This is the first time Qin Zhenhua has come into contact with the information, this information was applied for by Luo Ronggen for him, the reason for the application is not to investigate the truth of the accident, but to do a theoretical research, the research topic is to tap the potential of the 100 slide gun, and improve the accuracy of the shell-piercing shell, etc.

In fact, many institutions are working on related topics, after all, for the troops, how to penetrate the tank armor of the Soviets is an important topic.

The current 59 tank can't do it, and the current 69 tank can't do it!

Flipping through the information printed with the words top secret on it, Qin Zhenhua of course knew very well what a heavy trust he had, and how much risk Luo Ronggen took for this, this was his support for himself, of course he couldn't give up, he must find the reason why the tank exploded!

59 tanks and 69 tanks, it seems that the appearance has not changed much, 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!

In that year, in the conflict on a northern island, the country obtained a complete T-62 tank, which is of great significance to military personnel, because it is equipped with a 2A20 115 mm smoothbore gun, which is also the world's first standard smoothbore tank gun.

After the study of the tank gun of this tank, domestic military personnel trial-produced the Type 59 100 mm smoothbore gun with reference to the technology of the 2A20 on the basis of the Type 69 100 mm rifled gun.

After replacing this tank gun, the troops were very happy and hurriedly equipped a batch of them, but it turned out that this was completely chicken.

It is said that the rifled gun of the 59 tank can only fire the traditional sub-caliber shell-out armor-piercing shells, while the smoothbore gun of the 69 tank can fire tail stable armor-piercing shells that represent the world's advanced level!

When the two shells are put together, you can find that the latter has a longer core, like an arrow, and in flight, it is stabilized by the tail wing, and at the same time, because the core is longer, it has better penetration against large inclined armor and is not easy to ricochet.

These are all theoretical, and after the troops use it, it is found that the penetration depth of this shell is not much improved compared with the tank gun of the 59 tank, and the stability of the wing is not good, and it is not as stable as the rotating shell of the rifled gun, which causes it to fly out and float, and it is not deep and inaccurate, so what is the use of it?

Since the equipment of the troops in 1975, the complaints of the troops have been great, so the tank factory has also begun to research, and Qin Zhenhua's father has invested great energy in this.

As a result, my father had an accident.

Flipping through these materials, Qin Zhenhua's father appeared in front of his eyes, and he tried hard to let himself give up his memories and look at the materials intently.

In the workshop late at night, it was very quiet, only the heavy breathing of Wang Erzhu.

After Qin Zhenhua moved the futon to the workshop, Wang Erzhu followed, and he also learned Qin Zhenhua's appearance every day, looking at the thick book, this change made Qin Zhenhua puzzled, and asked Wang Erzhu, and he answered very simply.

I also want to be like you, and in the next factory competition, I will amaze the audience!

At that time, Qin Zhenhua's erudition shook the whole factory, and after that, this incident became the most exciting scene of the big competition, which was spread all over the factory, of course, the communicators even rendered the incompetence of the R&D room to the fullest, and wanted to give everyone a question, but no one in the R&D room would not!

Knowledge is power! Wang Erzhu is also determined to be a person like Qin Zhenhua.

As for coming to the workshop, it was for convenience when I was engaged in surveying and mapping last time, and I modified the program of CNC machine tools at any time, but now, Qin Zhenhua is used to it, and he is too lazy to move his own cover roll.

In the workshop, there are so many tanks around, sleeping here, extremely comfortable.

The tail stabilized shelling armor-piercing projectile, it seems that the structure is very simple, in the middle is a core, the front is pointed, and the back is four tails, and then in the middle of the core, there is a disc-shaped butt, this is because the diameter of the core is much smaller than the muzzle, so, with this butt, just block the barrel, and use all the gas to accelerate the shell, and then, fly out, the butt is useless, and you have to throw it away.

This middle disc, the structure of the single butt, was copied from the Soviet 110-mm armor-piercing bullet, and now, on this material, it has been clearly written.

Some comrades of the No. 1 Machinery Factory, after research, believe that the reason for the low accuracy of this armor-piercing projectile is not only the core of the bullet floating, but more importantly, when the shell flies out of the muzzle, the momentary disturbance of the shell is removed, which causes the instability of the armor-piercing projectile, and the accuracy is greatly reduced.

Time is passing, unconsciously, passing quickly.

In the R&D room, almost all the technical backbones are having a headache with the transmission system on the M48 tank, and they originally thought that the difficulty of surveying and mapping imitation is not great, at least without considering the lifespan, it is no problem to move.

However, now in actual operation, it is not the case, they have no experience in the research and development of hydraulic transmission, according to the gourd to draw the scoop, once there is a problem, they don't know where the problem is.

The torque converter is completely fine, there is a problem with the transmission system in the back!

"Is it a problem with the filter?" Song Weize, who was red-eyed, said.

"No, we've cleaned it." Du Youwen said: "I think, let's take a look at the gearbox!" ”

Dismantling the gearbox?

That's a big project!

When they assembled, they also wasted a lot of effort to assemble the gearbox, and now they have to disassemble it again, which is equivalent to all the previous efforts in vain.

"Let's tear it down!" Song Weize said: "If you don't open it, you can't find the problem." ”

It took a day to disassemble the gearbox, and when the planetary gears inside were taken out of the gear oil, they were all stunned.

The processed gears are 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, and those who are familiar with it know that this is because of the lack of lubrication that leads to dry grinding of the gear, and if it is serious, the gears may also be bonded together and cannot be separated.

However, there is plenty of lubricating oil in it!

However, this can at least explain a problem, and it is really their problem, and it has nothing to do with the torque converter in front!