"Our tank guns are also missing thermal sheaths." Qin Zhenhua said: "This project was originally the second batch of projects introduced by the British. Now, I hope that our relevant departments can work harder. ”

"Heat sheath? That heat sheath, does it really work? At this time, Xie Huimin on the side made a voice again: "In the past, our gun barrel did not have a thermal sheath, didn't it also work?" ”

"That's right, it used to be like this, but how accurate were the tank guns of the past capable of hitting two thousand meters?" Qin Zhenhua asked.

Now, many people in China do not realize the importance of this problem, and even this second machine factory, which specializes in making artillery, has not paid such attention to it.

However, the accuracy is different.

The basic idea of the thermal sheath is that because the sun burns the gun barrel in the hot weather, the temperature of the side of the gun barrel is sunburned, and the principle of thermal expansion and cold contraction can know that the side with high temperature expands, so the gun barrel bends downward, droops down the head, and is wilted.

Of course, this arc is not visible to the naked eye, but it has an impact when firing the cannon, and it is not accurate.

What are the implications?

If, as before, it mainly relies on visual aiming, it is enough to hit five or six hundred meters, in this case, the thermal expansion and contraction really do not affect anything, but if you want to pursue accurate aiming at a distance of two thousand meters, then the difference between the cold and contraction of this heat wave must be taken into account, after all, the slightest mistake is a thousand miles, and the slight deformation will be magnified because of the distance factor.

We have introduced the L7 tank gun, and what we like about it is its outstanding performance, high chamber pressure, long range, and high storage speed, so you can't be inaccurate, right?

In fact, a lot of weapons and equipment in China are in accordance with the Soviet viewpoint, the Soviet system, pay attention to the five major and three coarse, can be quickly manufactured in wartime, the requirements for precision is not high, and in the Western world, there is no way to fight equipment, fight people, can only try to improve the long-range strike capability, and strive to destroy the enemy more before the other side is close, these are two completely different ideas.

Take the sniper rifle as an example, if the domestic production, if put in the international market, it is not enough to meet the standard of the sniper rifle, when the domestic sniper for the first time learned about the accuracy of the Western sniper rifle, the feeling, the psychological gap, is simply shocking.

The principle of this thermal sheath is also very simple, since it is because the sun is expanding on one side, then, I just let both sides of it be consistent?

The thermal sheath is an aluminum round tube, which is set on the outside of the entire tank barrel, so that because of the good thermal conductivity of aluminum, the energy accumulated on the side exposed to the sun can be transmitted to the other side after wrapping the barrel, so that the temperature difference between the two sides of the barrel is very small, and the degree of deformation is very small, which is more accurate than that without a thermal sheath.

At a distance of two kilometers, this factor is very important.

To put it simply, it is shade and coolness.

However, don't look at this small aluminum alloy sleeve, the difficulty of manufacturing is also very great, and it is necessary to cut it out with a whole piece of aluminum alloy, which is too wasteful and the cost is quite high.

At present, there is no effort in this thermal sheath in China, and the reasons are naturally many.

"Yes, in the future, we will move closer to the standards of the West, and this thermal sheath must be made." Huang Lao said: "We should urge the relevant departments. ”

The matter of the heat sheath, even if it is so decided.

The visit was not carried out for a long time, because in everyone's hearts, they were still concerned about the battle half the world, and that battle was very attractive to the soldiers, so after the visit, Huang Lao's trip was over.

When Huang Lao and his entourage left, the people of Yituo Factory were also unwilling to leave, but Xie Huimin and others had no intention of leaving.

"Lao Xie, what are you waiting for? Dinner with us? Let's go, go to the canteen, we have a treat in a machine factory. Seeing that Xie Huimin was reluctant to leave, Zhao Guodong quipped.

"Okay, go to your canteen to eat, I heard that your machine factory, the food is quite good now, and the braised pork is available in unlimited quantities." Xie Huimin is unceremonious.

In the past, a machine factory had a special cadre canteen, but now, when Zhao Guodong became the factory director, the leaders' small stoves were canceled, and everyone was in the same canteen, and the taste and quality of the food also came up.

The big guy is working hard to create value for the factory, and he can't let the big guy's stomach be wronged, right? After Zhao Guodong came to power, on the one hand, he introduced a strict system, and on the other hand, he let the workers get tangible benefits in their lives, so it was easy to impress many people.

Of course, the rules and regulations have also been refined, and the phenomenon of a worker serving food and bringing it back to a large family to eat has been curbed, and the public and private are clearly distinguished.

Now, entering the canteen, in fact, it has passed the peak period of dining, there are not many people inside, sitting at the table in the canteen, holding a big flower bowl, everyone eats quickly.

"Lao Zhao, you are eating meat now." Xie Huimin said.

"Yes, we eat meat, and we also eat it by our own ability, and you want to rub our broth to drink? It depends on whether you have the ability, and if you have the ability, that is, the big guys sit down and eat meat together, just like your old Xie, don't you also sit down and eat meat? ”

"This is me alone, our whole factory, everyone, is waiting to eat meat."

Xie Huimin said solemnly, seeing that the first machine factory is about to develop and enter a new stage, they also want to develop again.

"Zhenhua, you give us the Second Machine Factory a way, see if our Second Machine Factory has any way to export some equipment." Xie Huimin looked at Qin Zhenhua again.

"The affairs of your second machine factory, you can do it yourself, if you ask me for ideas, it is not for nothing, I will charge for it." Qin Zhenhua said.

"It's easy to say, it's easy to say, you give us ideas, and we can do as much as we want."

"And what if I'm going to take a 10 percent profit?" Qin Zhenhua asked.

The expression on Xie Huimin's face stiffened in an instant, this Qin Zhenhua is too dark, right?

Looking at his appearance, Zhao Guodong couldn't help but smile: "Haha, Lao Xie, Zhenhua is teasing you." ”

At this time, Xie Huimin reacted, they are all brother factories, as long as there is no competition, how could Qin Zhenhua really come to them for benefits? This is against the principles of the organization.

"Look, this is the landlord's old wealth, this is Huang Shiren." Qin Zhenhua said: "Empty gloves white wolf. ”

"Zhenhua, just say it, we can hire you as the director of the sales department of our second machine factory, you don't need to be resident, just nominate and get a salary." Xie Huimin said.

"Forget about this, in fact, it's very easy for you to make money." Qin Zhenhua said: "At present, what our exporting countries need most is tanks and armored vehicles, you can't produce tanks, but 63 armored vehicles, you should have the technology to make them, right?" ”

"Grab business with the capital factory?" Xie Huimin took a breath of cold air.