Soon, the craftsmen of the kingdom arrived at the dining room where Richard was.

The food on the table had been taken away, and Richard was spreading out a long scroll on it, drawing something quickly with a quill pen.

Edward looked puzzled, and stood by not daring to disturb. The craftsman did not have the courage to do so, and honestly lowered his head and did not say a word, but from time to time he peeked at the scroll drawn by Richard, and felt that His Royal Highness the Prince seemed to be drawing a machine. It looks like a windmill, but it's more complicated......

"Rustling ......"

After a long time, Richard put down the quill in his hand, glanced at the contents of the scroll, nodded slightly, and then turned his head to look at the craftsman who had been waiting for a long time next to him.

The craftsman was a man who looked to be in his fifties, but was actually in his forties. The life of the craftsman in the current world is not easy, even if he is employed by the palace, he is only better than some serfs, and the long-term fatigue makes the other party look very old.

His face was full of wrinkles, his eyes were sunken, and he was looking at him with a worried gaze.

"Your name is Mark, right?" said Richard.

"Uh, Goo-dong...... Back to His Royal Highness the Prince, I ...... The smaller one is Mark. The craftsman hurriedly said, he didn't expect His Royal Highness the Prince to call his name accurately, and there was a bit of surprise and ...... in his voice Terrified. After all, a small person, being remembered by His Royal Highness the Prince, is not necessarily a good thing.

Richard waved his hand and said directly: "Come and see if you can understand this design I drew." ”

"Well, yes. The craftsman hurriedly approached, his eyes fell on the scroll, he glanced at it carefully, confirmed his guess just now, and asked tentatively, "Is this ...... It seems to be...... Is it a windmill, Your Highness the Prince?"

"Yes, it's a windmill, so are you sure you can make it? give you five days at most. Richard said.

"Well, this ......" the craftsman hesitated for a moment, looked at the design drawing, estimated the workload, and said uncertainly, "It should be possible." ”

"Look closer, and you'll be sure. If there's anything you don't understand, you can ask me now, and I'll solve it for you. Don't tell me that there is a problem and that it can't be completed. Richard said.

"Well, yes, yes. The craftsman said on his face, his face couldn't help but sweat, he looked at the design again, his eyes flashed, and suddenly he found that the design really didn't seem to be as simple as he just thought, at least compared to ordinary windmills, there were many parts that he couldn't understand.

Hurriedly stretched out his hand and pointed: "Your Royal Highness the Prince, this ...... This place...... There seems to be some problem, the general windmill is not all installed on a pillar, how can this windmill be installed like this......"

Richard glanced at it and said slowly, "This is the turret." ”

"Turret?" the craftsman was stunned.

"Ordinary windmills can indeed be installed on pillars, with simple structure and easy to make. However, the disadvantage is that it cannot always adapt to the wind direction, and it needs to be adjusted manually, which is laborious and inefficient. According to this design drawing, the windmill blades are installed on a special turret, and the turret can automatically rotate around the central axis to face the wind direction, so that the wind power can be maximized at all times. Richard explained.

The craftsman's eyes widened and he was shocked: "Really...... Can this really happen? but ...... But His Royal Highness the Prince, how did this be done, the wind ...... It doesn't come from one direction, it could be any direction......"

"Because there's this part on the turret. Richard pointed with his finger on the blueprint, "Behind the main blade, there is a tail fan at right angles to it, connected to the gear track at the edge of the turret." Therefore, no matter which direction the wind blows from, as long as it blows through the tail fan, the tail fan will push the turret to rotate, ensuring that the main blades of the wind tower are always aligned with the wind direction. ”

When the craftsman heard this, he scratched his head and still didn't understand it a little, but he understood at least one thing from Richard's words: His Royal Highness the Prince didn't talk nonsense, but really understood, and knew more than him.

In this case......

The next moment, the craftsman took a deep breath, found the next place he didn't understand, and asked: "Your Royal Highness the Prince, ...... here?"

"Well, these two heavy balls swinging outward on the cantilever are centrifugal governors, you don't need to know the principle, just understand that he can be used to automatically adjust the speed of the rotor, so as to adapt to different wind speeds. It's a nineteenth-century pinwheel technology, and it's a little early, but it should be completely ready to be made. ”

"Uh, okay...... Your Royal Highness the Prince, this rotor ......"

"This one. Richard picked up the quill pen and waved it, ticked off the corresponding part and said, "This part is a bit complicated, I don't need you, I'll just come myself." I use it to induce electricity, and I need to use artificial magnets, and you can't make it. ”

"Okay, then His Royal Highness the prince is ...... this part again"

"This is an improved crankshaft that is used to transfer energy to drive the rotor, and this should be noted here......"

"Your Royal Highness the Prince, ...... here"

"This is the part where the current is stored, I will come personally, you only reserve the corresponding part......"

"Then ...... here"

“......”

......

The craftsman and Richard talked for more than an hour before they finally figured out all the details on the blueprint, wiped the sweat from their faces, and said loudly: "Your Royal Highness, this windmill seems to be really difficult, I'm afraid it will take five days......"

"That's a week. Richard said, his voice a little serious, "But it can't be any longer, my time is limited, and I can't put it off." ”

"Well, this ......" The craftsman shrunk his neck and didn't dare to refuse, gritted his teeth and nodded, "Okay, Your Royal Highness the Prince, I will definitely make it in a week." ”

"Well, that's good. ”

The craftsman walked away with the blueprints, and the next moment Edward was about to say something, but Richard had already looked at him first, and commanded: "Edward, you go and help me find some iron filings, and some rust powder." ”

"Huh?" Edward was stunned for a moment, and asked what he had been trying to say, "Your Royal Highness, what are you trying to do here?"

"You'll know when the time comes. Richard said.

"Uh, okay. This answer was similar to no answer, and Edward shrugged his shoulders and reluctantly turned away.

By the afternoon, iron filings and rust powder were delivered to Richard's independent laboratory.

......

In the afternoon, independent laboratory.

The afternoon sun shines in and shines brightly.

Richard looked at dozens of pounds of iron filings and rust powder on the laboratory table and nodded with satisfaction, although Edward's swordsmanship was mediocre, he still had the ability to do things.

According to Edward, the iron filings and rust dust combined weigh more than 100 pounds. The pound is a British and American unit of mass, and 1 pound is 0.45359237 kilograms, which is 0.9071847 catties. However, as is customary, every time he hears someone mention this Anglo-American unit, Richard automatically converts it into a memory unit in his brain.

1 pound is almost 0.9 pounds, and more than 100 pounds is more than 90 pounds, which is indeed a lot.

And the reason why so many iron filings and iron filings powder are needed for no other reason, that is, to make rotors and use them on windmills.

This is the most fundamental method that Richard decided to use, and it will never fail, to make electric currents.