Spring and Autumn I Am King

ps: Chapter 2, ask for a recommendation ticket!

"Just place the brackets here, and then each must measure the distance and angle between it and Qi Jun's vehicle base!"

Under the scorching sun, Gong Shuban, the leader of Zhao's craftsman, was wearing a bunt and stood on a raised high ground on the river bank. The fifteen-year-old boy is no longer the thin and thin he looked like a few years ago. His solid arms can swing a heavy hammer, and his firm eyes can withstand the dazzling gold liquid in the copper furnace. Ignoring the sweat dripping from his head, he stepped on his feet hard, shook his head at the unsteady river sand, and turned his eyes to the thick mud.

The wooden thorn penetrated deeply, and after reaching a certain depth, no matter how you shake it, it will not move, here, yes!

Following his instructions, the machinery was unloaded from the horse-drawn carriage and erected on the river bank. The wooden machinery has a sturdy support, and the main beam is placed on the support. Standing up, it is also a full person tall.

After the soldiers unloaded the machinery, the craftsmen began to reassemble and debug some parts. During the whole process, they were very careful. They and the public transport class knew all too well how hard-won these instruments called "ballistas" were!

Stroking the "spring" made of horsehair, leather rope and animal tendons, Gong Shuban couldn't help but recall the details of building this weapon...

...

It was more than half a year ago, after conquering Handan and returning to Chaoge, Zhao Wuxi finally had time to continue discussing the issue of making new weapons with Gongshu Class.

"The technique of examining work is the basis for promoting the victory of the war!" After Zhao Wuxi issued such a call to encourage the research and development and innovation of war technology, the Zhao family gathered a group of planners and craftsmen in Chaoge, Qufu, and brought them together. Divided into professional groups, each group adopts a division of labor and cooperation to develop or improve weapons and equipment.

Thanks to these efforts, many very novel ideas have been proposed, such as the modification of the crossbow, so that it can shoot farther, or several arrows; research, even including how to use the new material "paper" to make armor. Of course, these developments are still theoretical on paper, and it is too early to put them into practice.

There are also some things that have made rapid progress with the participation of talented craftsmen and young people who are called "Luban" by the Jin people. For example, there is only one wheel, but it can walk on the mountain road like a new type of grain truck.

"This is not imagined out of thin air, but someone has seen it with their own eyes..."

There were more and more compliments around, but Gongshuban knew that he could not do without Zhao Wuxi's theoretical guidance.

General Zhao's idea is too novel, but it has great feasibility! The construction of ballistas is one of them.

It was early one morning, after someone came to Gongxu Ban, Zhao Wuxi began to show him a "trick". He carried a horn bow, and took an extra bowstring and a feather arrow, and then he installed the extra bowstring on the bow body, so one bow was equipped with two strings.

"Bang, you have to look carefully."

Zhao Wuxi picked up a rock the size of a pigeon egg, put it between the two bowstrings, and began to turn them repeatedly until the two bowstrings twisted into a twist and could no longer turn, and suddenly aimed at the wall and let go!

However, after hearing a soft sound of "Teng!", the stone quickly bounced out under the action of the two bowstrings being tightened and released, and finally hit the wall several meters away, knocking off a piece of the broken soil on the wall!

"This is it!?" Ao from Gongshuban went to the third watch last night to study how to make the trebuchet release stones without too much manpower. It's unprecedented!

Zhao Wuxi handed the bow to Gongshu Ban, and let him toss the two bowstrings according to the gourd painting, and said with a smile, "Bang, do you see any way?"

"The reason why the stone flew out was not the elastic force that pulled the bowstring like an ordinary bow and arrow, but the force of the bowstring twisting together and then suddenly letting go... Just like when the cloth that was tightened in the laundry suddenly loosened, the force transmitted to the hand That power is normal."

"Yes, this is a new kind of power, I call it 'torque'!"

Zhao Wuxi had already talked about "force" to the Gongshu class, and he taught him all the mechanics knowledge he remembered from junior high school.

It is not enough to have theory alone, but also to practice. It would be blind for Zhao Wuxi to personally participate in these technical activities, but he can tell Lu Ban what he saw and heard in his previous life. Shirts are unimaginable.

"The reason is very simple, but using this torque, I want you to try to build a new weapon, which is probably like this."

Holding a charcoal pen, Zhao Wuxi drew a rough sketch on bamboo paper, which he saw in a book about ancient weapons in a previous life. The lines are piled up together, and ordinary people can't understand what it is, but in the eyes of the genius Lu Ban, this is a treasure.

"What's this?" Gong Shuban's eyes were bright, and he was completely addicted to this newfound power, and couldn't wait to turn the imaginary into a living weapon.

Zhao Wuxi smiled and said, "This is a ballista. It doesn't require manpower to pull the rope. It is a ballista that relies on the twisting force of tendons and strings!"

...

Everything is easy to think about, but difficult to do. Zhao's material level is sufficient and manpower is sufficient, so it is not difficult to make a low-quality imitation of a ballista. The difficult thing is how to tame the torque and make the proportion of each part of the construction reasonable. , Calculate the range correctly, so that this thing can be used in actual combat.

This is an extremely precise job, and the planners and craftsmen need to try to make different sizes of ballistas according to the size of the torsion spring, which in turn depends on the diameter of the torsion spring. During this period, the engineering team encountered a huge mathematical problem: it was not the square root problem that troubled the Greeks and Romans in making ballistas in history, because even Zhao Wuxi did not realize that the Chinese mathematicians in the Spring and Autumn Period had In the chapter "Shao Guang" in the basic algorithm, the square extraction technique and the cube extraction technique are summed up incisively and vividly!

The difficulty encountered by the craftsmen is the trigonometric function...

Fortunately, this was a junior high school math problem that Zhao Wuxi vaguely remembered. As early as in the state of Lu, Ji Qiao brought out a bunch of students who had the mathematics level of Zhao Wuxi's previous elementary and junior high schools. With these math students around, this problem was quickly solved.

After the theoretical problems were overcome, the progress of manufacturing accelerated, and finally, when the spring flowers bloomed, the first ballista was successfully manufactured!

It has the appearance of a combination of a crossbow machine and a catapult: using the torsion force generated by two bundles of tensioned thick rubber bands as power to drive the crossbow arm to drive the bowstring to project stone pellets or spears. The ballista designed by the public transport class has a sturdy bracket. The main beam is placed on the bracket. There are two torsion spring groups on both sides of the front end. Each spring group drives a crossbow arm. The end of the crossbow arm is connected to the bowstring, and the bowstring is centered It is a woven mesh bag that holds projectiles.

After a short cheer, it was a tense and long experiment. The ballista was indeed as powerful as Zhao Wuxi and Gongshu Ban expected. The range of the first ballista is not far, but it has surpassed the individual ballista. In the process of continuous improvement, the final actual combat version finalized in the late spring and early summer has been able to shoot 20 kilograms of stone pills within 200 steps. !

Outside Diqiu City, Gongshu Ban was instructed to bring dozens of ballistas to shoot several times in front of Zhao Wuxi's interview, and all achieved satisfactory results. Within a hundred paces, the thin earth wall could be directly destroyed. It's just that Wei Ren was too inexperienced and didn't give him a chance to appear.

Moreover, unlike the cumbersome catapult, the new weapon ballista is small, after removing the spring and some parts, it can be transported on a heavy truck!

"So, this thing can be used in field battles!?" Gongshu Ban was a little excited when he learned that the 60 ballistas in his hand were going to move with the army.

Infantry field battles are naturally formed. Thousands or even more soldiers are gathered together to protect their bows and arrows within a hundred paces. This is if the enemy is suddenly attacked by ballistas before they think they have not yet entered the range. ... If nearly a hundred stone bombs of several tens of kilograms are fired at a time, if they smash into a pile of people or a temporary fortification... What kind of devastating effect this will cause, the public transport class can foresee!

"What a weapon!"

Although he is young~www.readwn.com~, Gongshuban has become a little keen on war. He especially likes to siege cities, and he is eager to see the situation where the indestructible city collapses under the co-workers arranged by him. As for field combat, he was equally interested—provided that machinery could play a key role in warfare.

At this moment, on the bank of the Wenshui River, after being questioned by Zhao Wuxi's ordering soldiers, the public transport class asked him to go back to convey the affirmative message. Everything is ready and can fire at any time!

"It's all up to you in a while..." Gong Shuban patted the ballista that had just been dry for a long time, affectionately, the young man's expression was like sending his children to the battlefield, hoping that they would show good deeds to the Kun's father and brothers. ...

The flag of the Central Army was moved, and the messenger came back again to send a message. Until this time, with the call of the public transport class, with the planner and the experienced craftsmen, the distance, bearing, and target position were corrected, and the wind direction was taken into account. , an ordinary cobblestone by the river was put on a ballista and aimed at the enemy!

Under the hard push of the soldiers, the gears rolled, and the two rubber bands were completely entangled together, like the two armies of Qi and Zhao who fought hard.

"Launch!" With a loud shout, the stone bullets roared towards the Qi Army vehicle base two hundred steps away! (To be continued.)