I have to say that the addresses of scouts who came up with the investigation are very good, but we still need to choose the best ones.

No matter how the sea ships are built today, there will definitely be no shortage of metal objects on the ship, so you still need to find a place with a fire source.

It is understood that Yuntong County has used a lot of coal, so this factor must also be taken into account, as well as the structure of the land. If it is all sand, it will easily cause collapse.

The hull is huge, and the dock is a large and immovable shelf. Only by relying on such shelf can the ship be perfectly assembled on the shore.

Another thing is also very important. The transportation is convenient. No matter what you need, it can be delivered as soon as possible. That is really perfect.

Whenever you go to sea, there will be a lot of time, and there will be a city next to it to facilitate supply.

Tang Long didn't know that according to the current perfect screening method, the technological tree of the dock actually appeared thousands of years earlier, and the advanced manufacturing technology of ancient sea ships.

The rudder suggested by Zhang Yumeng, the watertight compartment provided by Yang Gan and the keel structure.

The rudder is a device that is installed at the stern and controls the course. Although the rudder is a small device, it can make the huge hull run freely.

The mystery is that if a sailing ship wants to turn left, it must deflect the rudder to the left by an angle, and the water flow will generate a pressure on the rudder surface, that is, the rudder pressure.

The rudder pressure itself is very small, but it is far from the center of rotation of the ship, so the torque to rotate the ship is relatively large, and the bow will turn to the left accordingly.

The emergence of the rudder will rewrite the history of the world's maritime industry and provide key technical conditions for sailors to conduct ocean-going navigation.

The watertight cabin, also known as the watertight cabin, is a safety structural design of the cabin. It is located in the hull and is a number of independent cabins separated by the watertight bulkheads inside the hull.

When a ship encounters an accident, a small part of the cabin is damaged and inflows, other watertight compartments that have not yet been affected can also provide the ship with buoyancy and alleviate the risk of immediate sinking. M.

In addition, watertight compartments can also be planned as multi-purpose spaces, such as occupancy, storing goods, and even placing weapons.

This technology did not appear until the Northern and Southern Dynasties. Yang Gan has made it now, and it can be said that the technology tree on this line has lit up thousands of years in advance.

The stars and seas dare not expect too much, but the future overlord of the sea will definitely be the Central Plains.

As for the structure of the keel, it is quite complicated. Yang Gan only knows one or two types. In fact, keels can be divided into six types from a large classification.

Dragon bone, side dragon bone, rib, dragon tendon, and sturdy dragon bone.

Each type of keel has different effects, such as keel.

It is a longitudinal member connecting the bow column and the stern column in the center of the base of the hull. It mainly bears the longitudinal bending moment of the hull. When making the ship model, you should choose to make rectangular cross-section pine strips with straight wood grain and no joints.

Dragon tendon: Dragon tendon is a longitudinal member on both sides of the hull. It forms a mesh structure with the ribs to fix the side plates of the ship and increase the structural strength of the hull. The dragon tendons of the ship model are usually also made of rectangular pine strips. Production.

These three advanced technologies, even two thousand years later, were still made on this basis.

Don’t doubt the inheritance and learning ability of professionals. Yang Gan and Zhang Yumeng just instilled all the shipbuilding knowledge they knew into Tang Long. In fact, both of them ignored one thing.

The two are indeed not familiar with ancient warships, so many times they use the same set of modern cruise ships for example. After all, even modern warships can only be seen from movies. They have never even touched them.

After a few days of careful consideration, comparison, and screening, Tang Long hurried to Yanggan's mansion with three official documents.

"Justice, after a few days of screening, we found that these three places, whether it is transportation, supplies, woods and venues, are very suitable for building docks."

Tang Long spread three official documents and topographic drawings on the table, and Yang Gan also carefully checked them.

After a long time, Yang Gan breathed a sigh of relief. It seemed that he had found a treasure this time.

Take out a mineral distribution map from the bookshelf and compare it carefully.

After a while, Yang Gan pointed to a document and said, "How about choosing Wanghai County in Haichao County?"

Tang Long nodded and said, "The location here is good. The most important thing is that the transportation is convenient. There are official roads that can directly lead to Haichao County City, and there are no reefs. I just don't know what the minerals are?"

Yang Gan threw the drawings of the known mineral distribution points to him. Not only were there marks on it, but also recorded the current situation of the minerals and the ownership of the property rights.

A smile gradually appeared on Tang Long's face. This place was really perfect. There was almost no place nearby that could be compared with this place.

"Okay, then settle down."

With Yang Gan's order, a large number of slaves, military supervisors, food, and horses began to operate. Of course, this was not a departure, but a whole set up.

There is the place of Haichao County. Although I am the magistrate of Yuntong County, if I want to go to someone else's place, I always have to say hello first.

Yang Gan ordered a hundred men and brought Chrisna, Bailika, Ran Jing and Tang Long to set off.

It's still the same thing. It's not as modern as it was in ancient times. Even if you go to a place hundreds of miles away, if you don't prepare the ceremony and food.

If you want to sleep in the wild, you might even have to hunt. There is no people in a radius of hundreds of miles, so who can bear it?

This time, we prepared a lot, dozens of carriages and supplies, not only with food and grass, but also with a large amount of canned meat and canned fruits.

The weapons and armor that were replaced were not missing, as well as the medicines prepared by Ge Zhao and Ge Xiuming and Yang Gan's secret weapons.

Just as the group was about to set off, a tall and beautiful figure was carrying a weird spear more than two meters long, wearing a sword around her waist, and waiting for everyone at the entrance of the village.

Yang Gan rode behind the rhino and said strangely, "Master? What are you doing?"

"I'm bored here and want to go out for a walk. I heard that you are going to Haichao County, and I want to go see the sea too." Cao Wushuang said lightly.

Yang Gan smiled and said, "Master? Didn't there be any water before Yue Kingdom?"

"How come the State of Yue is located in Kuaiji County, Xingguo. How come there is no water? There is water everywhere. I have never seen the sea before. I heard that the sea water is salty and I want to see it."

Cao Wushuang said, a trace of cunning flashing across his eyes.

Yang Gan shouted to the back, "Come on, get me a good horse."

"No, I'll ride with you."

Before Yang Gan could say anything, Cao Wushuang jumped on the stirrup and sat steadily on the rhino's back.

"This ~ Master, we are not in line with etiquette like this."

Cao Wushuang sat behind him, and immediately made Yang Gan unable to lean on him, which was very uncomfortable.

"Oh, you're still talking about etiquette to me. I think you've never done anything related to etiquette." Cao Wushuang mocked.

Yang Gan's mouth twitched hard, as if he was saying that he had never done anything.

Yang Gan looked back and saw the spear behind Cao Wushuang, which was so cold that it made people feel cold.

"Where did the qian behind you come from? Look at the pattern, it is made of pattern steel." Yang Gan asked casually.

Cao Wushuang reached out and touched his back, and his eyes showed satisfaction. "Zhang Xiaoniang took me to the foundry to create it. It was very sharp. With a light poke, you can pierce the leather armor and put it into the armor."

In the past, Yang Gan thought that this weapon was a gun, but later he learned that this kind of thing similar to a gun was called a turtle.

Of course, there are also other vassal states, but the name is different. Some are called beryllium and some are called pineapple, which is actually a kind of thing.

This weapon is similar to a spear. Its sharp part is like a bronze sword that is wide, but the length of the pole is four meters upwards.

As the saying goes, strong crossbows are in front and turtles are in the back. turtles are such weapons. Of course, there are also some that make two curved branches at the sword grid to block them. This is called a turtle.

The spear used by Yang Gan is very sharp, and its main nature is armor-breaking. Cao Wushuang's turtle is obviously customized, otherwise this kind of weapon would not be less than four meters.

The length of more than two meters can be applied to daily life, which can satisfy both horse battles and infantry battles, just right for Cao Wushuang's state at this time.

Yang Gan sometimes has obsessive-compulsive disorder and likes soldiers to use weapons of uniform specifications. The turtle is the turtle, the turtle is the turtle, the turtle is the turtle, the turtle is the turtle, the turtle is the turtle, the turtle is the turtle, and the turtle is the turtle.

Unfortunately, the Central Plains have always been complicated by weapons and the specifications of heavy crossbows are uneven. These are already improving. The border troops have always had good combat power, but their equipment is backward and they have gradually begun to eliminate bronze ware.

Yang Gan asked last time that the equipment of the Central Military Army was all iron tools. Damn, what I left for himself was garbage.

After all the equipment in the army is replaced, the bronze can be pulled out and made into various tripods. It is quite troublesome to separate the main metals.

"I think you are crazy, spending so many slaves, food, and money just to fight Goguryeo."

Cao Wushuang never expected that Yang Gan would decide on a big battle so hasty.

Yang Gan looked helpless and really wanted to kick Cao Wushuang down. The comfortable single-person custom-made rhino saddle is just one person comfortable, and two people...

"Oh, master, why don't I call a BMW? How about you change the BMW? It's really uncomfortable for both of you to sit."

One arm reached under Yang Gan's neck, and before he could react, he exerted force.

"Ah!! Master, Master, you, you are going to strangle me to death." Yang Gan's face turned red immediately.

"What? You feel uncomfortable sitting with me?" Cao Wushuang gradually let go of his arm.

Cao Wushuang's arms and thighs were as creamy as the skin, but when using force, the muscles were in a state of drawing thread. Sometimes Yang Gan was really afraid, so she punched her chest with a small fist.

Not to mention killing myself, it is not a big problem to kill a few pounds of blood and break a few ribs.

Yang Gan disliked and said, "The main reason is that my subordinates are behind me. It's not good for us to do this."

Yang Gan shouted in his heart, "Get out quickly, I'm going to lie down."

"Hmph, I think it's quite spacious and awkward to sit on the rhino's back."
Chapter completed!