Firearms Cao Shen Machine Workshop.

Gao Jiangtou and Zhang Yi looked at the new drawings brought by King De together.

"Lord, what is this?"

Zhang Yi stared at the drawings for some reason.

"Hehe, this is a heavy weapon, a rocket launcher."

Li Yu pointed to the drawings and explained.

"Using gunpowder as the driving force, the rocket is launched, and when it reaches the enemy, it explodes."

"It's kind of like our Thundercar."

"You're right, the grenades fired by the mine car are still a little close."

Zhang Yi and Gao Jiangtou opened their mouths wide, and said in their hearts that the launch distance of the thunder car is still close? It's all over 600 steps.

"The launch distance of this rocket launcher should be at least more than 1,500 steps."

"Huh? Fifteen hundred steps? ”

The distance was unbelievable to them, they had never heard of anything that could be launched at such a distance.

At this distance, Li Yu is not far enough.

Let's do the experiment.

So the core craftsmen of the Shenji Workshop and the Wood Workshop began to make the launch vehicle according to Li Yu's requirements.

Actually, the car is easy to make, which is not the core.

The most central thing is the launcher and the rocket.

Iron pipes are needed for this launcher.

Iron pipes can also be made, but iron pipes that are two zhang long and one foot thick are rare.

Ten such canisters are needed for one launcher, five in a row, in two rows up and down.

The Shenji Workshop has been busy pouring iron cylinders in the past few days, and dozens of experiments have failed.

The main thing is that there are cracks.

Li Yu went to the site to visit their scrap products, found the master craftsman and said: "Master craftsman, can you cast two short cylinders and then connect them together?" ”

The master craftsman pondered for a while, so he could only try.

There were no cracks in the short barrel, and welding was not a problem.

The short cylinder interface is burned red on the butt, poured with red molten iron, and it is welded.

The main reason is that the solder joints at the welding place in the pipe are not easy to handle.

After several experiments, I finally came up with a solution.

While the solder joints are not yet fully solidified, clean and beat the tube with a tool, and then grind it smooth.

But there are still flaws.

"Try this."

Li Yu asked them to fill the two short cylinders with sand, pour iron juice, and then pour out the sand and smooth the joints.

This effect is really good, although there is no guarantee of complete flatness, but it is no big deal.

The woodmill makes a wooden cylinder that is two zhang long and nine inches and eight thick, which is simple for the carpenter, and the wooden cylinder is dried for later use.

Make a slightly smaller cloth bag, fill it with gunpowder, and stuff the bag into a wooden cylinder.

An iron warhead is installed at one end of the barrel, which is the same as the grenade body, which is filled with explosives and leaves a fuse position, and the fuse extends into the gunpowder cloth bag of the wooden barrel.

In order to ensure the entry of air in the wooden cylinder, several small holes were drilled in the barrel.

A rocket was made first, and Li Yu took the craftsmen to the outside of the city to experiment.

The rocket was inserted into an iron cylinder, which was tied to a wooden shelf.

"Ready, light."

The guards lit the fuse of the rocket with torches.

With the sneering green smoke spraying, Li Yu's heart lifted.

Laugh at~~~~

Rumble~~~~

Airplanes~~~~

After a burst of smoke came out of the tail of the rocket, the fire flashed, and the rocket more than two feet long rose into the sky.

A swaying arc was drawn through the air, flying into the distance.

After a dozen breaths, in the long distance, a large cloud of black smoke rose up, a deafening explosion was heard, and the ground under his feet shook.

Looking at the launch wooden frame, it was about to fall apart because of the recoil force of the rocket.

"Let's go, let's see."

A group of people followed Li Yu and ran forward.

More than 2,000 steps away, a pit more than a foot wide appeared in front of him, and there was a strong smell of gunpowder wafting around.

The surrounding vegetation was swept down by shrapnel, and the broken branches and trees were scattered everywhere.

"This, this is considered a success?"

Zhang Yi and the master asked suspiciously.

"It's a preliminary success."

Seeing that Li Yu was not very satisfied, the corners of Zhang Yi's mouth twitched, and he said in his heart, "Immortal, don't be dissatisfied, look at how far this is?" I was panting when I ran.

With the experience of this rocket, the people of Mufang made more than a dozen identical rockets in a row, making different adjustments in some sizes and center of gravity.

The weight and length of the warhead and the weight and length of the barrel were tested several times.

The four-wheeled carriage is a reinforced carriage, and the beams, axles, and wheels are all thickened hard jujube wood. There are also folding support columns at the front and rear of the carriage to increase the stability of the carriage.

An iron launcher was mounted on a wagon, on which the elevation angle could be adjusted.

The carriage was not lightweight, and it took four horses to pull it with ten rockets.

When the first complete rocket launcher was completed, it was dragged by four horses to the outside of Nanyang City.

Launch experiments to the east at the water's edge in the east of the city. Unload the horses first, pull them to a hundred feet away and wait.

The fuse lengths of these ten two-row rockets varied.

This is determined by the order in which the launches are launched.

The first rocket launched had the shortest fuse, followed by its diagonal rocket.

If the first launch is the first one on the left of the first row, then the second launch is the first one on the right of the second row, which is to balance the force of the rocket launch, so that the launch vehicle will not overturn, and the force will be even.

The fuses of the ten rockets are eventually tied together, and all launches can be completed with a single ignition.

"Ready, light!"

At a command, the guard stepped forward and lit the fuse with a torch, then dropped the torch and ran.

Everyone stared at the snorting and smoking launch vehicle.

Laugh at~

Rumble~

Sou~

With a flash of firelight, the launcher jerked backwards, and a flash of fire streaked across the sky and flew towards the east.

Laugh at~

Rumble~

Sou~

Another flash of fire flashed, and a black shadow broke through the shackles of the launch vehicle, chasing the previous one away.

Thundered~~~~

A cloud of black smoke rose in the distance, a great earthquake trembled, and the sound of an explosion was deafening.

Laugh at~

Rumble~

Sou~

The fire flashed again, chasing the green smoke in front of him, and the black shadow also shot away.

Thundered~~~

Thundered~~~

Laugh at~

Rumble~

Sou~

Thundered~~

Thundered~~

Everyone was trembling with fear from this devastating thunderstorm, their faces were numb, and they stupidly watched the launch vehicle surrounded by thick smoke, and finally they couldn't see anything clearly.

I don't know how long it took, maybe it was a long time, maybe it was a moment.

The world was silent, and even the birds that usually chirped were gone.

It took a long time for everyone to wake up.

Looking at the launch vehicle with thick smoke billowing out, everyone present had palpitations, and the awe in their hearts arose. God-man, you really destroy the world with a wave of your hand, you can't believe it!

When Li Yu saw that the launch was over, he ran in the direction of the launch vehicle, but was hugged by the guards.

"My lord."

"It's okay, the launch is over, there's no danger."

Where did the guards dare to let him go, and they held on to it.

Li Yu had no choice but to wait for the smoke to dissipate, and then approached the launch vehicle with everyone.

The cartridge was still hot, and the ground at the rear of the wagon had been knocked out of a large crater.

It looks like you have to make an iron plate. It can both increase the thrust of the rocket and protect the carriage and the ground.

Some people looked at the horses a hundred feet away, and admired in their hearts, His Highness is really a god, he has already calculated the power of the rocket, and pulled the horses away early, otherwise I am afraid that I will eat roast horse meat.

Follow the direction in which the rocket was launched and see how it goes.

As a result, he found ten large pits three thousand steps away, as if a giant beast had eaten the ground, and the grass and trees within a hundred feet around him were in ruins, and there were still traces of burning.

"Hurry up production, at least ten launch vehicles must be produced, and rockets should be produced separately."

"Yes."

At the beginning of September, Nanyang entered the autumn harvest season.

Firearms Cao was busy producing rocket cars and rockets.

According to Li Yu's instructions, each launch vehicle should have 30 bombs, which is a standard base number.

Zhao Kuangning and Zhao Kuangming sent a letter stating that they had already reorganized their armies for war, and that they would be able to enter Beijing after the autumn harvest when they had prepared grain and grass.

During this period, Li Yu received a letter from Wang Shifan.

Since last year, he listened to Li Yu's advice and insisted on defending the city and fighting, forcing Yang Shihou and Zhu Quanzhong to be unable to do so, and finally retreated from the army due to lack of food and grass.

After the autumn harvest this year, Zhu Quanzhong will definitely come to attack, although he can still defend the city, but he will be beaten passively and his morale will decline.

Li Yu convened the civil and military forces to discuss countermeasures.

He put down the secret report in his hand and asked, "There is a secret report, Zhu Quanzhong is preparing for war, and Wang Shifan also sent a letter to ask for advice, what do you think?" ”

Zhou Kuan came out of the class and said: "Lord, Wang Shifan is far away from Nanyang, we can't save the fire from far water, and we can do the plan of encircling Wei to save Zhao." ”

Zhang Ge said: "My lord, the words of the long history are very true. ”

"You can contact Li Keyong's department and Yang Xing's secret department, and make him uncomfortable."

Looking at his civil and military affairs, Li Yu obviously felt that there was a shortage of talents.

"Rearmament for war."

"Reply to Wang Shifan, I have implemented the plan to encircle Wei and save Zhao, so that he can hold on to it with peace of mind, and when there is an opportunity, I will send troops to Bianzhou."

Nanyang set a strategy of life and death in the autumn harvest.