When he arrived in Qiongzhou, Zhao Hao ended his life of exile, and everything gradually became stable, and the military and political institutions of the Marshal's Mansion were basically sound, and there were people in charge of all things, so he didn't have to do everything himself like in the past, and his life naturally had a regularity. The two masters followed the palace system and formulated a schedule for him, and Wang De was responsible for supervising the implementation. When Zhao Yu was about to get up and wash and change clothes, he went to the back garden to follow Yuan Miao to practice martial arts, and had breakfast after the beginning of the morning; At the end of the hour, it was time for class, and the three masters took turns to teach him.

Originally, the plan was for Deng Guang to lecture on Confucian classics such as scripture and history, Jiang Xuan to teach the art of war, and Ying Jieyan to lecture on national chaos and the way of officials. Because Jiang Xuan is not there, there is a substitute for the festival. It usually lasts for an hour and ends at the end of the hour. When there is no class, there are only two days of synodism, which is the day of the meeting in the house. After the class, Zhao Yu began to deal with official business, reviewing reports sent by various departments, or summoning officials to ask questions. Finish work by noon, have lunch and take a lunch break.

In the afternoon, if there is no official business to deal with, it can be used as leisure time, as for what to do with Zhao Hao, as long as he does not go out of the house at will. And what he loves to do the most is the most fashionable way of leisure in modern times - reading, being in a daze, and doing handicrafts. When the dusk drum sounds, it's time for dinner.,If it's okay, it's time to go to bed at the beginning of the day.,In the previous life, there was no one to sleep at this point except the old man and the old lady.。 Zhao Yu is often delayed by an hour, or even later......

Today, Zhao Yu finished his business early, and after lunch, he rushed into his studio. This is what he ordered the general to arrange according to his own ideas, not only all kinds of tools are complete, but also all kinds of materials, all that is lacking is modern power tools. However, he was already satisfied, and not only did he have a room to be alone, but it was also a good place for him to spend time.

At this moment, two ship models are placed on the large workbench, and next to them are several drawings drawn on parchment. One is a turtle boat that follows him through, and the other is a model of a multi-oared boat, and this and the drawings are all found by Zhou Xiang. He looked at it for a while, and secretly praised the Song Dynasty as a peak period of ancient scientific and technological development, he didn't understand anything else, but from the ship model and drawings, it can be seen that the shipbuilding industry at this time has accumulated rich experience from design to construction, and has a set of scientific working procedures.

The Song Dynasty has taken the load as the design index, and then calculated the length, width and other data according to the actual needs of the river navigation, first manufactured the model of the ship, and then drew the ship diagram according to this, and estimated the number of materials, labor, and the total cost of a certain amount, so that the owner could allocate money and grain before construction. If the ship is built well, the imperial court often issues ship samples to other shipyards and orders them to be imitated, which is obviously impossible without a fairly skilled level of craftsmanship.

At first, Zhao Yu thought that he could transform it according to the shape of his ship, but he soon discovered a new problem, and he ignored the difference between the turtle boat and the Song boat, that is, the hull structure of the two is completely different. This reminded him that the academic circles in his previous life had a relatively clear definition of turtle ships - the master of the ancient Mengchong warship, and he thought that this judgment was still more appropriate.

North Korea has admired Chinese civilization since ancient times, and has always been an apprentice of China, of course, it is undeniable that it also has a certain degree of creativity, such is the design of the turtle boat. The shape of the ship is the Monchong shape, but the hull is based on the banya ship from the Korean mainland. Like the Japanese Ataka boats, these ships are variants of the ancient Chinese warship ships, so all three adopt the form of adding a tall building and an upper deck above the hull, as well as a power pattern of oars and sails.

There is nothing wrong with Japan and South Korea learning China's advanced technology, but the problem is that these two brothers have learned half-heartedly, resulting in warships having their own surface but not their inside. These big ships do not have keels, completely rely on the hull to support the structure, and there is no watertight cabin and keel, which belongs to the keelless warship, so that it will disintegrate when it encounters strong winds and waves in the open sea, so it only has the ability to sail in the near sea, which is why the ancient Japanese warship is called the slippery ship.

The master was of course much more clever than the apprentice, and the shipbuilders of the Tang and Song dynasties were already able to design and build different types of ships according to the geographical characteristics of different waters and the different uses of the boats. At the same time, he is also good at absorbing the advantages of several excellent ship types and combining them to create new ship types. The multi-oared boat chosen by Zhao Yu is a new type of ship with a sand bottom, a war ship cover, and a sea bow and tail, which is actually created by absorbing the advantages of these three ship types.

The multi-oarled boat uses a sand bottom, and the longitudinal structure of the sand boat adopts a 'flat keel', so that the longitudinal strength is strengthened. Although this flat keel is still relatively weak, the keel runs through the end and end, and the structural strength is still greater than that of other sailing ships of the same class; The transverse structure is a watertight bulkhead, which is a layer of watertight bulkhead surrounded by the bottom and side ribs and the beams below the deck.

The use of watertight compartments is a process and technology that greatly enhances the ship's ability to resist sinking, especially the lateral strength of the hull. The bulkheads before the middle were installed before the ribs, and the bulkheads after the middle were mounted behind the ribs. This installation method can prevent the bulkhead from moving, so that the ship's side and bulkhead plate are closely combined, and the two sides are firmly supported, which enhances the lateral strength of the hull, so that the whole ship is integrated vertically and horizontally, and the sinking resistance is better.

In addition, there are many advantages in the structure of the sand boat, its deck surface is spacious, the depth is small, the freeboard is low, and the girder arch is adopted, so that the deck can quickly discharge waves; The stern has a 'out of the boat' to facilitate the installation of the rudder, but also easy to control the canopy, the rudder area is large and can be lifted and lowered, and part of the rudder blades are lowered below the bottom of the ship when going to sea, which can increase the effect of the rudder and reduce the drift. In shallow water, it can be raised to prevent it from touching the beach; The bottom plate and side plate are respectively overlapped with two or three large plates, and the structure forms a fish scale type and is connected by nail tenon, which makes the whole stronger and more advanced than the North Korean embedding method.

In addition, the sand boat has a flat and wide hull, an almost oval cross-section, and a U-shaped bottom, which improves the overall stability and makes it have the characteristics of being an artillery firing platform. And due to the increased sturdiness and sinking resistance of the ship, it is possible to add masts and sails. The good seaworthiness of the hull structure made the modification feasible. Of course, because of these special structures, the cruising speed of the ship is lower than that of the V-shaped bottom seagoing ship, which is not suitable for the defects of sailing in the open sea, but on the whole it still meets the current needs, after all, there is no perfect thing in the world......

The warship is designed and manufactured for combat, and the same is true for the turtle ship, and Zhao Yu's transformation should also ensure that the warship has better seaworthiness, maneuverability and higher speed, while ensuring the advantages of the turtle ship itself, and on this basis, it can be regarded as a success.

The Mongols were quick to conquer the world, and their greatest advantage was their emphasis on offense and close combat. The Song army is best at defensive counterattack, first relying on high walls and spears like forests, dense as a rain of arrows like hedgehogs to block the enemy's attack, and then consider counterattacking the enemy. In an era when the army had absolute superiority, the navy was still only an auxiliary branch and was inevitably influenced by the army's operational thinking.

The original intention of the basic design of the turtle ship was precisely to avoid the combat mode of hand-to-side warfare that is prevalent in today's water warfare, not to engage in face-to-face white-knuckle combat with the enemy, but to give full play to the advantages of long-range firearms to the greatest extent, disrupt the enemy's offensive formation, and then use the collision angle to damage and sink the enemy ship. Zhao Yu is to maintain and innovate under the maintenance of this design idea, so as not to transplant the turtle boat to this era and adapt to the soil and water.

In terms of protective force, the gangside of the multi-oarled ship is manufactured by lap joint, and there are 14 rows of planks from the keel to the side, 1 to 10 rows are two layers of planks superimposed, and 11 to 13 rows are three-layer plank superimposed, with a total thickness of 18 centimeters in three layers, and can also be thickened as needed, up to six layers. Although the turtle boat adopts the embedding method invented by the Koreans, the total thickness of its gunwales only reaches four inches, about 12 centimeters, but even this thickness makes the Japanese muskets unable to shoot the hull of the turtle boat.

It can be seen that the gangways of the multi-oared ship were much thicker than the original turtle ship, but the most primitive musket was much more powerful than the modern bow and crossbow, and the multi-oared ship was able to withstand modern bows even if it was not reinforced. And Zhao Yu knew that in fact, before the invention of the flowering bomb, it was difficult for artillery in the eighteenth and nineteenth centuries to sink enemy ships when bombarding wooden warships, but at the turn of the Song and Yuan dynasties, there was still a real meaning of artillery put into actual combat.

At the top, Zhao Yu felt that it should be changed to a dome-type structure, so that the vertical force could be increased, after all, now large warships have been generally equipped with stone throwers, although the accuracy of that thing is very poor, and the bluffing posture is greater than the actual combat significance, but it is inevitable that when the blind cat encounters the dead mouse, it is always good to be prepared. It is essential to install a nail plate on the back and install an iron cone to prevent the enemy from jumping, and fire prevention measures are also necessary.

The U-shaped bottom of the sand boat with multiple oars has made it have good seaworthiness, and the turtle ship needs to use the angle of attack to hit the enemy ship in combat, because stability and sinking resistance are important, and as a long-range weapon launch platform, the ship also needs to have good stability. The solution of the ancient craftsmen was to equip the boats with 'peace baskets', which were lowered from the appropriate position on the boat when the wind and waves were strong, and suspended in the water to make the boat less rocking.

However, Zhao Yu knew that there was a simpler and more secure way, which was to transform the watertight cabin at the bow and tail of the ship into a living water tank, which is also called a buoyancy cabin or an anti-sway cabin in modern times. It is to open a hole in the appropriate position of the cabin, so that the water in the cabin can flow in or out with the rise or fall of the bow and stern, so as to reduce the rocking of the ship and achieve the purpose of maintaining the balance of the hull.

Lowering the ship's center of gravity to increase the ship's stability is also a method that the ancients have known for a long time, and this point is especially important for turtle ships, which should be resolutely retained. The sea boat is a warship often used by the Yuan army, which can use the tall hull to crush and collide with the enemy ship, and can also provide convenience for the soldiers to pick up the gang, but it often uses a V-shaped bottom, resulting in a higher center of gravity, and if the turtle boat with a lower center of gravity is attacked, in addition to being sunk, it is also very easy to cause capsizing, which is also a natural restraint between the two ships!

In ancient times, there were no steam engines, no oil engines, let alone nuclear reactors, and only human flesh engines were used to power ships. It is necessary to equip the multi-oarled boat with sails, and the unique flat trapezoidal inclined sail that can be rotated in the Chinese civilization area can adjust the angle of the sail at any time according to the wind direction; With bamboo poles and cloth sails, large weight, fast take-off and landing, these technologies are very mature, and there is no need for Zhao Yu to think more. This allows the sails to be used as a power when not fighting or cruising, which reduces the physical exertion of the sailor. In combat mode, the mast with a bamboo shoot structure can be easily lowered to retract the sails and convert them to oars as power.

No one has ever seen the prototype of the turtle boat, but everyone thinks that it is powered by an oar, not an oar commonly used in the West, anyway, Zhao Yu must have chosen an oar. The oar is installed on the eaves of the stern or the side of the ship, the movement trajectory is a bit like the tail of the fish, because the oar blade changes the angle of attack in the process of rocking the oar, but it never goes out of the water, it can do work continuously, and the fulcrum of the oar is located near the midpoint of the oar, and it is more labor-saving when rocking the oar, so the ancients have the saying of "one oar and three oars". Some people in the West also believe that the invention of the propeller is related to the inspiration of the Chinese to use the oar.

Needless to say, the ballista is the best choice for long-range weapons, its power has been tested in actual combat, and it is not a problem to penetrate the ship's plank, but whether it can be sunk depends on luck. It can be used to kill people, it is just touching death, scraping wounds. Zhao Yujue's ballista still has the potential to be developed, as long as it is equipped with the right 'ammunition' and adopts different firing methods, it can also exert greater power and effect.

Man-machine cooperation is also a problem for Zhao Yu to consider, after all, once out of sea, it is ten days and half a month to go to land, life and combat are on the ship, to be able to provide a good environment for sailors is also a necessary condition to ensure their physical and mental health and improve combat effectiveness. In a limited space, it is necessary to store daily necessities, weapons and ammunition, as well as more than 20 ballistas and sailors' working space, leaving a very small place for living. And it was very challenging to plan a place for sailors to eat, drink, and sleep in the small space that was left.

Zhao Yu thought about it for a long time, and suddenly picked up a hammer in his hand to smash the ship model that followed him through, he knew that only by breaking the inherent way of thinking can he create new products, this ship model has completed its historical mission, there is no need to keep it...... (To be continued.) )