Magi Craft Meister

"Finish this' engine 'loaded ship first!

In the workshop, Marcia's energetic voice echoed.

In front of her is a prototype golem engine made by Jen.

What puts it on is a three-torso ship (Trimalan) six metres long. It is a prototype boat that plans to sell it at high speeds, with good small turns and good stability.

The work itself is completed in three days, including adjustments. It's just a test voyage.

It's the usual combination of Marcia piloting and Arrow assisting.

"Marcia, be careful."

"Yeah, I know, Dad"

It is new to my memory that my father Rodrigo, who had previously been unluckily encountered with 'Bowall' and discovered Marcia in distress, was impotent and himself badly injured.

Even for my father's sake, it was Marcia who was determined in his heart to return safely.

Take your time offshore first.

The three-torso ship runs out sliding through the calm waters of the docked bay.

"Yeah, the ship's stability hasn't changed. … this is obvious."

The weight of the engine increased by about 30%, but that was adjusted, so the balance against the whole ship was not out of order.

Out of the bay in about half an hour, the waves got a little higher.

"All right, Arrow, I'm coming!

"Yes, Master Marcia"

Marcia, who hung up on Arrow, turns the engine in earnest.

The way she took it is to step in the 'pedal'.

In response to stepping in, more 'Magnetin (Mana)' flows into the engine, increasing output and rotation.

"Oh, oh, wow, this is!

Gun, the sense of acceleration I feel. It wasn't an engine before.

"Jin said there's roughly four times as much 'horsepower',"

'Horsepower' is the 'work' the engine can do in this case.

Simply put, horsepower is required in torque x rpm. Of course, it is necessary to multiply the constants and so on in order to produce mechanical figures.

The stroke was halved and doubled up because of the low rpm. But the torque is half.

Furthermore, for miniaturization, the size of one cylinder is reduced and the torque generated is further halved.

Eight previous golem engines, which were single cylinders (single shot), were collected to combat torque that fell that way, and torque = eight times the rotational force.

Now the simple calculation doubles the RPM and the torque is one-half × one-half × 8 = two-fold.

Therefore, the horsepower is 2x 2x = 4x.

Additionally, Jen himself made it, so it was more efficient with about 20% more.

"Oh, fast! This is it, this!

Marcia happy with more performance than she wanted.

"Dear Marcia, in front is the rocky reef zone."

Advice from Arrow. Looks like we got close to the rocky reef zone while we were obsessed.

"All right, slow down!

But.

"Ugh, yeah!?

The impetuous three-torso ship did not slow me down more than I thought.

"Avoid!"

Marcia twisted the joystick as much as she could and rocked the reef with one hair in between. If it weren't for a stable three-torso ship, it could have been overturned.

"Oh, it was dangerous..."

Marcia realized that the speed would improve with the new engine, but the deceleration would be more difficult for her.

"This is a liberal question..."

On the way home, Marcia worried.

"To Jin... No, I have to fix this myself"

I see a wharf with a workshop.

"Yes, I'm here to help."

And Arrow nodded mightily in the words of Marcia's determination.

"That's hard."

"Right?"

That night, Marcia had an argument with Rodrigo poking her knees together.

"I think it would be best to reverse the screw."

"But that's not in the characteristics of the engine right now. I feel like you could do it right away if you talk to Jin, but I want to keep that to the end."

"Then, Hmm..."

Until late at night, the consultation continued.

"All right, I got it!

As a result of the discussions that lasted until late at night, it was decided to try the brakes in the form of letting the plates stick out in the water.

Jet fighters, for example, are incorporated under the name Air Brakes. The principle is the same.

It's not dressed because it's prototype number one, but Marcia and Rodrigo are highly capable of getting there on their own.

Name it 'Waterbrake'. As it is.

An overall check was carried out before leaving the port again on an improved three-torso vessel.

"Dear Marcia, the bearing of the engine is only slightly worn"

That's where Jen kept an eye on Arrow.

"If you keep using it, it will cause rattling and in about ten days it will reduce efficiency to 70%"

"You don't have a problem today, do you? Then we'll consider the matter when we get home."

First, Marcia wanted to clear up one problem at a time.

"Yeah, yeah, that works!

Marcia confirms the effect of the brakes at sea.

The brake plates stuck out in the water, far more resistant than the air, played a brilliant role.

"... and to say, it's because of the power of the engine..."

Jen, contacted by Marcia, was thinking about the wear of the bearings.

Since this is an engine problem, it was only natural that requests for improvement would come to Jen, who is the supplier.

The bearings now are gunmetal.

The gunmetal is an alloy of copper and tin. Therefore, it is less rigid than the crankshaft made of iron alloy, so it wears off.

Conversely, however, if it were stiffer than the crankshaft, this time the crankshaft would wear out.

"Lubricate, or..."

Lubrication is the formation of a film, such as oil, between the shaft and the bearing, which reduces friction by preventing direct contact and, at the same time, also prevents wear.

"Or use low-friction substances, or..."

"Underground Spider Resin (GSP)" made from yarn produced by underground spiders is a material that has a low coefficient of friction and is therefore stain-resistant, such as teflon, polyamide and polyacetal, if analogous to modern earth materials.

"I wish I could use this for my bearings."

Nevertheless, it is possible to use materials that are only present in Penglai.

"And then, other materials..."

"Master (My Road), why don't you use the fin from" The Murderer Sea Serpent "?

"Oh, you had that kind of material too"

Jen and Reiko once exorcised as many as fifty killer sea snakes (Death Cesarpent) off the island of Io, and they also gained a potlock on the spill.

In other words, if it's the fin of the killer sea snake (Death Cesar Pent), it's a commonly distributed material, so there's nothing wrong with using it.

"Oh, don't stand for enough use"

And although this fin is not as good as the underground spider resin (GSP), it has a sufficiently low coefficient of friction and is a great material for bearings.

Thus, the horizontally opposed eight-series engine developed by Jen became almost maintenance-free and the new 'sale' of the Marcia workshop.