Chapter 462 Don’t hang yourself on a tree, there are many ways

The new main battle tanks that the East and the West are about to equip, whether it is T-62 or M-60, the turret top armor and the hull top armor, cannot withstand this penetration. Of course, if there is a small probability event that the side armor or the top of the front armor penetrates downward, then they are lucky.

The penetration depth of 80mm, let alone the current ones, can also hit tanks from decades ago, as long as they are not as crazy as the Russians who explode on their heads. The armor on top of the tank body is very brittle.

As for the overhead counterattack, the 150mm penetration depth cannot be hit either, which is quite a waste.

Otherwise, everyone wouldn't have racked their brains to reach the top in the future, and even had such a magical structure as Sweden's Bill anti-tank missile.

Moreover, the targets of terminal-sensitive projectiles include not only tanks but also armored vehicles, equipment vehicles, etc. These things are all equal under the penetration depth of 80mm.

However, Professor Luo obviously felt unsatisfied.

"Mr. Gao, can you find a way to make it higher? I have analyzed the material requirements for the liner you mentioned, and I think tantalum is OK."

"It's expensive, and there's not much of it. Let's use it somewhere else." Gao Zhendong is very clear about the distribution of tantalum. my country discovered it later, and the quantity was quite large, but there wasn't much of it at this time.

If the tantalum shield is well designed, it can indeed have a penetration that is about 30% higher than that of copper. But again, this thing is not necessary, and it is not the only thing that can improve penetration. There are many other materials that can improve penetration.

However, Gao Zhendong had already made preparations. He added, "But don't worry. Just use copper first. The penetration depth is enough. If the situation develops and it is necessary, I have other materials that can replace tantalum."

If the technology is not good, you can make do with materials, or if you are a little ignorant, or if tantalum is easily available, then you will stick to tantalum. However, we are the opposite with EFP charge liners. The technology is good, but there was not enough tantalum in the early days, so we did not use that thing.

Gao Zhendong started working on materials not long after his career started. It was not just a spur of the moment idea. The process used for medicine caps was just a little different, but Gao Zhendong happened to know this process.

After listening to Gao Zhendong's words, Professor Luo felt relieved. The 80mm penetration of copper was indeed enough.

The main reason is that they have just started, and he is afraid that some reason will further affect the penetration depth during the process, which may not be enough, so he is just seeking insurance.

It has to be Mr. Gao, who had already thought about it all, and also took into account cost, performance, and material sources. Unlike me, I can only rely on tantalum.

Gao Zhendong also made a suggestion: "You can work on the charge structure and charge density. There is still potential."

The charge structure will affect the penetration depth, and when the charge type and structure are certain, the charge density directly affects the armor-piercing power.

A word awakened the dreamer: "Mr. Gao, when you mentioned this, it suddenly occurred to me that there is indeed room for improvement in the charge density and charge quality!"

Gao Zhendong did know that there was a technology somewhere, and it was developed by him reminding others. He heard that the other party even listed his name in the results. Maybe it would be useful to Professor Luo, but it was not easy to say it directly now, so he had to ask.

"I do know something that might be useful to you, but I have to ask first. You know the rules, haha." Gao Zhendong said with a smile.

Professor Luo didn't expect there would be an unexpected surprise, and he thanked him repeatedly: "Mr. Gao, thank you so much, there are so many ways to increase the power, but I didn't try them out. I just changed the materials to be lazy. I still don't keep up with the times, haha."

Because he brought up the issue of the warhead at the beginning, Gao Zhendong talked to him about this first, and now that he had almost finished talking about it, Gao Zhendong turned back to talk about the overall structure of the terminal-guided munition.

Although the overall structure looks simple, it can be fatal if it is not designed well.

The Russians' terminal-sensitive shells are a typical example of this weird thing. Their SPBE-D places the sensor next to the warhead, parallel to the warhead, resulting in about one-third of the ammunition caliber being wasted by this sensor. When our and the Americans' terminal-sensitive shells can be stuffed into 155mm guns, theirs can only be stuffed into large-caliber ammunition such as bombs.

As for the argument that the Russians couldn't fit the 155 because the copper charge was not as powerful as tantalum, which made it bulky, black and thick, it's not all nonsense, but at least it's biased.

The Russians are not that bad at ammunition design. It's not that they can't get tantalum. It's also not that they can't design or get the ammunition structure that we and the Americans use. The appearance and structure of the terminal-guided projectile were all over the domestic "Three Major Knowledges" in the 80s.

The final result can be said to be more appropriate after comprehensive consideration by the Russians. It is estimated that they did not intend to use this thing on a barreled artillery from the beginning, so they simply made it bigger.

Moreover, when they started to work on this, the Russians were already dying, and all kinds of strange things could happen.

But no matter what, the Russian thing is still very weird.

Gao Zhendong called a few people over and told them about his idea of ​​the terminal-sensitive bomb structure. In fact, it is very simple. There are pictures of this thing everywhere on the Internet. The front is the warhead, the back is the detector and controller, and the back is the parachute.

At first glance, the optical window of the sensor is blocked by the warhead, and the two axes cannot be parallel. The clever thing is that after the submunition is ejected, the warhead will rotate 180 degrees around an eccentric axis, thus revealing the optical window of the sensor and ensuring that the two axes are parallel. The distance between the two axes is even closer than that of the Russians, which is undoubtedly beneficial for more accurate shooting.

To be honest, before Gao Zhendong came up with this structure, both Engineer Lu and Professor Luo had racked their brains for the structure of this terminal-sensitive projectile, mainly because the caliber was too small.

110mm, and sensors need to be arranged, it’s really impossible to do it.

This time, Gao Zhendong solved all the problems by drawing this simple eccentric rotating shaft structure.

"Boss Gao, your structure is amazing!"

"Yes, I was worried. I thought about it for a long time but couldn't come up with a solution. This is such a coincidence."

“The structure is simple, but it can solve the problem!”

"Moreover, once this structure is deployed, it can naturally solve the scanning angle problem of the infrared detector by relying on the fixed relationship between the centers of gravity of the two, without the need for special design."

"..."

Engineer Lu and Professor Luo were full of praise, and they recalled the fear they had felt when they were dominated by the many fantastic ideas related to structures that Gao Zhendong had come up with earlier.

For example, the orthogonal quaternion detector, or the front-loading launcher of a gun-mounted grenade launcher...

After the two admired each other for a while, Professor Luo's biggest problem was solved, and Engineer Lu took out the results of his preliminary work.

"For target detection and firing, my consideration is to set a lower limit of the temperature difference with the background, and use a holding circuit to record a certain amount of over-limit data values. Based on the relationship between these over-limit values ​​and the number of over-limit values, combined with the rotation data of the projectile, the ammunition is detonated according to a certain law. As for this law, it still needs research and testing."

As expected of an infrared detector expert, Mr. Lu has figured out some solutions. Moreover, these solutions can be solved using mixed analog-digital circuits and do not necessarily require the use of computers. As for whether they are useful or not, more research and testing is needed.

Gao Zhendong nodded to this, without expressing any further opinions. He said that Engineer Lu had his own experience in this regard, so he should just let him express himself freely. This was not what Engineer Lu wanted to discuss.

"I thought that based on the distribution pattern and dispersion of this ammunition, we don't need to worry about the problem of resolving the repeated scanning of the same target by multiple ammunition. At most, several rounds can hit the same target at the same time, which is also a profit."

Mr. Lu simply gave up on repeated target identification, there was no need for that.

"Well, your idea makes sense. We should focus on the big issues and ignore the small ones. We don't need to solve the difficult ones. And with a reasonable scattering density and distribution, and a well-designed scanning range, this problem can be solved to a considerable extent."

The problem of resolving multiple bullets and repeated scanning involves issues such as inter-bullet communication, which is very troublesome to solve. Moreover, it is a small matter to begin with, and spending a lot of effort and high cost to solve it is purely a waste of time.

"The remaining problem is the biggest one: the ignition point and avoiding secondary attacks. I have thought about this for a long time. I can set an upper limit for the temperature difference. Once the upper limit is exceeded, it can be determined as the ignition point or the target has been successfully hit. However, although this method is simple and cheap, there will still be some problems for the edge areas of such targets."

To put it bluntly, the temperature gradient area around the fire point must contain an area that overlaps with the preset strikeable temperature difference zone, and at this time it is possible to be judged as a target.

Gao Zhendong thought about it and made his own suggestion: "You have two ways. One is to use the rotation data to determine the positional relationship between these areas and the ignition point. Don't shoot if they are too close. In this way, the simplest way is to just use a delay circuit to lock the firing circuit after scanning the ignition point, or block the data holding circuit to not record the temperature difference data. The delay time is determined according to the rotation speed of the projectile."

Engineer Lu's eyes lit up: "Well, what you said is also a method. With careful design, it can solve big problems with little cost."

When solving an engineering problem, sometimes it is not necessary to solve it completely. What is needed is to reduce the probability of an error event to an acceptable level. This is different from the idea of ​​talking about it on paper.

Gao Zhendong smiled and said: "If you don't care about the cost, there is another way, that is to use a two-color sensor."

A dual-color sensor is not necessarily an ultraviolet/infrared dual-color sensor. Different bands of infrared can also be dual-color. Moreover, certain bands of infrared sensors are sensitive to flames. This principle can actually be used to determine the ignition point.

To put it simply, the output of the flame-sensitive band is used to lock the action of the entire infrared sensor.

(End of this chapter)