Chapter 686: Easy to use, but flawed
Gao Zhendong is not prepared to put forward any opinions on this artifact. At most, he can only try to help improve the range without changing the size. Otherwise, he doesn’t think about anything else. I don't dare to say it.
This thing is so good, what are you trying to do with it?
The comrades in the Land Decoration Bureau looked satisfied. Let’s not talk about 130. At least 107 can be modified to work part-time at 130.
Thinking about this matter again, the comrades of the Land Installation Bureau felt that it was outrageous. This matter highlighted a problem - this 130 fire is really not a big move.
At the same time, Gao Zhendong's words made the comrades at Fenglei Factory twitch in their faces. They understood that the first problem with the rocket may lie in the rocket engine.
I haven’t seen the design of the 107, so I can’t even guarantee 30%. However, my own 130 has directly improved by 50%, and it looks very confident.
It seems that the Land Equipment Bureau is quite dissatisfied with the range, not just because the target is set low, but because there is indeed something wrong with their own stuff.
"Chief Engineer Gao, can this really increase the range by 50% without greatly modifying the missile body?"
The comrades in Fenglei Factory can't take care of that much anymore, it's more important to learn something.
In fact, rockets are a weapon that we started relatively early, but that’s just because we started early. Even this 130-fire weapon was developed in their factory for a long time, and it has never been able to meet the minimum technical and tactical requirements. Under the circumstances, the country introduced some advanced rocket prototypes and projectiles from Lao Maozi.
Basically, the entire system is mainly based on borrowing. In this case, there are many things that are borrowed from, but why it is done in this way is not known at all.
So many things don’t make sense to them. Not to mention that the 130 fire has not been completed yet, and they feel even more confused.
Gao Zhendong smiled: "If the range is longer, it's really hard to say. The range is far. I have analyzed that the situation will be very complicated. A simple inaccurate shot includes many situations. , such as bullet drop, fan-out, ballistic crossing, large cumulative error, The random accuracy error is large, etc. But this is only about ten kilometers, and the situation is not that complicated. There are not many additional things to consider when increasing it to 15 kilometers. "
To be honest, for Gao Zhendong. , the comrades of Fenglei Factory themselves were confused.
Except for the problem of large random accuracy errors, none of the comrades in Fenglei Factory have encountered it before. This makes them even more ashamed. This thing is so low-tech that even the difficulties encountered are classified into three, six or nine.
I am not even qualified to encounter advanced difficulties, so where can I find excuses for them?
Even some of the possible problems raised by others have not even been heard of, let alone encountered.
This gave them the idea for the first time, "Does Chief Engineer Gao feel unsatisfied?"
"Chief Engineer Gao, we have encountered the problem of insufficient random accuracy before. The analysis is that the height machine and the steering machine have large displacements and cannot be locked. Later, we solved it by copying similar parts of existing rocket launcher samples in the north. .”
Gao Zhendong didn't know about this and was a little speechless when he heard this. This situation was really unbelievable.
Fortunately, this basic problem has finally been solved. Once solved, you will gain experience. If you encounter a similar situation again, it will not become a big problem.
Gao Zhendong didn't express any opinions first. Let's look at the Land Loading Bureau's requirements for the range.
“Let’s put it this way, a 15-kilometer range can be achieved without major changes to the guns and shells. Above 20 kilometers, major changes are necessary, and there are many changes. Which range you want is up to you. For a moment.”
After listening to Gao Zhendong’s summary, the Land Loading Bureau fell into troubles of happiness, and Fenglei Factory’s feelings were difficult to describe.
Are you happy? Happy! After all, we can still be picky about problems that we have tried our best to solve.
Is it embarrassing? Awkward! Same reason as above.
"General Engineer Gao, we have also tried to increase the range of the rocket, but it is difficult to achieve even 15 kilometers. To increase the range, we need to lengthen the rocket, and the accuracy of the rocket will be poor if the length is lengthened, but the reason We haven’t found it yet. There is no problem with the missile’s spin or anything else, but the accuracy is poor.”
Gao Zhendong said with a smile. : "You don't have to worry. First of all, as I said just now, I don't need to modify the missile body for 15 kilometers. Secondly, I have the technology and confidence to guarantee the accuracy after modifying the missile body."
"With the same The caliber tail is stable? The accuracy is also very poor. "The comrades of Fenglei Factory actually thought of many ways, but none of them succeeded.
Gao Zhendong shook his head: "The tail fins of the same caliber will not work. There will be very serious turbulence at the tail at supersonic speeds, and the accuracy will certainly not be better. That thing is fine for use on low-speed rockets, but forget it at high speeds."
The comrades in Fenglei Factory didn't even have time to say anything else, and all of them were immersed in writing.
What are you doing standing still? Remember!
They knew the phenomenon, but they didn’t know the cause. They didn’t expect that people would know it without looking at the test materials and processes.
These days, we basically have nothing about the theory of rockets. Any bit of theoretical knowledge is very valuable to comrades. This little bit of theory can enable them to design different rockets. Take less detours when playing.
Don't underestimate this little bit, this bit of detour, that bit of detour, eventually it becomes a mountain road with eighteen bends.
At this time, the comrades of the Land Loading Bureau simply made an adult decision.
——I want them all!
He can't decide this matter hastily here. Simply, since this great god won't run away here, please tell him everything.
"Chief Engineer Gao, please tell the comrades of Fenglei Factory both options about the specific range. We will go back and organize personnel to demonstrate, do you think it is okay?"
The comrades at Fenglei Factory were a little surprised when they heard this. Is this a bit greedy?
Unexpectedly, Gao Zhendong nodded immediately: "Well, this is a good idea." After saying that, he turned around and started writing and drawing on the blackboard.
“If it is only 15 kilometers, the first thing is to change the propellant.”
Seeing that several people were frowning, Gao Zhendong smiled, He knew what they were worried about.
"Don't worry, I know what rockets are for. It's cheap and large. It's not the same as missiles. But the propellant I give you is not very expensive. It's a composite propellant. It's also a double-base propellant with slightly different ingredients. , the price is about the same."
Including the comrades of the National Defense Work Committee, they were relieved. Rockets are already more expensive than artillery shells, and they use a lot of propellant. If Gao Zhendong suggested that one be ridiculously expensive. propellant, it would be great fun.
"Is there such a propellant? How come we didn't know about it." This question is a bit incompetent, but it is understandable. It is normal for people to be a little overwhelmed when they are surprised.
"After the first few meetings, I had a premonition that the rocket launcher would move, and I specially prepared it for you. I have seen the performance of your current propellants, and they are quite different." They are all double-base propellants. , but there is still a difference.
There is a certain difference between the propellants of rockets and missiles. Gao Zhendong found one that is more suitable for rockets at this stage. It is better than propellant and not too expensive.
After speaking, Gao Zhendong took out a piece of material from his bag and handed it to the comrades in Fenglei Factory.
“Take a look, this is the performance of this propellant. I asked comrades from a certain factory to test it, so there is no need to worry about the authenticity of the data.”
The comrades from Fenglei Factory took a look, My eyes straightened.
"Specific impulse 2500N.s/Kg?! How did you get it?"
Gao Zhendong looked confused: "That's how it was matched."
How can I explain this clearly?
The comrades of the National Defense Work Committee and the Land Loading Bureau looked at a loss. They were not familiar with contrast: "Comrade, what is the importance of this data?"
The comrade of Fenglei Factory said: "The best double-based propellant we have now has a specific impulse of 2050N.s/kg... The specific impulse is directly related to the projection weight or range."
I understand this time, comrades on both sides I did the math and opened my eyes wide.
"Chief Engineer Gao, this thing can increase the range by more than 20%!!!"
Gao Zhendong smiled and said: "That's not the calculation. It's even higher. Considering the density of this thing, it's about 12% higher than the ordinary double-base propellant used by comrades at Fenglei Factory. Taken together, theoretically it can at least improve Almost 30%.”
The relationship between specific impulse and range is not a direct linear relationship, and the calculation is slightly complicated due to factors such as propellant density.
Fuck, more than 20%! Comrades from the National Defense Work Committee and Land Loading Bureau were no longer calm.
Such a big step forward has made comrades’ worries resurface again.
"General Engineer Gao, is this thing expensive?" Between performance and cost, you get what you pay for, two cents for two cents, and three cents for three cents. Everyone still agrees. I understand, if it is not expensive, how can it afford this performance?
Gao Zhendong thought for a while: "It's a little more expensive, but not that much. It just adds some Al and AP. At least it's not as much as the cost of using the original ammunition to directly support the 30% increase in range."
The range is improved, Without considering other indicators, the simplest thing is to add medicine.
What Gao Zhendong means is that the range is also increased by 30%. If the propellant is not changed and the original propellant is used, it will cost more than this new propellant!
Is it cheaper to co-author? The comrades of the National Defense Working Committee and the Land Loading Bureau are very happy.
The range is long, and the converted cost per unit range is cheaper. Well, today’s KPI is completed, and you can go home.
Just this propellant can make all rocket launcher comrades happy. If you want bicycles, you can't be too greedy.
Looking at their appearance, Gao Zhendong poured cold water on them.
"But this thing is not without flaws."
There is indeed a problem, I hope it is not a big problem, then it will be fine. Several comrades looked at Gao Zhendong nervously.
General Manager Gao, you don’t like this. Before the skin of the sweet dates you gave me could be broken, you were slapped with a big slap.
"This propellant has a relatively large smoke..."
What? Is there a lot of smoke? What kind of flaw is this?
(End of this chapter)