In order to make the cross stronger, the soldiers added an I-beam to the back of the cross as a support, so that the cross would not be broken after two shots.

A fighter accidentally found the tungsten steel warhead that hit the captive...... Several of the warriors immediately began to search for other parts, but only found only a small part, and finally found the tip of the broken bullet on the front of the prisoner's armor.

The warrior wanted to cut off the broken tip, but the tip embedded in the armor was very strong, and it took a lot of effort to get it out, so he had no choice but to give up and hand the broken tungsten steel warhead into the hands of the black bear.

The black bear twisted the waste warhead and sighed: "Boss, tungsten steel armor-piercing shells are useless, why don't you try depleted uranium shells?" ”

The main component of depleted uranium ammunition is uranium-238, a metal with high density, high strength, and high toughness.

In addition to the advantages of mass and density, warheads made of depleted uranium also have self-sharpening and can continue to sharpen themselves in the process of armor piercing, in other words, when depleted uranium warheads are fragmented due to impact, the stubble is still sharp, while tungsten alloy armor-piercing projectiles do not have this characteristic when they are shattered.

In addition, uranium is particularly susceptible to oxidation, and the high temperature generated when the warhead hits the target can trigger uranium burning, which in turn produces a higher temperature, reduces the strength of the armor, and allows the armor-piercing projectile to penetrate the armor.

The armor-piercing ability of depleted uranium bullets is much stronger than that of tungsten alloy bullets, and after the failure of tungsten warheads, black bears suddenly thought of depleted uranium shells.

"Depleted uranium shells? This is a big project, you don't have to worry about Duan Ping's trouble. I have no objection. Ye Fei said indifferently.

The reason why Ye Fei said this is because uranium refining is not a small problem that can be solved by building a smelter, but a huge project that costs a huge amount of money!

In addition to the outstanding armor-piercing ability of depleted uranium, the large application of fission nuclear weapons and the production of a large amount of depleted uranium waste after refining fissile elements are also extremely important factors.

There are very few uranium mines in nature, and most of them are relatively scattered, and there are few concentrated mining areas.

The uranium content in uranium ore is also very low, with uranium ore ranging from 0.05% to 0.2% being the main raw material for industrial uranium extraction, with the highest grade Australian uranium ore in history. The uranium content is only 15 percent.

Natural uranium is composed of three radioactive isotopes: uranium-234, uranium-235 and uranium-238, of which only uranium-235 is a fissile element, and most of the natural uranium is uranium-238, and the content of uranium-235 is less than one percent.

So after refining uranium metal. It must be processed into enriched uranium with a higher uranium content of uranium-235. After the enriched uranium is extracted, what remains is nuclear waste, mainly uranium-238.

Several major nuclear states at that time. Both have accumulated a large amount of uranium waste, especially the United States and Russia, which have a large number of nuclear warheads.

After entering the cosmic age, with the gradual maturity of laser fuzes. Fusion weapons, which are powerful, free of radioactive contamination and easier to obtain raw materials, have gradually become the darlings of the military, while fission weapons have become a thing of the past that no one cares about, and they will never be as glorious as they once were. The once-prosperous uranium industry has slowly withdrawn from the stage of history, and depleted uranium, a by-product from the uranium industry, has disappeared into the long river of history.

If Ye Fei decides to use depleted uranium shells, he will have to send a large number of personnel, spend astronomical manpower and material resources to find uranium ore, and then set up a refinery to painstakingly extract uranium metal from the outrageously low content of ore.

Although Ye Fei did not have the idea of making fission bombs, he did not need to extract enriched uranium, and could directly make uranium metal into warheads, but from the perspective of cost, the gains outweighed the losses.

At present, the construction of the blue star is changing with each passing day, and Duan Ping is like a stingy landlord who watches every resource that can be used, and suddenly a large number of resources are transferred for uranium exploration...... Ye Fei believed that he dared to give such a loser's order, and Duan Ping dared to fight with him!

The dazed black bear didn't know what kind of idea he had come up with, and after Ye Fei explained, he realized that he was taking it for granted.

The depleted uranium bullet was out of play, so he could only retract his gaze, and the black bear put the electromagnetic sniper rifle back in the box and said, "According to me, you don't need to try other ammunition, just go directly to the large-caliber one." ”

"Okay, get on the rocket launchers first." Ye Fei said.

"Where's the rocket artillery?" The black bear roared on the public channel.

One of the fighters immediately flew near the black bear and landed: "Report, bear head, the rocket artillery is here with me." The grinning Wu Shengnan patted the external weapon box on his shoulder and said.

"Let's get started!" The black bear said, pointing to the cross in the distance.

"Yes!" Wu Shengnan activated the weapon box on his left shoulder, revealing four rows of twenty-two rockets, and after aiming at the target, the rockets flew towards the target one after another.

For each rocket fired, Wu Shengnan had to loudly report the type of bullet fired, including two high-explosive shells, armor-piercing shells, armor-shattering shells, armor-piercing shells, and even flares. Every time he hit a captive, Ye Fei would ask Cheng Hong about the situation of the captive, but the answer he got was always so disappointing.

After many times, Ye Fei felt annoyed by himself, so he simply shut up and didn't ask.

The ground around the captives was littered with craters and shrapnel left behind by explosions.

Wu Shengnan had already emptied the twenty-two rockets on his left shoulder, and began to fire the rockets on his right shoulder, and no one took it seriously when the rockets hit the prisoner, but Cheng Hong suddenly found that several curves representing the physiological state of the prisoner suddenly fluctuated violently, and in just an instant, all the curves became flat and straight.

"Stop!" Cheng Hong jumped up Teng, with too much force and armor assistance, he flew at least seven meters high in this jump.

Everyone was stunned by his shout, Ye Fei suddenly realized the reason why Cheng Hong did this, and jumped up suddenly: "Old Cheng, what did it do?" ”

"yes, it worked!" Cheng Hong nodded hurriedly.

"Wu Shengnan—what kind of warhead was that just now?" Ye Fei shouted impatiently like the groom of the cave house.

Wu Shengnan hurriedly replied: "It's an armor-piercing projectile with a tandem warhead...... The kind with an incendiary agent. ”

"Follow me!" Ye Fei flew towards the captive first, and landed two meters high suspended in front of the cross, facing the blackened hole in the armor.

"Did it really work?" Ye Fei couldn't believe his eyes.

Although he proposed to test all known weapons, he did not expect a miracle, but only a dead horse was a live horse doctor, but he did not expect that a miracle actually appeared. (To be continued......)

PS: Why are these last chapters so well reviewed?

Sweat!