Originally, I came to the capital just to see the T-72. This is the first time in the domestic tank engineering field that I have held an advanced tank in my own hands. Although I have seen it before, it is impossible.
In this way, you will be exposed to it every day and do whatever you want.
However, once you really get in touch and want to leave, it will not be easy, especially in the Tank Design Institute, there are meetings almost every day. After the meeting, Qin Zhenhua has to be invited to attend.
If you don't go, it would be too disrespectful. A small person like Qin Zhenhua was called to attend the meeting by a group of experts in the field of tank design. How could there be a reason not to go? Once you go, you can still get something in many cases.
Harvest.
When everyone was having a meeting, Qin Zhenhua could still think of the contents in these meetings, which had a perfect effect on his second-generation tanks. Therefore, every time he wanted to leave, he felt that it was time to go back, but he still stopped in the end.
On that day, the conference room started to discuss it enthusiastically again.
"Our tanks pursue low appearance and limited internal space of the vehicle body. Therefore, we believe that automatic loaders are one of the necessary equipment, so we should adopt the T-72 tank firepower deployment plan.
"The person who spoke was Mu Guijin. He has been surveying and mapping the automatic loader in detail these days. He is more satisfied with this automatic loader the more he looks at it.
"No, we think that from the potential of armor-piercing bombs, the full-packed ammunition has advantages in the score, so we recommend that the best use of full-packed ammunition, and we have been studying 120mm for more than ten years.
The performance of the tank gun has gradually matured. We should not give up all the current scientific research results and re-engineer the 125mm tank gun." Xie Huimin from the Second Machinery Factory said.
The top of the tank has been handed over to Qin Zhenhua, but Qin Zhenhua only planned to compare and did not plan to make a decision. So when everyone talked about this, both sides were going back and forth, constantly expounding their respective ideas.
The second machine factory originally built guns, so now, they have developed 120mm tank guns that are almost mature. They really don’t want to push them all down and start over just because they have a T-72 and make all their efforts.
Turn into bubbles.
This is unacceptable.
"Yes, and now we have the technology of self-tightening of the body tube, and the chamber pressure in the barrel is getting higher and higher. Our current 120mm tank gun has a performance that is completely greater than that of the current Soviet tank guns.
” Nie Jianqiang said.
For tank guns, when the barrel caliber is a certain, the power can still be increased by adding more launching drugs, that is, larger shell barrels.
However, the more medicine is fired, the greater the pressure it is in the barrel, which requires the thicker the barrel, otherwise it will explode.
In this way, the barrel will be more heavy.
At this time, if you want to change, you have to implement it from a process perspective. The use of electroslag remelting steel and self-tightening of the body tube are all prepared to increase the chamber pressure and reduce the quality.
In this regard, we can compare the domestic 100mm rifled gun with the introduced L7 type 105mm rifled gun. The latter's barrel is obviously thicker, but the mass is lighter, and at the same time, the chamber pressure is even greater.
This is the benefit of advanced technology.
Now, these technologies have begun to be mastered by the second machine factory.
"Take our current 120mm smoothbore gun as an example. When it was designed, in 1967, the chamber pressure was 430 megapas. By the mid-1970s, the chamber pressure increased by 25%. At that time, it was already in the same state.
The current Soviet tank guns have almost the same pressure."
Now, the Soviet Union's 125mm smoothbore gun codenamed 2A46. The maximum chamber pressure this smoothbore gun bears is only 550 megapas, which is not high at all.
"In order to match the second-generation tanks and storm tanks, we have developed the third-generation 120mm tank gun. At the same time, due to the advanced technology, we plan to finally develop the product, the fourth-generation 120mm smoothbore gun.
, On the basis of 20% reduction in mass, the maximum chamber pressure will be close to 900 megapas." Xie Huimin blurted out these data.
The maximum penetration depth, maximum range, and bore out speed. This 120mm tank gun from our side is definitely the most powerful!
Especially, it has a 50-caliberated caliber, and now the Leopard-2 tank gun is only 44 times the caliber. Therefore, if compared, the 120mm tank gun that it is developing can be said to be the world's number one.
Of course, it would probably make people laugh at it now, so he didn't mention it, but he really thought so in his heart. We have already created the world's number one tank gun. Now, are you going to change the caliber?
This is what it is to play.
The research and development of a tank gun is not easier than the development of a shell. It requires reasonable balance of the strength design of the body tube, strength verification and safety factor, etc. according to the yield strength of the material, the chamber pressure curve, etc. At the same time, in order to ensure that
Safety, when tightening, there is a certain amount of processing allowance for the inner chamber diameter and outer diameter. At the same time, the choice of the pharmacy chamber must also undergo multiple shooting tests.
The second machine factory is a gun manufacturer. In this regard, they are authoritative. They already believe that the 120mm tank gun at hand is the best, so they have always insisted on using this tank gun.
"Zhenhua, what about your opinion?" Wang Tianming asked Qin Zhenhua.
Qin Zhenhua, who attended the meeting, waved his hand: "I have no objection now."
"You kid, what are you afraid of? Mr. Zhang and the others are not here now, and it is not a final meeting." Wang Tianming said.
"Cough, cough, I'm not afraid of anything. I'm not afraid of heaven or earth. I offended everyone. Are you still afraid of saying the wrong thing?" Qin Zhenhua said: "But I know everyone's own ideas. Now, how to get the best one
Good balance.”
It is indeed a pity that our side has been developing the 120mm tank gun that has been developed for so many years, but suddenly gave up. Moreover, how should we solve the problem of armor-piercing shell arrangement caused by the distribution of 125mm tank guns and shells?
These are not yet concluded in my mind.
At this moment, suddenly, the door was pushed open, and a middle-aged man hurried in, his face looking a little ugly.
"Not good." He came to Qin Zhenhua and said to everyone, "Our first batch of 20 69 tanks exported were rejected by the exporting countries. They even protested to us, saying that
Our products, and the products tested, have completely different performances.”
The impact of this incident will be quite far-reaching, and everyone's face will change drastically after hearing this.
Qin Zhenhua just frowned: "How come we exported the first batch of 20 vehicles? Aren't 200 vehicles exported together?"