This traveler only wants to choose the lowest difficulty

Chapter 269 Artillery Aiming Technology

The students and soldiers watched suspiciously as Wang Dong took out those strange equipment and came to the trebuchet. Wang Dong first put something that looked like a compass on the trebuchet, carefully observed the fence in the distance, and then He took out a ruler-like thing and dragged it for a long time. Finally, Wang Dong squatted on the ground and calculated, and said to the craftsmen:
"Put the iron chain down to one foot six."

Those craftsmen hurriedly executed, they directly removed the iron chain and counted the number of iron rings below.

Only then did everyone discover that the iron rings on the iron chain had been wrapped with cloth strips of different colors at different lengths. The craftsmen could easily calculate the number of iron rings by just counting the number of iron rings. The length of the chain, they counted to a length of six feet, and then took the ring and buckled it on the trebuchet.

Immediately afterwards, Wang Dong directly ordered: "Launch."

But after more than a minute, the stone whizzed out, and then everyone saw that the stone flew hundreds of meters away and hit the wooden fence in the distance accurately. It was smashed directly.

Wang Dong smiled and turned to look at the students.

At the same time, everyone who saw this scene for the first time opened their mouths in shock.

"This...how is this possible?" Liang Shu muttered to himself in great surprise, walked to the trebuchet and looked at the trebuchet in disbelief and then at the destroyed wooden fence in the distance.

He turned his head and asked Wang Dongdao, "How did you figure it out?"

Wang Dong just smiled and saw that he didn't speak, Liang Shu was taken aback for a moment before realizing it, and quickly got up and bowed to Wang Dong: "Please teach me, sir."

Doesn't this speak human language?But it was so rude before, now if you want me to teach you, do you want me to teach you?

Wang Dong didn't care at all, and just talked to himself with his hands behind his back.

"An object will keep moving in a straight line at a constant speed without resistance, until it is subjected to a force to change its mode of motion. A constant force can bring an acceleration to an object. Acceleration means that the speed changes within a period of time. We add the direction of the acceleration and the direction of the velocity as a vector to get a value of the magnitude and direction of the object's velocity at a certain moment. By adding these values ​​together, we can describe the trajectory of the object moving under the acceleration. This It is the basic principle of ballistic calculation."

After Wang Dong finished speaking, he turned his head to look at the students in the future, then directly picked up a branch on the ground, drew a parabola, and said with a smile to everyone: "The process of dropping the weight box of the gravity trebuchet and throwing the stone up is also a process. In the acceleration process, we can directly calculate the initial velocity and direction of the stones according to the different angles at which they are thrown, and then calculate the trajectory of the stones after they are thrown according to the time and angle at which the stones are thrown, and then consider After the error caused by air resistance and so on, we can finally calculate an approximate value... It is a bit complicated to say, but the final result is such a curve. This is the stone thrown by the trebuchet, in the air Trajectories across. From such trajectories we can directly determine the ballistic trajectory."

Wang Dong explained the theoretical basis of the trebuchet's certainty feeling, but he said a lot of babbling, which naturally means that everyone is confused, and the smart ones can probably understand what Wang Dong said about the calculation method. The thing is, the unintelligent people have been directly confused by the fresh terms that are constantly being thrown out.

Wang Dong smiled. He didn't intend to teach these students the specific content of soldiers carefully. After all, this thing has already involved artillery. It is impossible to learn how to shoot artillery without staying in the military academy for two or three years. What's more, the math skills of these people are at most nine chapters of arithmetic. It is really difficult for them to calculate parabolas.

So from the beginning, Wang Dong only planned to teach these people practical techniques. As for the theory, it is enough to talk about it in general, and there is no need to talk about it in detail.

Look at the doubtful eyes of the students asking for help after listening to him, Wang Dong stopped torturing them, and directly asked He Luo to take the set of sights he used just now.Then I will introduce to you how to use the sextant slide rule and other commonly used artillery sights.

Originally, Wang Dong planned to exchange his industrial coupons for a set of artillery sights directly from the system. However, he checked the system and found that a set of 80s artillery sights directly cost more than 1 yuan. Wang Dong instantly It hurts, well, this broken trebuchet is not worthy of such an expensive sight... Anyway, Datang's requirements for trebuchets don't involve accuracy, so why waste money?
I have so many craftsmen with the best skills in the Tang army at hand, so Wang Dong directly picked out a craftsman who specializes in copper work to make such a set of counterfeit goods for himself based on his own artillery. The task made the craftsman very happy. As a military craftsman with excellent skills, he was sent to Wang Dong to make some precision instruments, but he followed everyone to make copper nails on the construction site for a month. , but he was overwhelmed. At this time, he received a task from Wang Dong and directly took out a set of fine equipment that can be used to make jewelry. After a lot of work, the final thing he made was much more exquisite than Wang Dong himself imagined.

Now the set of artillery tools in Wang Dong's box, although it is definitely not eye-catching in the eyes of professional artillery, after all, the accuracy of this instrument is too low, but the range of Wang Dong's trebuchet is only a few hundred meters That's all, what good sight do you want?And this set of very beautiful instruments is still an extremely delicate machine in the eyes of people in the Tang Dynasty at this time.

Wang Dong thought for a while, and made the artilleryman's method of correcting and shooting Zhu Yuan into a fool's operation.

Anyway, these artillerymen don't need to know the specific calculation process, they only need to know the calculation process, so Wang Dong directly put all the things he had calculated into a few slide rules.

The slide rule is definitely a great weapon of modern artillery. The most basic slide rule can only be used for multiplication and division, but the slide rule specially designed according to different situations can be used to solve equations directly, and the special slide rule for artillery is even more useful for artillery calculations. The various equations needed during the test are directly made into the form of a handful of rulers. Even if the parameters of the trebuchet are different, the use of the slide rule is still the same.

Wang Dong only needs to teach everyone the order of pulling different slide rules, and then teach everyone how to substitute the values ​​of different trebuchets, so that even when they use different types of gravity trebuchets, as long as they measure the new value after several test shots After the parameters of the trebuchet, the trajectory of the trebuchet can also be calculated quickly.

But when Wang Dong's method was presented, everyone was still at a loss to learn it at first.

Although this is already an extremely simplified calculation method, after all, it is still necessary to learn how to use instruments such as sextants. For these Tang people who are exposed to these for the first time, it is obviously too difficult. Not knowing, Wang Dong directly called out a student soldier, and then threw a set of equipment to him.

He asked He Luo to re-arrange a wooden fence in the distance, and then guided the student soldier to start using the sextant step by step. After about 10 minutes, the student soldier finally calculated a value, and he was a little uncertain. Looking at Wang Dong, he asked, "Is it one zhang three?"

(End of this chapter)