Transmigrated as the Crown Prince

During World War I, when submarines developed on a large scale, and even during World War II, which reached its peak, the submarines at that time could not be called real submarines. They were more like ships that could dive into the water, so it was more appropriate to call them submarine ships. At that time, The linear shape of submarines is basically ship type (conventional type), and their appearance is like a ship. Leonardo da Vinci is said to have conceived of a ship that could sail underwater, but a ship with this ability was considered evil, so he did not draw the design.

The shape of most submarines in World War I and World War II was not the same as modern submarines. They looked closer to surface ships. In order to reduce wave-making resistance during navigation, the bows of the boats also adopted a bow shape similar to that of surface ships. These ship-type submarines more often sail on the water like surface ships. Therefore, a major technical characteristic of ship-type submarines is that the surface speed is greater than the underwater speed.

Conventional submarines from World War I to the early days of World War II can only be said to be the prototype of submarines. Their sailing time on the surface can account for about 90% of the total mission time. It is not until they are close to the target that they dive into the water to conceal themselves from the enemy, or Dive into the water to avoid an attack. With this kind of appearance defect and the not-so-advanced battery, the underwater operating power of the submarine is really unsatisfactory. In most cases, it can maintain a speed of about 5 knots.

In terms of the design of the new "Tiger Shark", Yannick drew heavily on later conventional submarine designs.

First of all, this "super submarine" completely abandoned the sharp bow design and adopted a unique double-shell structure whale shape to reduce fluid resistance. It became the first ship in the world whose surface speed was not as fast as underwater speed.

The more rounded bow brings an additional benefit to submarine designers that was previously unachievable, that is, part of the sonar system can be installed at the position with the widest coverage angle of the submarine, so that the submarine can be farther and farther underwater. Having discovered his target early, the only blind spot left was the rear of the submarine.

The power of this sonar system is that it can aim torpedoes without a periscope, which increases its safety.

In order to reduce the resistance during submersion, the entire submarine, except for the bridge (command station), looks very neat and clean, with no more miscellaneous gadgets. Even the small radar antenna and front horizontal rudder are foldable. This not only increases the speed of the submarine to the limit, but also reduces the irregular parts that produce more noise underwater.

This "super submarine" has improved more than just its appearance.

In terms of power, in addition to two "MAN" diesel engines (each with 1,500 horsepower), the "Tiger Shark" is also equipped with 380 maintenance-free lead-acid batteries, forming a huge super battery weighing 270 tons. It is a submarine It is the single functional component that occupies the largest space and has the largest displacement, consuming at least about 10% of the displacement of the submarine.

With this new powertrain, the "Tiger Shark" can reach an astonishing underwater speed of 5 knots. The endurance time can exceed 100 hours at a silent speed of 5 knots (using the cruising motor). Just float to the depth of the snorkel every once in a while to recharge. Fortunately, it has a larger space and has living facilities such as food refrigerators, shower facilities and even fitness equipment that other German submarines do not have, which greatly alleviates the crew's trouble of being unable to ventilate frequently.

The first thing that was improved in terms of silence was the propeller, which abandoned the currently popular three-blade propeller and adopted a seven-blade large side-rotating propeller for the first time.

In the battle between submarines and surface ships, submarines are always at a disadvantage. For submarines, constantly improving their silent performance is the basis for their continued existence; when underwater noise can be compared with the ocean background noise When comparable, it will become extremely difficult for surface warships to detect underwater submarines.

The seven blades are asymmetrical, not prone to resonance, and have low noise. The propulsion speed of a three-blade propeller must reach the same speed as a seven-blade propeller, and the rotation speed must be at least 10 times higher. High speed will cause large noise changes, and the noise will be tens of decibels higher at a faster speed.

Although there is no multi-axis linkage machine tool of later generations to achieve fine processing, it does not mean that it is impossible to process the seven-blade side-inclined propeller without this thing. It is just that the silent effect of the finished product is not as good as that produced by using a multi-axis linkage tool machine. Just quality products.

And in turn, the underwater detection technology of various countries in the world today is not as incredible as that of later generations. Unless you see the submarine's periscope or snorkel, everyone can only rely on sonar to roughly locate the submarine's location. Then the explosion radius of the depth charge is used to make up for the embarrassment of insufficient detection accuracy.

At present, the underwater speed of submarines in various countries is only four or five knots at most. Now such a "super submarine" with a speed increased by three to four times is about to emerge, which means that the previous detection methods are useless.

By the time the enemy detected its approximate location and dropped depth charges, the "super submarine" had already left the depth bomb's destruction radius.

Of course, there are more ways to silence than this. At the end of World War II, under the attack of the powerful anti-submarine forces of the Allies, the German Navy's submarine force began to decline. German U-boats were sunk one after another.

In order to save the situation and reduce the number of U-boat losses, the German naval scientific research institution urgently developed a synthetic rubber sound-absorbing material called "Aliberich". By making this rubber material into blocks about 3 centimeters thick and sticking them on the surface of a U-boat, the stealth performance of the U-boat can be greatly improved. This piece of rubber material that can be pasted on the surface of a submarine is considered to be the world's earliest anechoic tile for submarines.

In later generations, the thickness of anechoic tiles generally reached 150mm. Yannick did not know how effective the German 30mm thick anechoic tiles could be, so he increased the thickness of the anechoic tiles to 80mm.

Because the "Tiger Shark" has a double-shell structure, the inner and outer shells are equipped with anechoic tiles. The outer anechoic tiles are mainly used to deal with active sonar, while the inner anechoic tiles are mainly used to reduce noise. Coupled with the installation of soundproof and shock-absorbing bases for engines and equipment with large vibrations internally, it can be said that after these efforts, this submarine can be said to be the quietest submarine today.

Since the size of the submarine is larger, it is thought that it can carry more supplies and more ammunition. Therefore, the full load displacement of this "Tiger Shark" has reached an astonishing 2,700 tons. It is definitely a terrifying underwater giant. beast.

In terms of weapons, this behemoth has the powerful firepower of 6 torpedo launch bays in the forward position, and the more professional torpedo bay is equipped with a fashionable gadget such as a hydraulic torpedo reloader, allowing it to load 6 torpedoes in eight minutes. . Including the torpedoes on standby in the torpedo tube, it can launch 30 torpedoes in 30 minutes, which means that all the torpedoes it carries are used.

Yannick couldn't help but sigh. "I'm really looking forward to it. I don't know which unlucky guy will become its first prey."

Dönitz responded with a smile. "No matter who it is, everyone should feel honored. This is a super weapon that spans the ages. It's hard to imagine anything that can beat it."

Yannick chuckled inwardly, of course. The king of the seabed in later generations will be the nuclear submarine. In future generations, a strategic nuclear submarine can easily destroy any medium-sized country and severely damage any large country.

Speaking of nuclear submarines, Yannick thought of the nuclear energy research department in Area 51. Dr. Einstein's previous small reactor, which could only light up the light bulb of a building, was a complete success. It stands to reason that the next step should be to build a real reactor, but it happened to be caught up in this war. If the nuclear power plant was accidentally bombed by the enemy and turned into the German version of "Chernobyl", it would be more than worth the gain.

So Yannick could only put the nuclear power plant plan aside and let Dr. Einstein and the others continue to study nuclear power.

This is another challenge. After all, nuclear power and nuclear power plants are both nuclear fission. They are very different in terms of fuel, structure, and coolant. However, according to the original process of time and space, coupled with his support for German technology, Fire; it should be developed in less than three years.

The high-speed centrifuge that he had been waiting for was finally built, and the progress of Otto Hahn's nuclear weapons research team was accelerated a lot.