Of course, Zhao Xin knew very well that the strength of these shipwrights, he did not choose which one in the selection of verification projects, obviously exceeded their ability to bear it, for example, the large multi-deck, artillery compartment, and even the recoil of large guns. These projects, without a sufficiently large hull, simply had no way to measure.

The largest one has only supervised the production of 800 materials, and it is impossible to expand to 8,000 materials all at once, and the 10-fold increase is not simple to expand.

According to the standard of the Galen ship, 800 materials, but more than 200 tons, less than 300 tons, he called it a large sailing ship, in fact, it is still a little reluctant, generally speaking, only ships of more than 500 tons can be called large.

At the height of Spain and England, their main force, a huge fleet of warships, was basically seven or eight hundred tons, with four or five decks, and at once had more than 100 guns, terrible weapons of war.

In the future, it is almost certain that the main warship of the Ding Navy will definitely be at this level, such artillery, not to mention one enemy thousand, as long as it is matched appropriately, strong firepower is enough to destroy everything.

These are the problems to be solved later, this test, mainly the original flat-bottomed, boxy sea vessels, gradually towards the narrow sea vessels, narrow and long hull, more suitable for high-speed navigation, can reduce drag, these at low speed, not very eye-catching, but at high speed, in the deep sea, the effect is quite obvious.

In addition to the changes in the hull, the most important sail in other aspects, the difference in the sail, the effect on the boat is also different.

Unlike the traditional rigid square sails of Chinese sailboats, there are many types of sails on Western boats, ranging from crosssails, schooners and mixed sails.

China is a hard square sail of a sailing ship, in fact, it is a sail, they can eat enough wind to provide power to the ship, the sail, that is, the spinnaker, is a kind of sail that can be turned back and forth, easy to operate, can be used with the wind and the wind, less affected by the wind direction, not as good as the sail when downwind, but the ability to sail against the wind is strong.

All of them were shirters, and most of them were used on small sailboats, after all, there was not enough power.

In real ocean-going vessels, mixed sails are mostly used, and in daily power acquisition, crosssails are mostly used, and when encountering headwinds, when the sails do not work, they will use schooners, and when they are headwinds or unsuitable, so that they can have the best of both worlds.

Different layout structures, these can not be verified one by one, can solve one, can solve one, Zhao Xin has thought of all the things that can be thought of, in the whole test project, the choice is more distinctive.

For example, the protruding elongated mast in front can increase the area of the entire sail.

In the traditional hard sail, is a fixed mast, such a fixed sail, it is not easy to lift and land, the experimental sea boat, in front of the whole ship, with the extension of the onlookers, pulled up a huge spinnaker, this kind of spinnaker, not only can make the sea boat, under the premise of headwind, can still obtain a certain kinetic energy, but also increase the area of the sail.

Traditional sails, they are on the mast of the mast, the mast cannot exceed the length of the whole ship, but the mast that extends forward is a large part of the original foundation.

Sea ships have increased the length of the hull and reduced the width of the hull to have a hull that is more suitable for sea navigation, but this lengthening is not unlimited, and a ship of hundreds of meters or even kilometers will be very unsuitable on the ocean.

The mast that extends forward and backward has become a new option, and the length of the hull can be increased by extending the mast more than ten meters long relative to the hull.

In fact, at the height of the Spanish galleon, the classic model of this sailing ship, the size and size of the sail was almost much higher than the hull itself, and in the model, the entire hull was blocked by layers of sails.

For soft-sail ships, a larger area represents a more wind-bearing area, and under a reasonable center of gravity position and mechanical balance, greater kinetic energy can be obtained.

In the era of ordinary sail warships, the main power was gained, that is, the wind and ocean currents.

Generally speaking, the impact of ocean currents on any ship is similar, different, and minimal, but the degree of wind exposure is different.

Even with the same height of mast and sail width, the wind area of the soft sail is higher than that of the crosssail.

When the wind blows up the soft sail, the wind blows up, the total area will expand, although there are some angle problems, but the wind will be higher, under the premise of similar resistance, the greater the force, the higher the speed.

For example, compared with Spanish sailing boats, the speed may be doubled when the traditional Chinese sailing ship is downwind, and it is even more obvious when it is upwind, only the crosssail, no spinnaker Chinese sailing boat, in the state of headwind, it is almost impossible to obtain speed, and on the contrary, the mixed sail can obtain speed in any state.

In the early naval battles, speed became the most critical point, if the firepower is insufficient, if the speed is fast, you can run away, if the firepower and speed are not enough, then you can't run.

For seagoing vessels, because they are more suitable for the ocean-going environment, although the draft is very deep, it is no longer suitable for docking in rivers, or offshore ports are not suitable for docking, but he has enough mechanical balance to constantly increase the area of the sail and increase the speed.

This is also an important problem for hard sails and flat-bottomed Chinese-style sailing ships, not to mention that the hard sails cannot increase rapidly and cannot be expanded endlessly, because when the wind becomes stronger, although the force will increase, but the sail is in the wind, it is a little difficult to land, and the fixed sail is difficult to land, and if you are not careful, there will be problems.

Chinese-style sailing boats, feared, is that the sail is too big, in the storm, need to lower the sail to deal with, when the wind is strong, the soft sail also needs to be lowered, but for the ocean, a little bigger, the hard sail has to be lowered, but the soft sail, in the windy weather, but can fully open the soft sail, eat enough wind, get enough speed.

Flat-bottomed Chinese-style sailboats, they carry a very large cargo, when the wind is too strong, it is easy to roll over, and a little larger wind and waves, it is easy to sail.

In fact, this problem is not solved by technology, flat-bottomed boats, shallow draft, under the premise of the same size, the carrying capacity is larger, in the merchant ship, among them, it is often a better choice.

However, when there are some extreme or bad conditions, it is easy to roll over, and even in the 21st century, it will appear, let alone in the Northern Song Dynasty.

As long as you change it and replace the flat hull with a pointed bottom, you can solve a lot of problems.

The appearance of the steel keel, the keel determines the shape of the whole ship, the keel used in the flat bottom of the ship, and the bottom of the sea ship, the use of obvious differences, there is this, at least in the shape, there is no problem.

However, the first 4 boats, they did not test a lot, some of the soft sails, but only a part, the complete soft sails on one side, two sides, have not been completed, an experimental ship used to verify the long mast, but on a hard sail, how to feel a certain sense of disobedience.

Although, through the adjustment of the sail, the increased force area also has a certain positive effect, but such an effect, the danger is also relatively large, after all, where is the bow, it is not safe.

But even if that's the case, you can test something, for example, the performance of a part of the soft sail, for example, the performance of this pointed bottom.

In the 21st century, with the development of science and technology to a deeper level, the original theoretical verification has gradually become a hypothesis and conjecture.

The process of the experiment is to verify whether this road can be passed, Zhao Xin knows the direction of development, but he is not a professional engineer, let alone a researcher, he cannot know the exact number of these sub-projects, and can only rely on these experimental ships.

However, even if these experimental ships are built, the verification process is not easy, and some additional factors must be removed, which requires some research methods.

Among the many industries in the entire Northern Song Dynasty, shipwrights are standing on the top of the world, even if these shipwrights in the Dinghai Navy are not the top in the entire Northern Song Dynasty shipbuilding industry, but they are above the standard.

To complete the basic construction of a ship, it takes a lot of experience and foundation, how to build, how to build, even if they are in accordance with Zhao Xin's requirements, build this, they will also think, some skilled personnel, can also feel from the feeling of control, what is going on with this thing, whether there is some improvement.

These improvements, sometimes very subtle, a little not felt, there is no more, Zhao Xin must go back, guide them to gradually realize the benefits of these things, and strive to concentrate these sub-projects on one boat.

Perhaps, it is not possible to make a large Galen ship, or a Spanish sailing ship, but it is still possible to make some large ships suitable for the sea, and this combination process must have enough data to support and dexterously apply different parts of each sub-project.

If it is simply large, as long as it is expanded on the basis of the original Chinese-style sailing ship, it can be obtained, according to the historical records, the Nanhai No. 1 is more than 800 tons, and this number is close to 30,000 materials.

In the Ming Dynasty, Zheng He's treasure ships in the Western Ocean, they were also thirty or forty thousand materials, it is certain that in the Song Dynasty, they have begun to use the combined keel, otherwise, the 800-ton ship can not be built at all.

The length of Nanhai No. 1 is 30.4 meters, and in the whole of China, there are trees over 30 meters, and many trees can reach such a length after the accumulation of time.

However, on the big tree, it can be used on the keel, but the thickest and strongest part can reach a length of 30.4 meters, and the overall height may be 40 meters, or even 50 meters.

It is impossible to have a tree of such length, and even if it is a combination keel, it is not easy to find such a keel if you choose a combination of sufficient strength and as little as possible.

In Dingjun, there is no such problem, as long as the steel keel is used, perhaps, similar to the large ships in the Western Ocean, there is absolutely no problem, but about 35,000 stones, that is, about 10,000 tons of ships, there is absolutely no problem.

Such a ship, in this era, is a giant, no ship can compete with him, and a simple high ship makes it impossible to carry out any broadside tactics.

However, such a ship, which is useless, and there is no way to even artillery, a large number of them are placed on the ship.

With the multi-deck of the Galen ship, the position of numerous guns, because in the Galen ship, the keel is important, and the sides, and do not bear much weight, on this premise, can be opened and become a gun position.

They can't make gun holes on the side like Galen or Spanish galleons, and they can only put a few places in the front and rear, or on the deck, so that the firepower is very difficult.

How many decks of a ship there are, and on the deck, it is also the most vulnerable place, under the premise of the same tonnage, or even a larger tonnage, the Fu ship does not have enough combat effectiveness, which has also been verified in modern ocean warfare.

Even Spain and England did not send their main battleships. Similar to Britain, in the 18th century, in the East Asian fleet, at most, it was a third- or fourth-class battleship, but in China, the real main force was definitely a second-class or even first-class battleship.

In this way, in the Opium War, China could not resist the sharp front of the army at all.

Similar to China's Fu ships, their tonnage can reach 2000 to 3000 tons, but the guns they can arrange are 4-6 guns at most, but under the same tonnage, even under the smallest tonnage, the difference is very huge, according to the division of sail warships, only one deck of 6th class battleships, they also have at least 16 guns, the tonnage of these ships is far smaller than that of Fu ships.

Of course, Zhao Xin will not make the same mistake, if you only consider the broadside battle, the weakness of the Fu ship is not obvious, but it is almost inevitable to enter the premise of the artillery era, the multi-deck super battleship, that is the best choice for the use of tonnage, under the premise of the same tonnage, the number of artillery is more, and the number of guns that can be projected on a single side is also more, which is an inevitable choice.

However, in the information, the projects that have been completed, there are not many projects that Zhao Xin values, and it seems that there is no need to be in a hurry, but from the second day after receiving the information, Zhao Xin still sped up, and in one day, he traveled for 6 hours in a row, and he traveled about 450 miles in total, and he was only less than 120 miles away from Haizhou.