His Majesty the Emperor's presence in person made the members of the Ordnance Research Department feel extremely high.

In the test site outside Der Spiegel, the roaring sound of cannon fire continued to sound, blasting away the cannon targets set up in the distance one by one, showing the power and accuracy that satisfied Luo Ji.

Just now, the metal plate three hundred meters away had been blown away with considerable precision by a shell.

At that moment, all the members of the Ordnance Research Department who were present cheered uncontrollably.

This is a new breakthrough, which proves that the cannon of their Ten Thousand Realms civilization has officially extended to three hundred meters with an effective firing range of three hundred meters while ensuring power and hit!

During the shelling test, the four metal plates that were blown away were quickly sent to Luo Ji in turn.

The surrounding members of the Ordnance Research Department led by Ye Xuan also surrounded one after another, wanting to further confirm the power of the artillery bombardment.

These metal plates, when viewed from a distance, are not very large, and when they are delivered to the eyes, they are found to be like small walls.

The metal plate that stood at a distance of 100 meters was undoubtedly the most damaged.

The entire sheet of metal has been punched through! At the same time, there are obvious cracks scattered around.

The one at 200 meters penetrated a little.

The one at two hundred and fifty meters has not been pierced, but a whole piece of metal has been twisted and deformed.

The last 300 meters were clearly the most intact, but the surface had been clearly deformed by the shells.

Exhaled a long breath, Luo Ji kicked the last piece of metal with his foot, feeling the hard touch of the feedback, there is no doubt that Luo Ji is satisfied with the power of the cannon this time.

Three hundred meters away, the metal plate can be bombarded and deformed, and the destructive power caused to the city wall is definitely considerable.

"How stable is this cannon? How much does it cost to produce? ”

Faced with Luo Ji's question, Zhao Lei, deputy director of the Ordnance Research Department, who was waiting on the side, hurriedly handed over a document in his hand respectfully.

After turning two pages, Luo Ji's brows furrowed slightly.

This cost is really not cheap, although it can be produced stably, but the production cycle is also significantly longer than the three-bow bed crossbow and return cannon.

At the same time, gunpowder and shells, which are consumables, are obviously more valuable than stone shells for heavy crossbow bolts and return guns......

To put it simply, one word, expensive!

Compare these three siege engines as firepower output side by side.

The three-bow bed crossbow undoubtedly still has an advantage in range.

And the return cannon is less advantageous, and the firing range is already half a catty and eight taels.

At the same time, the attack trajectory of the return cannon is with an obvious large arc parabola, in other words, in terms of accuracy, it is inferior to the cannon, not to mention the power......

After thinking about it again, Luo Ji called Ye Xuan over.

"How much time will it take to increase the effective range of the cannon to more than 400 meters under the premise of ensuring power and accuracy?"

Faced with this question, Ye Xuan's two willow-like thin eyebrows suddenly wrinkled.

"Well, Your Majesty, I can't say for sure."

Well, Luo Ji also knows that this kind of thing doesn't mean that he can strengthen it if he wants to.

Researchers need inspiration and find a breakthrough.

After this experiment, maybe Ye Xuan was halfway back to the city, and suddenly had a flash of inspiration, and he had an idea again.

But it is also possible that a year and a half have passed, and there has been no movement.

And Luo Ji's mood is also very complicated now, he is afraid that Ye Xuan will not be inspired, and he is afraid that Ye Xuan will suddenly have a flash of inspiration.

If he gives the order now, start mass production of cannons.

As a result, as soon as he turned his head, only two or three months later, Ye Xuan's new model came out again.

So should Luo Ji cry or laugh?

This feeling is really heartache.

Returning to the palace, Luo Ji, who was leaning on the council hall, slapped his thigh and made up his mind after struggling for a while.

"Order, tell the Ordnance Department to stop the production of return cannons and three-bow bed crossbows, as for the cannons......"

Speaking of this, Luo Ji's voice paused, he was obviously calculating the numbers in his head now.

He has the borders of the southeast, northwest, and northwest of the Ten Thousand Worlds civilization, so how can he be equipped with six cannons, right? In addition, the other cities in the border area, considering the emergency, must also be equipped with at least four cannons, and there are other cities, so it is best not to fall behind.

In addition, the cannons brought with you when you go out must also be counted......

After his skull hurt for a while, Luo Ji rubbed his eyebrows and slowly spoke......

"Wang Kai, you personally go to the Ordnance Manufacturing Department, let them go to the Research Department to get the design drawings, and start manufacturing the latest cannons from today, as for the quantity, let them build a hundred cannons first, and then talk about it, and at the same time, go to the Goblin Technology to inform them, let them study a cost-cutting version."

"Humble command!"

After Wang Kai answered, he walked quickly towards the outside of the palace.

For this batch of cannons, Luo Ji undoubtedly values them.

In order to wait for this batch of cannons, he also deliberately settled for a while.

After a few months of not seeing Luo Ji invade, John Saar's mood was not much relaxed, and the pressure on his body became stronger than before.

He knew in his heart that Luo Ji had already figured out all the information on his borders on all sides, and the other party had not made a move for a long time, so he must be preparing something.

This feeling, for the invading party, is terrible.

As thoughts flickered, John Sal gritted his teeth and made a decision......

System Hint: Europa player 'John Sal' is invading your civilization!

Luo Ji, who heard this system prompt, raised his eyebrows.

In the next second, it was already clear in my heart.

John Sal is here to touch his bottom? In other words, he wanted to see what tricks he had been doing in the past few months.

Even if you can't figure it out, it's good to add a little block to Luo Ji and distract him.

In short, I just don't want him to develop quietly.

But how could Luo Ji let him get his wish?

Just like when he invaded the dwarven civilization before, he mainly focused on collecting intelligence, and basically didn't take it seriously.

The threat posed to his borders by a tentative battle like this is extremely limited and there is nothing to be feared.

John Sal wants to fight, then let him fight.

Luo Ji, who is located in the main city, just continue to engage in his development.

Anyway, in this kind of battle, as the defender of the city, he will definitely not be able to suffer losses.

As for whether John Sal will suddenly attack with all his might?

No way! This is a cautious person, and before he figured out what Luo Ji wanted to do, he would not desperately risk losing his troops and attacking the border of the Ten Thousand Worlds Civilization!

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(End of chapter)