The moment the red cloth was torn apart, the spinning wheel rotated rapidly with the shaking, and the polished brass and black iron rotated according to their own axis.

Jiang Liu's eyes were shining, his hands were on the edge of the table, his chin was in the gap between the backs of his two hands, and he stared intently at the three staggered spinning gyroscopes.

Shen Kang pointed to the direction specified by the axis, slowly raised his lips, and said with a smile: "Look, this is the north." ”

Jiang Liu blinked and said, "Is this thing really accurate?" I remember you told me, what's that...... The swing effect? ”

Shen Kang grinned and nodded, "A rigid body that rotates around a fulcrum at high speed is called a gyroscope. The so-called gyroscope is specifically referred to as a symmetrical gyroscope, which is a rigid body with a uniform mass distribution and an axisymmetric shape, and its geometric axis of symmetry is its axis of rotation. Under certain initial conditions and a certain external moment, the gyroscope will rotate around another fixed axis while constantly rotating, which is the spinning of the gyroscope, also known as the rotation effect. ”

Jiang Liu seemed to be able to grasp a little of the meaning of this passage, and pointed to the rotating shaft around the fixed axis and said, "This is the spinning of the spinning top, right?" ”

Shen Kang nodded and said, "Yes." ”

Jiang Liu smiled, but his eyes were still staring at the gyroscope, and he asked with a smile: "I only said that you Shen San was crazy back then, but now I can see how crazy you are." Shen Kang, you really live up to the name of the three madnesses. ”

Wang Lucao looked at the gyroscope and said, "Shen Kang, let me ask you, does this thing have any other purpose besides pointing directions?" ”

Shen Kang couldn't help but give a thumbs up and said, "Brother Wang is lofty." ”

Jiang Liu hurriedly said: "Don't sell it, hurry up and talk about it, what is the function of this object?" ”

Shen Kang said: "There are many other functions, but it is impossible to achieve nowadays, the development of science and technology needs to be realized by the times to promote the experiments of countless people. ”

When it comes to the flipping of artillery shells, it is necessary to mention a few words about firearms nowadays.

The explosive firearms of the Ming Dynasty were also quite developed, and there were two categories.

One is landmines, with a wide variety, including dozens of stone mines, ceramic mines, pig iron mines, etc. The other type is mines, which include weapons such as underwater mines, underwater dragon cannons, and mixed river dragons. According to a large number of historical facts, China was the first country in the world to invent and use the "two mines".

In addition to explosive firearms, there are two main categories of firearms in the Ming Dynasty: the first type is the firearm and bird gun that are set by hand, which are large in shape and caliber, and are generally filled with lead bullets and iron bullets, etc., and their range is only tens of steps to 200 steps.

The second type is the artillery that is mounted on the pedestal and fired with a large caliber and shape, most of the barrels are filled with stones, lead, iron and other materials, commonly known as "solid bullets", and a few are loaded with explosive balls, the firing range is generally hundreds of steps to two or three miles away, mainly used for defending the fortress and attacking the city, and also used for field warfare, water warfare and naval warfare.

That is, due to the problem of range, such a developed large open flame did not exert its power enough. But there is no doubt that Daming's firearms are absolutely ahead of the current world.

Wang Lu said: "Have you ever heard of the Franco cannon?" ”

Jiang Liu shook his head slightly embarrassed and asked, "Isn't it just a firearm, that's not a literati's business." ”

Wang Lucao looked at him with disgust, turned his head to look at Shen Kang, and said: "This Franc cannon is the most advanced artillery of our Ming Dynasty, the shells are loaded from the rear, the firing interval is short, and when firing scattered shells, a cannonball carries five hundred bullets, which can block the front ten zhang wide, and the power is amazing." Because breech loading requires high casting technology, it is also a reason why in large-scale battles can only be used to take the lead, but cannot control the situation of the battle. ”

Shen Kang said with understanding: "If you use the rotary gyro to improve the Franc cannon, and change the way of loading ammunition from breech loading to flip loading, then you can greatly reduce the time of loading ammunition and seize the opportunity in the war." ”

Wang Lucao smiled and nodded, and said: "Our Ming firearm is a long skill to resist the enemy, if this rotating gyro can be used to transform the artillery, then the firearm can also be transformed according to the reason." ”

Shen Kang nodded slightly and said, "But for firecrackers, the accuracy will be higher." He paused slightly, and then continued: "If conditions allow, it may be possible to create a burst of handcuffs, which can greatly improve the ability of individual combat." ”

Jiang Liu was puzzled: "What is a repeating handcuff?" Is it like a Zhuge repeater? ”

Shen Kang said: "Fill a number of gunpowder wrapped in paper tubes from the middle of the barrel, connect the gaps between the gunpowder cylinders with leads, and make a round hole in the barrel and insert it vertically into the iron pipe containing lead bullets. The effect was that the first projectile came into contact with the powder cartridge in the chamber. When firing, the gunpowder in the first powder cartridge is ignited first, and the first projectile is ejected. After the firing is completed, the second projectile automatically falls into the chamber, and the gunpowder in the second section of the powder cartridge is ignited by the powder line in the first section of the powder cartridge, and it is shot out in turn, from several to a dozen, increasing the rate of fire. ”

Wang Lucao was a little shocked and lost his manners, couldn't close his mouth, and asked: "Isn't that more combat-oriented than the three-eyed firecracker and the four-eyed firecracker!" ”

Wang Lu muttered to himself: "Three-eyed firearms, four-eyed firearms, nothing more than firing three or four ammunition at the same time, although the concentration is strong, but the loading time is serious, unless it is a large number of troops attacking, it is not very useful." ”

Shen Kang said: "But the repeating handcuff can be fired continuously while saving ammunition, which not only greatly reduces the loss, but also shoots accurately." On this basis, the cavalry was equipped with 10 companies of guns, and each gun was equipped with 10 barrels, each of which was loaded with 10 bullets, a total of 100 bullets, and the 10 tubes were parallel around the axis, and the hoops were combined into 10 barrels, so that the shooting was intensive, and the opponent was suppressed, and in a certain amount of time, the level of combat was greatly improved and a large amount of military expenditure was saved. ”

What man isn't a natural military fan?

When it comes to so many powerful firearms, even Jiang Liu, who has not been educated by Xiangguan, feels eager to try.

At this time, Jiang Liu, where do you still remember the teary-eyed Ruan Xiangjun, what gentle township and Wu Nong's soft words, have long been forgotten.

He stood up suddenly, and said, "How can there be such a powerful weapon in the world!" ”

Wang Lucao nodded and said, "Maybe, very likely." ”

When the three young people were brainstorming, they didn't know what kind of changes today's heated discussion would bring to Daming, nor did they know what kind of historical process this small move would change.