Daming 1805

Chapter 210 Thinking Without Learning Is Dangerous

Zhu Jingyuan thought about the situation in all aspects, and left his office.

Passing through the courtyard of the Wangfu, they came to the warehouse where two planes were stored.

"Type Five Combat Aircraft" and "Type Three Transport Aircraft".

The Ministry of Industry used their official stereotypes order to make a very simple and rude name.

It is not named after the 34th year of Taiping or the first year of Ankang, because there may be several new aircrafts a year.

If there is no special meaning, the text code will not be specially awarded.

So it can only be named by number.

Zhu Jingyuan looked at the two planes in the warehouse, and recalled the first test plane made.

It feels like there might be a bigger difference between them than between a cat and a tiger.

From the structure of steel pipe, steel wire, wood, and canvas, it has become a pure metal structure of steel and aluminum.

Transport aircraft are still biplanes, and combat aircraft have become monoplanes.

The design of the second-generation Daniel Bernoulli, and the aircraft he took to apply for a patent, are all the original style of painting.

My current transport plane can easily bully them.

If the opponent's aircraft patent is passed, and if it is favored by the French military, it will definitely start to iteratively upgrade rapidly.

The biggest factor holding back the development of their aircraft was the engine.

The biggest factor hindering the development of engine technology is the manufacturing process.

If the opponent wants to have an engine with the same power as Daming, it will definitely be heavier or have a higher failure rate.

But in the absence of a choice, the opponent will definitely continue to catch up, and will definitely continue to optimize and upgrade.

However, what if the other party has a choice?

Why did Ming take the initiative to export engines and aircraft to France?

Use better aircraft and engines to squeeze each other's engines and aviation industry from the embryonic stage?

Zhu Jingyuan came to the plane and patted the aluminum skin of the fuselage.

I feel that it is indeed possible to succeed, and the entire French aviation industry has been completely flat since then, and has been using imported goods from Daming.

But there is also a certain possibility that France will learn from Daming's design and craftsmanship and speed up its pace of catching up.

If it is the latter, then you have to deal with it with special care.

For example, if the other party successfully develops a technology, Daming will open up a technology.

Zhu Jingyuan was walking and thinking over and over again, when An Xiaona who stayed at the door suddenly ran in:

"Your Highness, Empress Yun is outside and is here to look for you."

Empress Yun is of course Liu Muyun, and she is the only "empress" in this palace.

Zhu Jingyuan was stunned for a moment:
"Why is this girl here? Didn't she go back to her room to rest? Let her in."

When An Xiaona went back, Liu Muyun walked in quickly. Although it can't be said to be unremarkable, it can't be said to be stable at all.

On the other hand, Ying'er and Ju'er, two little girls, followed behind with small steps, trying not to look hurried.

Zhu Jingyuan asked something else:
"Aren't you resting? Why did you come here by yourself? Is there something urgent?"

Liu Muyun performed a blessing very quickly, and then said quite casually:

"I... Chen Qie found that I have nothing to rest, and Chen Qie has nothing to do, just want to see His Highness."

It is human nature for a newly married girl to want to be with her husband.

Zhu Jingyuan smiled and shook his head, then jokingly said:

"You are injured, and you ran all the way to the front yard..."

Liu Muyun's pretty face flushed slightly, but she was more curious:
"This little injury is nothing... What are you doing, Your Highness? What kind of machine is this?"

Zhu Jingyuan stopped asking:
"This is a flying machine, a machine that can fly in the sky..."

Liu Muyun's eyes widened immediately:

"This is the flying machine!"

Although Zhu Jingyuan's goal is to fully promote the aircraft, so far he has not fully disclosed it to the public.

After all, it has only been made for more than a year, and many technologies are still being verified.

The production capacity of each factory is mainly supplied to the military, and it has not yet had time to be sold to the public on a large scale.

Zhu Jingyuan also hopes to produce sufficiently mature technology as much as possible, and then promote the long-term aircraft that can be used as much as possible.

Moreover, before the Thai and Western countries have developed a usable aircraft at all, it is still counting how long they can keep it.

But now that the secrecy has come to an end, Bernoulli has created the plane, so there is no need to hide it anymore.

Liu Muyun has never seen an airplane before, but there are related researches among the people, and he heard about it when he was in school.

With a lively personality, she has absolutely no resistance to the possibility of flying like a bird.

So I paid special attention to it, and even thought about making it myself, but the conditions did not allow it.

Seeing the complete and mature-looking plane now, Liu Muyun became very excited.

Turning around the combat aircraft, carefully touching its aluminum skin, I was very surprised and said unexpectedly:
"I thought about making an airplane at the beginning, but I only considered using steel pipes, wood and canvas, and I had to use as light a material as possible.

"This thing is completely made of metal. Even if it's made of aluminum, it must weigh a ton or two for such a big thing. Can it fly?"

Zhu Jingyuan nodded as a matter of course and said:

"Of course I can fly. I have done a lot of tests. It only takes more than an hour to go from the capital to your hometown Jinan."

Liu Muyun was stunned immediately:
"The capital! An hour! Come to my house!"

Seeing her reaction, Zhu Jingyuan was quite satisfied in his heart.

Then I watched Liu Muyun turn around, looking at Zhu Jingyuan with yearning:
"Your Highness, can I fly the plane by myself!"

Zhu Jingyuan shook his head directly:

"No, you are not an ordinary student now, you must know that the son of a thousand gold can't sit on the throne, and the son of a hundred gold can't ride a horse.

"But after the transport aircraft is more mature, you can travel by air when necessary."

Liu Muyun's expression immediately became very regretful.

However, she is not a character who is easy to hurt spring and autumn, so she added the last sentence quoted by Zhu Jingyuan:

"The Holy Lord is lucky enough not to take advantage of danger..."

Zhu Jingyuan nodded directly and said:

"You don't need to persuade me. Although I am not a Holy Master, I will not fly a plane by myself, and I even try not to fly a plane."

Liu Muyun stopped talking, and walked around the plane again with a bitter face, her attention had already shifted.

Full of curiosity and high spirits, he came back and asked Zhu Jingyuan:
"Your Highness, how does the flying machine fly? Why can it fly?"

Zhu Jingyuan also looked at the plane, and thought about how to explain it to her:

"You should have played kites, right? The heavier the kite, the harder it is to fly.

"But as long as you pull the kite fast enough, or the natural wind is strong enough, no matter how heavy the kite is, it can fly.

"The logic of an airplane is to change you who dragged a kite with a string into an engine and a propeller.

"The engine doesn't want you to need a rest, it can drag the plane with its head up all the time.

"The plane is going fast enough, or the wind blowing on the face is strong enough, and the plane can fly.

"Then as long as the engine doesn't stop, like a person dragging a kite, the plane can keep flying like a kite."

Liu Muyun suddenly realized, then glanced at the plane again, and asked another question in a jumping mind:
"If the wind is right, the kite can be dragged by the line and stay in the air stably. Is it possible for an airplane weighing several tons?"

Zhu Jingyuan thought for a while, changed his thinking, then nodded and said:

"If the wind speed is appropriate, the flying plane can be the same as the flying kite, and it will remain stationary in the air relative to the ground.

"The plane may even go backwards. The engine is not a rope fixed in your hand, but the kite line is broken.

"When the plane is stationary relative to the ground, the flying speed is zero, and when it is moving backward relative to the ground, the speed is negative.

"But the speed of the aircraft relative to the wind, that is, the speed of the surrounding air is not zero, nor can it be negative."

Liu Muyun suddenly realized again:
"That is to say, no matter how heavy or how big a kite is, it's still a kite. Then again, as long as the speed is high enough, no matter how heavy or how big a kite is, it can fly."

Then she immediately had a new question:

"Then why can kites and airplanes fly?"

Zhu Jingyuan looked at the girl with tangled eyes.

Although she is theoretically four years older than herself, the combined age of her two lifetimes is much older than her.

Moreover, girls who grew up in this conservative environment have much simpler minds than girls in later generations.

She is already 20 years old, and her personality is still like a child, but her knowledge is not low.

"You haven't studied fluid mechanics, have you? Then do a force analysis according to the fundamental theorem of mechanics.

"The wind blows the kite and the wing upwards, and the force received by the wing can be decomposed into a backward force and an upward force.

"The propeller drags the plane, or the person drags the kite forward, and the forward force formed counteracts the backward force.

"The force on the kite and the plane itself is only the upward lift force and the downward gravity force.

"The greater the speed of the kite and wing into the wind, the greater the upward force.

"When the upward force exceeds the gravity of the kite or airplane, it can fly.

"Correspondingly, the greater the windward speed, the faster the person towing the kite runs, or the greater the power of the engine."

Liu Muyun immediately understood the logic, nodded as a matter of course, and continued to ask curiously:

"What if you have studied fluid power?"

Zhu Jingyuan said expressionlessly:
"If you have learned it, you don't need to ask me."

Liu Muyun immediately said:

"But I haven't learned it before, so I asked His Highness, if I have learned it, how should I understand it?"

Zhu Jingyuan hesitated for a few seconds, looked at the curious eyes of the girl in front of him, and decided to explain a little bit:
"A bowl filled with thick soup accidentally spilled a little.

"This drop of soup will not fall directly, but will flow inward along the wall of the bowl.

"Eventually run down to the bottom of the bowl, making hands sticky when grasping the bowl..."

Liu Muyun immediately nodded and said:

"Yes, that's true, because soup is sticky. What does this have to do with airplanes?"

Zhu Jingyuan did not answer directly, but continued with guided inquiries:

"If the side wall of the bowl becomes so thin and soft that any force will deform it, will the soup still flow inward along the side of the bowl?"

Liu Muyun was stunned for a moment, and with a flexible mind, she immediately reacted:
"In an ideal state, where the walls of the bowl are extremely soft and deformable, the soup that comes out will drip normally.

"The extremely soft walls of the bowl will deform with the dripping soup, deforming to the normal trajectory of the soup dripping.

"The wall of the bowl was glued by the dripping soup, so the plane and the kite were actually glued together by the air flowing from above?"

"I will draw inferences from one instance..."

Zhu Jingyuan smiled and sighed, and took out a piece of paper at the warehouse registration desk.

Hold one end of the paper with your hand and let the other end hang down naturally.

Blow air from the direction of the hand towards the drooping end, and the drooping other end floats up by itself:

"Look, the fast-moving air glued the drooping paper..."

Liu Muyun blinked her eyes, and said in disbelief:

"No, Your Highness, our middle school teacher has done this experiment.

"But he said it was because the air was moving faster, so there was less pressure, and the air was moving lower, so there was more pressure, so the paper was lifted.

"It's not glued together...well, it seems that I can't say it's not..."

When Liu Muyun said it to the end, he had already reacted:

"This... the air flow is fast, so the pressure is low, and the air can stick the paper. Is this actually the same thing?"

Zhu Jingyuan felt that this child was really smart, so he nodded with a smile on his face and said:
"Yes, it is the same thing, two different ways of expressing it, the essence is energy conservation.

"Water is viscous, and when it flows over the surface of a bent object, it will deflect along the bend and speed up.

"Air also has a viscous effect, and when it flows over a bent surface, it will also deflect in the direction of the bend and speed up.

"However, mechanical energy is conserved, and the speed of the forward flow is accelerated, and the direction is also deflected, all of which require energy consumption.

"Then these fluids contract, they contract inwards of the fluid, and the pressure on the curved surfaces that flow through them decreases.

"Just like when the dough is stretched, the middle of the dough will become thinner, and the pressure of the thinner part on the table will be reduced."

Listening to these explanations, Liu Muyun's eyes lit up completely, and his spirit was particularly uplifted.

Seems to have discovered something extraordinary, repeating over and over again:

"It turns out to be like this, it turns out to be like this..."

Zhu Jingyuan watched from the side, but immediately reminded him seriously:
"You just know what's going on, and you don't have to think too deeply, unless you want to teach yourself fluid dynamics."

Liu Muyun was stunned:
"Why can't you think deeply without studying fluid dynamics?"

Zhu Jingyuan gave a direct sentence:
"Because thinking without learning is perilous, and thinking without learning will be full of doubts and even have counterproductive effects."

Why can modern fighter jets turn over and still fly?
Why is the upper surface of the wing raised, which can make the air flow on the upper surface faster?
Why can a uniform flat plate, or a symmetrically raised wing up and down, also be able to fly?
If you don't study theory, don't do serious research and calculations, and just imagine these problems, you may fall into sophistry, self-doubt, and even start to believe in agnosticism.

It is asserted that human beings still do not know how airplanes fly, human beings do not know why bicycles do not fall down, and so on.

Even the formation of human beings is just a summary of the laws, and human beings do not know the reasons for the formation of the laws and other concepts.

In fact, this is not "the law is unknowable" at all, but "I don't know it".

Going a step further, instead of relying on learning, relying on brain supplementation to discover new "laws" of "solving doubts", and then rejecting the existing proven actual laws, it has evolved into the so-called "civil science".

Physics is a subject that describes objective laws, and science is a way of thinking that explores and discovers laws.

Why a law is a law is a philosophical question, not a physics question.

(End of this chapter)