Magi Craft Meister

After breakfast, Marcia headed to the Hermé River to conduct an experiment. Jen and Reiko are also with each other.

The purpose of this day is to determine the mounting position of the thrusters.

"I usually attach it to the stern..."

Marcia starts considering leaving the raft (how it is) on the river plain.

Given the direction stability in the flow, Marcia said the bow would be nice.

"Um, maybe it does. But..."

The forces of propulsion pushing the hull include 'size' (strength) and 'direction'.

There are also 'sizes' and 'directions' in the force with which river flows trying to flush the hull.

At this time, what happens when the 'place of strength' is off?

If the 'direction' of the force is the same, or if the 'size' is smaller, it doesn't have much impact. Because the hull is designed to be stable.

But when it comes to what happens when the "direction" of the force is the other way around and the "magnitude" is large, it "spins".

One way to prevent this is to take the mounting position of the thrusters in the direction of travel.

When it comes to towing (tractor type), most propeller type planes are this.

In contrast, the ship's screws are called propelled (pusher type).

"... but as far as I know, I've never seen a ship like that. I feel like there's some kind of pitfall."

Jen was also an amateur when he was in modern Japan, even if he had built a model ship.

Because this is a matter of fluid dynamics, it is impossible for Jen, who is not your expert, not to know.

Simply put, a towed (tractor-type) ship is because the water flow generated by the screw hits the hull, which makes it less efficient.

If this is an airplane in the air, it's not much of a problem because it has smaller physical constants such as air density and viscosity than water.

"Well, I guess there's something about Jin saying that."

"Now all I can think about is, if I use a screw, I feel that the current will hit the hull. That's resistance, isn't it?

But Jen, due to his experience and taste, was almost right.

"Sure. Considering the premise of shallowing the position of the screw so as not to rub it into the bottom of the river, the water flow created by the screw does hit the hull."

Marcia also understood the disadvantages in that case with an imagination backed by experience.

"Yeah, all of a sudden I'm stuck"

Marcia held her head.

"Uh... I'm sorry about that"

Jen apologized to Marcia when she realized she had wasted money first thing in the morning.

"No, gin isn't bad. He advised me not to waste my time."

Marcia laughed and flushed.

And there comes Rodrigo. And when I heard from Marcia,

"If you're going to use MagiWaterjet, a magical water flow propulsion engine, it's going to be a three-torso ship."

and opinions.

"Oh, well, you had that. Sure, that sounds like the best part."

Marcia agrees.

Trimaran (Tritorso) and Catamaran (Doubletorso) were excluded in order to reduce the width of the ship in view of the river width, but they came here to consider recruitment from a different perspective.

"... then, if we make it a three-torso ship and put the MagiWater Jet, the magical water flow propulsion engine, on the leading hull... can we do this?

"Yeah, looks good"

Jen agrees. That position would make the water flow less likely to interfere with the hull.

"Loads will decrease slightly for that matter, but given the safety, it won't work."

Rodrigo, too, was of the opinion that the best emphasis was on advantages.

"Okay, let's build an experimental ship."

Marcia declares so and heads to Nido Castle. To build and experiment with a simple three-torso ship in the workshop there.

"... Speaking of which, what about Tiberio?

On the way back, Marcia asked Jen.

"When I heard the exchange yesterday, I told him I was still understudied, so I told him about the library in the castle. I'm reading a book about ships there now."

But I'll call you to create an experimental ship after this, Jen said.

Since the workshop in Potlock, the kingdom of Elias, is left to the clerks and Arrow, Arco and Vail, it was artisan (Smith) 20 who borrowed from Jen to help Marcia and the others here.

But it is.

Jen is here today.

"Is this what this is?

"Ugh, yeah. Should we be a little smaller in width?

"Okay."

"Oh, that's fine."

Like this, the experimental ship was completed in about twenty minutes.

Even when it comes to experimental ships, it's a three-torso ship 2.5 meters long and 1.5 meters wide. Size is one person, if you can't do it, it is two.

Three hulls, 1.5 meters long and 50 centimeters wide, are arranged to come to the apex of the bisectric triangle.

Because it is for experimental use, the material is "Magiledine". Because Jen hangs' Toughened ', it is more durable than a FRP ship.

"... I knew it was gin..."

Marcia, who once remembered in Potlock when Jen, Reiko and the three of us went for the victory, said she looked nostalgic and smug.

Tiberio rushes there.

"... this is...! Uh, I called it 'Trimalan'."

I read a book in the library. Looks like it worked fast.

"That's right. It is also called a three-torso ship. I tried prototyping it because it seems like it would have a lot of advantages operating at the rapids."

All you have to do is install the propulsion and control systems, Jen said.

"Reiko"

"Yes, Father."

Jen spoke to Reiko, who had previously been silent assistant to Jen.

"Get me a thruster."

"Yes, here"

MagiWaterjet, a magical water flow propulsion engine, had already been prepared. When, I thought, while Jen was building the hull, Reiko and Craftsman (Smith) 20 were making it.

"Marcia, install it."

"Okay."

Jen helps only to shorten the time. I leave the actual work to Marcia and Rodrigo.

Marcia and Rodrigo were accustomed to installing the MagiWater Jet, a magical water flow propulsion engine, and linking it to the control system.

Cover a simple deck and the work is done in an hour.

"That's it. Jin, let's just experiment!

Marcia is in for a ride.

The experimental ship weighs about 50 kilograms and is lightly lifted overhead by the craftsman (Smith) 20 and transported to the Hermé River.

Jen, Reiko, Rodrigo and Tiberio follow suit. Only Marcia went back to Erdo Castle's room once to change into a wetsuit.

And five minutes later, there was a look of Marcia aboard an experimental ship floating on the Hermé River.

"Wow, cool!

"I'd like to take a ride."

The girls from the village of Kaina, who were collecting demonic stone sand (Magissando) on the Hermé River, gathered together.

"Oh, it's definitely the ship that Mr. Barbara and the others were asking for, isn't it?

One of the girls who came, Patty said.

"That's right. It'll be easier to carry Magissando when it's finished."

"Wow, fun!

With the girls' voices on their backs, Marcia manipulated experimental ships and encouraged data collection.