"Is there a problem with the underground passage?" After all, if you think about it again for practical use, there are a lot of things that need to be solved. "
By passing the ring containing the Earth Essence to Rassen, Rassen was able to use magic on a much larger scale and at a much faster speed.
So, I actually dug a hole under the ground.
but that's where the problem hits.
When I tried it, I could see a lot of interesting things.
For now, the biggest problem is the air?
"That's right. Through the lateral hole deep underground, the magic train Alphonse Balkaline passes there." So if you're digging a hole just for that reason, you probably won't be able to, but if people are riding, air is a problem. The flow of air is too muffled and you can't breathe. ”
"So, if you try to open an air hole on the ground for that purpose, water will be a problem this time." If water accumulates in the horizontal hole in the ground, the train won't run anywhere. "
"Yes, but in the first place, there's moisture in the ground." Regardless of the presence of air holes, if you want to create an underground passage, at the same time as thinking about the structure that will not flood, you have to think about the time when you come in and turn on the drainage function. "
Dig a passage under the ground and lay a track to drive the magic train Alphonse Balkaline.
This is all I have to say.
But it's not the same story as children playing on soil.
If we were to run the train, we would have to dig deeper.
For this reason, Lassen used his magic power to dig a hole and proceeded to dig a horizontal hole through it, but the longer the distance, the more difficult it became to breathe.
This is said to be due to the lack of air in the underground passage.
As expected, it was just called a hole digger, and Lassen had heard of it.
It seems that if you dig a pit to get gold or silver in the mine, some people may fall even though they were not injured.
In such cases, there is usually no air or harmful air is generated from somewhere.
As a painstaking measure, it was decided to create air holes connecting the underground passage to the ground at regular intervals.
And I tried it.
However, it was not very effective.
I made a hole deep underground and up towards the ground, but there was not a lot of air coming in.
Even though it was, the water came in.
Just because it rains, water enters the underground passage from a tube called an air hole.
There is no way we can use such a thing in this Kowloon Plain.
A flood of rivers, or a storm, would bury the underground passage in an instant.
Then it is no longer about where the train runs.
Isn't there something you can do, Master Alphonse?
"... if I just send the air, I might be able to do something about it." Maybe I could make a magic tool that would send the wind like a magic weapon with a spirit stone. But, you can't waste a spirit stone. I don't think I can use it for a meaningful underground passage and the magic train that runs through it for the first time. ”
"Well, that's for sure. In other words, there's no point in doing that. It would be much easier to maintain the tracks on the ground."
"I see. I thought about building an underground passage to keep the magic train from getting attacked, but if we do that, it would be faster and cheaper to increase the number of people guarding the train."
When I made the ring, I thought I'd be able to make an underground passage in no time.
But that doesn't seem to be the case.
In discussions with Lassen, we came to the conclusion that it would be easier to build it on the ground in the end, no matter how many times we agreed.
Maybe that's the right answer.
Now I can see why Brother Arth didn't build a tunnel.
Even that Arthur brother who made so much earth magic thought the underground aisle had too many problems to solve.
However, I think this is convenient in a sense.
"Huh? What do you mean, Lassen?" I told you there were a lot of problems with trains. "
“Oh, no, I'm sorry. The train is, but I thought it would be worth it if it wasn't.”
"Is there a way to use the underground passage other than the train?"
"Yes. You said earlier that water was coming in from the air hole tube and the underground passage would be filled with water." That's why the train can't pass. However, if it was a transverse hole through which water passes from the beginning, I thought it might be useful. "
As a hole through the water?
“Yes, I was dotted around small countries because of the disgraceful name Lassen's Great Depression. At that time, I thought about it. No matter what country you go to, when it rains, the water makes the roads in the city difficult. This Orient country has maintained a fairly good state with [Road Laying], but one step away from the road will still be flooded, and there are still many places with poor drainage. That's why I thought it would be a little easier to live in a city that could be drained if we could create a way to get rid of this kind of water underneath the city."
"Well, if you ask me, I might be." Do you think that the pipe that passes water will be built under the ground from the beginning? What do you mean, underground water? It might be a good idea to make sure that the groundwater also reaches the Glue River. "
"That's right. What do you think, Master Alphonse? As we continue to study the underground passageway where trains can pass, we'd like to try creating a spell that can make an underground water supply.”
"... well, I'll allow it, Lassen." In the meantime, I'll hang out with the magic union and ask them to study whether they can create a magic tool that sends air without a spirit stone. "
Alright, let's create an underground water spell.
I wonder if I can get the magic train Alphonse Balkaline running down the underpass for a while?
A train alone might allow you to run unattended with the function of an eye, but if you can't fix the underground passage, it's not realistic.
Meanwhile, I'll have Lassen do anything underground.
So, let's make the magic train Alphonse Balkaline on the ground for the time being.
I made it as a symbol of the emperor, so it was necessary for anyone to touch the ground.
Thus, for the time being, it was decided to build a railway line on the ground and a water pipe underground, while obtaining a tortuosity.