Tricks, which are listed outside of formal spells, are the basic techniques that apprentice-level mages can also cast, usually they are extremely difficult to learn, and the spell models that need to be constructed are simple enough for children to understand, but the corresponding effects are also extremely limited, the function is very simple, and even many tricks are not practical in combat or work, but can only be used as a supplement to formal spells or "preschool education".

Gawain knew a few interesting "tricks", such as the "dyeing technique", a precursor to the Transfiguration, which can dye the target's hair into a random color, but it has no lethality other than dyeing, and it only lasts for two hours; Or the trick "Mind Training", which is simply used to temper mental power, will immediately summon an illusion in the caster's own field of vision, and this phantom will immediately begin to read aloud the youth and sad literature written by the caster when he was a child, and keep chanting until the caster actively stops the effect of the spell, which has an incredible effect on tempering the mind......

Well, the literature of youth sorrow is Gawain's own understanding, in the cognition of the local mage, this phantom is mainly to babble about all the failures and stupid mistakes in the life of the caster, because the phantom can only be seen by the caster himself, so this is probably a psychological suggestion, a technique between spells and techniques, which is used to temper the spirit, introspection, and summarize experience is quite effective, but most people are not happy to learn this.

As far as the official mages are concerned, they are reluctant to call those who have only mastered tricks the same "spellcasters" as themselves, and those who perform a few tricks in the streets to fool the ignorant commoners, or even fool the country knights with a few tricks, are lame apprentices, and even apprentices do not consider mastering a few tricks a matter of pride—but correspondingly, if they can't master even a few tricks, it must be a shame......

Rebecca is clearly a member of the mage disgrace world.

And the repulsion trick that almost made her childhood have a psychological shadow is one of the few and more powerful of all kinds of tricks.

It is one of the precursors of the force field system spells, which belongs to the same as the "mind transfer" variant, and is also a training technique when practicing a series of spells including gravity manipulation, levitation, and the hand of plasticity, the role of the repulsion spell is to push away the items directly in front of the caster or around the area (the specific effect depends on the type of rune section added when building the spell model), and the weight of the push away item depends on the strength of the caster's magic power, it is one of the few tricks that can have a certain effect in battle - push away the enemy, Or throw the enemy off balance.

Gawain knew the trick, but he didn't expect it at all.

His mind was full of work done by expanding gases, or high-temperature and high-pressure air currents—even if the model of the electric motor occasionally flashed, he failed to connect with the most basic "repulsion trick" in this world.

Watching Rebecca describe her thoughts with great interest, Gawain reflected on himself with a little self-deprecation-

Don't overestimate the "traverser's" open-minded ideas and otherworldly experiences, these ideas and experiences may have miraculous effects, but many times it will also become a shackle and stumbling block for the traverser himself, just like he did this time: Gawain Cecil originally had a repulsion trick in his memory, but why couldn't he think of it?

Because Gawain's mind is full of classic engine models on Earth......

Rebecca had never seen a steam engine, she didn't know what an internal combustion engine was, and she didn't even understand why Gawain had to add a sealed cylinder to the machine, so her mind wasn't limited by that at all - she only needed Gawain to come up with a big idea, and then add her own good brain, and knowledge of the magic of the world, and she could come up with a more perfect solution.

Of course, a very important reason for this is that Rebecca is indeed gifted, as far as her advanced ideas are concerned, it is possible to be a great man in this world if she does not starve to death, at least the kind that can be printed in history books for two class hours, but it is also undeniable that there is one thing: where are the otherworldly people stupid?

People just didn't think in that direction!

Hetty was also enlightened by Rebecca's idea, she took a piece of paper and sketched runes and lines on it: "That's right...... Repulsion tricks are also great spells that can be converted into improvised magic circles, and in fact many magic traps, such as self-opening doors and the most common floor traps, are powered by repulsion tricks - but no one has ever thought that this power could be transformed into a standardized, continuous machine...... Ancestor, your wisdom and thoughts are truly unfathomable. ”

She said as she handed over the sketch she had sketched in her hand.

Gawain was sweating profusely at the back of Hetty's head: his self-reflection is not over yet......

He took Hetty's sketch, and at a glance, he saw that not only did it outline the simplest repulsive circles, but also marked the cheapest combination of materials that could accomplish the corresponding spell effect.

It's really a thrifty family - if there is no Hetty in the camp, I don't know how much more money will be spent.

The heads of the servants all came together, and began to discuss with great interest around the "repulsion trick", which is extremely basic in spells, Rebecca first pointed to the cylinder on Gawain's original drawing: "If it is a repulsion trick, then this sealed metal cylinder can be removed directly, or at most a protective cover to prevent foreign objects from falling in, it doesn't need to be so tight at all." ”

"We can engrave the repulsion circle at one end of this pedestal and let it propel this thing called a 'piston,'" Hetty was also piqued by his research interest, "but how does the piston that was pushed away come back?" ”

"With inertia, the inertia of this iron wheel, it's called a flywheel," Gawain said, pointing to the flywheel connected to the piston, "which is connected to the piston by the crankshaft, and when the piston is far away from the repulsion array, the flywheel rotates and resets the piston." ”

Amber stared at the side for a long time, and at first she didn't understand it at all, but Gawain and the three of them discussed and discussed, and she finally saw a clue: after all, the basic principle of this machine is really not complicated, and its main structure is just a bunch of basic wheels and connecting rods, and as a thief, Amber often deals with various traps, and she is still not too unfamiliar with those wheels and connecting rods. At this time, seeing everyone discussing the issue of piston reset, she said faintly next to her: "What about the process of the piston getting closer to the repulsion array?" At this time, the circle was still pushing it out—but at this point, the big wheel had to complete the last half turn before it could continue to exert its power, so the machine was struggling with itself. ”

"That's right......" Hetty frowned when he heard this, "When the piston is far away, it naturally needs to be pushed by the repulsion circle, but when the piston is reset, the repulsion circle will cancel out those useful power ......"

"'Useful power' is called 'doing work,'" Gawain took the opportunity to instill the other party with those terms he was familiar with, and at the same time had already thought of how to solve the problem of the machine "competing with himself" - for the four-stroke engine on the earth or other classic engines, the piston reset process needs exhaust to relieve the cylinder pressure, and for this machine, he needs to stop the repulsion circle at the moment of the piston reset, "Rune trigger, we can use the rune trigger to control the repulsion array- When the piston moves away from the base of the power mechanism, the rune trigger is engaged, and when the piston is driven by the flywheel to return and approach the base, the rune trigger is interrupted......"

Hetty's mind popped up with various magic symbols: "But how to control it?" The flywheel spins quickly, the piston moves fast, and the reaction is so swift that you have to switch the position of the rune trigger in an instant, which requires advanced rune ......"

As a result, before she could finish thinking about it, Rebecca said casually: "Tie the rune trigger to the piston, and when the piston is close to the base, the base is open, and then the piston is pushed away, and when you get close, you push it away, and when you get close, you push it away...... Wow, bouncing. ”

So what picture is coming out of this girl's head so that the words "bouncing and jumping" come out?

Hertie and Gawain glared at Rebecca, the former amazed at the ingenuity of the solution, and the latter amazed at how stupid roe deer was a science and engineering genius—how did she manage to seamlessly switch between magical knowledge and mechanical knowledge, and instantly jump out of her current train of thought and get results in new ideas? Doesn't her brain need to be cooled? Or did these two parts of knowledge actually run in parallel in her mind? Which one comes up with a solution, which one to use?

And Rebecca shrunk her neck when she was staring: "Am I wrong?" ”

"No, no, no, that's a very good idea," Hetty quickly waved his hand, "and I thought more: why did we only carve a repulsion circle?" The piston has to move back and forth, so we can also engrave the repulsion circle on the other end of the power mechanism, so that the piston can do two afterburners in one reciprocating ......"

Gao Wen also looked at the sketch on the table carefully, thinking about the position of the rune trigger in his mind, and suddenly had some thoughts: "In addition, it is not the best way to fix the rune trigger on the piston, which means that it will only be connected for a moment in a single operation, we can connect it to the hinge of the flywheel, and let the two rune circles at both ends of the piston be controlled by this trigger, and use a 'toggle' device to switch the magic circuit where the trigger is located." That is to say, during the whole process of the flywheel turning to the first half of the circle, the runes are inside the first circle, and in the process of the flywheel turning to the other half of the circle, the runes are connected to another circle, so that the piston is pushed away from the repulsion circle during the whole process, and the first repulsion circle is in play until the piston reaches the farthest point - at this time, the first repulsion circle is closed, the second is opened, and the piston is reversed, what do you think? ”

Rebecca opened her mouth, looked at Hetty, and then at Gawain, and suddenly flattened her mouth and became frustrated: "Sure enough, I'm still the stupidest ......"

"You're not stupid!" Gao Wen was suddenly made to cry and laugh by this girl who was accustomed to inferiority, "The ideas of the repulsion circle are all opened by you, and your aunt and I are just knocking and beating on this basis." ”

Rebecca continued to flatten her mouth: "But the idea of this machine is still from you, Ancestor. ”

"But without your inspiration, my machine would have been a drawing forever," Gawain laughed, "Don't you think you're amazing?" ”

"Really?"

Gawain smiled and nodded with Hetty: "Really, really." ”

"Oh!"

"By the way, Ancestor, did you name this device?" Hetty suddenly remembered something, "This new thing...... You have the right to give it a new name. ”

"What's the name...... Gao Wen thought about it, and a name came to mind, "Then call it the Magic Energy Engine." ”

Hetty listened to this unfamiliar word with strange grammar, and slowly smiled: "Ancestor, this is indeed a good name. ”

Rebecca also nodded repeatedly: "Yes, yes, although I don't understand what it means, it seems to be very handsome!" ”

Looking at the two "granddaughters" who were in excitement and joy, Gawain looked down at his sketch, and a new thought popped up in his mind:

Can this structure continue to be improved?

Or rather...... Now that we already have a repulsion circle and a rune trigger base, can we simply make a more advanced machine with a completely different architecture?

For example, like an electric motor propelled by electromagnetic force, the piston, connecting rod, and crankshaft are eliminated, and the repulsion array is directly engraved on the annular shell at a certain angle to push the magic guide rotor inside?

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