Chapter 466

Chen Kang quickly took out a spherical sachet from his arms and said, "Brother, look at this. Recommended: Xiangnan Xiaoxiaosheng, the master's new work: "The Mingyue of the Great Song Dynasty" http://m./0_1/"

Wang Lu looked closely and became more angry and said, "I'm losing my ambition!"

Chen Kang said: "Brother Wang, take a closer look at this sachet."

Wang Lucao glanced at the sachet with his eyes and snorted coldly: "This sachet is just a bit more exquisite than normal sachets. What's the difference?"

As he said that, he turned his face aside, his chest kept rising and falling, as if he was still in rage.

Jiang Liu stepped forward anxiously, took the sachet over, lightly opened the snap, and said, "Look."

Wang Lucao looked at the incense inside the sachet and couldn't understand the meaning.

Jiang Liu said: "Chen San said that he could transform this thing into a navigation guide. From then on, the Ming Navy will never lose its direction! The first gyroscope was from France, what was the researched by Lai, this, that... what history of the rotor in high-speed rotation..."

It is really hard for Jiang Liu to completely retell what Chen Kang said. Those rare words are not the poems he is familiar with, so where can he just speak?

Seeing Jiang Liu stammeringly, Wang Lucao said angrily: "You don't have any regrets at all. Do you still have to write lies to lie to me?"

Jiang Liu bit her tongue anxiously, and pulled Chen Kang over with red face: "You, say!"

Chen Kang was pulled by him and staggered. When Wang Lucao saw Jiang Liu performing like this, he felt a little convinced. Perhaps these two boys had really discovered nothing and their eyes became hesitant.

Chen Kang took the sachet from Jiang Liu's hand and said seriously: "This thing can be used as a guide to the direction of navigation."

Wang Lucao frowned slightly and said, "Don't say whether your words are true or false. Now you can rely on Si Nan and other objects to guide your navigation. Your words are a big deal."

Chen Kang smiled, held the sachet in his hand, put his hands behind his back, and raised his head and said, "In the Han Dynasty, people could only use natural magnets to guide tools, called "Sinan". Sinan is like a spoon and is placed in a square copper terrain. There are twenty-four directions engraved around the terrain. Sinan rotates in the smooth plate. When it stops, the spoon handle points to the south."

He smiled slightly and asked, "Is Chen San correct?"

Wang Lucao frowned and looked solemn, saying, "Yes, your narration is very accurate."

Chen Kang continued: "However, what kind of material should this spoon be made of?"

Wang Lucao thought about it and shook his head: "It's an extremely difficult magnet."

Chen Kang smiled and said, "Brother, I'm very familiar with poetry, books, unofficial history, but I don't know what this magnet is. I'm afraid that it's really tiny for those in the world who can tell what this magnet is."

Only then did Wang Lucao realize that Si Nan had been in his mind, but there were too few people who had actually seen it. The reason was probably that this mysterious magnet was too difficult to find.

He nodded and said, "Chen San, please continue."

Chen Kang said: "Sinan is more likely to be made by using natural magnets, but the magnetic moment of natural magnets is very small, and vibration and friction during the production process will demagnetize it. This is an irreversible difficulty."

Chen Kang smiled and thought to himself that there were no artificial magnets in the Han Dynasty, and there were no one in the Ming Dynasty today. Modern people also put natural magnets produced in Yunnan into strong magnetic fields to magnetize their magnetic moments, which was not something that people in the Han Dynasty and even today could think of and do. Therefore, Sinan had great difficulties in real use.

Wang Lucao said: "There is still a guide bike that can be used."

The guide truck is also called the Sinan Vehicle. It uses magnetic effects and does not use magnetism. It is a mechanical device that uses mechanical transmission systems to point out the direction. The principle is to rely on manpower to drive the guide truck with two wheels to transfer the difference between the two wheels during steering to drive the direction of the wooden man on the vehicle to the same angle as the steering direction, so that the wooden man on the vehicle indicates the direction. No matter where the car turns, the wooden man's hand always points to the direction indicated by the wooden man when the car sets the direction indicated by the wooden man when the car sets the direction indicated by the wooden man when the car sets the "car returns and keeps the hand guides."

Chen Kang smiled and said, "Compass is indeed an outstanding achievement of ancient mechanical technology. However, mechanical compass also have its shortcomings. Because all mechanical compass cars work with the "differential" between the two wheels."

Jiang Liu asked with a smile: "What's the problem?"

Chen Kang sighed and then explained: "Because it uses mechanical work, it wants the two wheels to roll purely with the ground. This is an ideal mathematical model, but in reality, there will be bumps caused by the bumps in the ground, causing errors in the wheels to idle."

He paused, feeling his throat was dry.

Jiang Liu naturally gave him a cup of tea and said, "Tell me quickly."

Chen Kang took the teacup, took a sip of tea, and then continued: "The other ways people have mastered to distinguish directions, probably only look at the sun and the stars, which should be complementary to the direction indicated by the compass. Historical records that Huangdi was a compass used to marching in heavy fog. As long as the marching distance of the fog occurs, which type of repaired compass does not have large errors, it should be a compass that has been successfully restored in terms of direction accuracy. After the fog dissipates, the ancients could distinguish directions in other ways. But in navigation, in marching and fighting, how can there be no bumps and bumps? In actual marching, if the direction deviation occurs due to bumps..."

Chen Kang frowned and said, "Whether it is fighting against the southern Japanese and northern enemy, whether it is in the sea or the grassland, it is not the terrain that our Ming army is familiar with. As long as there is a slight deviation, the consequences will be unimaginable."

Wang Lucao looked solemn at this time and said, "Then how should you use your sachet? What are the difficulties in using it? When will this thing be used in the military?"

Chen Kang pinched the small spherical sachet between his fingers again, and presented it to Wang Lucao on the side that Jiang Liu opened.

"Using the gyroscope in this sachet as a prototype, with just a slight modification, it can create a truly convenient portable gyroscope that is not affected by road sections. It is used for marching and fighting, and is used to explore the New World. Gyroscopes have many benefits in applications, such as small size, light weight, low cost, and high reliability. There are no internal rotating components, all-solid-state devices, resistant to large overload shocks, long working life, low power consumption, and large range."

Chen Kang smiled and said, "Even the Great Firearm, it can be used for missile load measurement."
Chapter completed!