Open an aircraft carrier to fight against Japan

Dongxiang Heihachiro asked: "Teacher, the students would like to hear more about it."

The old man said: "Look at its turning diameter. It only takes 1000 meters to turn 180 degrees. What kind of rudder is needed to provide such a large thrust for such a large ship! And its acceleration, 10 minutes, the speed increases. More than ten festivals!"

Dongxiang Heihachiro said: "Teacher, the students also found some doubts. It seems that there is no cannon on it. Also, there are many arc-shaped covers on its bridge..." The arc-shaped covers are the radar covers on the outside of the Beijing ship. Of course I haven't seen much.

But the old man interrupted him and said excitedly: "Didn't you discover the scariest thing about it?"

Dongxiang Heihachiro quickly asked: "Which place is the scariest?"

The old man said, "Didn't you see that ship, did it roll very little?"

Dongxiang Heihachiro suddenly realized, and said: "The rate of fire of the artillery can be faster in this way!"

The so-called rolling means that under the push of the waves, the ship will shake around the axis connecting the bow and the stern. In this way, it will bring great difficulties to the firing of the naval guns, because the cannons will also follow when shaking. Shaking, the position of the muzzle will change. If the distance is very close, there is no problem, but once the distance is widened, the impact point of the shell will be far away by a thousand miles.

The shape of the wave is like a sinusoidal curve, with a crest and a wave bottom. In order to ensure accuracy, many warships will fire when they are at the bottom of the wave, because the warship is the most stable at this time, which brings a problem of slowing down the rate of fire. , the warship had to accommodate the waves.

The old man is the originator of Japanese ship design. His name is Lu Shan Shinyuki. He studied mathematics abroad in his early years. Later, he specialized in fluid mechanics in order to design warships. His solid mathematical foundation and ability to build mathematical models for practical problems made him famous in the field of ship design. big build.

A layman watching the fun, an insider looking at the doorway, Lu Shanzheng immediately saw that the Beijing ship's anti-rolling performance is excellent, but he couldn't see how the Beijing ship did it, because the Beijing ship used two unique tricks, one is to close Extended fin stabilizer, this device can stabilize the roll by 90.00%, but the fin stabilizer has no stabilizer at low speed, so another trick is adopted, actively control the stabilized water tank, when the ship shakes , the water can be pushed from one side to the other in a short period of time, which is equivalent to the water pressing down the shaking side, thus reducing the shaking range.Of these two devices, one is underwater and the other is inside the boat, so Lu Shanzhen can't see it at all.

Lu Shan really hid the scariest part of the Beijing ship deep in his heart, that is: to design such an excellent rudder, anti-rolling device, and acceleration device, you must have extremely deep experience accumulation. In the process of ship design, many The selection of parameters is based on empirical formulas, and there is no complete theory; some even don’t even have formulas. The only way is: make it out and try it out, and then change it if it doesn’t work.

"What kind of country can build such a ship?" Lu Shan Zhenzhi kept asking himself in his heart!

At this moment, Dongxiang Heihachiro asked: "It speeds up, should we chase it?" Lu Shanzhen didn't even think about it, and said: "Catch up, and we must get this ship no matter what!"

At this time, Han Mingguang looked at the flickering radar screen and gave an order to slow down. This was for the Japanese warships, and the purpose was to give them the confidence to chase down!

The Japanese warships slowly caught up. The Beijing ship adjusted its course and speed, and was always out of the range of the opponent's artillery fire. Will they take the opportunity to land?"

Dongxiang Heihachiro said with a smile: "There is a fort in Lushun Port, and they never come back. We have laid mines in other places suitable for landing. If they dare to come, we will blow them into the bottom of the sea!"

The Beijing ship originally planned to let the Ryukyu First Division land in Jinzhou Bay. After landing, they would first take Dalian and then Lushun, but they did not take immediate action because they were worried that the waters of Jinzhou Bay had been laid by the Japanese army.

Therefore, the Beijing ship decided to take advantage of the opportunity to lure the Japanese warship out of Lushun, and dispatched anti-submarine aircraft to launch a mine-sweeping operation in Jinzhou Bay.

An anti-submarine aircraft and two helicopters left the Beijing ship and headed towards the waters of Jinzhou Bay. Their goal was to detect and destroy the mines in the waters near Jinzhou Bay.

The helicopter and the anti-submarine aircraft form a sea minesweeping team. The anti-submarine aircraft is refitted from a small airliner with a load capacity of about [-] tons, so it can carry high-power underwater acoustic detection equipment and magnetic detection equipment on the fuselage, as well as large data Handle equipment.

When the anti-submarine aircraft discovers the mine, it transmits the location information to the helicopter, and the helicopter flies over to perform more accurate positioning and destroy the mine with deep-water rockets.The anti-submarine aircraft soon discovered the traces of the mines. The mines laid by the Japanese army were all anchor mines. This mine had its own buoyancy device and was fixed at a certain water depth with an anchor. The mines of this era have not been processed by degaussing technology, so they themselves The magnetic signal of the anti-submarine aircraft is relatively large, and it cannot be hidden under the electromagnetic detector of the anti-submarine aircraft.

Helicopters fly to the sea and drop sonar buoys. Sound waves can travel long distances in water, but the energy of electromagnetic waves dissipates quickly after entering the water. Therefore, underwater detection equipment uses sound waves for detection. Its main body Composed of a series of microphones, the microphone can convert the underwater sound signal into an electrical signal, and people can judge the underwater situation based on the electrical signal.The sonar buoy is an active underwater acoustic detection device. Under the power supply of the internal battery, it can emit sound waves and then receive echoes to judge the underwater situation.

This latest type of sonar buoy produced in my country uses an electret condenser microphone. This microphone does not require a voltage of up to [-] volts, so the sonar buoy can work for a longer period of time.

The signals received by the microphone were chaotic, the sound of the wind pushing the waves, and the sound of fish swimming. After a series of calculations and screening, the position of the first mine was finally locked. The helicopter flew towards the position of the mine, and the helicopter flew towards it. A deep-water rocket was launched at the position of the mine. Since the depth of the mine was detected to be eight meters, the rocket exploded at a depth of eight meters after entering the water. The explosion pushed the water, and the huge water pressure formed instantly tore The shell of the mine.

Most of the mines in this era used trigger fuzes, so they were not detonated, but were broken up, the buoys entered the water, the anchor chain was blown off, and they sank deeply into the seabed.

Then the helicopter did the same thing, and quickly cleared [-] mines in the landing waters, and the Japanese fleet that was lured away from Lushun by the Beijing ship still knew nothing about them.

The Beijing ship accelerated for a while, and then slowed down. It was always out of the range of the Japanese warship. Whenever Togo Heihachiro made up his mind not to chase, the Beijing ship would slow down, making him think that the mysterious ship was dead, and the acceleration just now was just In this way, the Japanese warship was lured more than 100 nautical miles away from Lushun Port.

Taking advantage of this time, Deng Shichang led the First Ryukyu Fleet to reach the shore from the waterway from Jinzhou Bay. Ten transport ships converted from freighters landed on the coast by the high tide and headed straight for Dalian.

In the landing operations throughout the ages, the landing party has always controlled the sea, so the Japanese army never thought that the Qing army would really dare to land. When the Dalian defenders saw the Qing army, they thought it was their own troops!

After the First Ryukyu Division captured Dalian, it took advantage of the trend to capture Jinzhou. The troops were divided into two groups and rushed towards Lushun.

The Japanese army in Lushun was still at a loss.