When Yuan Yao recruited Liu Ye, although the trebuchet catalogue he gave him was a counterweight, it was just Yuan Yao's graffiti, a concept map, and there was no data, so it still needed trial manufacturing and experiments to become a real thing, and finally determined the accurate data to be regarded as a finished product.

Because it is a military item, even in ancient times, it cannot be fooled casually, it cannot be like a paper airplane folded by a child, it can be glided after a few folds, even if it is successful, if it is to be used for military purposes, the paper airplane must also ensure that it can fly from a fixed place to the designated area, and can not make mistakes to be completed.

Therefore, the prototype of the counterweight trebuchet needs to be tested while manufacturing to determine, and then large-scale construction can begin, in this process, Yuan Yao's future knowledge in his mind can still help a little, for example, it is Yuan Yao's idea to install a pulley block on the trebuchet......

When the basic data such as the length of the lever and the weight of the counterweight of the slings are determined, the next step is to solve the problem of attack hit rate. As mentioned earlier, the current trebuchet is operated by nearly 100 people, so it is easier to turn the direction to adjust the attack target, because there is a lot of strength in numbers.

But the counterweight trebuchet only needs ten people at most, or even at least five people to operate, it is impossible for this manpower to turn this big guy to adjust the direction of attack, especially after adding thousands of pounds of counterweight, if it is to attack such a large target in the city, then there is no need to turn, no matter how you hit, you can hit, but now Yuan Yao wants to use the trebuchet to hit the moving target of the ship, then you must be able to adjust the direction at any time to meet the requirements, so Yuan Yao proposed to install pulleys on the trebuchet according to the experience of later generations, In this way, it is easy to complete the in-situ turn, but how to do it still depends on Liu Ye and the craftsmen to decide, this Yuan Yao does not understand, he only has a concept, no detailed description, especially the pulley set made of wood, he has never seen it, but although it is just a concept, it has already helped a lot, after all, it is the wisdom summed up by thousands of years in the world, and it is absolutely 100% practical.

Solving the left and right directions, but also solving the problem of the distance of the attack, this does not need Yuan Yao to come up with an idea, because the wisdom of this era can already control this matter. You can adjust the distance of a straight line attack by simply adjusting the height of the counterweight to affect the angle of the projectile.

The last step left is Liu Ye's so-called integration of gossip into the aiming system to calculate the shooting elements, this fantasy plus scientific proposition Yuan Yao thought that he couldn't help, because he didn't even know what gossip was. It's a shame to say, Yuan Yao still knows a little bit about the knowledge passed down from the West, but he doesn't even know the knowledge passed down by his ancestors, but what he didn't expect was that he could engrave the gossip map on the trebuchet, and in the end it was his idea that played a decisive role.

If you don't want to find a way to accurately engrave the gossip on the trebuchet, then only those who are familiar with the gossip map can predict the direction of the aim. That is to say, each trebuchet needs a person like Liu Ye to command it in order to form combat power, and such a person Yuan Yao has no more than one hand in the army, how can it be used on a large scale.

Therefore, Yuan Yao must be able to command a bunch of people to operate trebuchets to have practical combat significance, this problem can make people in the Three Kingdoms era helpless, but for Yuan Yao, it couldn't be simpler, people who can propose to shoot Zhu Yuan naturally have a bunch of ways to solve this problem, but to teach the ancients with poor mathematical ability, the easiest way is the cross positioning method!

Just like a mortar, target the center point where the left and right scales and the upper and lower elevation angles intersect, then calibrate to determine which direction the target is located in the Bagua, and then mark this direction on this point of the trebuchet, and so on, and the entire Bagua azimuth map is engraved on the trebuchet.

In actual combat, as long as one person can visually detect the direction that the enemy is going to enter, and then he can use the command flag marked with the direction of the gossip to command, then the person who operates the trebuchet only needs to rotate the trebuchet left and right, adjust the height angle of the counterweight, and cross the scale pointer to the Bagua map engraved on the trebuchet, so that the positioning and aiming can be realized.

Of course, the accuracy of this aiming is incomparable with later generations, but it can indeed allow a person who doesn't even know the word to aim and attack within a certain range, as long as he knows the eight characters on the Lingqi: Qian, Zhen, Kan, Gen, Kun, Xun, Li, and Dui.

Yuan Yao witnessed Liu Ye fuse science and gossip together, to be precise, it should be fused with the nine palace gossip, because the trebuchet not only has to mark the direction but also the direction, and the direction symbol on the gossip is too vague for ordinary people to distinguish clearly, so Liu Ye integrated the nine palaces into it. The direction text of the Nine Palaces is exactly the same as the Bagua text, except that there is an additional word "Zhong", so it will not cause any trouble to illiterate people.

Of course, being literate is the best, but for this day and age, the requirements are a bit high.

At first, because of ignorance, Yuan Yao couldn't understand how the Nine Palaces Bagua was combined with science, but when he understood a little bit, he got rid of the confusion, putting aside those mysterious things such as divination, the Nine Palace Bagua Map can indeed clearly locate a geographical area, so there is no problem at all in marking and shooting Zhuyuan.

When everything is ready, all that remains is the continuous test shooting, adjustment, burning and other grinding work, the design theory has been fully equipped without any problems, Yuan Yao has no need to follow.

Due to Yuan Yao's full support, Liu Ye quickly completed the complete design of the counterweight trebuchet plus the Nine Palaces Bagua Diagram, and even the prototype has been completed for most of the time, and the entire consumption time only took two days, which has to be said to be a small invention miracle, which can be said to be a perfect fit of ancient wisdom and modern wisdom. This is also the efficiency that Yuan Yao requires, in the face of a war that may occur at any time, Yuan Yao can't wait to add even one more hole card to his side, so that the possibility of victory can be greater, this is also the only thing he can do, training and commanding the battle This kind of thing he is still blind, or leave it to professional people to do it to make people feel at ease.

After the trebuchet is completely developed, as long as Liu Ye is ready to design the catalogue and prototype, then Yuan Yao can include it in the system, and then let the clones replicate it on a large scale, this kind of big guy with a range of 100 steps farther than a ballista can be placed in the rear of the water village, and with the so-called gossip version of shooting Zhu Yuan, it may not be worse than the role of the ballista!

The key is that trebuchets are not picky eaters, and stones of any specification can be thrown, unlike ballistas that are fired flat, and in order to improve the hit rate, there are slots to fix the trajectory, so if the shells are irregular, they will bump and jump when they are ejected, just like putting a square cannonball into the barrel of the gun, so the shooting effect can be imagined, and the accurate head may not even be as good as a trebuchet.

Before, Liu Ye thought that casting round ballista shells with steel was a good solution, just like the solid bullets used in artillery in later generations, which were much easier and smoother than stone-polished stone bullets, but the cost was a bit too high, and the current steel production could not tolerate Yuan Yao's use for play.

In addition to trebuchets, there is another thing that Yuan Yao is looking forward to the most, and it is also what he has been doing since the day he first woke up in the Three Kingdoms, that is, the oar-sail catapult battleship is about to be completed......