Twenty miles north of Liaodong City, there is a small valley, where the earth-shattering thunder made by black powder happened to explode.

Black powder is definitely a secret weapon, although the earth-shattering thunder made of black powder is actually more lethal than the twisting chuáng crossbow, and it may not be much higher.

But the most powerful thing about this thing is the sound and light effect, which is absolutely shocking for people from a thousand years ago.

Especially if it is used for ambushes, night raids and other battles, the sudden earth-shattering sound can definitely break the morale of the enemy's army, and even the almost army may collapse directly.

When Chen Kefu rushed to the small valley with his guards, more than 100 battalion-level generals had already arrived. Everyone doesn't know what they're doing here until they come.

The small valley is not big, but it is just right for a stealthy test explosion, so you don't have to worry about this secret weapon being known in advance. As soon as they entered the valley, the men and horses of the Marshal's Guard and the Gendarmerie Division immediately sealed off the entire valley, and it was impossible for anyone to approach it.

Under the gaze of the Bailai generals, Zhang Jin, the head of the guard battalion, personally held a clay pot and walked a hundred steps away from everyone, put it directly on the ground, and then inserted the fuse into the clay pot.

"Dashuai, are you ready, do you want to light the fire?"

Chen Kefu looked at the distance, a hundred steps away, it should be no problem, but for the sake of safety, he still said to everyone, "Everyone take another fifty steps back, Zhang Jin, after you light the line of fire in a while, immediately run back to this side, do you hear?" Zhang Jin said casually, "I know." "One hundred and fifty steps, this distance is already far away from the clay pot, and the clay pot is only a black spot in the eyes of everyone. Everyone also understood at this time that this clay pot was filled with the earth-shattering thunder that the marshal said. Everyone is full of curiosity and expectation about this thing, wanting to see with their own eyes how this small clay pot can make earth-shattering thunder and be used to kill people.

Without waiting for Zhang Jin to start igniting, Chen Kefu stretched out his hands, covered his ears tightly, and said to the generals, "I suggest that you also cover your ears, otherwise, it will definitely scare you for a while." Except for Mao Bo and a few other scribes from Chenjiazhuang, they raised their hands to cover their ears, and the rest of the generals didn't care. They didn't believe it could scare them if they were so far away.

Zhang Jin took out the fire fold and lit the fuse, and as soon as the fuse caught fire, a burst of smoke came out, making a sizzling sound, and burned at a very fast speed. Zhang Jin was originally a little unimpressed, but he was also shocked to see that the fuse wrapped in black powder burned so quickly.

Busy began to dial tuǐ and ran towards Chen Kefu and them, fortunately, this time it was a test explosion, for safety and other reasons, Chen Kefu made this fuse is long. The fuse burns very quickly, burning about a centimeter per second. The fuse of Zhang's length, that is, about 300 seconds, is enough for five minutes.

When Zhang Jin ran one hundred and fifty steps with all his strength and returned to Chen Kefu and the others, the fuse was still burning. Seeing that the line of fire was still burning, but he ran back in such an embarrassment just now, Zhang Jin felt faceless.

I laughed a few times at everyone, and just wanted to say something more to get back face, when suddenly there was a muffled thunder on the ground, and I only heard a "bang", and suddenly a burst of fire flashed at the one hundred and fifty zhang place, and a burst of smoke rose into the sky.

Although they were one hundred and fifty paces away, everyone was startled by the sudden loud noise. At this time, the generals understood why the marshal asked them to cover their ears.

Chen Kefu ran to the explosion point to watch with some jī moves, he had also tried to explode a few times before, but the formula was different each time, and most of the power was not very great. The current recipe was one of the most powerful, and he drenched the black powder and dried it into pellets at the end. Ten catties of the best ratio of granular black powder, this power made Chen Kefu himself a little surprised.

The clay pot had already been torn apart, and the broken fragments were scattered in all directions, and the farthest ones flew three feet away. The open space where the pots were placed was dug out of the flat ground with a hole nearly two feet deep and three feet wide.

"Dashuai, this is the Dan you are talking about?" Deputy Marshal General Li Benlei looked at the pit on the ground in disbelief, it was just a small clay pot, and it was able to make such a big pit. As a battle-hardened veteran, he immediately understood what would happen if one of these clay pots exploded in a dense enemy formation on the battlefield. ,

If such a clay pot goes down, it will definitely kill and maim several people. Especially the fire when this thing exploded, the thunderous sound, if it exploded in the cavalry, then even a well-trained war horse would be in a panic.

This thing is so valuable, compared to those oil clay pots and fireballs when defending the city in the past, it can't be compared at all.

"That's right, this is the pill I refined, not to eat with a watch, but to kill the enemy. This thing, Ben Shuai named it Earthquake Thunder, against the Goguryeo people, it is absolutely necessary to make them startled, and if it is used well, it can also achieve great results. Yu Qinming's eyes lit up, staring at the clay pot on the ground. He believes that this is definitely a murderous weapon.

"Dashuai, is it difficult to make this earth-shattering thunder? How much can we make? Li Jie on the side also immediately asked, as the chief logistics officer in the army, he knew very well that the earth-shattering thunder in front of him was indeed a sharp weapon. But if it is difficult to make and does not reach a certain amount, it is not much different from the twisted chuáng crossbow, and it is even inferior to the twisted chuáng crossbow. Although the twisting chuáng crossbow is difficult to make, it has to be operated by one or two hundred people at a time. But the chuáng crossbow can be used for a long time, and the earth-shattering thunder in front of him is a consumable, not even as good as ordinary feather arrows. The feather arrow was shot, and some of it could be recovered, and when this thing rang out, it was torn apart.

Chen Kefu smiled and said, "It's not difficult to say this thing, it's hard to say it." The one you saw just now is a ten-pound sky-shaking thunder, and the movement is very big, but the effect is still not too strong against those enemies with armor. However, we can increase the amount of gunpowder to solve this problem, and I plan to make a gunpowder bag of 20 catties each, which will be easy to carry and more powerful when the time comes. And we can also make a small amount of 30 catties, 40 catties, or even 50 catties of gunpowder packs, which will definitely surprise Goguryeo at that time. ”

Black powder was easy to make, and there was a lot of sulfur in the army, but saltpeter didn't.

Although you can get a lot of it out through the nitrate extraction method, it is a lot more troublesome. In addition, if you want to make a powerful bomb pack, you will need a huge amount of bombs in the future.

A gunpowder bag is twenty catties, and to make a thousand gunpowder packets, then at least twenty thousand catties of black powder are required. Among the best black powder formulas at the moment, saltpeter accounts for the largest proportion, a twenty pounds of gunpowder bag, calculated according to the mass ratio of 15:2:3. In a gunpowder bag, 15 pounds of saltpeter,

2 catties of sulfur and 3 catties of charcoal.

A thousand gunpowder packets, then you need "15,000 pounds of saltpeter, which is definitely a huge number." And if you really put the gunpowder packets into the war, there are not many gunpowder packs for a thousand, and in the face of a big war with more than 300,000 people on both sides, with Chen Kefu's idea, it is best to have tens of thousands of gunpowder bags.

Mao Xi thought for a while and said, "Dashuai, saltpeter is rarely found in other places except pharmacies, and even if there are pharmacies, there are very few of them." However, since Dashuai has a way to refine nitrate, from today onwards, let the people in the city collect and refine nitrate. You can get as much as you can, even if there are hundreds of gunpowder packs after the war, it can play a big role at that critical moment. ”

Chen Kefu nodded, Ye Cheng, the deputy director of the Secret Service Department behind him, and Tang Shengyun, the director of the Secret Service Department, went to the Central Plains and has not come back yet, and now the Secret Service Division is up to him. Last time, the Secret Service Department stole the Goguryeo people's battle plan from Pyongyang, which made the high-ranking members of the military very satisfied with the Secret Service Division.

As soon as he heard Da Shuai call himself, Ye Cheng hurriedly stepped forward, "Da Shuai, what are your orders?" ”

"I have an important task entrusted to your Secret Service, and let your brothers go out to get the saltpeter back in a short time. Whether it is to buy or rob, Goguryeo, Silla, Baekje, Dongying, Central Plains,

I hope you will be able to accomplish this task. If you don't have enough manpower and funds, you can go to Mao Sima to solve it.

Ye Cheng solemnly saluted, "Please rest assured, the Secret Service Department will definitely live up to expectations." ”

The first clay pot worked so well that the generals were also full of expectations for this gunpowder.

Next, Chen Kefu continued to test the explosion a few times, there were twenty catties each, thirty catties each, and the largest forty catties one clay pot. The effect of the explosion can really be regarded as shaking the ground.

A clay pot filled with forty catties of black gunpowder had a diameter of nearly four zhang destroyed by the explosion, and the crater blasted out in the center was more than three feet deep. And the horse that was specially brought and tied to the clay pot was even more directly blown up with flesh and blood, intestines through the belly, and even the entire horse's head was blown off, and the horse's blood and intestines flowed all over the ground.

For such a result, no one has the slightest doubt about this kind of handsome new name of the Heaven-shaking Thunder. Everyone is extremely looking forward to seeing these gunpowders play a greater role in the battle with the Liao people in the next time.

While letting the guards deal with the cleaning of the test site, Chen Kefu and the others were smiling and preparing to return to the city.

There was a sound of horses' hooves, and dozens of light horsemen reached the outside of the valley, and after a while, Zhang Jin came to everyone with Zhang Meng, the captain of the reconnaissance battalion.

"Report to the marshal, I am Zhang Meng, the captain of the reconnaissance battalion of the Marshal's Mansion, and the rangers from the reconnaissance battalion have reported that a group of men and horses have crossed the small Liaoshui and are heading straight for Liaodong City!"

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