However, for Qin Hui and the Hell-class submarines, they didn't know that the British Navy in Myanmar had dispatched escort destroyers, so they were also defenseless, and the Hell-class submarines seemed to be facing a fiasco.

Although the escort destroyer does not have sonar for detecting Hell-class submarines, the Hell-class submarines must float to the periscope level before launching an attack, raise the periscope, observe the target, and expose the periscope to the surface, which may be discovered.

There are also torpedoes in the water, although the tiger shark torpedo uses a motor, and the torpedo will not emit exhaust gases to form bubbles when sailing, but the tiger shark torpedo will still leave traces in the water when sailing, after all, the tiger shark torpedo is a big guy weighing up to 600 kilograms, and it is impossible not to leave bubbles, water marks and other traces when sailing in the water.

The launch of the tiger shark torpedo relies on high-pressure air, and a large amount of high-pressure air pushes the tiger shark torpedo out of the hull, and at the moment when the tiger shark torpedo is launched, these high-pressure air pours into the seawater, forming a large number of bubbles, and the bubbles surface and forming a large bubble area on the water surface, which is also the easiest thing to expose the position of the submarine.

When the enemy is defenseless against the Hell-class submarine, these things will not be noticed by the enemy, but when the enemy is carefully guarding against the Hell-class submarine, these traces can be easily observed.

These traces can be found by escort destroyers, and then lock the location of the Hell-class submarine, the speed of the escort destroyer is generally more than twenty-five knots, this speed is far more than the Hell-class submarine, once the escort destroyer locks the approximate location of the Hell-class submarine, the escort destroyer will rush to the vicinity of the Hell-class submarine and drop depth charges in the water.

On November 20, the first encounter between the Hell-class submarine and the escort destroyer took place.

The protagonist of this encounter is not Qin Hui's Qin Guangwang boat, but the Hell-class submarine's Wuguan Wang boat, which had previously sunk a ship carrying ore, causing serious losses to the enemy.

At 10 o'clock in the morning, the king boat was still cruising on the departure route of Yangon Port, and soon the sonar chief found a large number of sound signals, and after careful identification, it was found that there were at least six ships that emitted these sounds.

Nan Zhengxiong, the captain of the Wuguan Wang boat, is very strange, because according to the convention, when the British merchant ships have never formed a fleet, they all travel alone, because the types of merchant ships are relatively different, and the economic speed is not the same, if you want to form a fleet, you must accommodate other people's ships, which will bring unnecessary costs, so under the condition that there is no threat (pirates, enemy ships, submarines, etc.), it will not form a fleet.

Although Nan Zhengxiong, the captain of the Wuguan King Boat, thought of this, he did not think about the escort destroyer, he believed that the formation of the enemy's merchant ships into a fleet was a strategy of "sacrificing the part to protect the whole", that is, if the merchant ships were targeted by the Hell class submarines, then only a few merchant ships could be sunk by the Hell class submarines, and the other merchant ships could escape when the Hell class submarines attacked one of them.

Nan Zhengxiong ordered the Wuguan Wang boat to float to periscope depth, and then raised the periscope to observe the target, and found eight merchant ships and one warship.

Nan Zhengxiong did not take the warship seriously, and ordered the Wuguan Wang Boat to launch an attack on the British merchant ship according to the original fighting method, and a tiger shark torpedo was immediately fired, sinking a British merchant ship with a displacement of 5,000 tons.

When the Tiger Shark torpedo was launched on the King of Five Senses boat, the escort destroyers did not see it, because the periscope was too small after all, inconspicuous in the sea, and it was difficult to find it, but after the torpedo was launched, some sailors of the merchant ship discovered it.

Merchant ships were also afraid of hell-class submarines and torpedoes, so observers were arranged on board to keep an eye on the surface of the sea at all times, looking for traces of torpedoes.

The merchant ship found the torpedo, and it was impossible to escape if it wanted to, because the speed of the tiger shark torpedo reached fifteen knots, far exceeding the speed of the merchant ship.

However, the merchant ship informed the escort destroyers of the location of the torpedo, and the escort destroyers immediately headed towards the location where the torpedo was fired, firing depth charges every 300 meters as they went.

The depth charges of the depth charges equipped on the escort destroyers are 100 kilograms, and the mass of the entire depth charge is more than 150 kilograms.

The depth of the explosion of the depth charge is 50 meters, and it takes about 10 seconds from the time it enters the water to the time it explodes, and during this time, the escort destroyer can travel more than 100 meters at a speed of about 20 knots, so the explosion of the depth charge will not accidentally damage the escort destroyer.

One after another, the depth charges sank into the water, exploded suddenly, and the shock wave quickly affected the Wuguan Wang boat, in order to allow the Wuguan Wang Boat to sink more British merchant ships, Nan Zhengxiong did not order the Wuguan Wang Boat to retreat immediately, but ordered the Wuguan Wang Boat to maintain its original speed and course, and continued to fire torpedoes, but was hit by the shock wave.

Nan Zhengxiong realized that the enemy had used depth charges, and hurriedly ordered the Wuguan King Boat to dive at full speed and leave the attack area at full speed.

The escort destroyers actually didn't know the specific location of the King of Facial Features, they used depth charges, purely to blow up indiscriminately, and it was best to blow up naturally, and it didn't matter if they couldn't, so when the King Boat withdrew from the combat area, the escort destroyers did not chase after them.

Although the escort destroyer did not sink the Wuguan kingship, the escort destroyer saw that after a merchant ship sank, no merchant ships were attacked again, and decided that the attacking submarine was damaged and fled, so it declared that the escort was successful.

As for the king of facial features, after driving to a safe area, it was found that the hull was damaged in many places, the engine power was sharply reduced to 40% of the available power, the right hull rudder failed, the main ballast water tank was damaged, and the displacement of the hell-class submarine was not large, so the anti-sinking performance was not good, and after such damage, it could only float on the surface of the water and wait for rescue.

For a submarine, it is dangerous to float on the surface of the water and wait for rescue, because it can be discovered by enemy ships at any time, fortunately, until a Leopard-class high-speed transport ship arrives to rescue the king boat, the king boat is not detected by the enemy.

The Leopard-class high-speed transport ship towed the King of Facial Functions back to Andaman Island, but there was no maintenance equipment for the Hell-class submarine on the island, so the King of Facial Functions could only be towed by the Leopard-class high-speed transport ship and returned to the base in Aceh for maintenance.

A hell-class submarine withdrew from the battle in this way, and this was also the second submarine lost by the submarine force of the Chinese Navy, the first being the monster-class submarine Ghost Shark, which was sunk by British mines.

For the hell-class submarine, the injury of the Wuguan King Boat and the withdrawal from the battle was just the beginning, in the next battle, because of the participation of the escort destroyer, the Chujiang King Boat and the Song Emperor Boat were damaged one after another, but the damage was not large, and the battle could be continued, but the combat effectiveness was weakened to a certain extent.

At the same time as the combat effectiveness of the hell-class submarines weakened, the British merchant ships began to re-move, and the port of Yangon, which had been sealed, became active again, and the number of sunken British merchant ships gradually decreased, from three per day at the peak to one every three days.

The Hell-class submarine finally exposed a series of shortcomings, such as the lack of sinking resistance, the lack of concealment in torpedo launches, etc., but the Hell-class submarine is already the most powerful submarine that Lin Fei can come up with, and it is unrealistic to redevelop a more advanced submarine now.

In fact, throughout the history of the development of weapons and equipment in the world, there is no weapon that is completely devoid of shortcomings, and in this case, only the wisdom of the commander can be used to make up for the lack of weapons.

Qin Hui then ordered all the hell-class submarines to launch only one attack, and immediately after the attack, they dived and withdrew from the battle, and later Qin Hui was worried that the hell-class submarine would be discovered by the enemy when the periscope was raised to observe, so he ordered that he try not to use the periscope to observe the target, but to give full play to the advantages of the hell-class submarine equipped with sonar, and use the sonar to attack the enemy's merchant ships throughout the process.

Qin Hui saw that both the King Boat of Chu Jiang and the King Boat of the Song Dynasty were damaged, so he ordered the two Hell-class submarines to return to the Aceh base to repair them, and transferred four Hell-class submarines from the Aceh base again to continue to attack the British merchant ships.

As a result, the number of British merchant ships sunk began to increase again, but the British merchant ships formed a fleet, and there were escort destroyers to protect them, and the hell-class submarines could not completely blockade Burma as Lin Fei originally envisioned.

The battle of the hell-class submarine in the vicinity of Burma is known as the "Battle of the Burma Sea" by war historians, and this battle is the first time in human history that a submarine is used for a harbor blockade operation, so it has been studied by many weapons experts.

On November 20, the Japanese army suddenly launched an attack on Shanhaiguan, and the Japanese attack was very vicious, and they actually captured a large number of Qing people and put them in front as meat shields.

Japan dared to use the Qing people as a meat shield, this is simply ...... It's like looking for death, because Lin Fei's helium is almost ready.

In June, Huaxia's helium has been prepared 2,000 cubic meters, at that time, it was said that in another two months, that is, in August, the helium produced will be enough to refit all eight Monkey King airships, and it is already November at this time, not only the original airships can be reequipped, but even the latest eight airships can also be reequipped. (Welcome to join the Canghai Readership Group - 423214695)