In terms of numbering, the 3VBM13 is smaller, indicating that it was born earlier, so the actual performance of this armor-piercing projectile should be worse.

"I think, there's no need to test it, Lao Maozi's tank gun strength is like this."

"That's not good, you still have to try it, and see how bad the old Maozi's armor-piercing bullets are."

Listening to the gossip of everyone around him, Qin Feng couldn't help but speak: "Everyone, this armor-piercing bullet should be more powerful than the one just now." ”

"How is that possible?" Feng Jinxi was a little unconcerned: "Mr. Qin, this model is obviously lower." ”

"Because this is a depleted uranium bomb, it pierces the rod in one piece." Qin Feng said.

"Awards? Rated as the best shell? It seems that there is some doorway. Feng Jinxi nodded: "Okay, then let's see what evil there is in this cannonball." ”

Alas, it's terrible to be uneducated, but it's true that no one knows about depleted uranium shells now.

Zhu Lao's face was very solemn, that's right, Mr. Qin was right, the piercing rod of this armor-piercing bullet was depleted uranium, and when they disassembled and researched, they thought that this shell might be stronger, but they still had to try it to know.

Depleted uranium can be used as armor, and depleted uranium can also be used as a piercing rod for armor-piercing bullets, a by-product of the nuclear industry, which seems to be really useful.

At this time, Qin Feng had already grabbed a handful of soil casually, slowly put it down, looked at the direction in which the soil was blown away by the wind, and was a little relieved, now this wind direction should not blow some dust generated during the target shooting process, although it is only one, you have to guard against it.

"Mr. Qin, are you measuring the direction of the wind?" Li Runzhu asked.

"Hmm."

"Then you're not very good at it."

"How's that?"

"You should throw a brick into the sky and see where it lands."

"Well, that's the wind blowing every day."

There was laughter at the scene, and the report of the tank was heard.

"Ready, please fire!"

Fire!

With the order issued, a ball of flame came out of the muzzle of the T-80 again, and the slender piercing rod threw off the butt and flew forward, the length of the piercing rod codenamed BM32 was only 380 mm, plus the hood, damping block, tail and other components, the overall length was only 480 mm, and compared with the 574 mm BM42 piercing rod, it seemed to be a lot weaker, and the length-to-diameter ratio was only 13, but it was the strongest armor-piercing bullet that Lao Maozi had at hand!

It was fast, and it flew over with a whoosh, smashing into the target.

The flame burned again, one, two, three...... The crowd's eyes widened as they watched the fifth fireball rise, their faces full of surprise.

Sure enough, this armor-piercing projectile is even more powerful!

"Evaluating the best bullets, sure enough, being rated as the best armor-piercing bullets, not blowing." Feng Jin muttered happily.

"It's a depleted uranium bomb, not an evaluation bomb, and the rod of this bullet uses a material called depleted uranium." Qin Feng couldn't help it, and decided to explain a few words: "The biggest feature of this material is self-sharpening and combustion, you saw it just now, is the flame stronger than last time?" ”

The intuitive feeling is unreliable, but the fact that the fireball is significantly larger is also telling!

Tungsten bullet smashed into the armor, relying on the huge kinetic energy, the high temperature brought by friction, the armor was melted, tungsten is a material with a high melting point, will not participate in combustion, and depleted uranium is different, in the process of armor piercing, friction produces a large number of depleted uranium particles, these particles will burn quickly, help melt the armor, increase the depth of penetration, this is an additional effect.

Of course, combustion produces a large amount of dust, which is radioactive and can cause various diseases when sucked into the respiratory tract.

There are strict regulations on the use of depleted uranium ammunition, although the radiation of this thing has always existed, but in fact, before use, it does not pose much threat to the user, but the radioactive dust produced during the use of the body, the harm to the body is obvious to all. Dust collects and enters groundwater, which can cause further pollution.

So, the Yankees can use it boldly with confidence, because they will go away after using it, and they don't care what the local is. Fighting a war is to kill people, just win it, what environmental protection do you consider? It's as ridiculous as smoking is bad for your health, so it's ridiculous not to let a soldier who will die on the battlefield smoke at any time.

"Mr. Qin, what is Zirui?" Feng Jinxi is humble and studious.

Burning they know, the flame is indeed big, but what is self-sharp?

"Self-sharpening is like sharpening a knife." Qin Feng introduced: "In the process of armor piercing, the tip part of the depleted uranium bullet will peel off layer by layer, and each layer will be peeled off, a new tip will be exposed. ”

It's like a utility knife, if you use it to smash a piece down, the one in the back remains sharp. The ordinary tungsten alloy armor-piercing projectile, after smashing into the armor, belongs to hitting the wall, and the more it hits, the more blunt it becomes, which leads to the difference in armor-piercing ability.

"Report, the second shot, armor-piercing capacity of five hundred millimeters! The rod is tied to the fifth target! ”

Armor-piercing ability is measured by different standards, and if the piercing rod is pierced on it, is it considered penetrating, or is it not penetrating? The West is calculated according to penetration, and the East is calculated according to no penetration, after all, there is such a thing as armor-piercing shells, which have to pass through the armor, enter the turret, and turn the interior upside down to complete the task.

But now, the targets are lined up in turn, with air intervals in the middle, which can be regarded as air gap armor, and if these armor plates are directly stacked together, they can definitely penetrate and fly out, so the penetration depth of this 3VBM13 armor-piercing projectile has reached 500 mm!

Everyone's hearts were shaken.

Five hundred millimeters, the penetration depth of Lao Maozi's armor-piercing bullet can already reach five hundred millimeters! This also means that our third-generation tanks must have armor protection of at least 600 mm, which is considered insurance.

Six hundred millimeters! It's too hard, isn't it? You know, even now, the East still uses the 59 tank as the main force, this tank is made of steel, and the thickest turret part is just over 200 millimeters, and it is still cast, which is not the same as forged.

If Lao Maozi's armor-piercing shells come with one shot, they can penetrate two 59s!

Thinking of this layer, everyone's faces are ugly.

"Before the third generation of tanks were put into service, we were under a lot of pressure." Li Runzhu sighed with emotion: "If there is no tank, we don't know that Lao Maozi's own model will be so strong, fortunately, whether it is T-64 or T-80, Lao Maozi is not arranged in the east." ”

Even if even the T-72 is not deployed in the east, Lao Maozi believes that relying on those T-55 and T-62 will be enough to deal with the threat from the east, and the sophisticated equipment will first supply the army on the Western Front.

"You don't have to worry too much, although this kind of armor-piercing bullet has strong performance, it is not equipped in a large number of Lao Maozi's army." Qin Feng looked at the big guy with a worried look on his face, and opened his mouth to comfort.

"With such a powerful armor-piercing projectile, not a lot of equipment?" Li Yunzhu's eyes widened.

"This model is even more forward, since Lao Maozi already has this kind of bullet, why do you want to develop a new type of bullet with a model that is backward and has insufficient penetration?"

Hearing this question, the big guy pondered, yes, why?

"Zhu Lao, you can tell everyone, I won't show off." Qin Feng looked at Zhu Lao.

Zhu Lao shook his head: "It's better for you to come." ”

"The material of the depleted uranium bomb is depleted uranium, is it because of radioactivity?" A technician spoke.

"On the battlefield, when even a nuclear war may break out, who would consider radioactivity, Lao Maozi doesn't look down on depleted uranium bombs because the shelf life of this thing is too short." Qin Feng said: "The metal characteristics of depleted uranium will change with time, specifically become brittle, so after reaching a certain age, depleted uranium shells will break in the process of use, so that they cannot penetrate the target." ”

"How many years?"

"Generally there will be twenty years, but by fifteen years, the performance has already started to decline, and if you want to guarantee high enough performance, it is better to use it within ten years."

The shelf life of depleted uranium ammunition is very short, and it is nothing for the Americans, after all, the world police want the whole world to fight, and if they don't fight for a few years, they will have itchy hands, and armor-piercing shells will be used before the expiration date, and it can be seen that they are used unscrupulously on the battlefield, and they can't wait to use them all, and if they are not used anyway, they have to be considered scrapped.

Other countries do not have this advantage, just like Britain, the depleted uranium bombs produced in 2,000 years have not been used, and it costs money to scrap them, so more than 20 years later, when there was a war in a certain place, these depleted uranium bombs were all supported, although the shelf life has long passed, but the recipients of aid still have to be grateful, this is a tall depleted uranium bomb!

Lao Maozi's 3VBM13 was produced in 85, and it was only used for emergency purposes at that time, after all, there was already a big guy like Leopard 2 on the opposite side, and they wanted to enhance their armor-piercing ability, but the number of production was not much, on average, a tank was used only five, and when it came out in 87, 3VBM17 came out, it immediately became the main force, although the armor-piercing ability was reduced, but the performance was stable and could be equipped for a long time.

"Even so, we have to take into account the protection of our armor." "We have to make sure that our armor can hold off this depleted uranium projectile," Lee said. ”

The troops cannot pin their hopes on that the other side will not use depleted uranium shells, after all, when it comes to the battlefield, what can't be used?

"Next, change our composite armor targets." Zhu Lao said: "Let's see if our armor can block it." ”

The test artillery is divided into two aspects, on the one hand, to test how the armor-piercing ability of this shell is, and on the other hand, to test whether your own armor can be prevented.

"It must not be blocked, our most advanced Type 683 composite armor in China, the protection of the tail stable shelling armor-piercing projectile is only equivalent to 350 mm of penetration, and even the tungsten alloy can't block it, let alone this depleted uranium." Li Runzhu said.

What else is tested here, it's just a waste of time.

"Leader Li, 683 is already in the past, and our latest composite armor is 684." Zhu Lao said: "Put the target we brought!" ”

Feng Jinxi looked at the old liberation truck crane and looked at the armor in the carriage: "Zhu Lao, this armor area is too small, can it hit?" ”

Advanced composite armor is very expensive, so it is impossible to make the area particularly large, and now this one is used on the front of the tank turret, so the area is even smaller, the length is about one meter, the width is about half a meter, and the thickness is ...... It looks over 200 mm!

The area is too small for the tank gun to aim! How do you break this?

"Let's shoot at zero distance this time." Zhu Lao said.

Just two tests, with a direct shot of 2,000 meters, this is also the maximum engagement distance of the tank unit, after that, if the tank unit hedges, it will definitely continue to get closer, so that the penetration depth will be further increased.

After all, armor-piercing projectiles rely on kinetic energy to kill, and during flight they will slow down due to air resistance, and the closer the distance, the greater the speed, and the more powerful they are.

Now, Zhu Lao actually said that he wanted to shoot at zero distance?

Li Runzhu looked at the composite armor in surprise: "Lao Zhu, are you confident in this brand-new composite armor?" ”

"That's right, full of confidence." Zhu Lao said: "Let's try the 3VBM17 armor-piercing bullet first, and then try the 3VBM13."

"Why don't you tilt our armor?" Li Runzhu made a suggestion. When placed at an angle, it is equivalent to increasing the equivalent physical thickness, after all, the distance between the diagonal line is definitely shorter than the perpendicular line.

"No, you don't."

Zhu Lao was full of confidence, and Qin Feng was also a little curious: "Zhu Lao, our composite armor protection is so strong?" ”

"That's right, thanks to the kind of structure you mentioned, our third-generation tanks, except for the engine problem, are not a problem at present." Zhu Lao said.

Although it is said to be called zero distance, in fact, the target cannot be placed next to the barrel, otherwise the butt will not be able to fly.

In fact, when the tank tested the gun, the zero-distance shooting was generally about ten meters in front of the muzzle, and now, the old liberation truck crane hoisted the composite armor to a close-range target position and installed it in place.

"Leaders, please stay away." Seeing that Li Runzhu and the others wanted to step forward, Feng Jinxi was a little anxious, if there was any accident, where would he be responsible.

"Armor-piercing bullets, not grenades, what are you afraid of."

"Leader Li, if you take another step forward, I will call the capital!" Feng Jinxi was really anxious.

"Okay, Lao Feng, count you ruthless!"

The crowd stood two hundred meters away, watching the test gun.

Rumble!

The sound of the cannon was deafening, and the air wave rolled up the surrounding snow and poured outward, hitting everyone, but the big guys didn't care, and after the cannon sounded, Li Runzhu ran over.

"I'll see, I'll see!"

When hitting the steel target, you can see fireballs from a distance, just use a telescope, the big guy didn't get to the target, and now, shooting at zero distance, the big guy is standing close again, of course, you have to go over and have a look.

This cannon hit the left side of the composite armor, and the piercing rod of the armor-piercing bullet was pierced on it, revealing the back half, and the cold wind blew on the wings of the bomb, making a whining sound, but look like this...... It should not be penetrated!

Li Runzhu was the first to run over and looked at the back of the composite armor, the back was only slightly bulging, properly blocked!

"The penetration depth of the test just now is 400 millimeters, and our composite armor with a thickness of 200 millimeters has reached 400 millimeters, not bad, not bad!" Li Runzhu's face was suddenly full of joy.

"Come on, pull out this piercing rod and measure it specifically!"

"Hey, pour the snow on it to cool down first, be careful of burning your hands!"

The rod was pulled out, revealing a big hole inside, Feng Jinxi took out the box ruler and went in to measure it simply.

"One hundred and seventy millimeters deep, and thirty millimeters of margin, what's in there?"

If it is homogeneous steel, then what is punched out is a hole with an iron chute in a molten state, and now, this is composite armor, and after the outer layer of homogeneous steel has passed, there is powder inside, and there are shiny things, and then it is ......

"The structure is a secret."

Feng Jinxi quickly withdrew his gaze.

"Next, test 3vbm13!"

The tungsten alloy warhead is blocked, can this depleted uranium warhead be blocked? In the test of homogeneous steel armor just now, it has reached a penetration depth of 500 mm!

The big guys are sweating.

Rumble!

After the second cannon sounded, everyone rushed over again, and Li Runzhu still ran at the front, ignoring Qin Feng's words in the back.

"Leader Li, Leader Li, you wait, let's wear a mask and go over!"

"Lao Tzu is not cold, what is it to wear that thing."

Fortunately, the north wind was howling, and by the time a few people passed, the dust generated by the impact had already been blown away, and it was nothing to spread, after all, the dose was small.

Li Runzhu ran over in one go, this time, there was no need to measure.

The back of the composite armor was pierced, and most of the piercing rod was exposed, leaving only the tail part at the end!

"Well, the piercing rod didn't pass through, which means that the protection is still okay." Li Runzhu nodded: "When you get to the tank, there is an inclination, and it should not be penetrated." I wish you, you can do it! ”

If the rod flies out, there is no way to estimate how much kinetic energy is left, and now, when the rod is tied to it, it is at the standard of just penetration.

"Well, our composite armor is placed in the mezzanine of the tank armor, and the tank also has a panel and a back plate, and we can continue to increase the thickness, and we are still imitating the explosive reactive armor...... This can not only block Lao Maozi's existing armor-piercing bullets, but even if there are more advanced models in the future, there should be a chance to block them. ”

Li Runzhu's eyes widened, he just thought about placing it obliquely, but he didn't expect that there were other means!

"Lao Zhu, our composite armor protection is soaring at the speed of a rocket!" Li Runzhu was very excited: "How did you do it?" ”

Zhu Lao glanced at the T-80 tank with emotion, and then at Qin Feng: "This, of course, I have to thank Mr. Qin." ”

"Zhu Lao, these are the results of the efforts of our scientific researchers, and they have nothing to do with me." Qin Feng hurriedly said: "I've just done some meager efforts, by the way, the current explosive reactive armor still can't prevent armor-piercing bullets, it can only prevent armor-piercing bullets, and it has to be improved to have this ability......"

"Mr. Qin, do you have ideas for improvement?"

"Hmm."

"Let's go, let's go back to our 201 Institute!"