The catapults from Zuoweiying have been deployed above the city wall, but because the place is small, all fifty or sixty catapults cannot be deployed at the city wall, and only more than twenty can be deployed at one time.

However, twenty catapults were enough to deal with Sima Jun’s catapults.

Seeing that the catapults under the city were nervously placing and loading bullets, Qian Hong sneered slightly and ordered the catapult drivers in the city to load and carry out a pre-emptive strike.

After the catapult cart is installed, it has entered a state of combat. At this time, you only need to load the stone bullets and you can fire it.

In the past, the stone casting chariots were used in siege combat, but this time it was supposed to be a battle to defend the city. Obviously, throwing stone bombs when siege is completely different from throwing stone bombs when defending the city. When siege, the method is to attack upwards and attack from bottom to top, while when defending the city, the method is to attack downwards, condescending from top to bottom.

However, for stone-cattering drivers, this is not a difficult task. Just adjust the ballistics. Moreover, there are a large number of people under the city. Each stone bullet does not need to be aimed too much. If it is smashed, it can hurt people.

The Sima Jun under the city was still busy and nervously. The person who installed the stone trench was sweating profusely. The soldiers carrying the stone bullets were loading the stone bullets.

Sima Jun's stone bullets were not carefully carved into a spherical shape like the Bingzhou Army. Instead, they used rough stones of rough size. These stones were varied, spherical, square, and more irregular shapes. Sima Jun only needed to weigh about the same weight when mining quarries, and basically did not care about the shape.

In their opinion, it was a purely unnecessary thing to chisel the stones into a ball of the same size, whether it was a stone ball or a stone, as long as the weight was the same, the damage caused should be no difference.

But in fact, there are still many differences. The reason why Cao Liang spent a lot of effort to let craftsmen chisel the stone bullet into a ball, from an aerodynamic point of view, can reduce the resistance of the air and improve the stability of the rock bullet's flight. If irregular stones roll in the air, the ballistics will change and the hit rate will be significantly reduced.

The spherical stone bullet perfectly avoids this problem. No matter how the stone bullet rolls in the air, it will not affect the ballistics, which can greatly improve the hit rate.

Obviously, others would not know this principle, so in order to save trouble, the stone bullets of the Wei army have always been irregular stones, and there will be no exception at this time.

Just as Sima Jun was busy, the stone bullets on the top of the city were already roaring, drawing arcs in the air, and then hit Sima Jun's head.

When attacking upward, the front end of this arc is long and the back end is short. When attacking downward, the front end is short and the back end is long. The entire throwing process is that it converts kinetic energy into potential energy. The front end of the arc uses kinetic energy. After reaching the peak, it is converted into potential energy. Under the influence of gravity, the longer the line segment at the back end, the greater the potential energy and the greater the damage caused by the stone bomb.

The Sima Army did not seem to have expected the Bingzhou Army to take action suddenly. The stone bullets flying in the air made the Sima Army panic. They tried desperately to avoid them, but the stone bullets fell too fast and hit the crowd with lightning speed.

A powerful and heavy stone bullet hit a Sima Bing's head, and its head exploded like a watermelon. Red and white things splashed everywhere, spilling all over the people around him. The air was filled with a strong smell of blood, which was disgusting.

Don’t think that killing a person is the end. After the stone bomb hit the ground, it bounced a few bullets on the ground, and then quickly rolled in the crowd for a long distance with the help of its whereabouts. Wherever it went, Sima Bing had broken bones and broken tendons, and was wailing.

Only then did Chen Tai realize that this was the biggest difference between spherical stone bullets and ordinary stone bullets. Ordinary irregular-shaped stone bullets fall there and basically will not move any further. However, these spherical stone bullets can use the momentum to roll and cause secondary damage.

Especially on ramps like in front of Jingxing Pass, stone bullets kept rolling, and wherever they went, they were either dead or injured, which could even turn the Sima army's formation. It seems that the spherical stone bullets that people did not think were really useful, and there was no time in this world.

Just one round of more than twenty stone bullets brought Sima Jun a panic in a panic. Many people ran away with their heads in their arms, and these catapults needed manpower to pull them. They fled one after another, which also made these catapults almost paralyzed.

Only a few stone trenchers on the edge did not affect them and shot out some stone bullets. However, in a hurry, the accuracy was very lacking. They either hit the city wall or landed in the city. Almost no stone bullet could hit the target on the city head.

In fact, no matter what kind of catapult is, it needs to be adjusted. Only by constantly shooting can the correct attack point be found. Even the Bingzhou Army's catapult car did not hit any catapult in the first round of attacks. It was just that the Sima Army's personnel were too dense, which caused considerable damage.

However, the catapult has extremely strong adjustment ability. After a rock bomb was tested, the pitcher had roughly determined the bounce point, so in the second round of attack, he directly aimed at the catapults to attack.

The first ones to be destroyed were those trenchers that were capable of firing stone bombs. These trenchers pose the greatest threat to the city. Although they do not have the ability to hit the stone bombs at the top of the city, they can always adjust after continuous ejection.

Of course Qian Hong would not give them a chance to adjust and ordered the pitcher to aim at these trebles to hit.

A catapult was first hit by a stone bomb. With a "crack", the entire catapult broke into a pile of rotten wood, and broken wood and wood chips flew everywhere. Such heavy stone bombs, as long as they could accurately hit the catapult, these catapults were definitely inseparable.

Chen Tai was stunned. Although the catapult was large, it was a small dot several hundred steps away. The catapult was just a small dot. The taxi of the Bingzhou Army could hit this point accurately, which was almost incredible.

At this time, Chen Tai suddenly realized that the gap between the catapult and the catapult was really not a difference between wheels or not. Such a gap was far from a small part. Sima Jun was beaten to fight against the catapult. Chen Tai wanted to use the catapult to attack the city, but it was just a fuss.
Chapter completed!