After this "seeing is believing" experience, Chen Wei was speechless.

To be precise, it's not "nothing to say", but "incoherent" or it can also be said to be "angry"!

"This is impossible!"

"How can you be so accurate?"

"It's just good luck!"

…

But after Shen Bing tried it several times and it kept happening, Chen Wei had to believe this fact and shut up.

The range and accuracy of the new trebuchet can be adjusted.

Although the accuracy is still not high, it is much better than the previous human-pulled trebuchet.

Explain using the knowledge of modern physics.

A human trebuchet requires at least thirty people to pull it at the same time.

The position where each person stands, the strength of each pull, the speed of the pull, the direction, etc.

These determine that the force exerted by the gun cable on the gun tip is different each time it is fired.

The force acting on the gun tip is different, which means that the muzzle velocity of the stone projectile cannot be the same.

Therefore, the shooting range is sometimes close and sometimes far away, and it is common for nine out of ten shots to miss.

Sometimes there may even be unexpected dangers.

The most serious thing is that the force is too weak to throw the stone projectile, and the stone projectile will hit one's own people or even the trebuchet itself from top to bottom.

These problems can be avoided by using counterweights.

Its force is certain, predictable and calculable.

If you ignore the effects of air resistance, wind speed, wind direction and shape, you can even calculate its landing point.

So there is higher accuracy.

This also strengthened Yang Duanhe's determination to improve the trebuchet.

So three days later, the Qin army built thousands of new trebuchets.

In fact, if it were just a trebuchet, if tens of thousands of people worked for a few days, they would probably have tens of thousands of them.

But the more important thing about trebuchet siege is actually not the trebuchet, but the stone bullets.

If calculated based on firing one stone bomb in five minutes.

Then thousands of trebuchets would fire 24,000 stone projectiles in just one hour.

Two hundred and eighty thousand stone bombs are needed in one day.

You must know that these stone bullets are not just random stones.

They must also be weighed and slightly polished to ensure accuracy.

What's more important is that once the siege begins, the attack must be carried out day and night and all day long.

Otherwise, there may be a situation where the Qin army attacks and the Zhao army repairs, and then the situation will never end and never be able to capture the city wall.

Therefore, most of the Qin army's troops were not actually making trebuchets, but quarrying stone, making and transporting stone bullets.

Fortunately, the Qin army had strict military discipline and was very efficient in its work. In three days, hundreds of thousands of stone bullets had been stored in reserve.

Then Yang Duanhe couldn't wait to issue the order to attack the city.

Thousands of trebuchets lined up in front of the Zhao Great Wall layer by layer amid the sound of drums.

Of course, these trebuchets are all a hundred steps away from the Zhao Great Wall.

Now Pang Nuan, who was standing on the top of the city, couldn't understand.

"What tricks does the Qin army do?"

"You actually deployed the trebuchet a hundred steps away?"

General Xuchang laughed.

"General, the Qin army must be afraid of our counterattack, so they deployed the trebuchets a hundred steps away!"

"They never thought that if we couldn't hit them, how could they..."

Xuchang's expression changed before he finished speaking.

Because the Qin army's position had already made a "crunching" sound, and then thousands of stone bullets rose into the air and headed straight for Zhao's Great Wall.

Looking at the height and speed of the stone projectile, it was definitely not as simple as being unable to hit Zhao Changcheng.

really……

The next second, there was only a "boom" sound, and thousands of stone bullets hit the Great Wall almost at the same time.

The Great Wall was shaken like an earthquake.

Accompanied by flying stone debris and the screams of soldiers.

Pang Nuan can be considered a veteran with determination, but when faced with this situation, he was still shocked and speechless.

"Such a long range, and such accuracy!"

"Wouldn't this mean that Zhao Jun has no power to fight back?"

“How can we protect this Great Wall?”

In fact, not only Pang Nuan, but other Zhao soldiers including Xuchang also thought of this.

So everyone panicked and lost all morale.

On the other hand, the Qin army burst into cheers.

It's great to have the advantage of "I can hit the enemy, the enemy can't hit me".

Because it means complete safety.

Means easy victory.

It also means the crushing of strength!

As the saying goes, "laymen watch the excitement, experts watch the door."

For soldiers it's just pure fun.

But for an experienced craftsman like Chen Wei, the shock of the trebuchet and Shen Bing's understanding rose to another level.

By the way, Chen Wei was able to achieve the position of a mischievous man only because of his true ability.

He was a well-known craftsman before he joined the "gunnership" of the Qin Army.

He also inherited the fourth-level title of "Bugen" from his father.

The so-called "no change" means that starting from this level of title, you don't have to serve in the rotation.

However, Chen Wei set an example and still served as usual on the front line making ordnance for the Qin army.

And because of his skillful craftsmanship, he is quite popular and reused.

However, at this time, he looked very ugly as he watched stone bullets hitting Zhao Jun's Great Wall.

"What the hell is going on?"

"A few days ago, that guy Shen Bing had to adjust the position of the trebuchet back and forth to ensure accuracy!"

"When the battle starts today, you can hit the target neatly without adjusting your position?"

"How can I maintain my reputation as the 'number one gunner' in the future?"

…

No wonder Chen Wei couldn't understand, because what Shen Bing adjusted this time was the counterweight.

The trebuchet standing in the front row has a smaller counterweight, the one in the back row has a heavier counterweight, and the one in the back row has an even bigger counterweight.

Therefore, although all trebuchets are located at different distances.

But the stone projectiles they fired could hit the same target: the enemy's Great Wall.

Of course, what about "parabola", "acceleration of gravity", "Newton's three laws", etc.

Shen Bing will not discuss these things.

This may be basic knowledge to modern people, but to ancient people who have barely studied mathematics or physics, it is a wordless bible.

Shen Bing turned his attention to Yang Duanhe, who was standing on the general stage to command.

As long as Yang Duanhe is not a fool, Shen Bing will not be easily exposed to Bing Duan in the future.

Or casually kill Shen Bing.

Is Yang Duanhe a fool?

Obviously not!
To be continued...