Chapter 565 Everything is ready, all we need is the east wind (Part 2)
"????"
Inside the warehouse.
I heard the number [15,000 meters] coming out of Mr. Wang’s mouth.
Xu Yun was stunned for a moment, and a look of confusion appeared in his eyes.
What's going on?
To know.
According to Xu Yun and Qian Wushi's previous derivation.
In order for the 'Zhu Xian Sword' missile to have enough speed to form a waverider or quasi-shock wave, its fall height was about 8,000 meters higher than Xu Yun originally imagined.
When Master Qian heard this number, he changed it to "10,000 meters" and "9,500 meters is fine".
As a result, it was Mr. Wang's turn now.
Instead of lowering the requirement, he actually raised it to 15,000 meters?
But think about it carefully
It seems quite normal.
After all, the four words "redundancy" can be regarded as the basic personality of rabbits in later generations
For example, the famous Moon Rabbit 2.
The public design life of this thing was 3 months, and its international evaluation at that time was quite satisfactory.
However, from January 3, 2019 to now.
This thing has been on the moon
Four whole years.
In addition, it has actually been running for more than 730 days, has traveled nearly 1,500 meters in total, and has released more than 940.1GB of scientific data at all levels to the outside world.
Probably no one except the design team knows how long the rabbits have preset for its working life.
etc!
Thinking of Yue Rabbit 2, Xu Yun suddenly realized another thing:
The founder of China's aerospace industry is Mr. Wang in front of him.
in other words.
Could it be that this was the source of all evil that the Rabbits later created with redundancy in the aerospace field?
Hiss. It seems like I discovered something extraordinary.
at the same time.
On the long table in front of Mr. Wang.
Hearing what Mr. Wang said.
Except for a few people such as Zheng Tao and Zhou Shaoping who were prepared in advance, almost all the other members were stunned.
But after coming back to his senses.
Everyone did not make too much fuss, but adjusted their sitting postures one after another, as if they were listening to Mr. Wang's request.
After all
It's not that the parameters they calculated are wrong. Or it's not a problem with their ability.
What these young people fear is not that the derivation will be repeated again, but that the mistakes of their own group will drag down the collective.
After a while.
Zheng Tao, who has always shown a strong leadership style, glanced at his companions, found that no one was speaking, and took the initiative to express his attitude:
"Director Wang, if there is anything you need to improve, just say it directly. As long as it is not a problem with our Immortal Sword Killing Team, we can make any changes!"
Hear this.
Mr. Wang looked around again, and nodded slightly after meeting everyone's firm gazes:
"Very good. Since everyone has this awareness, let's talk about business."
So Mr. Wang pulled the movable blackboard beside him, picked up the chalk, and said:
"Our original calculation of the height of the airship was 30,000 to 31,000 meters above the ground, but now it has increased to 15,000 meters, so the staying height will be 45,000 to 46,000 meters."
"In this case, the first thing we need to calculate is the lift of the airship."
"To put it bluntly, the buoyancy force needs to be recalculated."
Students who were airships in their previous lives should all know this.
Although some airships are equipped with a power system, this system mainly provides power for horizontal movement.
As for the power of the airship to rise, it mainly relies on buoyancy.
Generally speaking.
There is more than one airbag in the airship. The outer airbag is filled with helium or hydrogen, and the inner airbag is air. The volume is controlled by a blower.
The inner air bag is filled with air and its volume increases, while the volume of helium in the outer air bag decreases and its buoyancy decreases;
The inner air bag extracts air and its volume decreases. The volume of helium in the outer air bag increases and its buoyancy increases.
And in the actual process.
This gas exchange will be affected by the air temperature, so the design is relatively complicated.
Of course.
The complexity here is mainly for stupid, ahem, laymen.
For aerospace professionals like Wang Lao and others, this kind of gas optimization is not difficult.
So it's quick.
A boy with a shiny head and a top-notch figure raised his hand:
"Teacher, I have an idea."
Mr. Wang nodded towards him:
"Yuncheng, tell me."
The bald boy named Yuncheng stood up immediately after hearing this, walked to Mr. Wang in a few steps, picked up the chalk and started writing:
"Teacher, dear students, everyone should know that the safety range of the pressure difference between the inside and outside of the boat is very limited."
"According to our previous calculations, the pressure difference between the inside and outside of the airship must be maintained between 250Pa and 550Pa, and the maximum allowed fluctuation is only 300Pa."
"Based on this basis, if we want to increase the lift of the airship, it can obviously only be done through the inner ring exhaust"
Said.
The boy wrote several equations on the blackboard:
α=1ρa(h)/ρ(h)
M=ρ(h)V(1α)
α in the first equation is the air density rate, ρ(h) is the atmospheric density, ρa(h) is the atmospheric pressure
M in the second equation is the mass of the airship, which means this is a mass equation.
Then Yuncheng continued to write a few more equations.
ρ(h)=ρ(0) T(h)T(0)^4.25588T
(h)=T(0)+dT·h，0≤h≤11000mρ(11000)e1.5776×104(h11000)
T(h)=216.65K
ρ(0)=1.225kg/m;
ρ(11000)=0.36391kg/m;
T(0)=288.15K;
dT=0.0065K
See here.
Many people present had a look of enlightenment in their eyes.
Sure enough.
Yuncheng quickly wrote a final formula:
mHe，out(t)+˙mair，out(t)=uΔP(t)，eΔP(t)>0˙mHe，out(t)+˙mair，out(t) =0，eΔP(t)≤0
Then Yuncheng put down the chalk and said to Mr. Wang:
"Teacher, please take a look."
Mr. Wang never looked away from Yuncheng when he started writing. Even halfway through writing, he had completely understood his student's thoughts.
Therefore, after Yuncheng opened his mouth.
Wang Laodang nodded:
"Yes, there is no problem with the derived formula, and it is mathematically acceptable."
Hearing his teacher's praise, Yuncheng couldn't help but chuckle and scratch his hair.
The formula he wrote is not difficult to understand. It is essentially a special atmospheric environment model.
Among them, the atmospheric pressure module Yuncheng has not yet been written, but it can be calculated by relying on the equation of state of an ideal gas.
Then Mr. Wang looked at Yuncheng again and asked him:
"Yuncheng, keep talking."
Yuncheng nodded vigorously and continued to draw a more intuitive diagram on the blackboard:
"Teacher, dear comrades, this is what I think."
"We can change the shape of the hull to be similar to an ellipsoid. The slenderness ratio of the low-drag airship is about 4."
"The ventilation port is paved on the lower surface of the airship with the largest diameter - so that its shape can be considered to be approximately equivalent to a cylindrical shape."
"At the same time, the horizontal flow of stratospheric airflow is relatively stable, and the vertical movement is suppressed. Assume that the airship is running on the local horizontal plane, the hull is parallel to the ground, and the head of the airship is pointing due east. At this time, U2"
Looking at the big bald man in front of me who was talking freely.
Xu Yun suddenly felt a strange sense of déjà vu in his heart.
He seems to have heard this idea somewhere
But when he thought carefully, he couldn't find anything.
Could it be that this Yuncheng was a judge in a future airship design competition?
No, no, not likely.
Yuncheng's appearance looked like he was already in his early thirties. Fifty years later, he would be at least eighty. The academicians of the Academy of Engineering that Xu Yun met at the time were all around sixty.
It's not an airship race, where would it be?
Just when Xu Yun was racking his brains to remember crazily, Yuncheng had already introduced his ideas:
"Teacher, that's almost it."
Seeing this, Mr. Wang patted Yuncheng's shoulder approvingly, and then looked towards the audience:
"Comrades, does anyone have any other opinions on Yuncheng's idea?"
Everyone in the audience shook their heads.
They were not being polite, but they really had no objections.
After all, Yuncheng had already thought of the idea in terms of formulas and ideas. If he objected at this time, it would indeed be a bit foolish.
Then Mr. Wang suddenly thought of something and turned to look at Xu Yun:
"Comrade Han Li, do you have anything to add?"
"Ah? Me?"
Xu Yun was slightly startled and quickly shook his head after realizing that Mr. Wang was indeed asking him:
"No."
Seeing this, Mr. Wang sighed with some disappointment, shook his head and said:
"Then why are you following me? I thought you had some new ideas."
Xu Yun:
"."
Boss, I am a human being, not Doraemon
Of course.
Mr. Wang's words were more of a joke. It was impossible for a person like him to place all his hopes on someone - not even himself.
So it's quick.
Then he started discussing the next question with everyone.
"Next we discuss the down-responsive structure of the airship"
While the entire Immortal Killing Sword team was discussing the structure of the airship.
Several other project teams within the base are also making steady progress.
For example, Sun Junren is responsible for the ultra-wideband proximity fuze.
If Xu Yun had a God's perspective at this time, he would have discovered that their derivation process had reached the final moment of technical implementation.
Once two or three difficulties are overcome, final production can begin.
Another example is the airship capsule that Liu Youcheng is responsible for.
Now, more than 200 donkeys in the base have begun to grind under the hot sun, and fresh apical secretions are constantly being produced.
However, everything in the world always pays attention to some delicate balance, and there will be gains and losses.
Therefore, when several groups at the base are moving forward together.
Thousands of kilometers away in the Second Machinery Department, Liu Bosheng received some bad news.
At this moment.
Liu Bosheng was looking at a young man in front of him seriously, his brows knitted together:
"Xiao Liu, what did you say? That granary in Suicheng caught fire?"
The young man named Xiao Liu is quite tall, but at this time he has his back hunched and his head drooped, and he seems to be in a very depressed mood:
"Yes, Bu Liu, and the fire is very serious. According to relevant statistics at the fire site, the food burning rate exceeds 90%."
Snap!
I heard the number 80%.
Liu Bosheng finally couldn't bear it anymore and slapped the table hard:
"Where is the enemy agent? Have the enemy agents been caught?"
Liu Bosheng did not ask whether it was an accidental fire or arson, but directly asked about the whereabouts of the enemy agents.
After all, he knew the layout of the Suicheng Granary very well. The interior was divided into five sub-warehouses, and the distance between each sub-warehouse was more than 20 meters.
Not to mention the possibility of a fire,
Even if it catches fire, the destruction rate cannot reach 90%.
Xiao Liu, who was opposite Liu Bosheng, was silent for a moment before continuing:
"Bud Liu, according to the news from Comrade Wang Rong, there are a total of 9 enemy agents who set the fire."
"Three of them were shot dead on the spot, four were arrested, and two are at large."
"This was a very organized and large-scale attack by enemy agents. Although there were no casualties, they were obviously targeting supplies."
"."
Hearing this, Liu Bosheng raised his hand again, but after hovering in the air for a while, he put it down feebly:
"Hey"
As an important transfer station in the northwest region of Rabbits, Suicheng Granary can be said to be the core node of the northwest industrial line.
Especially after Mao Xiong aided the Chinese industrial project.
The importance of Suicheng Granary has increased a lot again.
At the same time, the most important thing is.
This time, the food in the Suicheng granary is winter food prepared by the organization for the 221 base!
After all, it is already August, and winter will begin in two or three months.
Therefore, it is not too early to prepare food for the winter in advance.
What makes Liu Bosheng even more worried is that.
The food prepared by the organization this time is enough to support the expenses of the 221 base for four full months, ensuring that all members of the base can devote themselves to project research.
The result is now with the emergence of the fire in the granary.
The burning rate of this batch of grain reached 90%, which could cost your life.
And once there is no food.
Liu Bosheng has no doubt about the consciousness of the comrades at the base, but no matter how high the consciousness is, if the health is not good, the efficiency of research will inevitably be affected.
Suddenly.
Liu Bosheng realized another thing:
The person in front of him, Xiao Liu, who had the same surname as him, was in a confidential position and was not his direct subordinate.
So before coming to inform him, he must have reported the news to the chief.
Think of this.
Liu Bosheng immediately took a deep breath and asked Xiao Liu:
"Xiao Liu, what does the organization say?"
Hear these three words about organization.
Xiao Liu immediately took out a letter from his body and handed it to Liu Bosheng:
"Bu Liu, this is the letter the chief asked me to forward to you."
Liu Bosheng quickly took the letter and tore it up in front of Xiao Liu.
After all, as one of the heads of the Confidential Division, Xiao Liu's secret level is even higher than Liu Bosheng's.
Xiao Liu probably knows what Liu Bosheng knows, but Liu Bosheng may not know what Xiao Liu knows.
Tear——
There was a tearing sound from the letter soon, and then Liu Bosheng took out a very frivolous letter from it.
Then Liu Bosheng shook the letter and gently unfolded it.
I only see this moment.
There is a line of words written on it:
[We already have a solution at home. If necessary, we can call in xx for food emergency. Don’t panic. However, this solution is a last resort and will not be used easily. Previously, three comrades, Guo Youlai, Qian Wushi, and Wang Yaoping, could be invited to come out to interview someone, or there might be a surprise. This matter can be asked after U2 is shot down, and someone can write it down. 】
Note:
I had a heat stroke today, and I feel a little uncomfortable. There will be less updates. I had a scrape and took Huoxiang Zhengqi Pills. I hope I will feel better tomorrow.
Although it is possible to use multiple codes if the condition is poor, the quality of the multiple codes will be very poor, and it will be a scam when sent out.
Please give me monthly votes. I have already received 3,000 votes in two days. With 6,000 votes, I can be a donkey! (End of chapter)