Lu.

Hu Lu smiled and continued: "The key to shipbuilding is to lay the keel, this dragon backbone is the firmness of the whole ship, and the keel is laid with solid wood, but wood has its limit after all, the bigger it is spread, the more joints there are, and the more joints there are......"

He said that the shipbuilding problem is very detailed, and extremely accurate, the keel is indeed related to the ability of the whole ship to resist the storm, and with today's technical level, these wooden keels are limited after all, the problem is mainly two aspects, one is that the larger the ship, the larger the keel, so it needs more wood spliced together, the more splicing, the more problems that may arise, after all, there is no seamless docking technology in this era, one more splicing, the lower the reliability of the keel.

As for the second problem, it is the material, even if it is strong wood, it is still wood after all, if it is only a small area of wood spliced together. It may still be strong, but the bigger it gets. The greater the power to withstand the wind and waves at sea, so in a sense, the big treasure ship brought by Hao Fenglou is so huge, once it encounters a big wave, it will basically fall apart.

A ship like this, if only piloted offshore, sails along the Big 6. It's barely feasible, after all, the wind and waves near the sea are smaller, and the second is that if you encounter strong wind and waves, you can immediately rely on 6 to dodge.

However, Hao Fenglou said that they did not sail along the big 6, and Hu Lu came to the conclusion that such a sea ship. With its structure, it is impossible to sail in the deep sea, its reliability is too low, and its ability to withstand the blows of wind and waves is too low, even if there is no wind and no waves, this thousands of miles of sea travel. I'm afraid it's almost falling apart.

Therefore...... This is not a sea ship at all, or this is simply the collusion between Hao Fenglou and Da Mingzi to build this huge ship near here, and then order someone to drag it to this Longjiang River with a fiber rope.

The envoys of various countries listened carefully to Hu Lu's eloquent talk and saw that he was justified and well-founded. I couldn't help but nod my head, although the facts were in front of me. But this ship is really big and rare, and Hu Lu has a nose and eyes, and it really doesn't look like a fake.

In the end, Hu Lu sneered at Hao Fenglou: "Lord Hao, in fact, if you build a smaller ship, although the subordinates are quite proficient in sea ships, they don't dare to doubt it at will, but you are so happy, it is inevitable that you are too exaggerated, you actually built the ship to such a point, and my Great Food Country has also tried to build such a huge ship, but it has all failed......

Hao Fenglou smiled, but interrupted him: "You mean to say that the problem is in the keel?" ”

Hu Lu said: "Exactly." ”

Hao Fenglou sighed and said, "But what if this keel is not wooden." ”

Hu Lu froze......

It wasn't just him, everyone was stunned.

Everyone has their own cognition, wood shipbuilding is actually everyone's consensus, in addition to using wood to build ships, what else can be used in this world?

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

This was originally just a ridiculous sentence, in his opinion, the young man in front of him was too ridiculous, although the newborn calf is not afraid of tigers, but if he doesn't even have the common sense of shipbuilding, but he is still here to make a lot of nonsense, it can't help but make people feel ridiculous.

It's just that...... He seemed to be underestimating Hao Fenglou's 'ridiculousness', because Hao Fenglou nodded in the next sentence: "Yes, it is a keel made of steel, and its strength is ten times that of wood. ”

Hu Lu's jaw was about to drop, and then he laughed and said, "What did you say? Do you use steel for keels? Ha ha...... Lord Hao, I have heard your name for a long time, and I know that you are a new Ming Dynasty, but now it seems that it is better to be famous than to meet, you really teach me to be disappointed, you don't even understand the common sense of the ship, but you dare to speak so loudly. I only ask you, this steel is the most susceptible to rust and corrosion, and this ship goes to sea, although the steel is wrapped in a wooden hull, but it will still be contaminated with water vapor after all, do you know what will happen if this steel rusts? Once the steel keel is corroded, your ship will immediately fall apart and will fall apart on its own in a matter of months. ”

What Hu Lu said is very reasonable, not to mention iron, even ordinary steel is still not resistant to seawater corrosion, so in this era, no one has ever thought of using steel to make keels, and now, Hao Fenglou actually said such stupid words, it is really ridiculous.

In fact, it's not just Hu Lu who makes fun of Hao Fenglou now, even if those envoys don't know the knowledge of other ships, they always know the terrible thing about the corrosion of steel by the sea, so many people secretly laughed.

Those civil and military officials, some of them were happy in their hearts, and some of them had solemn faces, feeling a little unreasonable, no matter where you Hao Fenglou got the boat from, but you guys said such things, it was really a big loss of the court's dignity, and it was a joke.

Hao Fenglou sighed and said: "What you said is very reasonable, of course, ordinary carbon steel is easy to be corroded by seawater, but you don't know that there is more than one way to make steel, if you add some other raw materials to the steel, you can make it withstand seawater, and after the keel is built, I also ordered someone to brush a layer of paint on this keel, and then ordered someone to wrap it with a tarpaulin, this keel wants to corrode, but I am afraid that it is not easy." ”

Of course, Hao Fenglou doesn't expect these people to believe his words, and he can't announce this seawater-resistant steel formula to the public, which is naturally the killer feature of Daming shipbuilding, once you can use steel to build ships, this is definitely a progress across the times, think about it, if the wooden keel in the past can withstand a hundred catties of force, and the current steel can withstand eight hundred and one catties, this alone, is a leap for the stability and life of a sea ship.

As for seawater-resistant steel, 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 and other metals to the steel, which can make the seawater corrosion resistant. However, Hao Fenglou's memory is not clear, for the low corrosion resistance of carbon steel, in order to improve its corrosion resistance, a small amount of chromium, nickel, phosphorus and other minerals added to the steel mining and refining is also unknown. However, he had a very stupid method, that is, after the construction of the Shenwu Creation Bureau began, he specially organized a group of blacksmiths to let them ponder.

These people are not responsible for any production, all they have to do every day is to smelt all kinds of steel, which involves more than just ordinary carbon steel, Hao Fenglou even encourages them to mine all kinds of ores, and then mix these ores into molten steel, and then record them, such as trying their strength, toughness, and even soaking them in water or seawater to see their corrosion resistance.

These craftsmen have been doing it for many years, I don't know how many times, it seems to be a toss, and it does make the bureau break a lot, but the benefits are also huge, on the one hand, the steelmaking skills have been improved several times under the efforts of this kind of people, and at the same time, all kinds of strange 'special' have just come into being, such as this kind of steel, which is resistant to seawater corrosion, there are several kinds of jù on the side of the bureau, and finally Hao Fenglou decided on the best plan, through guò trial production, and finally used on the keel.

This kind of steel is equivalent to a secret recipe, and now it is in Hao Fenglou's hands, and it acts on the ships produced by the Haiphong Shipyard, which greatly improves the strength of the ships.

Hao Fenglou continued with a smile: "If you don't believe it, Mr. Hu can board the ship to see, in fact, Mr. Hu only thought of corrosion, but he never thought that there is another problem with using steel as keel, steel is heavy, if too much steel is used, it is not easy for the ship to float." After all, steel is heavier than wood, and if ordinary steel is used, this keel is already heavier than a large ship. Of course, this cannot be done with the current steel, so the shipyard in Haiphong has specially designed the keel steel for this purpose, which maximizes the strength of the steel while minimizing the steel. The selection of shipbuilding materials is the most critical, and the ridiculous thing is not me, but you, clinging to the incomplete, and still self-righteous, Mr. Hu, are you dead now? ”

Hu Lu was a little unwilling for a while, but Hao Fenglou's appearance of letting you board the ship to visit made him a little suspicious.

At this time, Hao Fenglou said sharply: "Nasser! Ben Hou's arrival in Beijing today is a happy event, but since you have to bump into it, it just so happens that Ben Hou has a sum here to settle with you. ”

Hu Lu didn't have time to think about it, his face changed, and he said, "How are you doing?" ”

Hao Fenglou sneered: "Dare to ask whose order you are sending this envoy?" Is it your lord, or is it the civil and military official of the Great Food? ”

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

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