Three days later, off the mouth of the Thames, between Ipswich and Bruges. The entire British fleet of the Ming Navy, stationed at Portsmouth Military Port, was dispatched and sailed here in the name of patrol training.

A batch of experimental depth charges secretly transported from the arsenal in the London Concession onto a slightly modified ship is about to be tested here for live ammunition.

A number of destroyers patrolled the perimeter, strictly preventing any spy ships from approaching. On the simply modified transport ship, Vice Admiral Yunmo saw up close what Zhang Cheng called a submarine killer with depth charges.

"Just throw it into the sea?" Lieutenant General Yunmo looked at the poorly made iron buckets in front of him and asked with a puzzled expression.

"Your Excellency, General." Xu Mu, as the director of the company, took the initiative to respond: "This is the masterpiece of Major Zhang Cheng, the chief designer of General Dynamics. This depth charge is designed to deal with underwater killer submarines that are lurking at the bottom of the ocean. ”

Xu Mu stretched out his hand and pointed to the fuse on the depth charge, and said, "This is a specially treated fixed-depth fuze, which can calibrate the required depth and activate the fuse before dropping." It is then possible to attack an enemy submarine at a derated depth by throwing it into the sea by throwing it into the sea with such a simple dropping device. The power was huge enough to destroy an enemy submarine using the enormous water pressure generated by the explosion. "The premise is that it is within a certain distance. This sentence was said by Zhang Cheng himself in his heart.

"So how can you judge the depth of an enemy submarine and then set the exact depth of the fuse?" Lieutenant General Yunmo frowned and looked at the row of ugly depth charges in front of him, and asked suspiciously.

"This" Xu Mu looked at Zhang Cheng with some embarrassment.

"General." In the middle of a group of navy whites, Zhang Cheng, who was wearing an army officer's uniform, stepped forward with a smile, "Your request belongs to the category of another weapon system." It was for reconnaissance and positioning, and today it is an offensive weapon that will be tested. The Navy needs to ensure that it first has offensive weapons capable of destroying enemy submarines. As for the general's requirements, you can place orders for the development of detection equipment from various arms companies. ”

Lieutenant General Yunmo glanced at Zhang Cheng deeply. Although he felt impossible, his intuition told him that this spiritual young man in front of him already had the answer!

"Okay." Lieutenant General Yunmo nodded, "I'll talk about the detection equipment later, now let's take a look at the power of this weapon." ”

An hour later, Vice Admiral Yunmo satisfactorily invited Zhang Cheng to board his flagship Hengshan to talk in detail.

As a battleship with a full load displacement of up to 35,000 tons, even if it has been officially in service for more than 15 years, the Hengshan still has strong strength. After Zhang Cheng boarded the battleship, he deeply felt the huge deterrent power of this ultimate weapon in this era.

This old super-dreadnought has eight twin 380 mm guns. Sturdy armor, a wide hull and a towering bridge form the shield and blade of this sea giant!

"How?" Vice Admiral Yunmo stretched out his hand and patted the huge turret on the side, and looked at Zhang Cheng with pride on his face, "This is the foundation of the navy's dominance over the world." When these sea giants come together, no enemy on the planet can be their match! ”

Lieutenant General Yunmo's words were not wrong. At least in the current era, when the Ming Empire's navy gathered together its main fleet, which was scattered all over the world. A vast fleet of six cutting-edge provincial capital-class battleships, fourteen super-dreadnoughts, four battle cruisers, and six mothballed super-dreadnoughts, at least on paper, no country's navy can contend with. And that's not even adding to the much larger group of light warships. If you fight alone, the Ming Navy is invincible.

Zhang Cheng curled the corners of his mouth slightly, looked around at the powerful naval warships, looked at the huge turret again, and nodded with a smile, "It is indeed very powerful." When all the naval officers around him had reserved smiles on their faces, they suddenly continued, "But if I were to attack, I would be able to send all the ships here to the bottom of the sea in forty minutes at most." ”

"Hiss~~~" Vice Admiral Yunmo, who was about to take Zhang Cheng to the bridge, couldn't laugh in an instant. As for the surrounding naval officers, they all looked stunned, as if they had heard it wrong, and they didn't understand why Zhang Cheng suddenly said such crazy things.

"Don't talk nonsense!" Vice Admiral Yunmo's tone instantly took on a stern meaning, "Do you know that you are insulting the navy?!" Although he admired this young man, Yunmo Lieutenant General couldn't accept Zhang Cheng's arrogance. If this kind of remark is spread, it will inevitably cause dissatisfaction with the navy, and it is meaningless to Zhang Cheng.

Zhang Cheng ignored the naval officers around him who were glaring at him, spread his hands, and said with a smile, "I'm not wrong." If there were several submarines circling around the neighborhood now, it would not take much time to sink these ships. ”

"You!" The corners of Yunmo's eyes twitched, and he stretched out his finger to point at Zhang Cheng, his lips trembling but he couldn't speak. He was not angry at what Zhang Cheng said, but angry that what Zhang Cheng said was indeed the truth, but he couldn't find words to refute!

"Humph!" Lieutenant General Yunmo, who was huffing, waved his hand vigorously, turned around and walked towards the bridge. The naval officers beside Zhang Cheng also showed dissatisfaction one by one. Although it is true, there are some things that do not have to be said in front of the person concerned.

Zhang Cheng shook his head with a smile, waved his hand to Xu Mu, who quietly raised his thumb to him on the side, and walked towards the bridge.

The Hengshan has been the flagship of the British berthed fleet for more than five years. His bridge and officer's quarters, as well as the conference room, were converted to the command ship class, and the interior was very luxurious. It is completely in line with the style of the navy as an aristocratic service.

After arriving at the bridge, Vice Admiral Yunmo, who looked unhappy, immediately ordered the captain to turn around and prepare to return to Portsmouth Military Port.

"General." Zhang Cheng came to Lieutenant General Yunmo's side and said softly, "Can it be regarded as a successful acceptance now?" ”

"Hmm." Lieutenant General Yunmo nodded: "It does have an effect." However, I feel that the technology of this thing is too rough, and it can be produced by just finding a processing plant. I feel like the contract I've given you is a little too cheap for you. ”

"Huh." Zhang Cheng shook his head with a chuckle, raised his hand and nodded his head, and responded with a smile, "General, this is the power of wisdom." ”

Lieutenant General Yunmo felt that his good mood was gradually dissipated by the somewhat sneering guy in front of him. glanced at Zhang Cheng coldly, and said in a deep voice, "You come with me." ”

In the spacious and ornate conference room of the Hengshan, Zhang Cheng stepped on a large handmade Persian carpet. With his hands behind his back, he carefully looked at the artworks hanging on the bulkheads around him, and he was fascinated by them.

Lieutenant General Yunmo waved the adjutant who brought the tea away, took out a cigarette from his pants pocket and lit it. came to Zhang Cheng's side and asked aloud, "Which one do you like?" ”

Zhang Cheng paused slightly, squinted his eyes, and raised his hand to an ordinary landscape painting hanging next to the cabin door. There was some doubt in his eyes, and he looked at the money with some uncertainty and said softly, "This is"

"Fancy this?" Lieutenant General Yunmo smiled and said, "Your vision is not very good." The painting is very ordinary, but the person who painted it still has a bit of weight. This was the Minister of the Interior of the German Empire and Deputy Chancellor of Prussia. Hitler's work. This was a gift he gave to the Navy when he visited the imperial capital and returned to his alma mater, the Imperial Capital Academy of Fine Arts. ”

"That's true." Zhang Cheng suddenly laughed out loud and raised his head with a helpless expression. The world is so crazy, history has already gone down a fork in the road hundreds of years ago, why is this happening? Zhang Cheng felt that he really wanted to laugh out loud. What's going on with TMD?

"What's wrong?" Lieutenant General Yunmo, who originally wanted to continue the introduction, found that Zhang Cheng seemed to be in a wrong mood and asked suspiciously.

"Nothing." Zhang Cheng's expression was solemn, and his eyes looked at Lieutenant General Yunmo calmly, "Let's talk about a new project." ”

Lieutenant General Yunmo looked at Zhang Cheng who was changing his face quickly with some surprise, turned his head and looked at the obviously ordinary oil painting again, and his heart was suddenly full of doubts.

"If you just have depth charges, you just have weapons that can attack submarines. However, submarines hiding in the deep sea are very hidden and difficult to detect. Even with depth charges, it is not easy to find a target. You can't try your luck at the sea, right? Zhang Cheng came to the sofa and sat down, picked up the teacup and took a sip at any time, his eyes lit up, "Good tea." ”

"I knew you kid already had something." Lieutenant General Yunmo walked over with a smile, sat down on the sofa opposite, and threw Zhang Cheng a cigarette casually, "Say, what a good thing, let me also open my eyes." As long as it is useful, the navy will not treat you badly. ”

"I have a new device." Zhang Cheng took the cigarette and lit it, and looked at Vice Admiral Yunmo calmly, "Submarine probe, also known as sonar. ”

"Sonar?" Lieutenant General Yunmo looked puzzled, "Why did you come up with such a strange name?" ”

Zhang Cheng's body paused slightly, "Don't dwell on these unimportant details." "Raise your hand to cover your mouth and cough" is an electronic device that uses the propagation characteristics of sound waves under water to complete underwater detection and communication tasks through electroacoustic conversion and information processing. It is possible to detect, locate and communicate with underwater targets. Other words. A smile appeared on Zhang Cheng's face, "Use this submarine to find the state of submarine." ”

In fact, there are two phases to the emergence of sonar. They are passive sonar and active sonar. If Zhang Cheng is a qualified arms dealer, then he should definitely sell it in two parts to make the most profit. However, Zhang Cheng mainly did business to raise wealth. The provision of new technology to the army was also intended to increase the strength of the Ming Empire. He just took out the passive sonar.

PS: Thank you for the support of book friends Chun Jie Xiao Mo, Wind and Rain Sword, Grave is zzd's family, and zhouyu1976. Thank you to all those who supported this book.