Chapter 466

Shen Kang hurriedly took out a spherical sachet from his arms and said, "Big brother, look at this." ”

Wang Lucao looked at it fixedly, became even more angry, and said, "The plaything is demoralized!" ”

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

Wang Lu glanced at the sachet with bare eyes, and snorted coldly: "This sachet is just a little more exquisite than the normal sachet, what else is different?" ”

As he spoke, he twisted his face to the side, his chest rising and falling, as if he was still in a state of rage.

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

Wang Lucao looked at the incense inside the sachet and was puzzled.

Jiang Liu said: "Shen San said, he can transform this thing into a navigation guide, and the Ming Navy will never lose its way from now on!" The first gyroscope was the Lai of France... What did Lai study out, this, that... What is the history of the rotor in high-speed rotation......"

It was really difficult for Jiang Liu to completely retell what Shen Kang had said, those obscure words were not poems he was familiar with, where could he open his mouth?

Seeing that Jiang Liu was so speechless, Wang Lucao said angrily: "You don't have the slightest remorse, do you still want to write lies to deceive me?" ”

Jiang Liu bit his tongue anxiously, and pulled Shen Kang with a red face: "You, you come!" ”

Shen Kang was pulled by him, and when Wang Lucao saw Jiang Liu's performance like this, he believed it in his heart, maybe these two boys really found something, and his eyes became hesitant.

Shen Kang took the sachet from Jiang Liu's hand, and said with a straight face: "This thing can be used as a navigation direction guide." ”

Wang Lucao frowned slightly, and said: "Let's not say whether your words are true or false, now navigation can also rely on Sinan and others to guide, your rhetoric will inevitably add to the snake." ”

Shen Kang smiled, held the sachet in his hand, put his hands behind his back, raised his head and said: "In the Han Dynasty, people used natural magnets to guide tools, called "Sinan", Sinan was shaped like a spoon, placed in a copper square site, the ground was engraved with twenty-four directions, Sinan turned in the smooth plate, and when it stopped, the spoon handle pointed south. ”

He smiled slightly and asked, "Is what Shen San said right?" ”

Wang Lucao frowned, looked solemn, and said, "Yes, your description is very accurate. ”

Shen Kang continued: "Yes. What kind of ingredients should this scoop be made of? ”

Wang Lucao thought for a while and shook his head: "It is an extremely difficult magnet to find. ”

Shen Kang smiled and said: "The eldest brother has read poetry and history, and he still doesn't know what this magnet is, I'm afraid that there are very few people in the world who can tell what this magnet is." ”

Wang Lucao realized at this time that Sinan had always been in his mind, but there were too few people who had really seen it, and the reason for this was probably that this mysterious magnet was too difficult to find.

He nodded and said, "Shen San, you can go on." ”

Shen Kang said: "Sinan is more likely to be made of natural magnets, but the magnetic moment of natural magnets is very small, and the vibration and friction in the production process will demagnetize it, which is an insurmountable difficulty. ”

Shen Kang smiled, thinking to himself, there was no artificial magnet in the Han Dynasty, and there is no artificial magnet in the Ming Dynasty now, and modern people put the natural magnet produced in Yunnan into a strong magnetic field to magnetize, so that the magnetic moment can be increased This is not something that the Ming Dynasty people in the Han Dynasty and even today can think of and do, so in the real use of Sinan, the difficulty is extremely great.

Wang Lu said: "There are still guide cars that can be used." ”

The guide car is also known as the Sinan car, which is different from the use of magnetic effect by Sinan, without magnetism, and is a mechanical device that uses a mechanical transmission system to point out the direction. Its principle is, rely on manpower to drive the two-wheeled guide car to walk, rely on the mechanical transmission system in the car to transmit the difference between the two wheels when steering to drive the car pointing to the wooden man and the direction of the car steering opposite angle is the same, so that the wooden man on the car indicates the direction, no matter where the car turns, the hand of the wooden man always points to the direction indicated by the wooden man when the guide car departs, "although the car is back and the hand is often guided".

Shen Kang smiled: "The guide car is indeed an outstanding achievement of ancient mechanical technology. However, the mechanical guide car also has its drawbacks. Because all mechanical guide cars work with a "differential" between the two wheels. ”

Jiang Liu smiled and asked, "What's wrong with this?" ”

Shen Kang sighed, and then explained: "Because it is working mechanically, it wants the two wheels to be pure rolling with the ground. This is an ideal mathematical model, but in practice there will be bumps caused by potholes in the ground, which will cause the wheels to idle and cause errors. ”

He paused, feeling a little thirsty in his throat.

Jiang Liu naturally sent a cup of tea and said, "Say it quickly." ”

Shen Kang took the teacup, took a sip of tea, and then continued: "Now people have mastered other ways to identify the direction, probably only look at the sun and see the stars or something, and the direction of the guide car should be complementary to each other, history records that the Yellow Emperor is a guide car used in the fog, as long as the fog occurs within the marching distance, which restored guide car does not have a large error, it should be a more successful recovery of the guide car in terms of pointing accuracy." After the fog cleared, the ancients could discern the direction in other ways. But in the midst of sailing, in the midst of marching and fighting, how can there be no bumps and bumps? In the actual march, if the direction of this guide car is deviated due to bumps......"

Shen Kang frowned and said: "Whether it is against the southern and northern captives, whether it is in the sea or in the grassland, it is not the terrain that my Ming army is familiar with, as long as there is a slight deviation, the consequences are unimaginable." ”

Wang Lucao's expression was solemn at this time, and he said, "Then how do you use this sachet?" What are the difficulties in the process of application? When will this thing be used in the military? ”

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

"The gyroscope in this sachet is the prototype, with only a slight modification, it can create a truly portable, unaffected gyroscope, which can be used for marching and fighting, for exploring the New World, and the gyroscope has many benefits in the application, such as: small size, light weight, low cost, high reliability. There are no rotating parts inside, all-solid-state device, resistant to large overload impact, long working life, low power consumption, and large range. ”

Shen Kang smiled and said, "Even the Great Ming Fire Weapons Battalion can use it in the measurement of missile loads." ”

Jiang Liu's eyes widened, and he said, "You didn't tell me so much, this gyroscope has so many uses!" ”