In fact, wood is not very suitable for bulletproof and anti-artillery materials, because its ability to resist 'shearing' is very poor. Pen ~ fun ~ pavilion www.biquge.info in layman's terms, although the wood fibers are very strong, but the fibers are not firmly connected to each other, and they are easy to be torn after being stressed, and then there is a chain reaction: the wood breaks, the effect of blocking cannonballs is greatly reduced, and so on.

But what materials can be used on a ship? Metal simply can't be used, and materials like leather can't even be waterproof, so wood is the only option.

However, Liu Jingtian and others found through experiments that if the wood wants to be 'torn', it needs a certain thickness, and if the thickness of the wood is appropriately thinned, and then a material with stronger toughness and will not tear is put in the back, such as mild steel or wrought iron, the ballistic performance of the wood will be greatly improved -- the specific process is: the shell hits, the wood on the contact surface is broken, and the shell is slowed down at the same time; after the wood behind is under pressure, even if it is torn, there is no room to break backwards - The toughness of the iron plate was too high, and the shell had to choose to crush the wood, and as a result, a lot of kinetic energy was consumed before it came into contact with the wrought iron plate.

If the cannonball is powerful enough to penetrate a 5 mm iron plate, there is a layer of wood waiting for it behind it, and behind this layer of wood is a grid-like metal reinforcement, which was originally used to strengthen the hull structure and can also play a role in strengthening the shear resistance of the 'wood'.

Liu Jingtian's self-confidence comes from here: the thickness of the four-story structure is close to 40 centimeters, which is certainly much thicker than that of a merchant ship in this era, but it is certainly thinner than a warship of the same tonnage, and the wood used is only a bargain. But because of the 0.5 cm wrought iron plate, this ship is almost immune to the kobold's own twenty-four pounder guns, and its protection is not below that of a thousand-ton professional warship.

This was also proved by the brutal artillery battle, with countless iron and stone bullets inlaid on the side of the three warships - no way, the wood was soft, and it became 'energy-absorbing armor'. However, there were not many places where the three ships were pierced by shells, and there were basically only places such as the bow and stern of the boats.

The most dangerous thing for the crew is the fire-attacking ship - this ship has not thought about fire prevention!

Liu Jingtian was taking on a heavy task at this time: acting as a mount for the 'Holy Maiden of the Dragon Worship Sect'...... Tesfil performed a light trick on himself, and then sat on someone's back and yelled, "You're too slow, do you have a whip? Or a chew, or a spur? This seems a bit inhumane, you're not fully developed......"

Liu Jingtian Long's eyes were tearful, and his heart was broken: "Once upon a time, the old man also had today...... Why do I have tears in my eyes, because the old man is still a child!"

Crying and rushing to Fort Mogador, Liu Jingtian dropped the heavy golden thighs of Tesfil and hurried to find the fishman to ask for the dimensional cave.

Along the way, he didn't forget to think about life: "The old man suddenly discovered that the 'dragon knight' thing, hehe, the water is very deep! What 'rider got the friendship of the dragon' is actually just happened to get together enough for a pair of perverts! By the way, is this how the 'horse' in the Hong Kong and Taiwan films also came about? For example, chews, whips, or something...... Girls from Hong Kong and Taiwan, you are also working very hard to get married!"

The Great Demon King, who has gained a large number of achievement points through slander, has a clear mind and can continue to bring disaster to the world.

When Liu Jingtian rushed to the fleet with the dimensional cave, he found that the situation of the battleship was quite bad: The 'Finless Porpoise No. 5' had already begun to smoke! If it weren't for the kobolds' inability to swim, these cowards would have abandoned the ship...... Now everyone is desperately trying to carry the gunpowder so that it will not be exploded. The remaining two ships were also roasted by the fire.

The fish-people are also stupid, and they are still living with the burning fireboats, but they are afraid of the heat and can't push them at all.

"Cut, it's all idiots, get out of the way, and let the amateurs come! Also, listen to my orders, throw all the containers in the water and give them to the fishmen!"

Liu Jingtian threw the dimensional cave to the poor man on the No. 5 boat, and then a fierce man plunged into the water and pounced on the burning boats from underwater.

Liu Jingtian's open-minded body is even more flexible than a crocodile in underwater activities, and even has a layer of transparent eyelids that can see underwater, and he quickly determined the target.

The fireships were indeed hot, and most of them were filled with hot fuel such as oil tanks, and you could feel the temperature of the water in the vicinity skyrocketing under the water. But Liu Jingtian is also a dragon species, and bathing in boiling water is trivial, so he used his claws that could cut through rocks and grabbed a few handfuls at the bottom of the boat, and these boats disintegrated immediately......

It was only a few turns under the water, and after a delay of about ten minutes, someone turned these small boats, which had been a headache for the fish-man for a long time, into a pile of debris floating on the water. Whether it's a huge nail or chain that was hammered into the ship, or something else strange, it's a small problem in front of the Great Demon King who is not afraid of open fire and strange powers!

Suddenly, Liu Jingtian slapped his head fiercely, and he suddenly thought of a question: "Oh! I'm so good at being a frogman, why don't I go to the enemy to have a look? Wouldn't it save a lot of trouble!"

However, after looking at the situation on the battlefield, Liu Jingtian had to regretfully give up this tempting idea: "Cut! Not at all, a lot of debris floating on the water is still burning, and a small flame has already begun to emerge from the side side of the No. 5 ship! If you don't want to think of a way, these boats will have to be explained here!"

The top priority is to rescue these three warships.

Liu Jingtian had to personally direct those fishmen, with their upper bodies exposed to the water, and in the water, they used all kinds of pots and pans to splash water on the boat - although it looked weird, this method was easy to use!

At the same time, the kobold who got the dimensional cave was also splashed in the water inside the ship......

Fortunately, wood is a good material for thermal insulation, and although the high temperature outside the hull has caused a small amount of burning, it can still hold people inside.

With the combined efforts of kobolds and fishmen, the small-scale fire on ship 5 was finally extinguished.

"No, safety first! After the pirates set fire once, they can put it a second time, and the fire prevention ability must be improved again!"

Liu Jingtian simply became the captain of the transport brigade again, shuttling between the two castles. Because of the more than ten kobold warlocks that everyone had worked so hard to cultivate, they also followed the battle this time, but they followed Guan Renxiu's side.

During the time he was tossing, Tesfil was also in action.

"First-level spell, Breeze Technique!"

It's a small spell that can induce a third-degree wind and blow it in a given direction for hours - just as much as it can make the flag unfurl gently.

However, because this is the middle demon plane of the demonless net, Tesfil's spells will still be discounted. However, it is still okay to blow away the smoke near the pirate fleet.

As a result, several of the pirate's huge ships soon discovered this deadly 'breeze' - the three strange ships of the kobold were still hidden in the thick smoke and could not be seen at all, while the five ships of their own were suddenly exposed in front of the castle, and they could see each other clearly......