Zhang Lin was drawing the design drawings of the Yamato level overnight, of course, it was the original, all kinds of tools were set up on the table, and the drawings were also scrapped, the reason why Zhang Lin drew overnight was that he felt the urgency of the world situation, and on the other hand, he didn't know how to explain Tang Xue's affairs to Avril, although he brought Tang Xue back!

So Zhang Lin drew pictures in the office overnight, mainly for the modification and construction of the Yamato-class battleship, the 460-millimeter cannon, which did not fight with the Iowa class in World War II, is a big regret for the fans of the big ship and the giant artillery, no one knows how powerful the 460-millimeter giant cannon of the Yamato-class is, now you can see it!

The main gun of the Yamato-class is 45 times the caliber ratio, and in terms of secondary artillery and air defense, Zhang Lin feels that it is better to change it to a 150 mm twin high-level dual-purpose secondary gun, and a 120-mm high-level dual-purpose rapid-fire gun, the wide hull can accommodate more anti-aircraft guns, and the underwater anti-mine armor can be modified, as for mine protection, the finely divided watertight compartment can improve the battleship's resistance to water ingress and improve its sinking resistance!

In this way, the combat capability of the Yamato-class can be greatly improved, and it can prevent the destroyer from riding the torpedo in the face, which is what Zhang Lin wants to change, as for the engine, the use of high-pressure boilers, four sets of turbines, and four-shaft transmission can greatly increase the speed, at least 30 knots!

Of course, these modifications need to be verified theoretically, the key is that there are many problems in the design of the current 460 mm cannon, the main thing is that the excessive pressure of the main gun leads to a significant reduction in the number of main gun shots, and it will lead to a bombardment, a main turret explosion, which is fatal for a battleship, and each main gun of the Yamato class accompanies a hundred shells, once the ammunition depot is destroyed, it is not a joke, so this is a problem that must be solved!

There are six docks in the shipyard of the Storm Strait, all of which are deep-water docks, and it is not a problem to build ships, but the main guns need to be trial-produced and tested, which requires professional talents to do. Pen, fun, and www.biquge.info

Zhang Lin has thought a lot about this aspect, first of all, blast furnace and other steelmaking equipment, these seaports can meet the requirements, as for the forging equipment, it can also forge the main armor belt of the Yamato-class These don't need to worry, that is, raw materials, some ores, the seaport does not have, these need to be imported, and it is not an ordinary small number!

The next day, Zhang Lin's eyes were red, and the result of staying up late was that he probably had a modification plan in his heart, and now someone needed to go with Zhang Lin to take turns with this thing, so Zhang Lin was going to find Smith to borrow some engineers to come over and complete this, the workers were easy to find, and there were many people in the harbor, and this could still be completed, but there were no technical talents, so Zhang Lin had to go to Smith for help first!

After hearing Zhang Lin's request for help, Smith agreed, feeling that sending fifteen experts in shipbuilding to the harbor to give Zhang Lin technical guidance was Zhang Lin's small abacus, and the technical guidance was to steal the teacher, and cultivating his own talents was the king, otherwise he would have to rely on others for everything, and he would be restrained everywhere, which was not what Zhang Lin wanted!

In the days that followed, Zhang Lin tried to avoid meeting with Avril Tang Xue, the way Zhang Lin hadn't thought about it yet, and he didn't know how to convince Avril and Tang Xue, of course, Tang Xue's problem was very small, mainly Avril, since the engineers sent by Smith came to the harbor, Zhang Lin was with these engineers every day, and there were some people selected from the harbor to learn shipbuilding techniques!

For more than half a year, Zhang Lin tried to produce seven 460 mm cannons, but they were not satisfied with the performance of these cannons, either the rate of fire was low or the life was short, and they could not be used in actual combat at all, and from the experimental results, the deep penetration data of these cannons was not good, and they did not reach the level of 460 mm cannons at all, which made Zhang Lin very distressed!

After going back and thinking about it carefully, Zhang Lin was relieved, these giant cannons have been trial-produced by other countries and arms dealers for a long time, and none of them succeeded, so if it was so easy, they would not have failed so many times!

In this half a year, the hull structure of the Yamato-class is basically completed, of course, some modifications are needed, the main armor belt and boiler turbine are not installed, just a steel hull, although the remaining work has been going on, but it is still relatively slow, Smith has been vigorously supporting Zhang Lin, providing Zhang Lin with a lot of special steel, so the Yamato-class has today's progress! At this point in the project, Zhang Lin needs to patiently manufacture the main gun and experiment with different technologies in order to solve the current problems!

This half year has also been eventful, the Pirate Alliance defeated the Blue Moon Empire, completely wiped out the Blue Moon Empire's power here, completely controlled the surrounding waters, and began to eyeing the Storm Strait, but forced by the deterrent power of the Liberty, there has been no action, in the last battle, the combat effectiveness of the Liberty made the Pirate Alliance suffer a big loss, and now it has the main warships such as the Pioneer and Victory, the Pirate Alliance did not dare to act rashly for a while, but this is all temporary!

Zhang Lin knows that this neighbor has always been restless and aggressive, and the temporary tranquility does not mean anything, and the undercurrent of the harbor has been surging recently, which makes Zhang Lin feel deeply uneasy!

Under Zhang Lin's order, the harbor has been in the second level of combat readiness, although there is not a single pirate in the waters around the strait, but the fewer and fewer merchant ships are enough to make Zhang Lin vigilant, this is a big problem, indicating that the pirate alliance has already intended to do something in the Storm Strait!

However, in the days that followed, Zhang Lin received a secret letter, a secret letter that interested Zhang Lin, probably the content of which was that if Zhang Lin promised to avenge their brother, they could work for Zhang Lin, and provide Zhang Lin with information about the Pirate Alliance, and told Zhang Lin that these were absolutely true, and they could make a name for themselves!

Interesting, Zhang Lin touched his chin, the two brothers, if there is this bargaining chip, Zhang Lin still has a great chance of winning this game, for the pirate alliance, Zhang Lin is mainly lacking in intelligence, because intelligence personnel are difficult to penetrate, without intelligence, it is not easy to fight at all, this kind of unsure battle, don't fight!

Although I don't know what the two of them will pay attention to, but the other party dares to make a statement, indicating that there is still a certain degree of sincerity, Zhang Lin will burn the secret letter, continue to develop the main gun of the Yamato-class battleship, I believe that the other party will still have a secret letter will come, but also beware, if it is a trap, then Zhang Lin will be encircled!

The development of the main guns of the Yamato-class battleships has finally made new progress, using the new main gun tightening technology, the main guns of the Yamato-class battleships have been successfully trial-produced, although the life of only 200 shells is achieved, but the data such as deep penetration fully meet Zhang Lin's requirements, and the Yamato-class battleships can finally speed up the project!