Dungeons for the Devil, Dungeons for the Core

I was hoping for a little, but it was just impossible to build a shell with alchemy. So I made full use of dungeon magic to form the shell, but getting rid of bends and distortions was quite a hassle until I got used to it.

An injection experiment was performed by creating a small caliber cannon for the test, but the problem was quickly faced.

"You can't just demon stone after all..."

In the first place, a cannon is a weapon that fires shells at high initial speeds by pressure when the gas produced by combustion expands rapidly. Therefore, without a rapidly expanding gas, and without the presence of gunpowder that produces that gas, it is impossible to achieve the cannon. Demon Stone has only the ability to simply emit thermal energy. The air heated in the shell body alone did not yield enough inflation pressure to fly the shell.

"In the world of masters, how were you?

"I was using something called gunpowder. That's a rapidly burning and gassing substance. It was used in fireworks, too."

"Can't you make that?

"If it's a simple black powder, you can make it with nitrous stones, sulfur, and charcoal. It's troublesome to collect a sufficient amount of raw materials, and it's relatively easy to formulate, so if they find out about the raw materials, they might make gunpowder as well. Or is there gunpowder in this world?

Unfortunately - can I say - there's still no gunpowder in this world. But Grandpa told me that he had a sense of substitutes.

"The point is, should we burn up rapidly and become smoke? There's a plant monster called Fire Magic Killer."

They have monsters who hate them in the name of fire magic killers because if they accidentally attack with fire magic, they will be blown away by a blast. For experimental purposes, I just need a bottle of branches, so why don't I cut it off? There will be some growing in the dungeon.

I got a bit of a fire magic kill to try it out and tried using something processed into powder but it seems closer to cotton gunpowder than black gunpowder. The combustion characteristics are also suitable for loading, and you can use this. If you do well with alchemy, you might be able to synthesize smokeless gunpowder based on this. Do you want to try it when you run out of power? But let's keep using it this time.

Based on the combustion characteristics of the fire magic killing used to load the drug, the structure of the cannon such as the shell length will be determined. Dragon extermination is the main objective this time around. Engagement distance will be shorter. Direct aim is fine, but I want to ask for rapidity.

The power of the cannon, but we need it at least as much as last time. In the last Dragon Intercept, Earth - maybe not, but either way, I changed the rotational speed of this planet to the energy of the ejection. Approximately 470 meters in seconds. We will need an initial speed equal to or greater than this. Return to the apartment to fish for materials on the Internet. Shall I refer to this because the initial speed of the German army's 75 mm tank cannon is 385 metres per second in the case of twenty-four calibres and 740 metres per second in the case of forty-three calibres? But if you're a dragon opponent, seventy-five millimeters won't work with a bean cannon. I need a large caliber cannon, but will it be as big or slightly bigger than the last one? In order to reduce development time, shells should be merely spherical, and rifle artillery should be dropped off.

Test fire in the desert in the "labyrinth of quicksand" to avoid being heard by outsiders. "The Labyrinth Without Return" is too small to do it. The shells devoured deep into the sand as they fired towards the target replacement sand mountain.

"It's impeccable... powerful..."

'No, you can't. Every time I shoot with a recoil of fire, the cannon seat is retracted. This will not keep accurate aim, and it will not be possible to fire continuously whichever way it is being returned to its original position. We need to develop an exit plane. "

"Drop-off aircraft......?

'Oh, the mechanism is to try to retract only the cannon body to absorb the recoil of the firing and not retract the position of the cannon itself. And then we need to make it rear-mounted and reduce the loading time. In order to do so, we must also establish measures to combat gas leaks. There's a lot to do, but it's easy to do for what you're seeing the goal.'

All the troublesome things like turning the cannon seat, adjusting the elevation, aiming, and reloading threw round at the dungeon's ability, but once the one with its function as a fortress cannon came up. I saw that - no, I've been intrigued since it was being developed - but Romulus and Remus ate tremendously and said they wanted to deploy it to their own labyrinth as well. I don't know how you feel, but you can't use it in the dungeon, can you?

"For once, I'd also like to assume if the big army were to push over."

"Cannons are ideal for reducing the number of enemy soldiers before approaching."

"I watched the production process, so if it's the same, I can make it."

If you're going to build it yourself, there's no difference as far as I'm concerned. Thus, all three of our dungeons were to have twenty centimetre fortress guns. Then he also thought about his opponents other than the dragons - such as infantry in dense formation - and made what he called "grape bullets" as well. It's a little more efficient than running a series of rock valets.

It should be noted that the fire magic killing was determined to be cultivated within each dungeon.

Pitfalls should have been easier, but problems still arose. The biggest problem was in saying that the actuation test could not be done.

'Cause it's like the first time a dragon steps through and falls...'

'You can't experiment without a dragon...'

There are unexpected things going on everywhere.

'In the meantime, let's make sure that the opening of the pit can be controlled even on the dungeon side. You can open it when the dragon put its foot on the lid.'

'Then... don't move... the worst thing that can happen... will be avoided'

'Oh, usually you should just keep the lid of the pit locked for safety and unlock it only in time of war'

By the time the autumn breeze began to smudge itself, there were various excessive twists and turns, but for the time being, the first Crevasse Dungeon defense enhancement plan was achieved.

I don't think you're overdressed, but I wouldn't weigh in to protect my kids. It's too late to regret it. You'd say, "I feed a hundred-year-old soldier because I don't use it all day," right? I need a hundred years' worth of prep for a busy day.