Datang: Li Shimin begged me to rebel

"1800 tons! This is the limit that can be achieved at present. With our current technology, we can build a giant ship of 2000 tons at most, but the cost performance is not cost-effective. If it is said that the cost of building a ship of 1800 tons is about 4 tons, 2000 tons is just It will rise in a straight line to about 8 yuan per ship, which is the construction cost. The construction time is not included in this.”

“2000吨的船只所使用的工人只要要多100名熟练工人，300名辅助工人，而且时间至少要比1800吨的船只多2个月。”宇文林给出了一个大概的答案。

Li Ke nodded silently. The ship is not just big enough. In fact, a ship with a displacement of 1800 tons is already a giant in this era. An absolute giant, no country can currently build one. A ship of this size.

"You can just think about it. Cost performance is very important. If possible, you can find a suitable tonnage and start building directly on a large scale." Li Ke nodded and said.

"In fact, the displacement of 1200 tons is not bad, whether it is the construction time or the cost required." Yu Wenlin said.

"Then mainly build 1200-ton ships." Li Ke issued an order decisively, not to mention 1800 tons, even 1200 tons is enough.

Because the 1200-ton Yu Wenlin refers to the no-load displacement, if it is a modern design, the wooden ship with no-load displacement will exceed its own weight regardless of the strength of its own hull material. It is estimated that it will run to 3000 tons when fully loaded ( The author did not study ship design, but only understands the principles of physics. Don’t be fooled. The load of a modern professional freighter can exceed its own weight, and the volume of a normal-designed wooden ship with the same displacement must exceed that of a steel ship.).

But now this ship is definitely impossible, because its volume limits the amount of cargo it can load.But professional warships are definitely different from cargo ships. Yu Wenlin has already been exposed to modern shipbuilding knowledge. Although he is slow to learn, he already knows that the weight of cargo that can be carried by different cabin arrangements of the ship is naturally different.

"Yes." Yu Wenlin readily agreed.

"How many ships can we build at one time at the moment?"

"At present, the number of docks has been expanded to thirteen, and thirteen ships can be built at one time, but the number of skilled workers is small and needs to be trained. It will take at least two to three years to achieve maximum production."

"How many apprentices have you trained? Can they keep up with your progress?" Li Ke looked at him and asked.

"Actually, quite a few. My two sons and two nephews are fine. They entered Yuelai Trading Company to study since they were young. They have learned mathematics and other cultures since they were young. As for ships, they have been studying since last year, Your Highness. The knowledge of ship design they brought over, they are different from people of the old school like me, they have accepted the latest affairs from the beginning, so their thinking is even more flexible than mine.”

"To tell the truth, Your Highness, they have given me a lot of inspiration in the latest ship design." Yu Wenlin pointed to his head and said.

"Very good, if that's the case, you will go with us this time to Hudu (a fishing tool in the Jin Dynasty) Dudu (the place where the river enters the sea is called Dudu, so Shanghai in the Tang Dynasty called it Hudu, and Houhu gradually evolved Chenghu, now referred to as Hu. In Shanghai, a Shanghai town was established in the third year of Xianchun in the Southern Song Dynasty), and a large shipyard and shipbuilding base was also established there, and the relevant personnel and equipment have already been in place in advance." Li Ke said.

"Well, Your Highness, can't you let other people go? I don't need me to build a new dock base from scratch. The most important thing in this situation is the ability to organize and dispatch. I am good at researching ship capabilities. I recommend one person. Lu Tang. It just so happens that he comes from the Lu family in Wu County, and he is currently in charge of the logistics organization here, and he has done a very good job in this regard." Yu Wenlin frowned, obviously he didn't want to move.

Li Ke thought for a while, "It's okay, you can go there after the dock over there is built."

"Okay. I don't want to stop my own research on the ship. There will be no problem after it is built." Yu Wenlin nodded.

"By the way, I brought a few doctors with me this time, and a hundred sets of "Barefoot Doctor's Handbook". I will let that Lutang select suitable personnel for them to study in a while. Places with a lot of personnel are prone to epidemics, although It may not be a plague, but we must pay attention to it." Li Ke said.

"Yes!" Yu Wenlin was unambiguous about this aspect. Most of the people were sick, and the shipbuilding would stop. He didn't want to stop the shipbuilding.

After building with Yu Wenlin here, Li Ke quickly returned to the ship, but this time he went to the Qinwang, the name of the ship had already been written on the side of the ship, Li Ke was a little helpless, to be honest, he made a ship. He really doesn't know about this ship.

When Li Ke came up, all Changle and the others had already boarded the ship. The entire Qinwang was 107 meters long, the deck was 14.8 meters wide, the waterline was 3.2 meters deep, and the empty displacement was 1800 tons, and the full load displacement was 2800 tons. tons, with a full load draft of 4.5 meters.The necessary crew for the whole ship is 80 people, and the maximum number of passengers is 600.

With a full load of 600 people and a full load of materials, the sustainable self-sustained voyage time is about 45 days.To reach this time, the design is already very outstanding, the fresh water storage device, the rainwater collection device, and even the device for distilling seawater to collect fresh water inside, but the method of distillation is an emergency.

The most lacking thing in ancient voyages is the problem of fresh water, so most of the ancient ships almost moved along the coastline, even if they crossed the strait, they could not take too long at most.

Of course, the reason why there are so few people fully loaded is because this ship was designed for Li Ke. Many cabins inside are not luxurious, but they are stronger than ordinary troop carriers.

For example, if a troop carrier with an empty load of 1200 tons can only maintain a self-sustained voyage of about ten days, the maximum number of members it can design can reach 1000 people. If it is equipped with a supply ship, it can accommodate 1500 people.Of course, don't expect good conditions. The conditions of modern ships are not very good, let alone ancient times.

Besides, in ancient times, they would not spend a long time at sea, and they would stop at the shore every once in a while to find supplies, especially fresh water resources.

Li Ke and the others will not stay here for too long, and they will leave soon after the belongings of Li Ke and others are transferred to the King of Qin.

In the early morning of the next day, the entire fleet was replenished. With a low sound of the trumpet, the fleet left the port again. There are 10 other ships with a displacement of about 1800 tons, and the rest are about 1200 tons.

However, these ships have been modified with modern sail layouts, not just the triangular sails, or in other words, the triangular sails are only part of the bow.