.Compared with the North Carolina, the acceleration performance of the Shark is not outstanding.

When Yang Yuanfan sent the message, the speed of the "Shark" had reached twenty-seven knots, and it took one minute and thirty seconds to accelerate to thirty-five knots.

The acceleration performance is not satisfactory, mainly on the power system of the "Shark".

Although like the North Carolina, the Shark also uses a natural circulation pressurized water reactor, that is, the first loop is naturally circulated and there is no need to use a water pump. The cooling water in the second loop is driven by a water pump, but the Shark's reactor's output power is only 20% of the maximum output power in the natural circulation working state, making its maximum quiet speed only sixteen knots.

This creates another problem: after the second loop starts to work, it takes a long enough preheating time to achieve the maximum output power.

For submarines, acceleration capability is more important than maximum speed.

Because submarines have strong concealment, the battle between submarines is often an encounter battle, so before receiving the enemy, the submarine must put secret activities first. For nuclear submarines, reducing their own noise is the primary factor in ensuring secret activities. The slower the navigation speed, the lower the self-noise of the submarine. After receiving the enemy, the submarine must try its best to seize the favorable attack position, and the speed must be increased as soon as possible.

In the tactical performance of submarines, acceleration capability has become a very important technical indicator.

For confidentiality considerations, no country will announce the acceleration performance of the submarine, and the data that is often disclosed with no practical significance, such as maximum speed and maximum safety dive depth.

But when facing torpedoes, the submarine's acceleration ability is not worth mentioning.

No matter how advanced the submarine is, it is limited by factors such as displacement, appearance structure, work-to-weight ratio, and acceleration capabilities are far inferior to those of the contemporary anti-submarine torpedoes. For example, the mk48-7 torpedo can accelerate from stationary to 55 knots within 25 seconds, while the "Sea Wolf"-class attack nuclear submarine with the most outstanding maneuverability of the US military, takes at least four minutes and thirty seconds to accelerate from stationary to 35 knots.

The relationship between submarines and anti-submarine torpedoes is like the relationship between fighter jets and air-to-air missiles.

Only when the distance is far enough, the submarine can avoid the torpedo by accelerating its navigation, to be precise, leaving the torpedo attack area before being hit by the torpedo.

When the distance is not far enough, the submarine's acceleration ability is not as good as the torpedo.

After being attacked by two mk48-7, the "Shark"'s escape behavior seemed weak and powerless. Zhou Yusheng had no intention of escaping the torpedo attack range, and he placed his hope on the torpedo jamming bomb.

When casting a torpedo jamming bomb, the earlier the better.

The torpedo jamming bomb is divided into two minutes, one is passive and the other is active. The biggest difference between the two is whether to deceive the torpedo by creating an acoustic fake target similar to the boat.

According to the method of casting, torpedo jamming bombs are divided into throwing and tow-dropping. The former is released by a submarine, which is used to interfere with the torpedo by creating a large number of bubbles; some more advanced jamming bombs can also create bubble curtain walls similar to this boat, allowing the torpedo to abandon the boat and attack the bubble curtain walls. The latter is used to torpedo by emitting noise similar to this boat, or to create bubble curtain walls to deceive the torpedo.

Although towed torpedo jamming bombs are more advanced and more deceptive, they conflict with the towed sonar on the submarine and have high requirements for the submarine and casting conditions.

In actual combat, as long as the submarine is maneuvering violently, such as high-speed navigation, sharp turn, sharp dive, etc., it is not possible to use towing torpedo jamming bombs, otherwise the towing rope is likely to wrap around the propeller or be involved in the jet thruster. Because the submarine often maneuver violently after being attacked and try to avoid torpedoes, it is still a reliable and less reliable throwing torpedo jamming bomb.

Zhou Yusheng had no choice problem because there were only throwing torpedo jamming bombs on the "Shark".

According to the plan, the Shark will return to the Dalian Shipyard when the crew completes this mission and undergoes a rest, and install some tactical enhanced equipment, including the towed self-defense interference system. After the mid-term overhaul, the propeller will be replaced with a pump jet thruster. By that time, the Shark will fully meet the design indicators.

When using throwing torpedo jamming bombs, you must seize the opportunity to release them.

It's not OK to be too early, it's not OK to be too late.

It's too early, the bubble curtain wall formed by the interference bomb is not large enough to completely block the submarine, and the torpedo can still catch the submarine. Because the torpedo has been approaching the bubble curtain wall for a while, and the bubbles will dissipate in the sea water, so when the torpedo approaches, the density of the bubble curtain wall is greatly reduced, and it cannot effectively block the sound waves emitted by the torpedo guided hair, nor can it block the noise emitted by the submarine, thus losing the interference ability.

It was too late, and the bubbles gathered together, and before they could dissipate, the torpedo passed through the bubble curtain wall. Because most anti-submarine torpedoes have the ability to search again, that is, after the target is lost, the search program will be automatically started to find the next attack target. The submarine is behind the bubble curtain wall and is easily discovered by the torpedo, so the interference bomb has almost no effect, which makes the submarine waste valuable confrontation time.

When should the jamming bomb be launched? There is no unified standard, and it depends entirely on the captain's experience and intuition.

Zhou Yusheng has no practical experience, but has very keen intuition. He has practiced related tactics many times in previous confrontation exercises.

Zhou Yusheng did not have much confidence in the interference bomb on the "Shark".

It’s not that there are not enough jamming bombs, but that they are not advanced enough. According to the division standards of the US military, because the jamming bombs on the Shark can only make bubble curtain walls and cannot simulate the acoustic characteristics of the boat, they can only be regarded as the second-generation jamming bomb at most, and even the third-generation jamming bombs equipped with the Los Angeles class cannot compare with the fourth-generation jamming bombs equipped with the Virginia class.

Relying solely on interference bombs will definitely not last long.

Zhou Yusheng was not desperate because he knew that as long as he could create a "fake target" for those two torpedoes, the "Shark" could escape danger.

This "fake target" is not far ahead of the "Shark".

"One minute and thirty seconds..." Lu Chengfeng's hand holding the stopwatch shivered a few times, "Old Zhou, it's almost done."

"Wait a little longer." Zhou Yusheng pressed his hands, closed his eyes, and began to mutter silently.

Mu Haoyang and Li Xiaoming were a little surprised, but they didn't bother Zhou Yusheng.

At this time, Yang Yuanfan returned to the command cabin sweating profusely, and was wearing a radiation-proof suit he wore when entering the reactor cabin. It seemed that he was also very anxious.

Yang Yuanfan did not bother Zhou Yusheng, walked to Mu Haoyang and asked, "How is it?"

"We're done with less than a minute and a half."

"It's only been more than a minute?"

Mu Haoyang glanced at Yang Yuanfan and showed an unknown smile.

"Old Yang, why haven't you released the interference bomb?" Li Xiaoming leaned over.

"It's not the time." Yang Yuanfan took off his radiation-proof suit in a few seconds and said, "Don't worry, Lao Zhou has a clear idea. Now we can only believe him."

"How do you believe it?"

Yang Yuanfan glanced at Li Xiaoming and said, "Three months ago, during a joint anti-submarine exercise held in the South China Sea, we were incorporated into the Blue Army and played the role of imaginary enemy. Under Lao Zhou's command, we not only overturned the underwater anti-submarine submarine formation led by a 093 team, but also avoided six anti-submarine torpedoes in succession, and finally 'sank' the Red Army's flagship, allowing the 'Shark' to show her face beautifully. Before we set off from Yulin Port, the captain of the 093 came to the door and invited us to have a big meal, trying to learn from Lao Zhou's stealing skills."

"Did you eat well?"

"I went to the best hotel in Sanya, which cost the guy a few months of subsidy, which is very good."

"You are still in the mood to say something about food?" Li Xiao understood Yang Yuanfan and Mu Haoyang and said, "This time I am facing not 093, but the US military."

"If we don't believe Lao Zhou, what else can we do?" Yang Yuanfan smiled and said, "If we were destined to hang in this ghost place, we should also go to see the King of Hell with a smile, so that the little ghosts in the underworld know that we are submarine soldiers and will never frown at Yasha!"

Mu Haoyang patted Yang Yuanfan on the shoulder and gave him a thumbs up.

Li Xiaoming sighed, shook his head, and stopped answering Yang Yuanfan. He was not afraid of death, but he didn't live enough and didn't want to die young.

At this time, Zhou Yusheng opened his eyes and looked at Lu Chengfeng.

"Fifty seconds...forty-five seconds..."

Zhou Yusheng's brows jumped a few times, and asked Meng Guangyang, who was holding his headphones tightly and staring at the sonar display, "Where is the 'North Carolina'?"

Meng Guangyang was startled and said quickly: "At the two o'clock direction, thirty-two chains, the target is still sailing northward, with a relative speed of fifty-four knots."

"How fast is our speed?"

Lu Chengfeng looked up and said, "The thirty-two sections are still increasing."

Zhou Yusheng recited a few words silently before suddenly saying: "The right rudder is full, the head and tail is balanced, activate the attack sonar, and prepare to illuminate the target."

Li Xiaoming widened his eyes and Yang Yuanfan was also startled.

"Old Zhou..."

Zhou Yusheng glanced at Yang Yuanfan and said, "We have to show you a little bit of color. We have been beaten, so we can't help but fight back, right?"

Yang Yuanfan gritted his teeth and said, "Do you need to get the torpedo ready?"

Zhou Yusheng shook his head and without saying much, he turned his gaze to the heading display on the navigation console. The numbers on the screen are changing rapidly, indicating that the "Shark" is turning at the maximum angular speed.

When the reading jumped to 250, Zhou Yusheng nodded to Lu Chengfeng.

The navigator did not hesitate and rushed over with one step, snatched the rudder, and corrected the submarine.

"The attack sonar is activated and continuously illuminates." Zhou Yusheng turned his head and said to Xia Hongyu, "Recalculate and enter the attack parameters into the torpedo."

After the attack sonar started, the Shark began to shake rhythmically.

Because when he started a sharp turn, Mu Haoyang grabbed the support steel pipe next to the tactical podium, so he immediately felt the obvious vibration caused by the hull under the reaction of sonar.
Chapter completed!