Chapter 648: Many Varieties of Bombs

"Hey, Chief Engineer Gao, this is a good suggestion. Confirming the impact point every time is a huge project and the efficiency is extremely low."

“Why didn’t you think of it before?”

"You didn't know about this thing before. Besides, even if you knew, you wouldn't be able to coordinate it."

"Apply as soon as you get back. This will improve efficiency and save a lot of money."

"..."

For scientific research projects, even if no money is saved directly, as long as time is solved, it is hard to imagine how much money can be saved.

However, they might be very happy about this kind of thing under normal circumstances, but compared to what Gao Zhendong was talking about, it was obviously the icing on the cake, so after a short moment of happiness, Fu and Shao immediately shifted their focus back.

If you don't try to get more information now, you may not see him again next time. It's not that they don't want to see him, but judging from the trend, it may not be easy to see him.

"Chief Engineer Gao, what is the suggestion and vision you just mentioned?"

Gao Zhendong nodded: "Oh, yes, I haven't finished yet."

As he spoke, he added something to the bottom of the date-seed bomb.

"I suggest you develop a new standard bullet type, a bottom exhaust extended range bullet."

Base-bleed bullets only appeared in the mid-60s, and they are not available now, so this concept completely stumps the artillery masters, and they really don't know how to use it.

"Bottom exhaust extended-range projectile?" They looked at each other and said in unison, really having no idea what it was.

Gao Zhendong continued to draw the details: "Design a pit at the bottom of the shell and install an exhaust device inside it. The gas will be continuously discharged during the flight of the shell, which can increase the range of the shell."

A comrade who was working on artillery shells laughed out loud: "Wasn't this a rocket shell? If that's the case, we should just make a rocket launcher."

Although Fu and Shao were puzzled, they did not say anything. They did not believe that Chief Engineer Gao could not see such a simple thing.

Gao Zhendong was not angry. They really didn't understand this thing. To a certain extent, their knowledge of the aerodynamics of artillery shells was actually limited.

He smiled and explained, "This is different from a rocket. The principle is different. A rocket is completely propelled by the continuous jet of gunpowder gas from the rocket engine. But where does the power of a barreled artillery come from? I think you should know it very well, right?"

"It comes from the work done by the expansion of the propellant when it explodes."

"Yes, but have you ever thought about what kind of resistance the cannonball will encounter when it is flying in the air?"

"Air resistance!"

"But have you ever thought about the composition of air resistance? What exactly constitutes this air resistance? What influences it?

"Isn't it just..." The comrade who was working on the artillery answered here, and suddenly got stuck. Hey, this thing sounds simple, but he really can't answer it.

It's like everyone knows that eating food can fill you up, but why can eating food fill you up but not eating dirt? Not everyone can explain this clearly.

Seeing Gao Zhendong looking at a group of comrades smiling in silence, President Fu knew that they could not answer this question as it was too detailed.

"Chief Engineer Gao, what problem does this bottom exhaust range extender solve?"

Gao Zhendong drew a few strokes on the tail of the projectile on the picture: "When the shell is moving at high speed, the bottom of the shell will form a low-pressure area because the air cannot be replenished in time. This low-pressure area will increase the pressure difference before and after the shell, and increase the resistance, so..."

President Fu suddenly came to his senses: "Ah, I understand! This exhaust is not to propel the missile forward, but only to fill the low-pressure area at the bottom of the missile with gas and try to balance the pressure difference between the front and rear of the missile?"

President Shao also understood: "Yes, yes, this idea is great! We still haven't done enough theoretical research. This method looks simple, but it can't be proposed without a deep foundation in aerodynamics and fluid mechanics. And if it is just to supplement the low-pressure area of ​​the projectile, the exhaust device does not need to be too large, and the volume and weight cost are not large, and it will not have much impact on the power of the projectile."

Absolutely, so amazing!
The comrade who just said he had made a rocket, his face turned red, he was so impulsive.

The brains of these big guys are different from those of ordinary people. Their theories and angles of thinking are very different from common sense. It’s not that you can’t refute or question them, and they probably don’t care. But you have to be thick-skinned, otherwise you will easily end up doubting your life.

Mr. Shao is now deeply grateful for his behavior of "taking the class for free". What he said is not only for 122, but also for medium and large caliber shells. Gao Zhendong smiled and said, "But the bottom-bleed shells are not without flaws. As long as the exhaust is exhausted, force will be generated. The shells move forward in the air by rotation and precession. This tiny force will also have a certain impact on the accuracy of the shells. However, overall, this range-extending method is still very cost-effective. I have estimated that if the design is appropriate, it is no problem to increase the range by about 10%, which is comparable to the jujube-core shells."

10%? That’s incredible. There’s still about 10% left of the jujube bomb? I’ve made a profit!
Mr. Shao has already made up his mind. Unlike Mr. Fu, his cannon cannot be changed in a short period of time. Imitation is just imitation, unlike Mr. Fu who makes new cannon.

But the shells can still be modified. Once the jujube-core shells and base-bleed shells are installed, there will be no problem in reaching the 20-kilometer mark!

别看20km和17.4km比起来没多多少，但是经常买东西的人都知道，9块9和10块，10块实在是贵出太多！

As for whether Chief Engineer Gao's two 10% figures are just bragging? That's impossible. How could he say such figures if he wasn't sure?

As for Mr. Shao, there is no need to say more. Gao Zhendong used this combo on the new cannon. Hehe, Old Shao, I wonder how you can show off your large caliber in front of me every day!

But it seems that Lao Shao's modification of the guitar can also produce very good results. Forget it, let him have a go.

The two were daydreaming in their minds, but Gao Zhendong didn't stop.

"As for the prospect I mentioned, it is aimed at the small flaw of this bottom-bleed bullet."

Can the defects of bottom-bleed bullets be solved? The two of them didn't have time to imagine the future, and they just had to focus on the present.

"Can the defects of base-bleed bullets be solved? Then why not go directly to the final solution?" A comrade was puzzled.

As for the two artillery masters Fu and Shao, they could not ask this question, not because they could not think of it, but because they thought about it more.

Why? It must be that the cost of solving this defect is relatively high. Compared with the current bottom-ejection technology, the cost of other technologies is not worth it.

As expected, Gao Zhendong smiled and said, "Well, the final solution also has its own price. Under the current circumstances, base-bleed ammunition is the best solution. If base-bleed ammunition has to have a flaw, it will have a slight impact on accuracy, but the range extension effect is not the best. Solving these two problems will be fine."

In fact, to put it the other way around, base-discharge ammunition is a solution that combines extended range, accuracy and cost better. This is the charm of looking at problems dialectically. It depends on what angle you look at it from and how you interpret it.

Dongjing Huaxia, a very good name for self-media.

What’s happening in China, uh… never mind.

“That’s why it’s called Outlook. We’ll give you the path first. As for how to choose, you can choose based on actual needs. In other words, when resources are sufficient, you can take them all, haha.” Gao Zhendong summarized Outlook.

"Yes, yes, Chief Engineer Gao's words make sense. Then how do we solve these two problems?" Yes, yes, yes, you are right. Then you should hurry up and look forward to it. You are getting impatient.

Gao Zhendong drew another diagram on the blackboard, which was much simpler than the base-bleed projectile: "One is to make a base-concave projectile, that is, to use the concave bottom of the projectile body and the aerodynamic structure design to retain or ensure rapid air replenishment and reduce the pressure difference. The advantage of this method is that the accuracy is better, but the disadvantage is that the design is more difficult than the base-bleed projectile, and the requirements for aerodynamics or fluid mechanics are relatively high. The range extension effect is likely to be inferior to that of the base-bleed projectile."

The reason why we don't take out the base concave bomb, which seems to be a simple and convenient design, first is the trouble. The base concave bomb is passively replenished with air, unlike the base-exhaust bomb whose gas source is in one's own hands. Therefore, the requirements for fluid mechanics are much higher. It is a typical case of simple results but difficult process.

"This thing looks simpler than a base-bleed bomb!" A researcher from Unit 152 was delighted. This thing is easy to make, so why not just make this?

Mr. Shao looked at him and said, "Haha, you think it's too simple. This thing is much more difficult than the bottom row!"

He and Mr. Fu completely understood what Gao Zhendong meant. This thing could be used as a prospect, but if you wanted to start it right away, it was indeed not as good as the bottom row.

This made them admire Gao Zhendong very much. Not to mention so many new technologies, he could accurately grasp what was the most suitable and what technology looked easy but was actually not suitable to use right away.

This requires not only profound theoretical knowledge, but also extensive practical experience and a thorough understanding of the environment.

Look at Gao Zhendong’s age again, haha... forget it, some people exist to break the rules.

"As for the insufficient range extension, haha, a comrade just said it well. It is indeed possible to consider making a rocket-extended-range projectile. The range extension effect is good, but it has a greater impact on the power of the projectile. It may not be suitable as a main type of projectile, but it is still a good choice for specialized projectiles." Gao Zhendong made up for the comrade who first questioned the base-fired projectile. The comrade's consideration did make sense.

Fu and Shao were both delighted. Chief Engineer Gao's suggestions and prospects basically solved the problem of projectiles. On the basis of comprehensively surpassing the original ordinary bullets, various types of bullets should be comprehensive, with different ranges and high accuracy.

If every meeting was like this, they would wish they could stay in the Defense Work Committee all day long.

(End of this chapter)