Heihachiro Togo asked, "Teacher, the students would like to hear about it." ”

The old man said: "Look at its turning diameter, it only took a thousand meters to turn one hundred and eighty degrees, what kind of rudder does such a large ship need to provide such a large thrust!" And its acceleration, ten minutes, the speed has increased by more than ten knots! ”

Heihachiro Togo said: "Teacher, the student also found some suspicious points, there seems to be no cannon on it, and there are a lot of curved covers on its bridge...... "The curved cover is the radome outside the Beijing ship, of course he didn't see much."

But the old man interrupted him, and said excitedly, "Haven't you found the most terrible part of it?" ”

Heihachiro Togo hurriedly asked, "What is the most terrifying place?" ”

The old man said, "Don't you see the ship, and its roll is very small?" ”

Heihachiro Togo suddenly realized and said, "In this way, the rate of fire of the artillery can be faster!" ”

The so-called rolling, that is, the ship is driven by the sea, the hull of the ship is shaken on the axis of the bow and tail line, so that the shooting of the ship's guns has brought great difficulties, because when the gun is shaking, the position of the gun is changed, if the distance is very close, there is no problem, once the distance is opened, the landing point of the shell will be 108,000 miles.

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

That old man is the originator of Japanese ship design, named Rikuyama Shinyuki, who studied mathematics in the early years, and later specialized in fluid mechanics in order to design warships, and his solid mathematical foundation and ability to build mathematical models for practical problems made him famous in the field of ship design.

The layman looks at the excitement, the insider looks at the doorway, Lu Shan Zhenzhi immediately saw that the Beijing ship has excellent shaking, but he can't see how the Beijing ship does it, because the Beijing ship uses two tricks, one is the retractable stabilizer fin, this device can reduce the shaking 90%, but the stabilizer fin is not anti-shake at low speed, so another trick was taken, actively control the anti-shake water tank, when the ship is shaking, the water can be hit from one side to the other in a short period of time, which is equivalent to the water to press down the shaking side, The shaking amplitude is reduced. These two devices, one is underwater and the other is inside the ship, so Lu Shan Zhenzhi can't see it at all.

Lu Shan Zhenzhi hides the more terrible thing about the Beijing ship deep in his heart, that is: if you want to design such an excellent rudder, anti-roll device, and acceleration device, you must have extremely deep experience accumulation, and in the process of ship design, the selection of many parameters is based on empirical formulas, and there is no complete theory; Some don't even have formulas, and the only way is to make them and test them, and then change them if they don't work.

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

At this moment, Heihachiro Togo asked, "It's accelerating, can we still catch up?" Lu Shan Zhenzhi didn't think about it, and said: "Catch up, you have to get this ship no matter what!" ”

At this time, Han Mingguang, looking at the flickering radar screen, gave an order to slow down, this is for the Japanese warships to see, the purpose is to give them the confidence to chase down!

The Japanese warships slowly caught up, and the Beijing ships adjusted their course and speed, always out of the range of the opponent's artillery fire, and on the Fuji ship, the chief of staff of the Navy, Jiaodao Shingui, said: "General Togo, we have left Port Arthur, will they take the opportunity to land?" ”

Togo Heihachiro said with a smile: "There are batteries in Port Arthur, they have no return, and in other places suitable for landing, we have laid mines, and if they dare to come, they will blow them up to the bottom of the sea!" ”

The Beijing ships originally planned to let the 1st Ryukyu Division land in Jinzhou Bay, and after landing, they would take Dalian first and then Lushun, but they did not take immediate action because they were worried that the waters of Jinzhou Bay had been mined by the Japanese army.

The Beijing warship then decided to take advantage of the opportunity to lure the Japanese warship out of Lushun and send anti-submarine planes to carry out a mine-sweeping operation in Jinzhou Bay.

An anti-submarine plane and two helicopters left the Beijing ship and headed for the waters of Jinzhou Bay, their goal was to reconnoiter and destroy mines in the waters near Jinzhou Bay.

The helicopter and the anti-submarine mechanism have become a sea minesweeping group, and the anti-submarine aircraft is a small passenger aircraft modified with a carrying capacity of about 15 tons, so it can carry high-power underwater acoustic detection equipment and magnetic detection equipment on the fuselage, as well as large data processing equipment.

When the anti-submarine aircraft discovers a mine, it transmits the location information to the helicopter, which flies over to locate it more accurately and destroys the mine with a deep-water rocket. The anti-submarine aircraft soon discovered the traces of mines, the mines laid by the Japanese army are anchor mines, this kind of mines come with floating gear, fixed at a certain depth position with anchors, the mines of this era have not been processed by degaussing technology, so their own magnetic signals are relatively large, and they cannot be hidden under the electromagnetic detector of the anti-submarine aircraft.

The helicopter flew to the sea surface, threw a sonar buoy, the sound wave can travel long distance in the water, and the energy of the electromagnetic wave is quickly dissipated after entering the water, so the underwater detection equipment is to detect with sound waves, its main body is composed of a series of microphones, the microphone can convert the underwater acoustic signal into an electrical signal, and people judge the underwater situation according to the electrical signal. A sonar buoy is an active underwater acoustic detection device, which is able to emit sound waves and then receive echoes with the power of internal batteries, so as to judge the underwater situation.

The latest type of sonar buoy produced in China uses an electret condenser microphone, which does not need a voltage of up to 200 volts, so the sonar buoy can work for a longer time.

The signal received by the microphone is chaotic, the sound of the wind pushing the sea, the sound of the fish swimming, after a series of calculations and screening, finally locked the direction of the first mine, the helicopter flew towards the position of the mine, the helicopter launched a deep-water rocket towards the position of the mine, because the depth of the detected mine is eight meters, so after the rocket entered the water, it exploded at a depth of eight meters, and the explosion pushed the water flow, and the huge water pressure formed tore the shell of the mine in an instant.

Most of the mines of this era used trigger fuses, so they were not detonated, but were scattered, the pontoons entered the water, the anchor chain was blown off, and they sank deep to the bottom of the sea.

Subsequently, the helicopter did the same, and soon cleared 30 mines in the landing waters, which the Japanese fleet lured away from Lushun by the Beijing ship did not know anything.

The Beijing ship accelerated for a while, slowed down for a while, and was always out of the range of the Japanese warships, and whenever Heihachiro Togo made up his mind not to chase anymore, the Beijing ship would slow down, making him think that the mysterious ship was no longer working, and the acceleration just now was just a return to the light, and in this way, the Japanese warship was lured away from Port Arthur for more than 100 nautical miles.

Taking advantage of this time, Deng Shichang led the First Fleet of the Ryukyus to enter the shore from the waterway of Jinzhou Bay, and ten transport ships converted from freighters landed on the coast at high tide and went straight to Dalian.

In the landing operations throughout the ages, there was no landing party that did not control the sea, so the Japanese army did not expect the Qing army to really dare to land, and the Dalian defenders thought it was their own troops when they saw the Qing army!

After the 1st Ryukyu Division took Dalian, it took Jinzhou again, and the troops were divided into two routes and rushed towards Lushun.

And the Japanese army in Lushun was still at a loss.