After this "seeing is true" Chen Wei had nothing to say.

To be precise, it is not "no words to say", but "incoherent" or "annoyal and embarrassed"!

"This is impossible!"

"How can we have such accurate heads?"

"This is just luck!"

...

But after Shen Bing tried repeatedly and did this several times, Chen Wei had to believe this fact and shut up.

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

Although the accuracy is still not high, it is much better than the trencher that was pulled by manpower before.

Explain with the knowledge of modern physics.

The human-powered catapult requires at least thirty people to pull it at the same time.

The position where each person stands, the size of the pulling force, the speed of the pulling time, the direction, etc.

These all determine that the force of the gun rope acting on the tip of the gun is different every time it is launched.

The different forces acting on the tip of the cannon mean that the initial velocity of the stone bullet fired is also impossible.

So the range is sometimes close and sometimes far, and it is common to miss 9 of ten shots.

Sometimes there may even be unexpected dangers.

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

Using counterweights can avoid these problems well.

Its force is certain, predictable, and calculating.

If the influence of air resistance, wind speed, wind direction and shape are ignored, it can even calculate its landing point.

So there is a higher accuracy.

This also strengthened Yang Duan and the determination to improve the catapult.

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

In fact, if it is just a catapult, tens of thousands of people will probably have tens of thousands of them after a few days of busyness.

But the more important thing about siege siege is not siege siege, but stone bombs.

If you count on firing a stone bullet in five minutes.

Then thousands of catapults will fire 24,000 stone bombs in just one hour.

It takes 280,000 stone bullets a day.

You should know that these stone bullets are not just a single stone.

In order to ensure the correct head, they must also be weighed and slightly polished.

More importantly, once the siege begins, you must attack day and night all day.

Otherwise, there may be a situation where the Qin army will attack, Zhao army will cultivate, and then there will be endless and never be able to capture the city wall.

Therefore, most of the Qin army's troops were not actually making stone catapults, but quarrying, making and carrying stone bombs.

Fortunately, the Qin army was strict in military discipline and extremely efficient in doing things, and hundreds of thousands of stone bullets were reserved in three days.

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

Thousands of trenchers were driving in front of the Zhao Great Wall layer by layer amid the drum sounds.

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

Pang Nuan, who stood on the top of the city, couldn't understand it.

"What's the point of Qin army?"

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

General Xu Chang laughed.

"General, the Qin army must be afraid that we will fight back, so we deployed the catapult to a hundred steps away!"

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

Xu Chang's expression changed before he finished speaking.

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

Judging from the height and speed of the stone bullet, it is definitely not as simple as not being able to hit Zhao Great Wall.

really……

The next second I heard a "boom" sound, and thousands of stone bombs hit the Great Wall almost at the same time.

The Great Wall is like an earthquake shaking the earth.

Accompanied by flying stone chips and the screams of soldiers.

Pang Nuan is also a determined veteran, but he is still so shocked that he can't speak in the face of this situation.

"Such a long range, and such an accurate head!"

"Will Zhao Jun have no power to fight back?"

"How can I protect this Great Wall...?"

In fact, it was not just Pang Nuan, but other Zhao troops, including Xuchang, thought of this.

So everyone was panicked and lost their morale.

On the other hand, there were bursts of cheers from the Qin army.

The advantage of being able to form "I can beat the enemy but can't beat me" is that it's cool.

Because this means complete safety.

Means an easy victory.

It also means the pressure of strength!

As the saying goes, "Asiders watch the fun, while those who are in charge look at the tricks."

It's just pure pleasure for soldiers.

But for craftsmen who are as experienced as Chen Wei, their shock at this catapult and Shen Bing's understanding has risen to another level.

By the way, Chen Wei can achieve this position as a masculine man by his true ability.

Before he entered the Qin army's "Architecture" he was a well-known craftsman.

He also inherited the fourth-level title of "not renewed" from his father.

The so-called "not changing" means that you can change the service without having to take turns from this level of knight.

But Chen Wei set an example and still served on the front line to make ordnance for the Qin army.

Because of his skillful craftsmanship, he is quite valuable to Yang Duanhe.

However, at this moment, he looked very ugly as he watched a rock bullet hit Zhao Jun Great Wall.

"Damn what's going on?"

"A few days ago, that guy Shen Bing needed to adjust the position of the catapult forward and backward to ensure accurate head!"

"As soon as the battle starts today, you can hit the target in a uniform manner without adjusting the position?"

"In the future, how can I protect my title as the 'first artillery'?"

...

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

The counterweight of the trencher standing in the front row is smaller, the counterweight of the rear row is larger, and the counterweight of the rear row is larger.

Therefore, although all the trenchers are different in distance.

But the stone bombs they fired can hit the same target: the enemy's Great Wall.

Of course, what are the "parabola", "gravity acceleration", "Newton's three laws", etc.

Shen Bing will not discuss these things.

This may be basic knowledge for modern people, but for ancient people who had hardly learned mathematics and physics, it was a wordless heavenly book.

Chen Bing turned his attention to Yang Duanhe, who was standing on the commanding stage.

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

Or you can easily kill Shen Bing.

Is Yang Duanhe a fool?

Obviously not!
To be continued...