"Boom ......"

Dozens of heavy stone bullets, spanning a distance of hundreds of steps, smashed fiercely into Yicheng.

Standing on top of the city tower, I only felt a gust of wind howling in mid-air, and then stones the size of a giant sun fell hard in front of and behind the soldiers of the Zhao army.

In the loud rumbling sound, bursts of dust flew instantly.

When the dust cleared a little, the huge depression in the ground was clearly visible.

The only two stone bullets that hit the tower, except for killing a few hapless Zhao soldiers, did not cause serious damage to the walls of Yicheng - except for a slight dent.

It's not that the power of the stone bullets is insufficient, but that the city walls of Yicheng have been firmly reinforced by Zhou Qi, and there are only two stone bullets smashed on the city walls.

Yes, the stone bullets of the Qin army seem to cover the sky and the sun and have great power, but in fact, the stone bullets that can hit the tower of Yicheng City are extremely limited. It smashed many houses in the city.

Of course, unfortunately, behind the city wall, the catapult of the Zhao army, which was a sharp weapon for defending the city, was also accidentally destroyed by the stone bullets of the Qin army.

However, if you stand on top of the tower, you should be able to see dozens of improved catapults lined up in an orderly manner in the area sealed off by the heavy curtain.

The mere two catapults had no effect on Zhao Jun at all.

And if you look closely at Zhao Jun's catapults, you will find that they are completely different species from Qin Jun's stupid black and thick things.

Although in appearance, Zhao Jun's catapult is far less stout and powerful than Qin's army, its power is fundamental

It is not comparable to the catapult of the Qin army.

If the catapult of the Qin army is the most primitive catapult using human brute force, then the catapult of Zhao Jun is at least the third generation of catapult.

Judging from the effect of the actual battle, the huge stone bullet of the Qin army is indeed enough to bluff people.

A stone bullet smashed down, whether it is soft ground or a strong city wall, is mostly a huge pit, and there are few and a little depression, which is not insignificant.

But the problem is, it's not accurate. Even if nothing changes, the same catapult, two consecutive starts, the distance of the stone bullet can be a hundred paces.

It can be said that where this thing hits depends on the will of God!

No way, this is determined by the principle of the most primitive catapults. As mentioned earlier, the Qin army's catapults were still powered by manpower.

And the problem of this quasi-head lies in the mobilization of this manpower.

This time this person didn't exert his strength, and the next time that person's foot slipped a little, the pulling force applied was different, and the distance at which the stone bullet flew out was different, and even because there were seven ropes tied to one end of the rope, the force on each rope was different, and the angle at which the stone bullet flew out was also different.

The angle and distance are uncontrollable, and it would be strange if there was an accurate head!

This is also the reason why catapults usually stop attacking after a close encounter, or even before the army is about to rush to the city. It's very simple, if you are not careful, there is a risk that this stone bullet will hit your head. Naturally, the besieging side would not continue to use such a weapon that injured the enemy by 800 and damaged 1,000 by itself.

But

The defenders don't have this concern, they can fire at the enemy all the time, and even if they can't kill or injure many enemy troops, they can block and delay the enemy's attack.

However, as the war continued, the decline in the physical strength of the soldiers was predictable, and the distance at which the natural stone projectiles were thrown would get closer and closer, and in the end, even the effect of blocking the enemy army would not be great.

But the catapult modified by Zhao Kuo himself is different! Although his principle is not complicated, its power, especially accuracy, is much higher than that of today's catapults.

And it naturally has also left a strong mark in history - back to the artillery!

Yes, it was the Mongolian iron cavalry that crisscrossed Europe and Asia, smashed countless castles, city walls, and camps, and became famous in the Battle of Xiangyang, which terrified the enemy army - the counterweight stone throwing machine - "return cannon".

In fact, his principle is not worth mentioning, which is to replace human power with gravity.

Specifically, it is to use the principle of leverage to modify the original rock-throwing vehicle. The longer end, which was originally pulled by hand, was turned into a fixed wooden box with heavy loads, while the shorter end was left vacant for the stone bullet to be loaded.

Before firing, the end where the projectile is placed is pulled down with a winch or directly by hand, and at the same time it is fixed with a hook, and at the same time, the other end containing the heavy object will also rise at this time.

During the battle, after placing the stone bullet, unhook the hook lock at one end of the stone bullet, and the end where the heavy object is placed falls instantly due to the relationship of torque, so that the assembled stone bullet is thrown out of the situation.

Compared with the manpower catapult, such a powerful catapult has obvious advantages.

First of all, only

The weight is heavy enough, the long end is long enough, and theoretically, the attack range and attack power of the catapult can be increased exponentially!

Secondly, in terms of manpower, using a winch and pulley, such a return cannon only needs five people to operate - three people to press the rod and two to load. It greatly saves manpower and material resources.

Of course, finally, and most importantly, such a return cannon only needs to master the ratio of a counterweight to the stone being thrown, and it can almost point to where it can be hit!

Although, this kind of arithmetic is somewhat difficult for the soldiers of the Qin army who can't read a few big characters.

But this is not difficult for Zhao Kuo! A physics problem for force analysis, plus a math problem for finding a parabolic trajectory, makes it easy to come up with a formula for the difference between a heavy object, a stone projectile, and an attack distance.

Although it is a little difficult for Zhao Kuo to teach this formula, as long as the specifications of the stone bullet are roughly determined, it is easy to form a table of the mathematical relationship between the weight and the attack distance.

Even this table doesn't need too many coefficients, there are three distance correspondences of "short, medium, and long", which is enough.

The "short-range" counterweight, which is responsible for destroying siege engines that are close to the city walls; the counterweight of the "medium range", which is responsible for blocking and destroying as much as possible the living forces of the enemy; As for the "long-range" counterweight, it is naturally responsible for destroying the opponent's catapults and other long-range weapons.

Of course, there is still fine-tuning on this basis, as long as you remember the principle, add the counterweight to shoot farther, and reduce the counterweight to shoot closer.

As a secret unit that Zhao Kuo has been training for a long time, he has naturally already figured out his temperament.

since

The Qin army's catapult had already launched a brazen attack, and the Zhao army's catapult should naturally not be made to be predominant.

Looking at the dust in front of him, Lian Po decisively ordered: "Order the artillery battalion to destroy the enemy catapult immediately." ”

"Yes." Zhou Qi immediately agreed.

It's like a sniper's primary target, always an opponent's sniper. Although Lian Po didn't know what a sniper was, he obviously knew that as long as he disposed of something that could threaten his catapult, his catapult would be invincible.

Naturally, the Qin army's stone-throwing cart that had been exposed was his first choice. Of course, the shaking caused by the boulder smashing on the city tower just now may also be one of the reasons why Lian Po wanted to take down the Qin army's stone-throwing cart in the first place.

Soon, the flags on the city head rolled, the drums and horns changed, and General Zhou Qi personally rushed down the city tower with a token in his hand, and rushed to the artillery camp that was heavily defended behind the city tower.

The reason why Zhou Qi personally gave the order was for no other reason, this "return to the artillery" type catapult seems to be the same as today's catapult, but in fact, his principle is not worth mentioning at all.

It can be said that the technology is a layer of window paper, which will be broken when stabbed.

Before gunpowder and other more powerful long-range offensive methods came out, this was almost the most powerful long-range offensive means in cold weapons.

The powerful technique is simple, and as such, its technique must be kept strictly secret.

Naturally, Zhao Kuo set extremely strict rules for the use of this artillery battalion, and in the entire army, except for Lian Po, the only one who could mobilize the artillery battalion was Zhou Qi.

That is, the battle of Yicheng is related to the next five to ten

Qin Zhao's strength and weakness have changed hands, otherwise, Zhao Kuo would not have shown his hole card in front of Qin Jun at all!

Soon, the artillery battalion, which had received Lian Po's order, had already adjusted its counterweights.

As the red flag fell in the captain's hand, Zhao Jun's catapult finally let out their roar.

"Whoosh" is another dozens of stone bullets lifted into the air, but Zhao Jun's stone bullets are nothing in front of Qin Jun's stone bullets.

Especially when the stone bullets of the two sides were staggered in the air, Zhao Jun's stone bullets were almost as weak as a chicken cub under the backdrop of Qin Jun's stone bullets.

The soldiers of the Qin army, who had already begun to advance towards the Yicheng City Tower, couldn't help laughing when they looked at this funny scene in the air.

It's just that what they don't know is that although the chick is weak, it has a sharp beak and a beak that can peck through the gravel.

But soon, Zhao Jun will make up this lesson for the soldiers of the Qin Army!

The second round of stone bullet attacks of the Qin army was almost the same as the first round of stone bullets of the Zhao army, and at the same time fell into the opponent's camp.

It's just that the stone bullets of the Qin army, which covered the sky and the sun in the air, still only brought a few dents and dozens of casualties to the Yicheng City Tower and the soldiers of the Zhao army.

And the stone bullet of Zhao Jun, which looked weak, fell straight into the array of Qin army's stone throwing vehicle.

After a few crisp sounds of "bang bang bang", several giant stone throwing vehicles that the Qin army had easily formed were annihilated in the billowing smoke and dust. Even the hundreds of soldiers of the Qin army who were pulling fiber nearby were all wrapped up in broken wood and gravel.

Blood flowed all over the land almost instantly!

The wails also instantly sounded on the front army position.

As the former commander-in-chief of the army, Meng Fu

I couldn't help frowning, my men and horses hadn't touched the city tower yet, and they let out such a wailing sound, obviously this is not a good sign!

It's just that the army has been deployed, and all kinds of siege equipment have been pushed onto the battlefield, and the so-called arrow has to be fired, even if Meng Fu is worried in his heart, it is impossible to stop the attack at this time.