The successful trial production of the main gun of the Yamato-class battleship was not surprising to Zhang Lin, he had the experience of his predecessors, but he worked harder than his predecessors, and the rest was to go all out to build! There is also a big killing weapon, Zhang Lin has thought about it for a long time, this world has not appeared, as long as Zhang Lin has it, at least in the early stage of the war, he will have a huge advantage, and this advantage will be maintained until everyone understands how to deal with it!

That's right, it's the submarine, during World War II, the submarine caused huge losses to all countries, and the main anti-submarine means are only depth charges, although later there were many anti-submarine means, but the concealment of the submarine has also been greatly improved, at least for now, the world has not seen this kind of naval warfare weapon!

Zhang Lin was planning to produce submarines at this time, and according to the information that Zhang Lin knew, the shortcomings, advantages and disadvantages, he designed a submarine on his own!

The submarine is fifty-five meters long and five meters wide, with a standard displacement of 330 tons, a full load displacement of 410 tons, equipped with four 533 mm caliber torpedo launchers, one in the bow and one in the stern and one on each side, and a 72 mm rapid-fire gun on the top for self-defense, carrying a total of 16 torpedoes, a crew of 36 people, using diesel-electric dual power, a total power of 45 horsepower, 11 knots for sea navigation, 5 knots for underwater navigation, a maximum depth of 45 meters, and a maximum sea surface cruising range of 300 nautical miles. The underwater endurance is 1 hour and 20 minutes and 3 knots!

This experimental submarine can meet Zhang Lin's exploration needs and operational requirements for follow-up submarines, but these still need to be studied, but the approximate performance Zhang Lin is so required!

Of course, there are some things that need to be prepared for a rainy day, that is, anti-submarine means, Zhang Lin plans to modify the existing destroyers and light cruisers, add two depth charge rails to them, and upgrade the underwater sonar radar, once you know the power of the submarine, you will definitely be imitated, and you will first train the means of anti-submarine warfare to deal with this huge change!

Of course, this is also the means of Zhang Lin and the pirate alliance to play against each other, there is no killer feature, how to win, but now it seems that in terms of the production capacity of the Storm Strait, the mass production of this submarine is very difficult, and it is necessary to find Smith to cooperate and must vigorously produce, Germany's wolf tactics make Zhang Lin very admired, this tactic requires a large number of submarines to cooperate, and naturally requires a certain number of submarines. Pen "Fun" Pavilion www.biquge.info

After Smith received Zhang Lin's secret message, he hurried over, wanting to see this big killer, a big killer that was enough to change the course of history!

Zhang Lin was looking down at the documents in the office, and Smith came in in a hurry, ignoring Zhang Lin's surprised expression: "Where is the big killer, let me see?" ”

Seeing Smith break in like this, Zhang Lin smiled a little bitterly, it seems that Smith is really in a hurry!

Zhang Lin put down the document in his hand without hurry and stood up: "Smith, don't be so out of shape!" ”

"You said that this thing is enough to change history, I want to see it, you let me see it, or I won't be able to sleep!" Smith couldn't be more anxious, this is not the time to joke!

Seeing Smith who was in a hurry, Zhang Lin couldn't tease him: "You come with me!" ”

Smith followed Zhang Lin to the study, which was the place where Zhang Lin read and rested, "Look at it, on the table!" ”

Smith walked to the desk, picked up the design drawings on the table, looked at them carefully, and for a full hour, Smith was immersed in the design drawings of this submarine, with an obsessive look on his face: "This is really a masterpiece of the gods!" ”

"How?" Zhang Lin looked at the shocked Smith and asked with a smile!

"It's so shocking, I really didn't think of it, is this your design?"

Zhang Lin nodded, not denying it!

"You are such a genius, I really can't describe you in words, this can really change the final course of naval warfare, enough to change the history of the Navy, what are you going to do?" Smith couldn't calm down his mood for a long time, and asked Zhang Lin excitedly!

"This must be kept secret, until it is known to the world, it must be kept secret, you can't sell it to anyone, I need fifteen such submarines, if you can do it, you take it!" Zhang Lin said his request, he was not afraid that Smith would not be impressed, and believed that Smith would make a wise choice!

Smith took a few deep breaths: "Is that all there are to you?" He was a little incredulous, this requirement was too simple and there was no difficulty, Zhang Lin's request was easy to meet!

"Yes, we've been working together for so long, I trust you, any smith?" Zhang Lin looked at Smith for a long time, waiting for him to give an answer!

"I accept, I promise you, in your request, there will be no accidents, and in addition, in three months, I can deliver you a batch of these warships, so that you can fight with peace of mind!" Seeing Smith say this, Zhang Lin asked strangely, "Do you know it's you?" ”

Smith laughed and picked up the design drawings on the desk: "Of course, anyone with intelligence can see that the Pirate Alliance intends to attack you, although your strength is very strong, but the Pirate Alliance is not a vegetarian, a dragon fight is inevitable, and only one of the two can be saved!" ”

Hearing Smith's analysis, Zhang Lin was surprised in his heart, it seems that Smith's intelligence path is not simple: "Can you tell me the detailed information of the Pirate Alliance?" ”

"It's a bit hard!" Smith paused: "It's not that I don't help you, it's that the Pirate Alliance is too mysterious, we only know about their superficial things, and we don't know anything else, but I still know some secrets, I'll go back and sort it out and send it to you, you can refer to it!" Don't take it too seriously! ”

Hearing Smith say this, Zhang Lin was a little curious: "Oh, why can't you take it too seriously?" ”

"These are all things from a long time ago, you can't take it seriously, the pirate alliance is too mysterious behind it, it's difficult to find out effective information, these scattered pieces of information maybe you can see something, it's better than not knowing anything!" Smith's words made Zhang Lin feel very uneasy, there are too many unknown things in this, Zhang Lin needs to make a good calculation, the most important thing is to enhance his strength, as long as the strength is enough, he is not afraid of anything!

"It seems that the Pirate Alliance is still too mysterious, even you don't know, you really can't think about what is behind them, they actually defeated the Blue Moon Empire!" Zhang Lin and Smith chatted while walking!

"No matter what happens, you must protect your life, your background is still too shallow to compare with the Pirate Alliance! You need time! Smith said.

Zhang Lin understood this, and after sending Smith away, Zhang Lin felt even more urgency, some things must be completed as soon as possible!