Li Qinwu got several hundred 240mm shells at the Fengtian Arsenal at that time. Each of these shells weighed 200kg, and the destructive power contained in them was frightening just by looking at the huge shell body.

It's a pity that Li Qinwu didn't find the 240mm gun at that time. He only found a few rough gun barrels. Without firing the cannon, these 240mm shells became useless and could only be used as roadside bombs.

But now with the incredible material of ceramic steel, the two intelligent clones showed great interest in manufacturing 240mm cannons!

They carefully studied the semi-finished 240mm gun barrel, measured the shells, and then based on the previous technology of reverse engineering the 105mm gun, they enlarged the caliber, thickened the gun wall, and lengthened the gun barrel in an attempt to manufacture a 240mm gun.

The original Japanese 240mm gun was a Type 33 howitzer, weighing 11 tons and with a range of about 240 kilometers. Well, for a 4mm gun, this range is really too poor. The reason is that the barrel of this gun is too short, less than meters. For a heavy artillery, such a short barrel can't provide much acceleration.

The Japanese had no choice. The Japanese designed this type of gun to be used as a road gun. A road gun weighs more than 33 tons, which makes it unable to reach most areas. If the barrel needs to be lengthened to extend the range, let alone whether the quality of the steel can keep up, the Japanese army is afraid that they will not be able to transport this gun at all.

Fortunately, the ceramic steel of the Punishment Army is not only lighter than traditional steel, but also stronger, making it a perfect material for making cannons!

The two intelligent clones, Li Zhi and Li Hui, directly stretched the gun barrel to 8 meters, 33 times the diameter, and thickened the barrel so that it could withstand higher chamber pressure, load more propellant bags, and double the range!

After making the mold and firing the gun barrel, Li Zhi and Li Hui used this gun to test fire three rounds at Hutou Mountain. The gun did not explode and its range reached a terrifying 25km!

After this modification, the performance of the artillery has doubled, but the length of the artillery plus the gun mount reaches 15 meters, and the weight is as high as 41 tons. This is a artillery that cannot be transported by land.

Fortunately, Li Qinwu had no plan to use it normally. Artillery of this level was worthy of his special use in opening a portal!

So he ordered Li Zhi and Li Hui to build an automatic turret on the island, which could carry a twin 240mm gun and rotate for aiming and loading!

As we all know, the larger the caliber of the artillery and the heavier the shells, the slower the rate of fire. However, a battleship like the Nagato, with a 410mm main gun, can fire at a rate of two rounds per minute, which is already a very fast speed.

The reason why it can be done so fast is because of the three-story-high mechanical loading system inside the hull of the Nagato.

In order to increase the firing rate of this twin-mounted 240mm gun, Li Qinwu asked Li Zhi and Li Hui to design the loading system.

The two of them designed quickly. Based on the automatic loading system of the Soviet tank turret that Li Qinwu had seen in his previous life, they fumbled and came up with this three-story-high thing in front of them.

This thing has a lot of complex mechanical structures inside. It uses the Leman Rust tank engine as its power source, and cooperates with the mechanical rotary structure cast at the steel plant. The turret can rotate 360 ​​degrees in just two minutes. With the automatic loader, the firing rate can reach three rounds per minute.

But it is obvious that even if the two of them are intelligent clones, they still failed when they tried to build such a complicated structure for the first time.

The two guys were now anxiously tinkering in the turret, hoping to get the electromechanical system they had built back into operation.

At this time, there was continuous artillery fire outside the island space. Although Li Qinwu had sent all the people into the island space, anyone would feel aggrieved to be bombarded like this all the time.

An anxious atmosphere spread. After waiting for more than ten minutes, after a roar of the engine, the Leman Russ tank engine was started, and the huge metal wheel with the long gun barrel began to turn.

The complex automatic loader started to operate, and two 240mm shells were pushed into the two gun barrels respectively. Then four propellant bags were stuffed into each gun chamber. Each propellant bag weighed 4kg, which is 20kg of propellant!

Li Zhi and Li Hui climbed out of the turret and made an OK gesture to Li Qinwu.

Finally, it was debugged. Li Qinwu used an avatar hiding in the machine gun bunker as a teleportation anchor point and opened a portal nearby, which was just big enough for the turret to aim at the sea.

Li Qinwu and his clone who eats melons ran away quickly, retreating to more than a hundred meters away. They were quite unsure about the heavy artillery they were using and were afraid that it would explode.

Li Zhi and Li Hui climbed into the operating room under the turret, which was an explosion-proof cabin dug underground and protected by 1000mm ceramic steel plates.

They used the high-powered telescope in the operating room to lock onto the largest Japanese warship, and after repeated calculations, they obtained its coordinates. They turned the gun wheel according to the coordinates, and under the action of the Leman Russ tank's attack, the small gun wheel drove the elevation engine and the direction engine to adjust the muzzle direction. The two of them operated a super heavy artillery.

At that time they had not yet realized how amazing the highly automated turret they designed was.

After completing the aiming, Li Zhi and Li Hui in the operating room looked at each other, and they pressed the trigger button together.

There was an earth-shaking sound of artillery fire, and two shells weighing 200kg were pushed out of the barrel. The entire ground shook three times because of their departure.

Li Qinwu, who was hiding 100 meters away, felt tinnitus instantly, and it took him a while to recover. He was quite shocked that the power of the cannon when it was fired was so great!

Only then did he remember to check whether the shells hit the Japanese warships. He immediately contacted Li Zhi and Li Hui using mind sharing.

"Did you win? Did you win?"

Li Zhi and Li Hui did not answer. It was obvious that they were also shocked. They were hiding under a heavy artillery. Although they were protected by a layer of ceramic steel, the impact of the cannon still shocked them.

After a while, they remembered to observe the shooting point. They both got together and folded the telescope in the basement, extending the eyepiece. Then Li Qinwu felt that there were two people in his head shouting frantically: "Observed the explosion! Hit! We hit it!!!"

That’s right, the two shells they fired hit the enemy’s flagship, the Izumo!

The Japanese have protected the Izumo very well. Since the war began, it has been active in the sea 12km away from the Wusong Fort. No artillery here can hit it, but it can easily bombard the Wusong Fort with the 150mm artillery on the ship.

Before Li Qinwu opened the portal and prepared for the bombardment, the Izumo was still leisurely attacking with its main and secondary guns. At such a distance, Li Zhi and Li Hui could not see clearly which warship they were attacking, so they chose the one that looked the largest and opened fire.

Who would have thought that the long-barreled 240mm cannon they designed had such a straight trajectory and could hit the target on the first launch!

Two 240mm shells were accelerated to Mach 80, 1800 meters per second, by 10kg of propellant. After flying in the air for more than seconds, they successfully reached the position of the Izumo.

One shell grazed the Izumo's hull and fell into the sea, creating a water column 30 meters high. Another shell directly hit the Izumo's island.

The 200kg projectile smashed into the island and exploded, destroying a 1mm secondary gun, three cabins, and chewing a hole with a diameter of 127 meters on the island, killing and injuring dozens of Japanese soldiers.

The hull of the Izumo shook violently, and the Cambridge officers were almost scared to death. If their flagship sank here, they would commit seppuku to apologize in a minute, so they ignored everything and went at full speed to smash Luda directly.

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