This is the first time that Qin Zhenhua has come into contact with information. Luo Ronggen helped him apply for this information. The reason for applying was not to investigate the truth of the accident, but to do a theoretical research. The research topic was to tap the potential of the 100 slide gun.
, as well as improving the accuracy of discarding sabot armor-piercing projectiles, etc.
Related topics are actually being worked on in many institutions. After all, how to penetrate the Soviet tank armor is an important topic for the troops.
The current 59 tank can't do it, and the current 69 tank can't do it either!
After opening the information with the words "Top Secret" printed on it, Qin Zhenhua clearly understood how heavy the trust was and how much risk Luo Ronggen had taken for it. This was his support for him, and of course he could not give up.
Find out why that tank exploded!
The 59 tank and the 69 tank seem to have the same appearance. When Qin Zhenhua first came over, Liu Jianzhi wanted to use this difference to brag, but unfortunately, Qin Zhenhua easily pointed it out.
The biggest difference, of course, is the tank gun!
That year, during the conflict on a certain island in the north, the country obtained a complete T-62 tank. For military personnel, this tank was of great significance because it was equipped with a 2A20 115mm smoothbore gun.
It is also the world's first standard smoothbore tank gun.
After studying the tank gun of this tank, domestic military industry personnel trial-produced the Type 69 100mm smoothbore gun based on the Type 59 100mm rifled gun with reference to the 2A20 technology.
After replacing this kind of tank gun, the troops were very happy and hurriedly equipped a batch of them. However, they found that they were completely useless.
It is said that the rifled gun of the 59 tank can only fire traditional sub-caliber discarding sabots, while the smoothbore gun of the 69 tank can fire tail-stabilized sabots that represent the world's advanced level!
Putting the two types of artillery shells together, you can find that the latter has a longer core, just like an arrow. During flight, it is stabilized by the wings at the tail. At the same time, because the core is longer, it is more effective against
Highly sloped armor has better penetration and is less likely to ricochet.
These are all theoretical. After the troops used them, they found that the penetration depth of this shell was not much improved compared with the tank gun of the 59 tank. Moreover, the wing stability was not good and was not as good as the rotating shell of the rifled gun.
It is unstable, causing it to fly out in a fluttery manner, and the hit is not deep and inaccurate. So, what is the use of it?
Since the troops were equipped in 1975, there have been a lot of complaints from the troops, so the tank factory also started research. Qin Zhenhua's father invested a lot of energy in this.
As a result, something happened to my father.
After turning over these documents, Qin Zhenhua's father's figure appeared in front of his eyes. He tried hard to give up his memories and read the documents with concentration.
It was very quiet in the workshop late at night, except for Wang Erzhu's heavy breathing.
After Qin Zhenhua moved the bedding to the workshop, Wang Erzhu followed him. He imitated Qin Zhenhua's behavior every day and read thick books. This change puzzled Qin Zhenhua. When he asked Wang Erzhu, he answered very well.
simply.
I want to be like you and amaze everyone in the next factory competition!
At that time, Qin Zhenhua's erudition shocked the whole factory. After that, this incident became the most exciting scene of the competition and was spread throughout the factory. Of course, the communicators even more vividly exaggerated the incompetence of the R&D room, and also
If I want to give you questions, no one in the R&D room can!
Knowledge is power! Wang Erzhu also determined to be a person like Qin Zhenhua.
As for coming to the workshop, it was for convenience when I was doing surveying and mapping last time, so I could modify the CNC machine tool program at any time. As for now, Qin Zhenhua is used to it and is too lazy to carry his own bedroll.
In the workshop, with so many tanks around, sleeping here is extremely comfortable.
The structure of the tail-stabilized discarding sabot armor-piercing projectile seems to be very simple. There is a core in the middle, with a sharp front, four tail fins at the back, and then in the middle of the core, there is a disc-shaped bullet holder. This is because the bullet
The diameter of the core is much smaller than the muzzle, so adding this bullet holder just blocks the barrel and uses all the gas to accelerate the projectile. Then, when it flies out, the bullet holder is useless and has to be thrown away.
Lose.
The middle disk is the structure of a single cartridge holder, which is copied from the Soviet 110mm armor-piercing projectile. Now, this information has been clearly written.
After research, some comrades in the No. 1 Machinery Factory believe that the reason for the low accuracy of this armor-piercing projectile is not only the drift of the core, but more importantly, the momentary disturbance when the shell is removed when the shell flies out of the muzzle, causing
The fundamental reason for the instability of armor-piercing projectiles and the greatly reduced accuracy is the insufficient processing accuracy of the bullet holders. Therefore, if you want to improve the accuracy of artillery shells, you must improve the processing accuracy of the bullet holders...
Time is passing by, unconsciously, quickly.
In the R&D room, almost all the technical backbones were troubled by the transmission system on the M48 tank. They originally thought that it would not be difficult to map and imitate it, at least it would be no problem to move it without considering the lifespan.
However, in actual operation now, this is not the case. They have no experience in the research and development of hydraulic transmission at all. They just copy the gourd, and once there is a problem, they have no idea where the problem is.
The torque converter is completely fine, but there is a problem with the transmission system behind it!
"Is it a problem with the filter?" Song Weize said with red eyes.
"No, we have already cleaned it." Du Youwen said, "I think we should disassemble the gearbox and take a look!"
Remove the gearbox?
This is a big project!
When they were assembling it, they also spent a lot of effort to assemble the gearbox. Now if they have to disassemble it, it is equivalent to all the previous efforts being in vain.
"Tear it down!" Song Weize said, "If you don't take it apart, you won't be able to find the problem."
It took them a whole day to disassemble the gearbox. When the planetary gear inside was taken out of the gear oil, they were all stunned.
The processed gear has a silvery metallic luster. It is made of high-strength steel. But now, a layer of bright gray appears on the surface of the gear, as if it has been quenched. Everyone familiar with it knows
, this is due to the lack of lubrication leading to dry grinding of the gears. If it is serious, the gears may be stuck together and cannot be separated.
However, there is obviously enough lubricating oil inside!
However, this at least illustrates one problem. It is really their problem and has nothing to do with the front torque converter!