Chapter 675 Comrades who are eager to get more
You know, this open source database was actually managed and updated by one of the world's largest commercial database companies in his previous life. Its functions and performance are absolutely top-notch. Not to mention the basic functions of the database, it can meet all the needs of most software for structured databases until the 21st century.

Gao Zhendong thought about it and decided that this source code was the result of practice, but it did not involve much database theory.

Gao Zhendong was a good person and wanted to help others. He rummaged through the system data and produced a book called "Database Technology". He specially selected this book, which mainly contains theoretical content about database, but not much application part.

As a result, what Gao Zhendong spent the most time on regarding the database was replacing all the contents of the book, including application examples, with the simplified version of the database in his hand.

Fortunately, there is not too much content, otherwise it would be really troublesome.

When it was time to eat, Lou Xiaoe said, "By the way, Zhendong, my family called today and my brother will be back soon."

Gao Zhendong was startled. He calculated the time and it was not too long. It was almost time for him to come back. It was just right. When he came, he could discuss something with him.

I just don't know whether this brother-in-law has found a sister-in-law for Lou Xiao'e.

However, this "immediately" probably means a long time. When the call was made, Lou Shouxing was probably still in Hong Kong Island. It was impossible for him to arrive tomorrow just because the call was made today.

A lot of common sense that Gao Zhendong used when traveling through time is no longer applicable these days. For example, most provincial capitals can be reached by rail within 12 hours.

But it is very difficult at this time, let alone 12 hours. If you are unlucky or the distance is far, you may not be able to arrive in time even in 120 hours.

However, for Lou Shouxing, speed is not a problem, as he can complete the flight by plane. What is troublesome for him is the procedures and preparations, which take a lot of time.

Gao Zhendong was revising a book on database technology while doing other things.

That day, he had just finished his class at Beijing University of Technology and was walking towards his office.

Now the second phase of the SZ61 supporting plan has been placed in the 61th Ministry of Machine Building, so there is naturally no need to go to classroom to answer questions and resolve doubts.

Before I even reached the office, someone called me.

"Professor Gao, please stay."

The voice sounded familiar. Gao Zhendong turned around and saw it was Professor Luo.

Professor Luo has been working on the terminal-sensitive munition since the gun-mounted grenade was finalized and put into mass production. However, he rarely needs to find Gao Zhendong, so everything has been going smoothly.

He called me today, is it because there is a result about the terminal-guided missile?
Gao Zhendong greeted Professor Luo happily.

"Professor Luo, what's your good news? Is it about the end-mining bomb?"

Seeing Professor Luo’s happy face, Gao Zhendong guessed.

If there wasn't good news about the terminal-guided bomb, he wouldn't be like this.

"Yes, yes, the news is both good and bad, but overall it is positive." Professor Luo said with a smile.

"Oh? Tell me about it." Gao Zhendong said with a smile.

Professor Luo first handed him a stack of information: "The ground fixed armor-piercing test has been done, take a look."

This stack of information includes photos and text reports.

Gao Zhendong flipped it open and took a look, then smiled: "Oh, this is really good news, the depth is good."

The self-forged fragmentation warhead made by Professor Luo and his team has an armor penetration depth of no less than 90mm below the designed blasting height. Gao Zhendong is actually very happy with this number.

Although it is less than one centimeter, apart from the front armor of the tank, not many can withstand this penetration.

Not to mention that this generation of Western tanks are basically all fragile. At this time, armor-piercing shells are in conflict with each other. Shells have the upper hand because of the prevalence of shaped-charge warheads. Composite armor has not yet been introduced on a large scale. In fact, ours is the only one that has been put into use.

Therefore, tanks of this era are at a point where the argument of "armor is useless" is prevalent due to the emergence of shaped-charge armor-piercing devices and missiles. Every one of the tanks of the Oceanic Treaty Organization is basically fragile.

Take the AMX-30 of the Gallic Rooster as an example. If we ignore the inclination angle, the front armor thickness of this thing, except for the artillery shield, is only 80mm. Taking into account the inclination angle, it is only about 170~200mm. Basically, it can only bully armored vehicles and run away from anyone it sees. It can only bully its traditional sphere of influence - those small countries in Africa.

By the way, this thing has good mobility and runs quite fast. Maybe it is the most suitable thing for the Gallic chicken. Even though it can't fight, it can run away.

As for other positions, they are simply unbearable to look at. The top armor is 20mm, the top of the engine is 15mm, and the side armor is 30~40mm.

Therefore, the 90mm penetration is more than enough to hit the AMX-30's main armor, because this 90mm is shot from top to bottom, and the AMX-30's main armor inclination does not have much significance. It can be said that with this penetration, as long as the luck is not too bad, it will be no problem to hit all the second-generation tanks of the Oceanic Treaty Organization.

Gao Zhendong nodded as he looked at it: "Well, finally the uncooled mercury cadmium telluride dual-band was selected?"

Professor Luo smiled and said, "Yes, in order to save cost and volume, we use an uncooled mercury cadmium telluride dual-band detector. This way, without the need for cooling, the cost is further reduced. And the simpler the structure, the easier it is to reinforce it."

This thing doesn't have to be equipped with cannonballs right from birth, but at least it has to be equipped with rockets, and it must be able to withstand certain environmental conditions such as acceleration and vibration.

Gao Zhendong confirmed: "Is the performance of the infrared detector sufficient?"

Without cooling, the performance of infrared detectors will decline.

"We have tested it and it is sufficient. For targets that are moving or have had their engines shut down for less than half an hour, the ignition rate is above 85%. Moreover, the false triggering rate of the dual-band detector for typical interference sources such as fires is no more than 10%."

As long as it is a running motor vehicle, the engine temperature must be high. Even if it is turned off, it will not cool down in a short time.

In Gao Zhendong's previous life, he had driven an SUV, and the temperature of the engine remained high even after being turned off for half an hour, not to mention the huge engine of an armored vehicle or a heavy truck.

"Well, this data is pretty good. It's OK as long as the probability of making mistakes is low enough. It's impossible to completely eliminate it."

If we really want to push these data to the limit, we will have to use methods such as infrared imaging, which is obviously a bit unrealistic these days.

Professor Luo was also very happy to hear Gao Zhendong's words. Most of his research work was to pick and choose, freely combine the technologies provided by Gao Zhendong, and finally select the most suitable combination of comprehensive performance, function and cost.

This job cannot be said to be easy, but at least it can be said to be not difficult.

After reading it, Gao Zhendong smiled and said, "This thing is already well made. Is there any bad news?"

In his opinion, although this terminal-sensitive munition has not yet been tested on the dispenser and rocket, the partial tests that have been completed are already very good.

In the current field tests, the comprehensive hit rate is not less than 55%. This is because as long as it is dropped into the designated area and the two problems of "misfire and accidental fire" are solved, the other problems of this bullet in terms of hit rate are not too big.

Although 55% may not seem as high as the 70% or so hit rate of missiles, it is actually very amazing when it can hit a large area.

The first generation of terminal-sensitive bullets used by the Russians more than ten or twenty years later had a lower hit rate than this one.

Professor Luo smiled helplessly: "Well, the troops used this to attack our composite armor and explosive reactive targets."

Huh? Gao Zhendong was stunned for a moment, then burst into laughter. This was indeed something they could do.

Be lenient with the enemy, be extremely lenient, what we have, the enemy will also have.

As for the penetration depth of this bullet, the composite armor used on the front main armor of the second-generation tanks is undoubtedly a bit over the standard, and it is really impossible to penetrate it.

Compared with explosive anti-reaction, even though this self-forged fragment is equivalent to an armor-piercing projectile after being formed, and explosive anti-reaction is better at preventing fragmentation than preventing penetration, but 90mm is still not enough for Gao Zhendong's explosive anti-reaction improved by using double anti-throw plate technology.

Gao Zhendong smiled and asked, "Did you penetrate it?"

Knowing that these two things were the work of Gao Zhendong, Professor Luo shook his head and laughed, "You think too highly of me. I can't penetrate them, not even one. You are too hard to make these two things."

"What do they mean?"

"They didn't think about penetrating these two things. After all, they knew where they were used. They just wanted to see if they could make the penetration of these things more than 120mm. They also had evidence, saying that the 61mm caliber 80 rocket had a penetration of 550mm, and the 61mm caliber Red Sword-120 missile had a penetration of 650mm. So the 110mm penetration of this 90mm caliber missile was too low."

Gao Zhendong didn't know whether to laugh or cry. Hey, what these comrades did made a lot of sense.

He thought for a moment and said with a smile, "No need, just follow this. The set design indicators cannot be changed at will. The armor-piercing principles of these bullets are different, and the shapes and structures of the charges are very different. How can they be compared like this? To ensure the ultra-large explosion height of the self-forged fragments, the high armor-piercing ability of the shaped-charge armor must be sacrificed. If they ask again, just say that I said it was enough."

In fact, 90mm or 120mm is meaningless for the current tank top armor, because the lethality is excessive and it is unnecessary.

With Gao Zhendong taking the blame, Professor Luo was completely relieved. He knew that Gao Zhendong was still somewhat special in the army.

It is really pleasant to work on Professor Gao's project. Not only is he responsible for solving problems for you, but he is also absolutely clear about helping you when it is time to do so. This makes the comrades in charge of specific matters feel very comfortable doing their work.

Gao Zhendong shook his head and laughed: "Besides, they may not be able to afford the 120mm penetration."

(End of this chapter)