Chapter 875

Conventional powered submarines use diesel engines in the water surface state or vent pipe state, and can have a endurance of thousands of nautical miles. When they go underwater, they can only use batteries. In this way, the underwater navigation time is very short. If they sail at full speed, they can consume all the power in an hour. If they sail at low speed, It only lasted for dozens of hours.

Therefore, the combat performance of conventional submarines is not strong. Once the power is exhausted, they have to float to the vent pipe state. Once the vent pipe is exposed, they will be found and vulnerable to attack.

But nuclear submarines are different.

Relying on the energy provided by the nuclear reactor, the nuclear submarine has almost unlimited endurance. In the whole service life, it can change the nuclear fuel at most once. Therefore, it can sail underwater for a long time.

As for the oxygen needed by submarine soldiers underwater, it is not difficult for nuclear submarines. It can be obtained by electrolytic water, which is quite easy.

The endurance of nuclear submarines depends entirely on their own endurance.

The high performance of the nuclear submarine comes from the nuclear reactor. The fission of nuclear raw materials generates heat. These heat are taken away by the water flowing through the reactor core, just like boiler water. These water are taken outside to form the primary circuit. Through heat exchange, the water in the secondary circuit is heated, and the water in the secondary circuit is turned into steam to drive the steam turbine.

Structurally, it is the same as a warship, except that the boiler is made of nuclear raw materials.

In this way, two circuits are also taken, that is, for the sake of safety, the primary circuit and the secondary circuit are isolated to avoid the threat of radioactivity.

When the nuclear reactor is running, the primary circuit needs a water pump to continuously circulate these cooling water, otherwise the heat of the reactor cannot be taken away in time, and problems will occur. This water pump is an important noise source on the submarine.

Even if the submarine does not start and the propeller does not rotate, the water pump must be in operation. Unless the reactor is shut down, the submarine will have no energy.

This noise is easy to be found. Therefore, later submarines began to study natural circulation reactors. They do not need this pump to circulate by themselves according to the density difference of water. Of course, the technical level required is very high.

Now, this underwater submarine is the victor class of bear country.

Victor class, also known as class 671, belongs to the second generation attack nuclear submarine of Xiong Guo. It mainly undertakes the tasks of attacking enemy surface ships, damaging enemy maritime traffic lines, attacking merchant ships and laying mines. In addition, it can also perform anti submarine and escort tasks.

After the first nuclear submarine was commissioned in 1967, dozens of nuclear submarines have been built one after another.

Compared with other nuclear submarines, its size is small and its displacement is less than 5000 tons. Such a small nuclear submarine has good mobility and can also move flexibly in shallow water. Therefore, this time, it secretly came to the military port of the Han state for observation.

Although it floats up to the periscope for in-depth observation during the day, it is not afraid of anything. Relying on the backward anti submarine level of the Han country, it can't be found at all. Even if it is found, the Han people can't do anything to him. He just swaggers away, and the Han people can't do anything with it.

It can only come during the day. How to take photos at night?

On the submarine's command tower, Captain Ivanov carefully observed the other party's military port through the periscope. At the same time, a camera linked with the periscope was taking photos.

It's really boring. If the Chinese submarine comes out, follow the other party for thousands of miles, and then scare the other party, it will be fun!

Now, the cold war continues. The submarine soldiers of bear country like to fight underwater with the submarine of Eagle country. From time to time, there is a terrible and crazy Ivan action, which is called a pleasure.

On his side is the sonar soldier. The sonar soldier is listening to the movement outside. Although there are ships around, there is no need to worry about finding his own side. They are just listening.

Suddenly, a famous soldier frowned: "five nautical miles away, a target has changed its course and is coming to us."

As sonar soldiers, they should have a pair of sharp ears. This famous sonar soldier is even better. He heard that the ship changed its direction. Then, after listening carefully for a few seconds, he couldn't help saying, "the target is an R-type submarine."

The 033 submarine of the Han state is the imitation r-submarine of the Xiong state. The sonar soldiers on the submarine can easily distinguish it. It must not be the r-submarine of the Xiong state, that is, the r-submarine of the Han state.

Ivanov's eyes left the periscope and said, "attention, put away the periscope, dive to a depth of 30 meters, double cars, advance three."

Now that the other party has found out, the task here is over. Leave here.

With his orders, the sailors inside the submarine operated at their own posts. The marine engineers pushed the operating rods and the propeller at the tail to rotate and stir the sea water, and the submarine began to accelerate.

The horizontal rudder of the bow began to move, and the submarine slowly sank its head and dived into the deeper water.

After all, this is near the port. After a short dive, the body of the boat is level again. This action is very stable. If it is an emergency dive, it will be much more exciting. Those sailors who have nothing to do will run to the bow in front to increase the gravity of the bow and let the submarine tilt down as soon as possible.

"Right rudder." Ivanov gave the next order, turn around and return!

When the propeller at the tail starts, the noise is even louder. On the 033 submarine that followed, the sonar soldiers shouted anxiously, "the target has started, the speed has increased, and it is turning!"

The goal is to slip away!

The boat shouted loudly, "come on, full speed, give me full speed!"

Once the other side speeds up, he can't catch up. When the nuclear submarine is underwater, he can easily go to 30 knots, while his submarine can only go to 13 knots at full horsepower. If he doesn't catch up with the other side in the initial stage of acceleration, the other side will escape.

At this time, the captain found that he had made a mistake and didn't report to his superior!

However, he did not have time to report. After all, when he just found out, he could not report immediately. He had to identify and confirm that it was the enemy before he could report. If he made a mistake, there would be a big oolong.

Now, if you don't stop each other, you can only watch each other slip away!

With his command, the propeller at the tail rotates at high speed, and all the batteries are working. The 2700 HP motor drives the propeller to rotate at high speed and catch up!