The "Adopter" and the "River Porpoise" received combat orders together, but Du Xinghua's face was much more complicated.

After entering the Yellow Sea, the "8111" seemed to be in a hurry and increased its speed to 16 knots. Du Xinghua had to let the "April" increase its speed to 16 knots and keep up with the pace of American submarines.

At this point, Du Xinghua has already confirmed that it was a "8111" class attack nuclear submarine.

According to the information provided by the Military Intelligence Bureau, all the improvements made by the "8111" class are to reduce navigation noise and improve the "quiet cruise" speed. The "Virginia" class's silent performance is not bad, and it can be regarded as the leader among nuclear submarines. The overall performance of the C97 class, which the Republic Navy is proud of, is the same as that of the "Virginia" class, but its service time is 17 years later than that of the "Virginia" class. This shows how obvious the United States has in nuclear submarines.

If it weren't for the rise of "all-electric submarines", it would be difficult for the Republic to surpass the United States in submarine technology.

Among the main performance of measuring the combat capability of submarines, silent ranks first. The noise generated by submarines during navigation mainly comes from three aspects: one is the noise generated during mechanical equipment operation, the second is the noise generated by thrusters, and the third is fluid noise. For nuclear submarines, the noise generated by mechanical equipment is the most prominent. Most nuclear submarines are equipped with "natural cyclic secondary pressurized water reactors". When submarines sail at low speed, the reactor first-level circuit works in a natural cycle, providing high-temperature and high-pressure steam for the steam turbine on the submarine, driving propellers or generators; when high-speed navigation, the reactor second-level circuit is started to operate with higher efficiency and provide greater propulsion power. Although the use of technologies such as "shock absorption:" can minimize the noise generated during reactor operation or reduce the noise energy transmitted outward, it cannot fundamentally eliminate noise, and it cannot fundamentally keep the submarine quiet.

Full-electric propulsion fundamentally solves "mechanical noise" because the battery does not need to output energy through mechanical movement.

The excellent performance of the "Swordfish" proves the effectiveness of "all-electric propulsion".

The appearance of the "Swordfish" also made the US Navy feel an unprecedented threat.

In the Fourth India-Pakistan War, the Indian Navy's "Destroyer" attack nuclear submarine and the second aircraft were sunk by the "Swordfish". If it were replaced by the US Navy, the results would not be much better. At that time, the US Navy "predicted" that if the ambushed was a US aircraft carrier battle group, even if the submarine that attacked the aircraft carrier in the counterattack, the aircraft carrier would not be spared. During the East China Sea War, the "predictions" of the US Navy were confirmed. The "Virginia" class "Hawaii" that entered the war zone encountered the "Swordfish" near the Okinawa Islands and eventually "sinked to the sea of ​​corpses."

Starting from 20177, the US Navy put the development plan of the "S1" future underwater combat platform in the front.

The best choice is an all-electric submarine. In 20199, the US Navy submitted a "Planetary Research Report" to the Pentagon for more than 2,000 pages. If the "x2 composite battery (equivalent to a composite battery) has been successfully developed as the energy carrier, if the new submarine's performance reaches the design indicators, the displacement will definitely exceed 15,000~:. If the attack nuclear submarine is lost, it must have ground flexibility. The cost will be too high. If the performance is not lower than that of the opponent's fully electric submarine, it must be used at least a ground power reserve unit that is twice as high as the x2 composite battery.

It has to be admitted that the US Navy has thorough research. The land used by the "Swordfish" is a level 8 composite battery!

The fully electric submarine has become "flowers in the mirror and moon in the water". The US Navy can only "find a different approach".

The 11" project was born. While continuing to promote the "S1" project, it uses various existing technologies to modernize and improve the "Virginia" level, striving to increase its combat capability by more than 50%.

In order to improve the "8111" level geosilent performance, General Electric (Marine Branch) has adopted a large number of advanced technologies.

First, the s9g tand DD| type pressurized water reactor is used to increase the self-circulation power of the first-stage circulation circuit by 50%, so that the submarine can increase the speed to 22 knots without using the second-stage circulation circuit (actually only 18 knots); secondly, the "three-stage shock absorbing floating valve" is used to reduce the "mechanical radiated noise" by at least 5 bens; thirdly, the electric propulsion technology is used to replace the traditional bearing propulsion system, so that the propulsion noise is reduced; fourthly, the "polyester composite silencer" is laid inside the power cabin to reduce the noise dissipation; finally, the "bionic silencer" with better performance is laid outside the hull to better absorb its own noise and reduce the intensity of the enemy's active sonar echo.

Through these measures, the "8111" class "Quiet Cruise" noise was reduced by 5 bays on the basis of the "Virginia" class, which was only 88 bays, which was equivalent to the "Swordfish".

In order to maximize combat performance, the "8111" class also uses many new technologies and new equipment.

For example, the performance of the hy-12 high-strength steel ground that manufactures pressure-resistant shells is about 25% higher than that of the hy-100 model used in "Virginia". With a slight increase in thickness, the maximum safe dive depth of the "8111" class reaches 56. When conducting the dive depth test, the 8111 boat set a record of "ultimate dive depth" of 788 meters.

In terms of combat capabilities, the "8111" boat surpasses the class attack nuclear submarine, which is comparable to the "Powder" class.

American submarines accelerated, but the "Attoria" cannot be

Keep up with the scalp.

Du Xinghua has received orders that if the US submarine threatens the aircraft carrier battle group or lands in a fleet, it can launch an attack without warning.

The problem is that at this time Du Xinghua has to face not one "8111" but at least three "8111".

Before receiving the combat order, the sonar of the sidewalk of the "April" detected two other suspicious targets. After comparing and analyzing the noise of the three targets, the sonar determined that it was another two to "8111" class attack nuclear submarines.

Although the "Attoria" can attack three targets at the same time, who can guarantee that there will be no fourth "8111"?

What made Du Xinghua very uneasy was that the US submarine not only did not pay attention to concealment, but instead deliberately exposed its whereabouts, as if it was intentionally letting the nearby submarines know their existence.

Very abnormal behavior.

What exactly do American submarines want to do?

3 The submarines exposed to their whereabouts do not pose much threat to the aircraft carrier battle group. Although the "8111" class is like the "Virginia" class, equipped with 12 vertical launch tubes that can carry anti-ship missiles, the maximum launch depth of the vertical launch system will not exceed meter. As long as the three "8111" class rise to the depth of the periscope, Du Xinghua will first launch the torpedo.

Obviously, these are 3 baits.

The US Navy is equipped with at least 12~8111 levels, of which 8 are deployed in the Pacific. The Peninsula War has been fighting for more than 20 days, and the US military has enough time to send the "8111" deployed in the Atlantic Ocean. Including the "Virginia" and "Sea Wolf" deployed in the Pacific, the US Navy has sufficient submarine force.

Looking at the battlefield information displayed on the big screen, Du Xinghua had to admit that his inference was correct.

3 The distance between the "8111" is maintained at about 50 kilometers. Even if the "April" battle is in a favorable position, it can only ensure that the "8111" that was discovered first is not sure to kill the other 2. The maximum submersible speed of the "8111" is likely to exceed 37 knots, or even close to 40 knots. Only by shortening the distance to within 2c kilometers, with a maximum speed of 70 knots, and a maximum range of kilometers can the electric torpedo with a maximum range of kilometers to catch up with the "8111".

How to fight?

Du Xinghua glanced at Rong Kangjian next to him.

The deputy captain shook his head and said, "The target does not mean to be close to the aircraft carrier battle group, and it is still hundreds of kilometers away from the designated war zone, so there is no need to rush to take action."

Du Xinghua smiled bitterly, but Rong Kangjian's answer was not unexpected.

"When will the battle begin?"

"Four hours later." Rong Kangjian glanced at his watch.

"Have you discovered our submarine?" Du Xinghua touched his chin.

"Not yet." Rong Kangjian smiled bitterly and said, "If you really want to hit, it is recommended to aim at a target and then dive at high speed to avoid it."

Du Xinghua nodded and said, "First down 5, tail up 5, diving depth 540, control the speed."

"Don't speed up?" Rong Kangjian asked, nodded to the helm's officer.

"There is no need for this." Du Xinghua operated on the control panel and called out the battle zone chart. "We were on the east side of the aircraft carrier battle group, and the US submarine deliberately advanced at a large speed, which clearly attracted our attention and diverted the anti-submarine forces. Then sailed 30 to 50 kilometers and entered the peripheral anti-submarine area of ​​the battle group.

If my guess is correct, the US submarine will slow down and turn after an hour to avoid entering the search range of carrier-based anti-submarine helicopters and anti-submarine patrol aircraft. We submerge in advance and continue to follow the US submarine. If the Americans dare to act rashly, we will launch torpedoes. If the Americans are honest and obedient, we will contribute to other submarines."

"You mean, are there other American submarines nearby?"

Du Xinghua nodded and said, "There must be some, and the number will not be too small. Hua Jianfeng is responsible for the anti-submarine operations of the combat group. Do you think he will ignore the threat of American submarines?"

Rong Kangjian shook his head with a smile.

"That's right." Du Xinghua smiled and said, "Hua Jianfeng is a cruel guy. If he knew that there were several American submarines moving east of the battle group, what would you do?"

"At least it will cause some trouble for American submarines."

"That's enough. We'll wait for the rabbit and let Hua Jianfeng serve us."

Rong Kangjian frowned slightly and understood what Du Xinghua meant.

"Prepare the communication buoy." Du Xinghua marked a new route on the chart. "After arriving on this route, release the communication buoy and ask Hua Jianfeng to send several helicopters, preferably an anti-submarine patrol plane."

Rong Kangjian didn't talk anymore and immediately called the correspondence officer.

For any submarine, anti-submarine helicopters and anti-submarine patrol aircraft are the biggest threats, because submarines do not have effective means to deal with air threats. Generally speaking, submarines will try every means to avoid anti-submarine helicopters and anti-submarine patrol aircraft. The most effective way is to escape before being discovered by anti-submarine helicopters and anti-submarine patrol aircraft. If the US submarine wants to escape, it must hit the gun of the "April" ground!

damn it**

Brothers, it’s the last day, help Shinshuo keep the sixth category. Shinshuo promises to keep the lowest level every day starting from next month~ Chapter, add 1 chapter, and votes for "National Policy"! (To be continued,)

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