Open an aircraft carrier to fight against Japan

Sun Jiang saw the other side's warship firing, but he didn't panic at all. There are more than 40 gun emplacements on the entire fort, and there are fake forts inside, but there is only an empty shell, but there is no artillery inside. They may not be aiming at themselves. , even if they aimed at themselves, they might not be able to hit them, after all, there was a long distance.

Sun Jiang guessed right, the opponent did not aim at him, the shell scraped against his gun emplacement and landed on the artillery emplacement beside him, and the shell hit the wall of the emplacement heavily, Sun Jiang keenly felt the strength of the opponent's artillery. Not very powerful.

Before he could think about it, the two gunners next to him had already moved the handles and raised the ground-sinking gun from the gun pit. The so-called ground-sinking gun is to dig a deep hole behind the parapet, and the artillery is hidden in the pit when it is not in use. Here, when the enemy ship comes, operate the lifting mechanism to raise the artillery from the pit to the position above the parapet, and then attack the enemy ship.

The observers on one side use theodolite to observe the position of the opposing warship. Theodolite is an instrument used to measure angles. There is no laser range finder in this era, so they use triangulation to measure the distance, that is, the positions of two points are known. These two points form a known line, and then make a connection with the unknown point respectively, use the observation instrument to measure the angle between the known line of the two lines, and then use the trigonometric function to calculate the distance from the point where you are to the unknown point .

Everyone knows that trigonometric functions are not integers. To be applied in engineering, a certain approximation is required. When approximating, the position of the decimal point is too much, and the calculation is too complicated. After all, there were no computers in that era; too little is not accurate enough. It is necessary to know that the distance between two known points cannot be made too small, otherwise the deviation of the angle will be large, so the error will be even greater if the distance is multiplied.

The error of the trigonometric function is only one aspect. The error of the observation is even greater. The first is the error of the theodolite itself, and the second is the error of the observer. In this way, it is difficult to measure the distance accurately, and the distance is not accurate. How can it be accurate? ?Coupled with the influence of wind speed, air density, and humidity, no matter in that era, it was not easy for artillery to shoot accurately.

Therefore, the artillery needs to fire a round before focusing the fire, and then the observers will calibrate, adjust the shooting position, and then focus the fire. However, due to the backward command mechanism of the Qing soldiers, each fort is fighting independently. After the first shell was fired, the warship calibrated immediately, and soon, more accurate artillery fire flew over, and the Qing army lost the opportunity invisibly.

"Azimuth [-], altitude [-]", Sun Jiang heard the observer's command, and quickly adjusted the position of the muzzle. This adjustment of the position of the muzzle is also a science. Large-caliber artillery weighing dozens of tons is difficult to rotate, and it is difficult to turn it. It is not an easy task to stop quickly and steadily in the designated direction. Youdao is a trick that is popular all over the world. Sun Jiang is specialized in this. He quickly turned the cannon to the designated position .

Another gunner opened the breech, two people held the shell and stuffed it into the barrel, and another person loaded the propellant charge, then pulled the firing pin, the firing pin hit the igniting powder, the igniting powder burned and then ignited the propellant powder, which exploded The high-temperature and high-pressure gas generated is blocked by the barrel wall and the locking device, and can only rush towards the muzzle direction. In this way, the shell is pushed, and the shell rotates at high speed in the bore, and finally leaves the bore and rushes towards the target.

The huge recoil made the cannon move backwards, and the cannon body also shook. Sun Jiang and several gunners waited until the cannon stopped, and quickly pushed it back to the gun position. Sun Jiang called to the observer: "Did you hit it?"

"Missed!"

Sun Jiang asked again: "How much off?"

"There are too many hits, and it's hard to tell which one was hit by us."

Sun Jiang roared: "Then where should we fight next?"

"Wait for me to do the math."

At this moment, Sun Jiang suddenly discovered that the opponent's warship had retreated.

What they didn't know was that the British fleet had already figured out the location of the real fort of the Qing army during this wave of fire reconnaissance.

Seeing the British warship retreating, Sun Jiang sat down on the ground, as if escaping from death, drew out the bong, took out the scythe and flint, hit it, and sucked it up one mouthful at a time.

Before Sun Jiang recovered his breath, he heard someone shouting: "The British ship is back!"

Sun Jiang looked out from inside the fortress, and saw the British fleet lined up in two columns, heading towards his fort. There was a buzzing in the ears, it turned out that a shell exploded on the edge of the fort.

Sun Jiang couldn't help shouting: "How can this **** foreign devil's cannon be so accurate!"

The person on the side shouted: "It's not that the shot was accurate, it's because there is too much gunpowder in the shell. What kind of cannon is this? It's too powerful."

They didn't know that this was the shell of the 343mm main gun on the Sovereign-class battleship. The power of this kind of artillery is one of the best in the world.

The caliber of Sun Jiang's cannon is only 250 mm, and the range is just a step behind others. At this distance, the fort can only be beaten.

Soon Sun Jiang saw a shell penetrated into the parapet of the nearby fort. It was an armor-piercing shell. The huge kinetic energy tore the parapet, and the gunner inside was smashed into pieces. The huge impact detonated the storage room under the fort. The ammunition in the bomb, the huge explosion engulfed the dust, and the flesh and blood flew into the sky.

Sun Jiang looked at the observer on the high ground who was shocked to the point of bleeding, and fell to the ground with a bang. His widened eyes met the trembling soldier holding his head in the corner, and the soldier was instantly crushed. Calling and running out, Sun Jiang cursed in his heart: "You son of a bitch, you can still survive if you hide inside, but you will die faster outside."

Sun Jiang reached out his hand to grab his clothes and shouted, "Come back to me." But amidst the deafening explosions that filled the sky, who could hear his words?

With a sound of "stab", a large piece of the soldier's clothes was torn off by Sun Jiang, and Sun Jiang was also taken by him and fell to the ground.

Just as Sun Jiang wanted to start cursing, he saw Shangguan kick the soldier to the ground, drew out his steel knife, and said angrily, "If you run away, cut it off!"

His voice was drowned in a loud noise. A high-explosive grenade exploded outside the fortress, and the shrapnel hit the wall. Although it didn't penetrate the wall, the gravel on the wall was shaken down, slashing like a knife. Flying inside the fortress, Shangguan's head was directly smashed into a sieve!

As Shangguan fell to the ground, Sun Jiang couldn't help smelling a stench. The fleeing soldier had already pulled up his pants, and Sun Jiang cursed inwardly: "Why are the damn foreign devils' cannons endless!" He did not know that the firing of the British fleet was carefully planned to ensure that the artillery fires would not be fired at large intervals.

Sun Jiang saw that the British warship had sailed into the range of his cannon, and hurriedly got up. The observer was dead, and the theodolite was broken. Even if it was in good condition, no one would use it except the observer. Come on, get up, is Xu Yang the devil hitting us?"

At this time, a gust of wind hit, the roof of the whole fortress was lifted suddenly, and the sand and earth fell down with a splash, making everyone in the fortress ashamed. Sun Jiang stretched out his arms, raised his fingers, closed and opened his eyes, and wanted to use it. He used the saccade method to measure the distance, but before he could get it right, a wave of air rushed over, and Sun Jiang felt that his eyes went dark, and he didn't know anything.

I don't know how long it took before Sun Jiang opened his eyes. He was surrounded by mutilated limbs, parts of cannons, and wood for building fortresses. He looked around and saw that most of the fake fortresses were intact. He seemed to understand the heroes who had retreated in the first place The purpose of the ship, but he no longer cares about these.

The only thing he cares about is: In this battle, he survived.

Just when he was rejoicing, the British fleet was crossing the Taiwan Strait and heading north. Their real purpose was still unknown.