After giving Xuan Ye a month-long vacation, of course the follow-up research on gunpowder cannot stop here.

Luo Ji handed the formula he copied from the wall to Zhao Lei.

When the minister is so unconventional, Zhao Lei has been the deputy minister for so many years, so he is obviously very stable in his work.

It was obviously impossible for this gunpowder formula to be put into production immediately.

Although the power of the explosion has been seen once.

But if you want to deploy it in large quantities, you need more detailed data and a stable success rate.

It was unexpectedly appropriate to leave this kind of thing to Zhao Lei.

Of course, in order to avoid disturbing the public due to the occasional explosions, Luo Ji temporarily moved the testing site of the Arms Research Department outside the city.

Then time flew by, and a month later, Ye Xuan, who had been released from prison, decisively approached Luo Ji with resentment all over her.

"Your Majesty, where is my reward?"

At this, Luo Ji rolled his eyes decisively.

"The office building of the Ordnance Research Department was bombed by you and is still being rebuilt. How dare you come to me to ask for a reward?"

Upon hearing this, Xuan Ye's face clearly showed a hint of guilt.

Then he shook his head vigorously and started to act silly.

"I don't care! Your Majesty, you said that as long as I research the formula of gunpowder, you will give me new weapon designs! I have researched it now, give it to me, give it to me, give it to me..."

Looking at Ye Xuan standing below, barely rolling on the ground, Luo Ji suddenly felt his head hurt a little.

At the same time, during the one-month long vacation for Ye Xuan, under Zhao Lei's full supervision, the stable formula of gunpowder was indeed worked out.

In the current situation, the research on weapons and equipment should be quickly followed up.

Thinking of this, Luo Ji sighed heavily.

Then he took out a thick stack of design drawings that he had prepared long ago.

This stack of design drawings is exactly the design drawing of the gold-level rock-shooting cannon that he opened the gold treasure chest before.

When Xuan Ye saw the design drawing, she was like a cat that smelled fishy smell, both eyes were shining, and she rushed up to take away the design drawing.

Thanks to Luo Ji's quick eyesight and quick hands, he quickly raised the blueprint in his hand above his head. While avoiding Ye Xuan's grasp, he said with a smile on his face...

"Let's make an agreement first. If you cause any trouble this time, I will give you a three-month vacation. Do you understand?"

Listening to Luo Ji's words about the three-month 'long vacation', Xuan Ye's whole little face suddenly turned pale.

"Your Majesty, are you a devil?"

"Did you hear that?"

"Well, I heard it."

"take it."

As he spoke, Luo Ji handed the stack of design drawings he held to Ye Xuan.

Xuan Ye, who took the design drawings, naturally started to look through them on the spot.

On the design drawing, the shape of the stone cannon was undoubtedly novel to her.

After flipping through two pages, Xuan Ye couldn't help but ask...

"Your Majesty, is this an upgraded version of the bed crossbow?"

Luo Ji raised his eyebrows slightly when he heard this. Fortunately, Ye Xuan could see the shadow of the crossbow on the rock cannon.

However, this statement is not entirely correct.

"If I have to say it, it should be a weapon that combines the characteristics of a bed crossbow and a catapult."

The positioning of crossbows and catapults is equivalent to ancient siege cannons.

The characteristic of bed crossbow is penetrating power.

The characteristic of the catapult is the destructive power of blunt blows.

The cannon, however, combines these two characteristics at the same time.

However, Luo Ji didn't have high expectations at all for the stone-shooting cannon.

At best, this is the key that allows his civilization of all realms to step into the threshold of "firearms".

It has been said before that the range of the stone-shooting cannon is not as good as that of the three-bow crossbow and the returning cannon.

At the same time, the accuracy is quite poor.

Instead of mass-producing stone-shooting cannons, it would be better for him to continue to use three-bow crossbows and returning cannons.

But after that, Luo Ji quickly figured out something.

What he drew out was indeed the design drawing of a stone-shooting cannon.

But there is no rule that he can only build stone cannons!

He is a modern man, so why can't he improve on this basis?

Early cannons were collectively called smoothbore cannons.

The name comes from the fact that the inside of the barrel is smooth.

Stone-shooting cannons are obviously also classified into the category of smoothbore cannons.

The common problem of smoothbore guns is that they have short range and poor accuracy.

But Luo Ji can improve on this point.

Using the design drawing of the stone-shooting cannon as a blueprint, wouldn't it be enough to directly improve it into a rifled cannon?

The biggest feature of a rifled gun is the rifling engraved on the inside of the barrel.

Therefore, when the cannon fires, the flying shells will rotate and advance along the trajectory of the inner rifling.

This allows the unstable cannonball to achieve stable flight.

At the same time, the range and accuracy of the cannon are significantly improved!

Of course, if you want to manufacture the barrel of a rifled gun, you have very high requirements for manufacturing technology and technical capabilities.

There is also the structure of the entire gun body. Due to the change in the firing method, the entire structure also has to be modified.

But Luo Ji was fearless. He had the technological power of both humans and goblins, as well as Ye Xuan, a top weapons master.

Can this thing still trouble him?

As his thoughts whirled, Luo Ji directly referred to the design drawings and gave Ye Xuan a simple explanation.

"This part is called the barrel, which is the cannonball, and the part inside is used to fill the gunpowder."

"But on this design drawing, I missed something before. The internal design of the barrel will cause the accuracy and range of the artillery shell to become too poor, so..."

While speaking, Luo Ji quickly took out a design drawing from his desk.

That design drawing was obviously drawn by Luo Ji himself. The main content was the internal structure of the rifled gun, as well as some of his ideas for transforming the overall structure.

However, the structural design drawing of the cannon is sensitive information after all, and there is not much information that can be found. To reach this point, he has obviously tried his best. Can he make a rifled cannon with the limited information and ideas he provided?

This depends on the ability of Ye Xuan, the weapons master.

Xuan Ye took the design drawing and quickly looked through it.

"I see, if such a trajectory is made on the inside of the barrel part in advance, the cannonball will naturally rotate along these trajectories when it flies out, and the high-speed rotating cannonball can become more stable."

While speaking, Xuan Ye, who looked excited, couldn't help but stretched out her hand to make gestures.

"This seems to be a very simple design, but it can effectively increase the range and accuracy of artillery shells. Your Majesty, you are really amazing, you can actually come up with such a design!"

"..."

"But I think if we want to do this, the shape of the cannonball should also be slightly changed. It is best to have corresponding trajectories on the surface, so that the effect can be better. How about a tapered one?"

"..."

"There is something wrong with this structure here, Your Majesty, what do you think?"

"..."

Horrible, is this the difference between top geniuses and ordinary people?

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Chapter completed!