The final molds primarily consisted of wires, a substantial quantity of wires were required for both powering the motor and crafting the electromagnets embedded within it.
The process of transforming a wire into an electromagnet was crucial for DAVID's design. By wrapping a wire in a cylindrical shape and passing electricity through it, the wire gained magnetic properties, forming the electromagnets needed for the motor. Two large electromagnets would be positioned on either side of the motor, accompanied by three smaller ones inside the shaft. The rapid alteration of magnetic polarity within the shaft would induce motion through electricity.
With a collection of copper ores in hand, DAVID initiated his modified flamethrower spell, aptly named the 'melting spell.' As the ores gradually reached a red-hot state, DAVID took precautionary measures by placing them on a small wooden board. The board, quick to smoke up and char, shielded his hands from the intense heat. With meticulous care, DAVID continued the process until the red-hot copper transformed into a liquid state. Swiftly tilting the wooden board, he directed the flow of liquid copper into the waiting molds.
As the molten copper cooled in the wooden molds, DAVID kept a close eye on the process. The once-liquid metal solidified, taking the shape of the molds he had painstakingly crafted. The surrounding air shimmered with the heat that still lingered, a hazy reminder of the intense casting.
The wooden molds, however, didn't have an easy time. They stood their ground against the searing copper, but the relentless heat left its mark. The scent of burnt wood filled the air, a fragrant sacrifice to the art of forging.
Knowing what awaited, DAVID made a quick trip to the water supply of the housing area. The bucket dipped into the cool water, creating ripples that disturbed the tranquil surface. The water, an opposite world to the fiery molds, was poised for its part in the upcoming act.
Returning to the molds, DAVID, illuminated by the glow of artificial eyes, faced the charred remnants. In a practiced move, he plunged the remnants into the water bucket. The hot copper met the cool water, a clash that birthed steam and hissing. Bubbles burst on the surface, secrets of the elemental union whispered in ephemeral language.
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After the bubbles in the water had gradually subsided, DAVID reached into the bucket, retrieving the remnants of the wooden mold. The once-sturdy structure had succumbed to the molten iron, leaving behind a charred skeleton.
Brittle and blackened wood fibers clung to the solidified copper. DAVID picked up the piece, the scent of burnt wood lingered.
Examining the resulting copper bar, DAVID found it to be a uniform shape. Resilient against the fiery trial, it was ready for the next phase.
Brushing away any charred remnants, DAVID took a steel dagger and began to cut the copper bar into individual wires. Each cut was deliberate, forming a series of slender wires crucial for the motor. The soft clinks of metal meeting copper echoed in the workspace.
With the raw material in hand, DAVID shifted his focus to creating electromagnets. Bending wires into coils, he skillfully manipulated each one, forming essential components for the electromagnets.
As the wires took shape, their curved forms intertwined like metallic vines. DAVID's controlled hands guided them into the desired configuration, creating electromagnets with calculated intricacy.
DAVID meticulously connected the two ends of an electromagnet into the small holes in his right hand's fingers (see chapter 12 : body), ensuring a secure and efficient electrical connection. With precision, he initiated the flow of power to the electromagnets. The workspace crackled with the faint hum of electricity as the interconnected wires came to life.
To assess the electromagnetic field generated by the magnets, DAVID conducted tests using iron ores. He deftly manipulated the ores, observing their swift attraction to the electromagnet attached to his right hand. The successful demonstration confirmed the functionality of the electromagnets.
Encouraged by the positive outcome, DAVID swiftly transitioned to the next phase. The remaining ores were subjected to the intense heat of his melting spell, transforming them into molten metal. With practiced efficiency, he poured the molten metal into the prepared molds, carefully shaping the individual components of the motor.
As the molten metal cooled and solidified, DAVID began the meticulous assembly process. His hands worked deftly, screwing bolts into place and integrating each part seamlessly. The workspace, illuminated by the artificial glow of his eyes, transformed into a scene of craftsmanship as the copper components and electrical elements converged into the final form of the electric motor.
Upon completion of the motor assembly, DAVID connected its six wires to the power ports in his right fingers. The setup involved two wires for each side magnet and two for the middle magnet. The side magnets maintained a constant magnetic field, while the middle magnet's electricity flow underwent rapid alterations, causing its poles to reverse in each change and ensuring continuous rotational motion.
DAVID configured a secondary program to control the motor, dedicated solely to reversing the polarity of the middle magnet at a specific frequency. The frequency, adjustable by DAVID, dictated the rotational speed of the motor. With the program set, he initiated it, starting with a frequency of 50 times per second.
As the program gradually increased the switching frequency of the middle magnet's poles, the motor sped up, approaching 50Hz, DAVID observed the successful rotation of the motor. Satisfaction filled him, marking a significant technological advancement in this unfamiliar world and a substantial improvement over his air pump spell.
Content with the motor's functionality, DAVID promptly crafted a propeller and a connection point. This connection point would allow the motor to push air into the air tank while preventing any escape, enhancing the efficiency of the air pump.
Following the creation and attachment of the propeller and connector, DAVID embarked on testing the motor's various speed levels. The simplicity of his design proved to be highly resilient, with the motor enduring an impressive amount of speed exerted on its propeller.
DAVID concluded the testing when the pump began consuming 20 seconds of processing power every second. Notably, this wasn't due to energy transfer limitations; theoretically, he could allocate over 900 seconds of processing power. However, the fan had started to wobble. The solid iron propeller, rotating at over 500 rpm (rotations per minute), experienced significant tension, leading to the wobbling effect.
Gradually slowing the motor until it came to a halt, DAVID initiated calculations to determine the time required to fill the oxygen tanks. The fan could move approximately 10 m^3 of air per second at 500 rpm. Considering the oxygen tanks' pressure at 120 atm and a volume of 2.3 m^3, the calculation involved transforming x amount of air at 1 atm into 2.3 m^3 of air at 120 atm. The result indicated that the fan needed to run for 28 seconds to fill the tank, consuming only 560 seconds of processing power. This marked a significant improvement compared to the 55 hours of power used with the air pump spell.