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Page 410

At that time, all of them will be destroyed, and all will be destroyed.

So Cheng Yu had to defend the city, even if it was only until tomorrow.

So Cheng Yu rejoiced in his heart, glad that the enemy had a huge plan and attacked Seoul first, instead of besieging Tian Feng, Man Chong and others with an army of 30.

Otherwise, no Han army can stop it.

The battle at the North Gate is still fierce!

The bed crossbow continued to fire, and a crossbow arrow was shot into the Goguryeo army. The Han army on the city was also shot and injured, and then they were carried down by civilian husbands for treatment.

Stones, wood, arrows, and fish oil were also continuously transported up by the peasants.

The Goguryeo people who kept climbing up and the spearmen and swordsmen of the Han army fought on the top of the city.

The north gate is fine, there is Xu Chu, and he led his personal guards to kill the Goguryeo people in the upper city again and again. Several times, the Goguryeo people rushed to several generals, but they were still hacked to death by him. Throw it into the city and use it as a weapon.

A ladder was pushed down and fell down, and the Goguryeo people lifted it up and put it on the wall again and again.

An hour and a half passed, and the other three sects also tried their best to hold on, holding on to the top of the city.

However, the consumption of fish oil is huge.

Because the people of these three sects felt that they couldn't bear it anymore, they would push the oil barrel down the city, and the oil barrel smashed down the city, and it was torn apart, and countless fish oil rolled out.

Then the city defenders fired rockets, ignited the city, formed a sea of ​​flames, interrupted the attacking Goguryeo people, disrupted their siege rhythm, and then organized troops to clean up the Goguryeo soldiers who climbed up.

Relying on this method, they kept the top of the city time and time again.

But the result of this is that the fish oil shipped from Weiyuan Island and Donglai is almost exhausted.

Fish oil is a strategically scarce material.

Because Xu Ding's territory is basically close to the sea, he makes a living from fishing and hunting, so Weiyuan Island has caught a lot of sea fish, and then stored a large amount of fish oil from them.

Of course, these fish oils are not refined for consumption, so the extraction is relatively easy, which is relatively easier than using tea oil and tung oil.

But once the war started, it couldn't resist such a large-scale consumption!

It doesn't hurt for the son to sell his grandfather, Cheng Yu is probably slandering these bastards in his heart.

It doesn't matter if the fish oil is gone, just keep the city.

Looking at the sky, it was still some time before dark, he gritted his teeth and said: "Notify the three city gates, you can reduce the use of fish oil, increase the use of bed crossbow sorties, and... use the trebuchet !"

That's right, there is also a sharp weapon in the city to defend and attack the city.

Trebuchet!

This was also what Cheng Yu asked Weiyuan's craftsmen to do before Cheng Yu's arrival. Some of them could barely be regarded as Huang Chengyan's apprentices. The young ones were selected to go to Donglai Academy or learned mechanical knowledge from Huang Chengyan's side.

Then he followed Huang Yueying to make a few trebuchets.

After getting familiar with the process, he returned to the Machinery Department.

Then he followed Cheng Yu to Seoul.

After arriving in Seoul, they have been quietly arranged to be protected by the army and secretly build trebuchets.

So even the traitor Yang Dengzhi didn't know about it. After all, the construction of the bed crossbow was open to the public, and the attention of Yang Dengzhi and others was drawn here.

Who would have thought that Cheng Yu secretly made a trebuchet.

You must know that even the big man now, few people know the offensive and defensive equipment such as the trebuchet.

Most people have long forgotten this long-range offensive and defensive equipment that once originated in the Warring States Period.

Not only did the other three cities immediately launch the last sharp weapon to defend the city, Cheng Yu also pushed out the trebuchet here, and even lifted one from the gate tower.

That's right, the parts were disassembled and shipped up, and then assembled in the gatehouse.

Rows of trebuchets on the open space in the inner city were also placed and moved as far forward as possible.

After all, the range of this thing is not too far.

30公斤的石弹为例射程约140-210米，100公斤为例石弹射程约40-70米。

But this is before the general improvement.

These catapults in Seoul are made of machine steel produced in Weiyuan Island for center of gravity stability, and other mechanisms also use a lot of parts that are more beneficial than the original catapults to increase the range.

So the range has increased by ten to fifteen percent.

It seems to have increased by an average of more than ten meters, but the lethality and effect are astonishing.

I saw that each trebuchet was loaded with stone bombs.

Following the commander's shout, he waved the flag.

Four or five big men pulled the rope vigorously together.

The linkage drives the other end, and uses the original force of the rod to shoot out the stone belt in the groove.

A dozen or so stone bullets flew from the top of the city wall and fell to the outside of the city.

The Goguryeo soldiers who were charging inadvertently raised their heads and found dozens of black spots flying towards them.

Haven't figured out the situation yet.

There was a whistling sound above the head, and then the ground shook, and a group of people fell down on the body behind him, or forward.

Some people were directly smashed into flesh, and some had their arms or feet broken.

The effect is very good, much more powerful than the bed crossbow. Each arrow of the bed crossbow can kill at most three or four people, and most of them interrupt the rhythm of attack by deterring the enemy.

But the trebuchet, the stone bullets that fly past, is a one-piece kill. If one hits and continues to roll, it will injure one piece until all the inertial kinetic energy is released.

It can be said that its staying power is longer, but the disadvantage is also obvious, it has no clear goal.

Even if it is the same plane, the impact point of each shot is not fixed.

Very casual.

"put!"

The trebuchet placed on the city was also thrown out. This trebuchet was stepped on by manpower, which can be used to adjust the range according to the number of people. Generally, four people stepped on it at the same time, using the power of their feet. Carry out linkage amplification and transmission to the rod, and use the original strength of the rod to project the stone bullet.

The accuracy of this trebuchet is relatively high, and the overall height is relatively low, which is suitable for use in places with narrow distances like the city wall.