Chapter 332 Big eyes and small eyes
While thanking Gao Zhendong for the new material, Professor Luo laughed and complained about Professor Liu: "Haha, this old Liu doesn't share good things when he gets them, and he actually lays an ambush. "
Gao Zhendong couldn't answer the conversation, and the two of them were chatting.
Professor Luo had a clear direction on rifle grenades, so he turned over this article first and talked about rifle grenades.
"Director Gao, the idea of a grenade hanging on a gun that you talked about with Professor Liu last time has now been officially launched as a sub-project. It just so happens that this matter is also entrusted to me. So in this regard , there are many things I need to ask you for advice.”
Gao Zhendong felt happy when he heard this. Not to mention, they moved really fast.
“Don’t hesitate to ask for advice, let’s discuss it.”
Professor Luo’s next words made him a little embarrassed: “I preliminarily simulated a 35mm high-speed grenade. The situation has been calculated. The results have some good points and some unsatisfactory points. The good points are that the tactical indicators are very good, it can effectively replace the role of 40~50mm rifle grenades, and the ballistics, service, ammunition carrying capacity, reaction speed, etc. "But..."
As soon as "but" came out, Gao Zhendong knew that something was coming, and maybe there was something ill-considered in his suggestion.
“But the recoil is so strong that the personnel can barely withstand it, but the gun may not be able to withstand it. It requires special considerations and reinforcements, plus the launcher of the high-speed grenade itself. The weight of the entire system is a bit excessive due to the wall thickness and the need for greatly strengthened connectors. If it is used for a special launcher, it is easy to solve, but it is a bit difficult to hang it under the gun.”
This is a question. Can people bear it? Gao Zhendong has considered it. Although the back seat of the light sniper grenade he saw in his previous life is large, judging from the live ammunition design, people can still withstand it. Since it can be installed in large numbers, it means that Not without reason.
However, he put aside the impact this would have on the entire system.
Professor Luo's next words completely put an end to his idea of using high-speed grenades: "I have also communicated with the comrades on the user side. They are very interested in your idea, but they also proposed An idea, while direct fire, also wants to have indirect fire power. The range does not need to be too far, but it must be there. "
Typical Party A, wants both.
That would be easier. You don’t have to worry about the balance between speed and recoil. If you just want direct firepower, you can still choose between projectile weight, muzzle velocity, trajectory, and recoil. Find a suitable balance point.
As for this direct shot, the range does not need to be too far, so Gao Zhendong does not have to adjust his calculations to find a balance point. In this matter, it is not good to be too fast.
Then let’s go with plan B.
Gao Zhendong smiled smoothly and said: "That's easy to do, you can use the principle of high and low voltage launch."
Then he raised his head and looked at Professor Luo, only to find that Professor Luo was also looking at He didn't speak.
The two of them looked at me and I looked at you, staring at each other for a while. Gao Zhendong said inexplicably: "Professor Luo, is there any problem?"
Professor Luo looked at him inexplicably: "Director Gao, no problem, just keep talking."
Gao Zhendong spread his hands: "No, just use high and low pressure."
< br>Professor Luo stretched his neck: "Then you have to tell me what the principle of high and low voltage launch is."
Gao Zhendong: "You don't know the principle of high and low voltage launch?"
Professor Luo: "How do I know the principle of high and low voltage emission?"
Only then did Gao Zhendong realize, damn it, I was too careless. People who are doing this these days don't know what the principle of high and low voltage launch is. It's not that they can't do it, but they don't have the concept at all.
That’s right when you think about it. Considering our emphasis on firepower, it was not until 1991 that the first gun-mounted grenade with high and low pressure firing principles was launched. As you can imagine.
Gao Zhendong patted his head: "It's my fault, haha."
Professor Luo looked at him as if he really didn't expect that he didn't know the principle of high and low voltage. It seemed that Director Gao You are overestimating us. This thing seems to be a bit embarrassing?
The other person originally communicated with me on an equal footing and felt that I was on the same level as him. However, I never expected that my level was too bad and I couldn't keep up with the other person's rhythm and pace.
Professor Luo took the initiative to feel ashamed: "I'm sorry, Director Gao, I really don't know what the principle of high and low voltage launch is, and I asked Director Gao to give me more advice."
Gao Zhendong smiled: "Little devil Professor Luo remembers the grenade? While the range is guaranteed, the launching mechanism is relatively simple and lightweight."
In Professor Luo's expression of sudden realization, Gao Zhendong still explained the principle of high and low pressure launching. After all, Professor Luo may know the phenomenon of the little devil's grenade, but he may not be able to understand the principle.
High and low pressure launches are simple to say, that is, confining the propellant in a small closed space, and after igniting it, the gunpowder gas is slowly sprayed out through a small hole to push the projectile forward.
For example, if a balloon explodes at once, the movement will be relatively loud and the shock will be felt. However, if the balloon is slowly deflated through the inflation port, the same amount of gas will be much calmer.
This technology uses high-pressure gas to do the work, but there is a low-pressure process to push the projectile, so it is called high-low pressure launch. It can effectively smooth the peak of the chamber pressure, disperse the energy and release it over a longer period of time, reducing the chamber pressure. , the requirements for the launch mechanism are much lower. In the previous life, our high-pressure grenade launchers not only had thick tubes, but also had reinforced ribs. The reason was that the high-pressure grenade had a high chamber pressure.
At the same time, due to the long power time of high and low voltage launches, the power efficiency is relatively higher and less propellant is required.
As for the rear seat, high and low pressure launches can basically not be reduced. Students who have studied momentum know that it mainly depends on the muzzle velocity of the projectile. However, since the muzzle velocity has been reduced due to the curved shot, the original rear seat The seats are naturally smaller.
If you want to have no recoil, that's easy. Just eject material backwards like a recoilless gun. This is referred to as the principle of balanced ejection.
Of course, they both throw matter backwards, but recoilless rifles and rocket launchers are different. This is a long way to go.
After hearing this, Professor Luo confessed with a look of shame on his face: "Director Gao, to be honest, I have used a lot of Japanese grenades, and I never expected to come up with such a set of principles. "
When talking about the scientific research work during this period or even twenty or thirty years later, a common saying is "theoretical foundation is lacking and technical strength is weak", which is an out-and-out truth.
Gao Zhendong didn’t say anything. He couldn’t answer the question no matter how he said it.
He just smiled and said: "Professor Luo, in this way, you only need to make the place where the propellant is installed thicker and design the gas channel. In terms of the design of the ammunition, you can consider Choose with or without shells. ”
Hey, Director Gao is such a talented person, does he still have a choice?
Professor Luo looked curious: "Director Gao, please tell me."
"Without a cartridge case, because there is no need to remove the cartridge case, it can be designed as a front-loaded cartridge to reduce tactical movements. Increase the rate of fire. The disadvantage is that the length of the launch tube must be shortened in the front-loading method. In this case, the thickness of the launch tube will be thicker, because the energy is relatively concentrated and the chamber pressure will be higher. Just think about it the other way around.”
To put it bluntly, from the perspective of the launcher, it is the difference between the Damao GP-25 and the Citigroup M-203.
Professor Luo thought for a long time, but couldn't decide, so he simply gave up. I recorded both of them and let the user choose.
Hearing his thoughts, Gao Zhendong smiled. He could guess which one the user would choose without even using his brain - the one with the strongest firepower.
I drew a picture of the structure of the two projectiles for him. Professor Luo held it and couldn't put it down.
Professor Luo returned from Gao Zhendong in the morning, found the user representative in the afternoon, and showed Gao Zhendong's two designs of gun-mounted grenades to the user representative.
The user representative looked at it with a sense of happiness beyond words.
"Professor Luo, this design you came up with is so good. I didn't expect that you had already completed the principle design as soon as we asked for it."
Comrade Lao Luo quickly clarified: "No, comrade, the principle design was not done by me. I consulted comrades from other units and he did it. I can't think of this thing."
It's not my own. Credit should not be given randomly. You should explain it clearly, otherwise it will look ugly if it reaches other people's ears.
But the user representative looked like he suddenly understood: "Oh, him, I understand, I understand, no matter who it is, this thing is really good."
Can it not Well, it can shoot both directly and in a curve, it can hit light armor and anti-infantry, its range and accuracy are far better than grenades. If it meets the enemy's machine gun firepower point, it will have strike firepower that can be used at any time.
When the time comes, each squad will carry two, and then the entire squad will be asked to spread out the ammunition, so that the enemy can have enough to eat. From the user's point of view, the one that can explode is a good guy.
In the past, there had never been such a rich war.
Look at the indicators again, surprise!
“Don’t we only require a range of 200 meters, is this?”
“Comrade, that’s it, over there, we calculated on the spot that with this design, the anti-infantry 400 Meters, the anti-armor range of 100 meters is no problem.”
The anti-armor range is shorter, because anti-infantry hits a large area, and anti-armor hits a point that may move. arrived, but couldn't hit it.
The indicators of equipment are never just based on a single value. It is a matter of comprehensive consideration. Just like the effective range of a pistol does not exceed 50 meters, it is because of the word "effective" that it cannot hit. No matter how far it is hit, it will be useless. effect.
The user representative felt even more happy: "I want this, I want this, hurry up and do it."
Professor Luo pointed to the last two pages: "Comrade, The comrade over there provided two projectile designs. It’s hard for me to decide here. I have to ask you to clarify it here.”
The user representative scanned it, pointed to the picture of the front loading plan, and said firmly. : "I want this!"
Professor Luo looked at it and remembered Director Gao's words when leaving, and secretly sighed that Director Gao knew them too well. This choice, this action, and what he said same.
(End of this chapter)