Dominate South Asia

After getting off the car, Tasnim looked straight at the submarine.

It has an elongated teardrop shape, a tapered tail, a hull rudder at the front and a cross-shaped tail operating surface at the tail, with four tail rudders and a single shaft and single propeller.

Since it does not need to sail on the water, the submarine is completely designed for high underwater speed. From the appearance of the hull, it can be seen that only by using a nuclear reactor can the submarine's unlimited underwater endurance be guaranteed, which is what submarine soldiers want most!

The hull number is 403, which is already an improved 091 nuclear submarine.

Continuing to move forward, Tasnim saw the surface of the hull, which did not seem to be steel, and suddenly there was a surprise in his eyes.

"Is the surface of this submarine already covered with silencing tiles?" Tasnim said.

Silencing tiles! When a submarine is underwater, the biggest means of detection is sonar. Sound can be transmitted in water. If you want to detect the enemy, you need to have a highly efficient sonar, and if you want to avoid being discovered by the enemy, you need to have a means to reduce your own noise.

All mechanical equipment is placed on a shock-absorbing seat, and various means such as advanced propellers are used. One of the most important is to lay anechoic tiles!

On the surface of the submarine, a layer of underwater sound-absorbing material is used. This material is almost elastic. When sound waves pass through, the elastic sound-absorbing material will deform, and it takes a process to restore to its original state. In this process, the deformation lags behind the change in stress, so that the sound energy is converted into heat energy and lost. In this way, the sound of your own submarine can be reduced. At the same time, when the opponent's active sonar comes to detect, the echo of the active sonar can also be weakened, reducing the detection distance.

Because this sound-absorbing material is laid piece by piece, just like laying tiles on the roof. Therefore, this sound-absorbing material is figuratively called anechoic tiles.

In World War II, Germany began to develop the technology of anechoic tiles. During the Cold War, the United States and the Soviet Union competed for hegemony, and each developed its own anechoic tile technology. After the 1970s, both sides began to lay their own anechoic tiles on their submarines.

In addition to the United States and the Soviet Union, other countries such as Britain and France are also developing their own anechoic tile technology. After all, this thing is a confidential technology of various countries.

China's technology is very backward, which is also a concern of President Muhammad. If the submarine makes too much noise, it will be the same as having it or not.

Now, seeing that the surface of this submarine is laid with anechoic tiles, it means that this submarine still attaches great importance to its own noise level.

"Yes, the first two did not use anechoic tiles, starting from our third one. There are anechoic tiles." The captain of this submarine came to receive him. Because he was underwater for a long time, he was different from other soldiers. The captain in his forties, with oily and fair skin, looked at the Pakistani in front of him and said quietly: "It's just that there are still some problems with our silencing tiles that have not been solved. After sailing on the sea for a period of time, some silencing tiles began to fall off. After returning, they need to be re-laid."

In front of Pakistani friends, such secrets are not secrets.

Silencing tile technology, in addition to being able to achieve silencing, is also very complicated to lay. If the process is not in place, it is easy to cause falling off. This is a problem encountered by both the United States and the Soviet Union.

You can look at the pictures of Soviet submarines. When floating on the sea, you can often see scars on the surface of the submarine, that is, the silencing tiles on it have fallen off. This problem was not completely solved until the disintegration of the Soviet Union, let alone the current China.

It's not terrible to fall off. Just come back and paste it again.

"Please get on board." The captain of the Chinese submarine said.

Submarines are different from other warships. There are no steps here. From the front hatch, you can climb down directly along the ladder.

Several Pakistani naval officers followed the Chinese captain with great interest, watching everything inside.

"The torpedo compartment is in front." Since we came up from the front, we naturally had to look at the equipment in front first.

Although the structure of conventional-powered submarines is different from that of nuclear submarines, there is one thing in common, that is, the bow is the torpedo compartment and the sonar compartment.

Generally speaking, the upper part is the torpedo tube and the lower part is the sonar array. Now, after entering the torpedo compartment, Tasnim frowned.

Loading is still done manually, and even manual equipment such as gourds can be seen. Such loading efficiency is undoubtedly very low. Now, Pakistan's two TR-1700s have achieved automatic loading of torpedoes.

For a long time, China has been facing a military blockade from the West, and it is impossible to obtain advanced Western technology. As for submarines, there are only old R-class submarines in China, so many technologies are backward, and torpedo loading like this, when it can be operated manually, is obviously not equipped with advanced automatic loading equipment. In China, the labor cost is very low.

It seems that even if the technology of this submarine is introduced, it must be improved by using Western equipment!

In the torpedo compartment, you can also see some berths. The space in the submarine is limited, so these empty places are very comfortable for sleeping, saving you from having to squeeze into the hot berth.

Hot bunks are a special name for submarine soldiers. When there is not enough space inside the submarine, the sleeping places will be stretched. In this case, not everyone has a fixed bed to sleep. In many cases, two or even three people can have a berth. If there are three people in one berth, there will always be someone sleeping on the berth every eight hours, so it is called a hot bunk.

Sleeping with these torpedoes that can explode at any time requires courage.

"The middle is the command area." The captain continued to take the personnel to visit. The hatches were not big, and each one was round. You had to raise your legs to step through. After all, there were many dangers underwater. If an accident happened, such as a cabin flooded, you had to close the hatch in a short time to isolate the cabin to prevent the submarine from being unable to float up forever due to insufficient reserve buoyancy.

Submarine soldiers must have a slender figure. If they are fat, it will seriously affect the passage.

Looking at the aisle, there are all kinds of pipes, switches, and instruments. Hussein, the eagle in the sky, can't see them all. Each one is very interesting.

Tasnim is observing the internal structure of the submarine to see if it is reasonable.

The middle part is the place with the least noise. The sonar room and command room are all here.

If it is a conventional submarine, the lower part will be gone. It is occupied by batteries, and here, it is obviously much wider.

Opening the door of the sonar room, you can see an old-fashioned screen and huge earplugs on the iron console.

"Is there only one kind of sonar?" Tasnim asked.

"Yes, our submarine uses the domestically produced DUUX-5 passive sonar." The captain said.

China is far behind the West in electronic technology. When developing nuclear submarines, many equipment could not be equipped in time. These submarines were also upgraded in batches.

Tasnim couldn't help but shake his head: "It's better to have a towed body sonar to better detect the enemy."

Submarine mainly relies on listening to sound underwater, and the more array units there are for this sonar, the farther they are distributed, the easier it is to find the target.

Helicopters drop sonar buoys to form a large array, and for submarines, in addition to using the sonar on the bow, they can also be equipped with towed body sonars, which can be towed far behind the submarine to increase the detection distance exponentially.

"We also want to have towed body sonars, but..." The captain of China also smiled bitterly.

Good things, who doesn't want to have them? The problem is that they can't be made domestically! In fact, the first towed body sonar of the Chinese Navy was equipped on the Luhu-class destroyer, and it was made of French goods.

When he walked into the command tower, Tasnim felt that the equipment inside was not as advanced as his diesel-electric submarine. He couldn't help but secretly wondered in his heart that if it was really introduced, he would have to replace it with Western electronic equipment on a large scale!

Continue walking to the rear cabin, it is the power compartment. When using nuclear power, the submarine can almost sail endlessly underwater. The specific self-sustaining capacity depends on the endurance level of the crew. The Americans once made an underwater circumnavigation around the world. When they returned to the home port, the crew inside were almost carried out.

In the submarine, the engine soldiers are the hardest, this is the hottest place, and in order to maintain the power system, the engine soldiers are almost shirtless and covered in oil.

And here, because of the change to nuclear power, the engine soldiers' work is also very easy. It's nothing more than monitoring the nuclear reactor to see if it is operating normally, whether the steam pressure is normal, whether the turbine is working normally, and when necessary, start the emergency unit, that's it.

Of course, their pressure is the greatest. After all, this is a nuclear reactor! Once a failure occurs, such as a nuclear leak, they will be the first to bear the brunt, and even risk their lives to repair it.

The huge steam turbine unit is placed on a shock-absorbing base, and all the pipes are wrapped tightly. In terms of mechanics, Tasnim can't really find any faults, except that the electronic equipment is too backward!

"We use a pressurized water reactor with a power of 90 megawatts." The captain said: "It can drive our nuclear submarine to a speed of more than 25 knots."

All the charm of nuclear submarines lies in this nuclear reactor, which provides a powerful energy source. Once a diesel-electric submarine dives, it can't even eat hot meals. It must save all electricity, while nuclear submarines can continue to use electric stoves to cook hot meals. The oxygen in the submarine is not produced by chemical devices, but directly by electrolyzing water. (To be continued ~^~)