Cantrips were listed outside of official spells. They were basic techniques that even apprentice mages could perform. Usually, they were very easy to learn. The spell models that needed to be constructed were so simple that even a child of a few years old could understand them. However, their effects were also very limited. Many cantrips were not practical in battle or work. They could only be used as supplements for official spells or as "pre-school education."
Gwen knew a few very interesting "cantrips". For example, the prerequisite cantrip for Transfiguration, "Dye Spell," could dye the target's hair into a random color. However, other than the dye, it was not lethal and could only last for two hours. Another cantrip, "Mind Training," was purely used to train one's spiritual power. After performing the cantrip, it would immediately summon a phantom in the caster's field of vision. This phantom would immediately begin to read out the sad literature that the caster wrote when he was young until the caster stopped the cantrip. It was incredibly effective in training one's mind.
Well, Gwen understood the term "sad literature" by himself. In the perception of local mages, the phantom would mainly talk about all the failures and stupid mistakes in the caster's life. Because the phantom could only be seen by the caster, it was probably a kind of psychological suggestion. It was a technique that was between magic and technology. It was very effective in training one's spiritual power, self-reflection, and summing up experience. However, most people were not willing to learn it.
For the official mages, they were not willing to call those who only knew how to use cantrips as "spellcasters". Those who performed a few cantrips on the street to fool the ignorant commoners, or even relied on a few cantrips to fool the countryside knights, were all lousy apprentices. Moreover, even if they were apprentices, they would not be proud of mastering a few cantrips. On the other hand, if they could not even master a few cantrips, it would definitely be embarrassing …
Rebecca was obviously one of the most embarrassing mages.
The repulsive cantrip, which had almost traumatized her as a child, was one of the few and relatively powerful cantrips.
It was one of the prerequisites for force field spells, a variant of the "telekinesis" cantrip. It was also a technique to practice a series of spells, including Gravity Manipulation, Levitation, and Energy Evoking Hand. The purpose of the repulsive cantrip was to push away objects in front of or around the caster (the specific effect depended on the type of rune bytes added when building the spell model). The weight of the objects that were pushed away depended on the strength of the caster's magic power. It was one of the few cantrips that could play a certain role in a battle, such as pushing away the enemy or making the enemy lose balance.
Gwen knew about this cantrip, but he did not think of it at all.
All he could think of was expanding gas or high-temperature and high-pressure air flow. Even if the model of an electric motor flashed in his mind, he could not connect it with the most basic "repulsive cantrip" in this world.
Looking at Rebecca excitedly describing her idea, Gwen began to reflect on himself with a self-deprecating attitude.
It was not to overestimate the open-minded ideas and the experience of a "traveler". These ideas and experiences may have miraculous effects, but many times, they would also become the constraints and stumbling blocks of the traveler, just like this time. Originally, Gwen Cecil had the repulsive cantrip in his memory, but why did he not think of it?
Because Gwen's mind was full of classic engine models on Earth.
Rebecca had never seen a steam engine, nor did she know what an internal combustion engine was. She did not even understand why Gwen had to add a sealed cylinder in the machine, so her thinking was not limited by this aspect at all. She only needed Gwen to propose a big idea, and then with her own good brain and the magic knowledge of this world, she could come up with a more perfect solution.
Of course, a very important reason for this was that Rebecca was indeed very talented. With her advanced ideas, as long as she was not starving to death in this world, she could be a great person, at least the kind that could be printed in a history book for two classes. But it was undeniable that the people in this world were not stupid.
They just did not think in that direction!
Heti was also enlightened by Rebecca's idea. She took a piece of paper and casually sketched runes and lines on it. "Yes... repulsive cantrips are also very suitable to be converted into simple magic circles. In fact, many magic gears, such as the self-opening door and the most common floor traps, are driven by repulsive cantrips. But no one has ever thought of converting this force into a standardized machine that can run continuously... Ancestor, your wisdom and thinking are really unfathomable."
As she spoke, she handed over the sketch she had sketched in her hand.
Gwen was sweating profusely after being praised by Heti. He was not done with his introspection yet...
He took the sketch from Heidi and glanced at it. He found that there were not only a few of the simplest repulsive magic circles drawn on it, but also the cheapest combination of materials that could be used to complete the corresponding magic effects were marked below them.
She was indeed a thrifty person. Without Heti in the camp, he did not know how much money he would have to spend.
The three of them gathered their heads and began to excitedly discuss the extremely basic thing of repulsive cantrips. Rebecca first pointed to the cylinder on Gwen's original drawing and said, "If we use repulsive cantrips, then this sealed metal cylinder can be directly removed, or at most leave a protective cover to prevent foreign objects from falling in. There is no need to be so tight."
"We can engrave the repulsive cantrips on one end of the pedestal and let it push this thing called the piston." Heti's interest was also aroused. "But how does the piston come back after being pushed away?"
"By inertia. The inertia of this iron wheel is called the flywheel." Gwen pointed to the flywheel connected to the piston. "It is connected to the piston through the crankshaft. When the piston is away from the repulsive cantrips, the flywheel rotates and the piston returns to its original position."
Amber stared at it for a long time. At first, she did not understand it at all. But as Gwen and the others discussed, she finally got a clue. After all, the basic principle of the machine was not complicated. Its main structure was just a bunch of basic wheels and connecting rods. As a bandit, Amber often dealt with all kinds of mechanisms and traps. She was not unfamiliar with the wheels and connecting rods. At this time, when she saw that everyone was discussing the problem of the piston returning to its original position, she said faintly, "What happens when the piston returns to the repulsive cantrips? At this time, the cantrips are still pushing it out. But at this time, the big wheel has to complete the last half of its rotation before it can continue to exert force. So at this time, the machine is competing with itself. "
"Yes..." Heti frowned. "When the piston is away from its original position, it naturally needs the repulsive cantrips. But when the piston returns to its original position, the repulsive cantrips will cancel out the useful power..."
"The 'useful power' is called 'work'." Gwen took this opportunity to instill the nouns he was familiar with. At the same time, he had already thought of how to solve the problem of the machine competing with itself. For the four-stroke engine or other classic engines on Earth, exhaust was needed to relieve the pressure in the cylinder during the return of the piston. But for this machine, he needed to stop the repulsive cantrips the moment the piston returns to its original position. "Rune trigger, we can use the rune trigger to control the repulsive cantrips. When the piston moves away from the base of the power mechanism, the rune trigger is connected. When the piston returns to its original position, the rune trigger is interrupted when the piston returns to its original position." Rune trigger, we can use the rune trigger to control the repulsive cantrips. When the piston moves away from the base of the power mechanism, the rune trigger is connected. When the piston returns to its original position, the rune trigger is interrupted... "
A variety of magic symbols appeared in Heti's mind. "But how do we control it? The flywheel rotates very fast, the piston moves very fast, and the reaction is so fast that we have to switch the position of the rune trigger in an instant. This requires a high-level rune... "
But before she finished thinking, Rebecca said casually, "Tie the rune trigger to the piston. When the piston moves to the base, the base will be connected. Then the piston will be pushed away. When it moves closer, it will be pushed away. When it moves closer, it will be pushed away. When it moves closer, it will be pushed away. When it moves closer, it will be pushed away.
So, what kind of image had appeared in this girl's head to cause the words "jump, jump, jump" to appear?
Heti and Gwen both stared at Rebecca. The former was surprised by the ingenuity of the solution, while the latter was amazed that the silly roe deer was really a genius in science and engineering. How did she manage to switch between magic knowledge and mechanical knowledge so seamlessly and jump out of her current ideas and get results from new ideas in an instant? Didn't her brain need to cool down? Or did the two parts of knowledge run in sync in her mind? She used the one that came up with the solution?
Rebecca, on the other hand, shrank her neck under the stare. "Did I say something wrong?"
"No, no, no, this is a very good idea." Heti quickly waved her hand. "And I also thought of something else. Why do we only engrave a repulsive magic circle? The piston has to move back and forth, so we can engrave a repulsive magic circle on the other end of the power mechanism. This way, the piston can do two boosts in one reciprocation... "
Gwen also looked at the sketch on the table seriously and thought about the position of the runic trigger. Suddenly, he had an idea. "Besides, fixing the runic trigger on the piston is not the best way. This means that it will only be connected for a moment in one operation. We can connect it to the shaft of the flywheel and let the two runic magic circles on both ends of the piston be controlled by the trigger. We can use a 'toggle' device to switch the magic circuit where the trigger is located. That is to say, when the flywheel rotates to the first half of the revolution, the rune is inside the first magic circle, and when the flywheel rotates to the other half of the revolution, the rune is connected to the other magic circle. This way, when the piston is pushed away from the repulsive magic circle, the first repulsive magic circle works until the piston reaches the farthest point. At this time, the first repulsive magic circle is closed, the second one is opened, and the piston is reversed. What do you think? "
Rebecca opened her mouth and looked at Heti and Gwen. Suddenly, she pursed her lips and said dejectedly, "I am still the stupidest..."
"You are not stupid at all!" Gawain didn't know whether to laugh or cry at this girl who was used to feeling inferior. "You were the one who came up with the idea of the repulsive array. Your aunt and I were just hammering on the foundation."
Rebecca continued to purse her lips. "But the idea of this machine was suggested by you, ancestor."
"But if it weren't for your inspiration, my machine would have remained as a blueprint forever." Gawain laughed. "Don't you think you're awesome?"
"Really?"
Gwen and Heti smiled and nodded together. "Really, really."
"Oh!"
"By the way, ancestor, have you given this device a name?" Heti suddenly remembered something. "This is a new thing... You have the right to give it a new name."
"A name..." Gwen pondered and a name came to mind. "Then let's call it the Magical Engine."
Heidi smiled as she listened to the strange word that was combined with a strange grammar. "Ancestor, this is indeed a good name."
Rebecca also nodded. "Yes, yes. Although I don't understand what it means, it sounds cool!"
Looking at his two "granddaughters" who were immersed in joy and excitement, Gawain lowered his head to look at his sketch as a new idea popped up in his mind.
Can this structure continue to be improved?
Or rather … since he already had the repulsive array and the runic trigger as a foundation, could he be more straightforward and come up with a more advanced machine with a completely different structure?
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