Chapter 683 The main thing is the engine
Because of these words, Gao Zhendong thought for a while. The comrades here were also very patient.
Patience comes from trust, and also from Gao Zhendong’s performance just now.
Solve technical problems on-site, although Gao Zhendong often does this, but not many do this these days.
Although I was choked as soon as my words came out of my mouth, I just want to ask if you scared the National Defense Working Committee.
Gao Zhendong thought for a while before speaking.
“If the problem of the quick reaction capability of liquid missiles has been solved, I suggest that liquid missiles should be the main focus at this stage.”
Gao Zhendong is not because he is more skilled in solid rocket motors Advantages, it is recommended to focus on solid missiles. For us at this stage, liquids have far advantages over solids.
The most direct point is that the specific impulse of liquid hair is much larger than that of fixed hair, and its transportation capacity is greater, which expands its use a lot.
Gao Zhendong’s words confused the missile comrades. No, we have not considered solid recommendation, and we have not thought of comparing the two for the time being.
But what Gao Zhendong said shows that this "mysterious comrade" at least knows a lot about hair fixing liquids, so it's good to hear it.
“Why is it not recommended for the time being to fix hair?” The leader of the National Defense Working Committee asked everyone’s opinion.
Then everyone heard Gao Zhendong laughing on the phone: "To save money."
After saying this, Mr. Cai, who was working on the engine, became a little uneasy again. He had already heard that He heard Gao Zhendong’s voice, but it’s not like Chief Engineer Gao didn’t even know this, right?
He knows best that liquid hair is much more valuable than solid hair. The most exaggerated thing is that the thrust and range are about 10 times more expensive.
He couldn't help but indicate that he wanted to speak, and the leader of the National Defense Work Committee handed him the microphone.
"A high...reliable and high-thrust liquid engine should be much more expensive than a solid-state engine, right?"
Holy shit, shit, it was such a close call, but luckily I got it right.
No one else could hear his sharp turn, but a few people still heard it.
I couldn’t bear it! No laughing!
Other comrades who didn't hear it just secretly praised Mr. Cai for his rigorous words. Others may not be expensive, but those with high reliability and high thrust must be expensive. This is determined by scientific principles.
Gao Zhendong on the other end of the phone heard Mr. Cai’s voice. Mr. Cai was not strange at this venue, but he was a little better than Mr. Cai. He almost lost his temper just now, but now he is very Pay attention to this matter.
“Comrade, this is indeed the case, but this matter must be considered in the context of the environment and development. At this stage, for us, on the whole, liquid hair is cheaper than solid hair, and liquid hair is Some advantages are also very obvious.”
There is a reason why Lao Maozi continued to use liquid intercontinental missiles until the 21st century.
When the other comrades heard this, they were all very strict and strange. "Taken together at this stage," the wording is airtight and it is a matter of fighting from a distance.
On the phone, Gao Zhendong didn't wait for others to ask questions and started to explain directly.
“We all know that aside from the technical difficulty of fixed launch, even if the fixed launch technology is mature, we will still face a problem, that is, each different model of missile or rocket has Different designs are required. It can be said that the solid rocket motors corresponding to each model are different."
When Mr. Cai heard this, he said, yes, what Mr. Gao said made sense.
Liquid hair can be combined into multiples and used on a rocket or missile, but fixed hair basically does not do this.
Gao Zhendong: Not necessarily. For example, Citigroup's Dragon individual anti-tank missiles may be small, but they have a lot of solid engines.
The structure of fixed hair is simple, which also means that the structure is single and there are not many tricks to play with.
Thrust adjustment is troublesome and the use is not flexible enough. This is one of the inherent problems of fixed hair.
Unless the solid-state rocket is externally bundled like a space rocket, connecting multiple engines in parallel in the same cylinder is obviously a long-term task.
Therefore, fixed engines with different cross-sectional areas, lengths, ranges, and uses are equivalent to a new model of engine and need to be redesigned. In this regard, solid hair cannot compare to liquid hair.
Gao Zhendong's voice still came from the phone: "Furthermore, the fixed thrust has a small specific impulse and a large thrust, but the working time is generally short. This means that it is relatively difficult to increase its projection weight. In addition, Problems such as the difficulty in adjusting the real-time fuel consumption mean that Gufa cannot engage in one-time transactions, which will greatly increase our R&D investment and dilute the already weak research strength. "
It is said that Gufa is cheap. , generally speaking of production costs, because liquid hair is much more complicated than solid hair.
If fixed hair is a kicker, then liquid hair is a bit like an open internal combustion engine. Needless to say, the complexity and cost are needless to say.
Listening to Gao Zhendong's talk on the phone, all the comrades at the venue listened with interest. Although I didn't think about fixing my hair at the beginning, the reason was actually not thought about so much and so clear.
Now someone has analyzed it in a down-to-earth manner. It is actually a good learning opportunity for everyone.
"Liquid rocket engines are different. If carefully, rigorously, and scientifically planned, basically at this stage, only one or two types of engines are needed, which can basically cover the range from long range to long-range, intercontinental, and use From surface-to-surface missiles, space rockets, the launch methods range from silo launches, launcher launches to mobile launches, and most of the usage scenarios."
"As long as you solve the problem of rapid reaction to a certain extent, then liquid launch will be possible. In fact, at this stage, It is still a very suitable choice, especially for well injection. As long as the problem of long-term storage of liquid fuel is solved, the difference in quick reaction speed between the two is not very big, because the maintenance conditions of the well injection are excellent. Properly designed equipment and systems can greatly smooth the reaction gap between the two. "
When Mr. Cai heard this, he asked knowingly. Has the problem of rapid reaction been solved to a certain extent? , others may not know, but you have no idea?
Starlight guidance correction + dimethylhydrazine/nitrous tetroxide fuel, one solves the problem of positioning and aiming after launch, and the other solves the problem of temporary fuel filling, but they all came from you.
Other comrades listened very attentively. The comrades present did not think so much about what Gao Zhendong said, but Gao Zhendong said it so clearly that everyone felt that this was really the case.
One or two types of engines are planned, one for the small one, two or three for the larger one, one stage for the short-range one, and two or three stages for the long-range or even further one.
Full combination, one large and one small, or one medium and one small, can cover all the existing uses, whether planned or unexpected, which is very economical in research and development. Funding is also conducive to the maturity of equipment and cost reduction.
"Well, your suggestion is very good. Thank you, comrade consultant, we will fully consider it." The leader of the National Defense Work Committee said on the phone.
Gao Zhendong did not stop talking: "In short, no matter how far the range is, or how many ranges are planned, we must first plan and design the liquid rocket engine in a down-to-earth manner. Everything else is easy to talk about. Guidance and range are not problems. The biggest problem is whether the engine is easy to use. "
I don’t know if Comrade Gao Zhendong heard this, oh, this comrade is so loud, guidance, Is range not an issue? Don't be afraid of the wind blowing your tongue.
But those who knew him knew that what he said was really not a big deal.
If the range can still achieve miracles with great force, then it is very curious how Gao Zhendong can ensure good accuracy at a large range.
These curious people include his senior brother Zhang. Senior brother Zhang knows about starlight guidance and how to use it for correction, but he is still curious about how to ensure accuracy under various circumstances.
Of course, we can’t talk about these things now, let’s talk about them later.
Gao Zhendong thought for a while, but still did not kill the fixed launch with one stroke. He just made a suggestion: "If you must do fixed launch, it is recommended to do it on short-range and long-range missiles or above. Then consider the mid-range.”
This suggestion of a two-ended shuttle confused everyone. Isn't it too strange?
“Why do you suggest this?”
“Because short-range missiles are tactical missiles, and if they want to be truly effective, the output must not be small. In this case, the fixed production cost The advantages are obvious, and as for short-range missiles, the specific impact disadvantage of fixed-fire missiles is easier to cover up. At worst, it is still acceptable if it is made slightly larger."
Gao Zhendong's voice came from the speaker. , a little unclear, but everyone still heard what he meant clearly.
The comrades at the scene all laughed, using their strengths and avoiding their weaknesses. This is indeed a good idea. If you can't do it small, do it bigger. When this comrade can make do, he really just makes do. .
"As for long-range and above, because that thing has a long range, the price of a single missile is naturally high. At this time, the cost advantage of fixed launch can also be brought into play. Moreover, this missile is definitely not small. In this way, the fixed launch ratio is smaller. There is still room for finding ways to solve the disadvantages. It is not easy to build a dojo in a screw shell, but the larger the site, the more ways you can think of.”
This idea was quite strange, and everyone still thought about it for a while. I really didn’t think it through.
But Gao Zhendong’s next sentence on the phone made everyone pay attention.
"And the ability to react quickly is most needed at this range." OK, I understand, this comrade's feelings about Citigroup are so pure, and he can't leave Citigroup behind.
"In short, if there is no spare power, then you can also use a liquid-launch combination to solve the problem at long range and above. If you have spare power, it would be great to have a fixed-launch missile at long range and above. After all, fixed-launch missiles are The maintenance performance is incomparable to liquid hair.”
(End of this chapter)