Chapter 297: Chemistry
But the liquid hair that Mr. Cai and his friends are working on now must be filled before launch, and cannot be pre-filled and then stored for a long time.
The reason is simple. Their missiles use low-temperature oxidizer: liquid oxygen.
This thing has a normal pressure boiling point of -183°C, so it is destined to never be stored in a missile for a long time. Let’s not talk about whether it can be done technically or not. The dead weight of the extra liquid oxygen long-term storage equipment is Intolerable.
Even if the pressure is increased to 50Mpa, the boiling point is as low as -118°C, which is still unacceptable, let alone what the heck a 50Mpa pressure vessel is.
Therefore, the preparation time for missiles that use liquid oxygen as the oxidizer is measured in hours. In this case, the little time for Zhuyuan to set up is not a problem.
When Gao Zhendong heard what Mr. Cai said, he hesitated to speak. He was wondering whether he should say anything about "poisonous hair".
Mr. Cai was very perceptive. Seeing Gao Zhendong's expression, he looked serious: "Director Gao, do you have anything to say? Just say, it doesn't matter. We have obtained enough permissions. Today we can Let’s talk openly.”
He thought that Gao Zhendong was worried about the confidentiality issue, but what he didn’t expect was that Gao Zhendong was not worried about this at all.
Gao Zhendong turned around in his head a few times and finally figured it out.
Whether it is poisonous or not is not important at this stage. What is important is that there must be something that can quickly counterattack the enemy under the premise that the range and other indicators are met. Without this, everything is in vain.
And things like dimethylhydrazine or mixed hydrazine can still be used safely as long as they are properly managed, protective measures are taken, and safety construction is complete.
Whether it is Lao Maozi or Citigroup, they have used this thing extensively at this stage, which shows that this thing is irreplaceable in the current technical environment, that is, its advantages are so obvious that even if you pay The cost of management and protection must also be used.
The most famous one of Lao Maozi should be RS-20/R-36M/SS-18. This product has long been a symbol of the Great Ivan. It has a long range and great power. Even the red color has been used for a long time. The Ocean Convention Organization, which gave its camp equipment disgusting names, gave this thing a name that was a bit disgusting but also filled with fear, like "Satan".
Of course, the old problem of Lao Maozi is still there. The development of their technology actually has certain flaws, so submarine-launched things like R-29RM/RSM-54/SS-N-23 are still used. Liquid hair, huge body, and finally transformed into a super freak like a "Shark" class ballistic missile nuclear submarine.
The shark mentioned here is not the 971 attack nuclear submarine, but the 941 ballistic missile nuclear submarine. According to Lao Maozi, the real name of 941 is Акула (shark), not "Typhoon". On the contrary, the "shark" of 971 was named by the Ocean Convention Organization. In its hometown, its real name is "pike/barracuda".
Done! The important thing is to do a good job in protection and management, and implement relevant work in a practical manner.
Instead of being like Citigroup, stuffing depleted uranium bombs under the buttocks of the "Warthog" pilots and behind the tank crews without any targeted protection and lying about safety.
As for Citigroup’s keenness to use this gadget, in addition to its good performance and self-sharpening properties, there is a less important reason - it does not contain much tungsten, and its reserves rank No. 1 in the world. The second half is about 10%, and Citigroup can't make it into the top 5. As for the output, the disparity is even greater.
"Mr. Cai, I accidentally discovered a combination of fuel and oxidizer. I have calculated that the specific impulse and thrust are pretty good. Moreover, at normal temperature, the fuel and oxidizer are both liquid. Their properties are It’s fairly stable and relatively easy to store. The only big problem is.”
After listening to Gao Zhendong's words, Mr. Cai's heart beat violently and he put aside all the "big problems". The specific impulse and thrust were both good, and it could be stored in liquid form at room temperature. Isn't this the innate liquid missile fuel holy body?
As for why it is not a liquid rocket fuel holy body? Because at this time, most rockets do not have quick reaction requirements.
As long as it can be stored at room temperature, its properties are relatively stable, and its thrust and impulse are up to standard, then the rest is not a big problem. Even if this thing is highly corrosive, it is okay to pay a little price for isolation and regular testing. On-bomb storage of fuel can be achieved to a certain extent.
"What is the compatibility? Say it quickly!"
Seeing that Mr. Cai was not interested in the shortcomings for the time being, Gao Zhendong had to talk about the compatibility first: "Hydrazine and dinitrogen tetroxide!"< br>
He didn't say "hydrazine", a slightly professional term, and he didn't even know if there was such a name in China now. To make it easier for Mr. Cai to understand, he was talking about hydrazine, a name related to common ammonia, which was still on the paper. Write down the name.
He didn't even say the final answer of "metahydrazine". The main reason is that in terms of the current technical environment, mandimethylhydrazine is really a partial answer. If hydrazine can still be imagined out of thin air, As for 1,1-dimethylhydrazine (unidimethylhydrazine), it is not something that non-chemistry majors can imagine out of thin air.
It’s funny to say that nitrogen itself is very lazy. It’s almost close to an inert gas. It doesn’t get along well with most elements under normal conditions and doesn’t react.
But the chemical bonds of nitrogen are extremely violent, such as common ammonium nitrate, not to mention conventional energetic materials. Except for metallic hydrogen, which is slightly science fiction, the most powerful one known so far is "Total nitrogen anion".
However, Mr. Cai still doesn’t understand this thing. After all, this thing was originally developed in China eight years later. Mr. Cai is engaged in engines, not chemistry.
"What is this? How did you discover it?" Mr. Cai opened his mouth and asked, "Study, not shabby."
Gao Zhendong had no choice but to explain: "This is a strong reducing agent with the structural formula NH2-NH2. It will spontaneously ignite when it comes into contact with a strong oxidizing agent. I discovered it by accident. I was working on the industrialization of urea some time ago. We produce special steel materials, so we did a lot of research on ammonia substances. In the process, we accidentally discovered the characteristics of this thing." Gao Zhendong was writing and talking, and he casually used the matter of urea steel as an excuse to talk nonsense. , ammonia, hydrazine, we are a family, nothing is wrong.
I was working on special steel related to ammonia, and I also figured out hydrazine by the way. This makes sense.
Anyway, as long as this thing seems reasonable, don’t ask, you’re a genius if you ask!
When Mr. Cai and Mr. Zhang heard this, they forgot about the fuel issue: "What? You made the urea steel too?"
Gao Zhendong nodded: "Well, yes, our Seventeenth Machinery Department is I'm working on materials."
The tone and demeanor seemed to be a normal thing, as natural as eating and drinking.
The two bosses suddenly felt a little itchy at the root of their teeth and a little stressed. Could it be that when they walked out of this door today, they had to report to the relevant departments first and then sign a confidentiality agreement?
The comrade in front of me cannot be said to be a talent, he is simply a genius.
Mr. Cai reacted and was even more excited by the information Gao Zhendong just said: "You mean this thing will spontaneously ignite when it encounters a strong oxidant?"
Gao Zhendong nodded: "Yes, this material property That’s it.”
Mr. Cai was happy: “This is simply natural rocket fuel, even the ignition device is saved.”
Don’t underestimate the ignition device, it also costs money. Mental design also increases the complexity and weight of the system.
An interesting fact that doesn’t sound so grand is that rockets really use torches to ignite fire. For example, Lao Maozi’s Alliance rocket has 32 nozzles, including 32 electric wooden torches. First use electricity to light the torch, and then spray fuel to ignite it. This is the combination of earth and ocean.
When he was happy, he remembered that Gao Zhendong said there was a big problem with this thing: "You said there is a problem with this fuel, what is it?"
Gao Zhendong smiled bitterly: "This thing is highly poisonous!"
When Mr. Cai heard this, hey, what a big deal, isn’t it poisonous? The liquid oxygen will freeze people to death when sprayed out. Kerosene is flammable, alcohol is flammable, and people can easily drink it to death.
"Well, haha, in our industry, there are only a few things that are not dangerous, and we can always prevent them, right? Keep up with management and safety, and standardize operating procedures. This is not unacceptable."< br>
Gao Zhendong said: "Protection is not difficult, but it may be a little uncomfortable for people in protective clothing."
That is to say, the permeability of this thing is average. If it were replaced by dimethylmercury, the protection would be a big trouble.
However, the airtight protective clothing also requires refilling and other operations. If it is said that it is not uncomfortable, it must be false.
"It's okay, but I should be able to overcome it. It's easier than comrades who stay in the tank all the time."
Tanks these days don't have air conditioning. Staying inside That temperature, coupled with the constant vibration and noise, was not an ordinary discomfort.
Gao Zhendong agreed, and at the same time led the topic in another direction: "By the way, I have done a theoretical analysis. If some of the hydrogen atoms of hydrazine are replaced with methyl groups, it should be possible in some cases. Further improvements in performance, such as 1,1-dimethylhydrazine, should be good.”
Gao Zhendong was talking while drawing the structure of metadimethylhydrazine. Although I can't directly talk about metadimethylhydrazine, I can use the name of theory to draw out this thing. I'm so clever!
Dimethylhydrazine has more advantages than hydrazine. Among other things, the boiling point under normal conditions is 63°C compared to 37°C. This is a big difference. What Lao Maozi uses is basically undimethylhydrazine. The hydrazine 50 used by Citigroup is at least a mixture of two things.
Gao Zhendong added: "But my chemistry is just average. I can only say that I have this direction and idea, but I don't understand how to synthesize these things specifically. I can only work hard on chemical engineering." I'm gay."
What do you mean? You are refreshing my understanding of this word.
Mr. Cai is already a little numb to his operations. Whatever you say is what it is. Today, I have these pieces of paper in my hand, not even a fiber on them, I can't let them wander outside!
"Director Gao, why are you so broad-minded in your thinking? You are wronged even if you say that you are drawing inferences from one instance to other cases."
Gao Zhendong smiled casually: "I just study chemistry."
(End of this chapter)