Fortunately, the officers and men on the submarine finally noticed that something was wrong in front of them. The ship in the shot does not have the meaning of rust and dilapidation as expected, but it looks excellent and shiny as new. Looking at the periscope and began to rotate slowly, and finally aimed at the barge in the distance, Qingying's feet were soft, and he actually felt a sense of prostration for the rest of his life. After a while, Qingying seemed to think of something, and suddenly turned her head and stared at Khedira with a murderous gaze. Khedira laughed dryly and said, "The young men of the Navy will inevitably have some discomfort when they operate a submarine for the first time. Your Highness, please don't look at me with such eyes, although the position of the submarine is a deviation, it has managed to successfully complete a full-speed voyage that lasted more than 1 hour underwater, hasn't it? This shows that the underwater navigation performance of this submarine is also very superior! ”

Seeing that Qingying's face was still gloomy, Frick on the side shook his head with a smile and said, "Your Highness is too worried." The German military strictly controls military items, and torpedoes, a powerful weapon capable of causing mass destruction, are under their strict supervision and are never allowed to leak out. Even if this submarine was a military test product of Your Highness, the Navy refused to hand over a complete torpedo to us, but specifically removed the combat charge part inside. Even if the yacht is accidentally shot by a submarine, there will be no problems. ”

Hearing Flick's explanation, the anger on Qingying's face gradually subsided. After all, this submarine is still at sea for the first time, and it is already a very good performance to be able to reach an area within 500 meters of the launch position after sailing at full speed underwater. Looking at the periscope that was gradually moving away, Qingying snorted lightly and said, "The underwater trial of the submarine seems to have basically been successful. Thank you, Mr. Khedira. ”

"No, it is my greatest honor to serve His Highness. After the submarine returns to the dock after completing the sea trial, I will immediately make further improvements according to the state of today's sea trial, and I will definitely make His Highness 100 percent satisfied with the next submarine. Khedira, who almost put himself on his own, said with a dry smile.

A few minutes later, the submarine stopped at a distance of 1000 meters from the target ship; The sea breeze howled, and the black and blue waves washed the mirror surface of the periscope from time to time. After a short time, a white waterline suddenly emerged from more than 100 meters in front of the submarine, and moved forward at an extremely fast speed; Before the long needle on Qingying's pocket watch had turned a full circle, the white line suddenly sank into the bottom of the target ship's hull amidships. Qingying looked at it for a long time, and only when she was completely sure that there was no white line on the other end of the target ship, did she breathe a sigh of relief.

Turning his head, he was greeted by Khedira's face smiling brighter than a chrysanthemum; Flick, on the other hand, lifted his glasses, and there was a slight smile in his eyes behind the mirror. Qingying coughed lightly and said, "Mr. Khedira, I must admit that the submarine you designed has achieved no less success than the American Holland submarine. However, its performance is still a little low, and what I need is a more powerful submarine! ”

"I wonder what else His Highness needs from His Highness Dao? I think this submarine is already very good in terms of firepower and maneuverability. Seeing Qingying's serious expression, Khedira also put away the smile on his face, and said with a straight face.

"First of all, the firepower of this submarine is not satisfactory. The only weapon it used to attack the enemy was a 450 mm torpedo tube in the bow; In addition to the original torpedo in the torpedo tube, there was only one torpedo in reserve, which was still quite lacking in both the density of fire and the effectiveness of sustained combat. On the next submarine, I would like it to be equipped with 2 450mm torpedo tubes and be able to carry a total of 6 torpedoes. Qingying said while recalling the performance data of the German U-boat in the future.

Khedira nodded. The person standing in front of him is the owner who pays him directly, and the only thing he needs to do is to make a design that satisfies him according to his wishes.

Qingying paused, and then said, "In addition, its mobility can only be regarded as barely qualified, and it has not reached the level that I really expect in my heart. The surface speed of 7 knots is still a bit low, and the endurance of this submarine is probably not much higher, right? If the next submarine is capable of reaching a surface speed of more than 10 knots and has a surface endurance of 2 to 3 thousand nautical miles, then the maneuverability of such a submarine is quite satisfactory. According to Qingying's estimates, if a 200-ton submarine wants to reach a speed of 10 knots, then it needs an engine of about 160 horsepower, and after a few years of diesel engine technology maturity, 160 horsepower is also an easy power to achieve.

"The endurance thing is relatively easy to solve. Since the submarine was only experimental, I only set aside 5 cubic meters of gasoline storage compartment for it, and 4 tons of gasoline was only enough for it to sail more than 1,000 nautical miles. If I want to pursue endurance, there is no technical obstacle, I just need to change the drawings. As for speed, as long as Benz and Daimler can provide enough engines, there is no problem. Khedira said after a moment of thought.

"And how long will it take you, Mr. Khedira, to build this submarine with two 450 mm torpedo tubes, a speed of 10 knots, and a range of 3,000 nautical miles?" Qingying asked.

Khedira replied: "Based on the experience of this submarine, if these characteristics are to be achieved as expected by His Highness, then preliminary estimates will be that its tonnage will reach 220-260 tons. Due to the increase in the number of torpedo tubes, the internal structure of the torpedo tube has to be completely disrupted, and I strive to present the finished product to His Highness as soon as possible within this century. Speaking of this, he glanced at his eager old partner next to him, and said, "Shut up Flick, the first time I designed this kind of dual-powered underwater weapon, I was naturally a little unskilled in many places; And now, I have basically mastered all the points of handling this little toy, and the progress of the work will definitely be much faster than the first time! You guy, go back and draw the design drawings of the merchant ship honestly! ”

Hearing Khedira's assurance, Qingying's mood in her heart also relaxed. He smiled and said, "When I return to Berlin, I will ask my father to set up a Baltic Fleet, independent of the High Seas Fleet, to be responsible for coastal defense and support the army; And this kind of hunter who dives deep underwater is the core and main force of this detachment! At that time, my shipyard in Ninhagen will receive a large number of orders from the Navy, and you, Mr. Khedira, as the chief designer, will extract considerable dividends from it! ”

At this time, Qingying had already sketched a brilliant blueprint prospect in his mind: as long as he could have a batch of submarines with good performance on the eve of the outbreak of war, it would be enough to change the maritime pattern of the two camps!

Before World War I, although the great powers paid a certain amount of attention to submarines, they were still far from realizing what a terrible threat they would pose to surface ships because submarines were still not fast and could not run far. Therefore, with the exception of the German battleships, which had always focused on protecting and damaging the German battleships, and the Iron Turtle of the United States, which was equipped with 14-inch guns, the underwater protection of all the capital ships of other countries was miserable, and even a small dose of underwater explosives could not withstand the explosion.

The French battleships were tilted in their hulls, and their freeboard was tall and mighty; Although this design gives them flexible steering and excellent roll cycles, the direct consequence is that their center of gravity is too high, their stability is very poor, and they are very easy to tip over as soon as water enters. In the historical Battle of the Dardanelles, two French former dreadnoughts made a gorgeous 180-degree roll when they landed after eating the torpedoes of a Turkish submarine, and completely disappeared into the sea in only 5 minutes. In the era of dreadnoughts, the French still followed this kind of pit design, and the "France" that ran aground and sank in 1922 is the best example.

As for the battleships of the British, their underwater protection is even more soaring! On the night of October 27, 1914, a small old mine came into close contact with the British super-dreadnought "Daring". The mine was very small, containing only 180 pounds of explosives, which translates to only 81.5 kilograms, and it was also very old, and it was filled with less powerful cotton wool, which the Japanese Navy had already used in the Sino-Japanese War 20 years earlier. And the final result was a big surprise, the steel giant ship with a standard displacement of 22,200 tons was sunk by such a mine! And even the least powerful torpedo at that time could have caused much more damage than this one! Therefore, as long as the warships of the Entente countries were hit by torpedoes fired from submarines, almost all of them, except for a few large ships, could be knocked out in seconds with a single mine!

What the? You say that the underwater speed of the submarine is slow, and even if the target appears in the periscope, it is difficult to occupy the attack position of the torpedo in the face of a dreadnought that is three times the speed of the submarine? This statement is indeed true, but if a submarine wants to attack the enemy's capital ship, it does not necessarily have to be on the sea. Submarines can infiltrate enemy military ports and carry out the deadliest attacks on enemy battleships that are moored in place! In the weeks following the outbreak of World War I, naval ports failed to establish a system of prevention to prevent enemy submarines from slipping in!

At this time, the yacht had returned to the harbor after the observation. At some point, the submarine appeared next to the side of the yacht, exposing half of the conning tower to the surface like a shark with its back fins exposed. Standing on the dock again, looking at this rather comical scene, Qingying felt slightly; Just as he was about to give the submarine a name, one of his bodyguards walked quickly towards him, and then said: "Your Highness, Your Majesty, please return to Berlin immediately!" ”

Thanks to nkj8084 for the tip, now the plot is going to unfold gradually.,Roll and ask for collection.