Daming: If I find a great-grandson, I will teach an emperor through the ages

Chapter 13 Effort Saving and Efficiency

When Jiang Yu and the three left for the Jiangning government office.

Cao Ying here finally let go of the boulder slowly.

Immediately, unrestrained villagers stepped forward, wanting to try it too.

Cao Wei, who was about to nod, suddenly stopped his neck when he looked at more and more villagers gathering around him.

He rolled his eyes and smiled.

Collect money!

Two copper coins per person, experience the feeling of being a Hercules once!

Hearing this, a group of people suddenly became dissatisfied.

With just such a rope and a few iron bumps, it actually costs two copper coins per person?
That’s the price of a meal!
Cao Wei wiped his forehead, which was covered with sweat.

"Look, look!" He stretched his hand far away, "I've been busy for a long time, and I'm so tired, I only need two copper coins for each of you, the price is already very fair, absolutely no cheating !"

"Do you guys want to play or not? If you don't play, I'll quit!"

As Cao Wei said, he made a gesture to climb up the tree and take down the gear set and pulley set.

"Wait, wait." Someone stopped him.

A dark-faced man wearing a sleeveless shirt and stubble came over, frowned, took out two coins from his arms, and stuffed them into Cao Wei's hands.

"For you, for you!"

Then the black-faced man walked over, pulled the rope, and the boulder wobbled up.

The dark-faced man's brows, which were still frowning when he took out the money, suddenly turned into a cheerful smile, and he also made various exaggerated movements.

This time, the hearts of other people were completely aroused, and some people couldn't help but went to pay Cao Wei.

Everyone has a herd effect. If someone takes the lead, more and more people will follow.

In a short period of time, Cao Wei had more than 100 copper coins in his hands.

There are people following behind...

Two copper plates are a lot less, but not a lot.

Moreover, Cao Wei's pulley set is so novel and magical.

One person can actually lift two or three hundred catties of boulders.

For such novel things, people are often willing to pay a small price to experience them.

Soon, the copper coins in Cao Wei's hand were close to two hundred.

He grinned and smiled at Cao Ying, "Let's improve the food tonight."

After hearing this, Cao Ying narrowed her eyes and became happy.

Who wouldn't want to eat something good?

The meat is so fragrant...

at last,

The crowd gradually dispersed, and Cao Wei counted the copper coins in his hand.

210 eight pieces!
Two copper coins are small money, but two hundred coins are no longer small money!

Cao Wei felt as if he had smelled a business opportunity...

This makes money much faster than farming!

The gear set and pulley set on the tree were removed, and it was found that both the gears and pulleys were slightly deformed.

really,

The iron smelting process at this time had too many drawbacks. The iron tools produced had too many flaws and were simply not hard enough.

Back in the courtyard, Cao Wei asked Cao Ying to bring two benches and sit under the shade of the paulownia tree.

"Come on, Ying'er, look!"

He put together two gears, one large and one small, and passed one end over.

"I turn the big gear like this, and the little gear in your hand will follow, and I turn it effortlessly."

"You try..."

Cao Ying went to turn the gear in his hand after listening, but found that it was a bit difficult. If he wanted the big gear on the opposite side to turn, he had to use enough strength.

Then Cao Wei dropped the two gears and handed over the larger end.

"try again."

This time, Cao Ying turned it much easier, and it took no effort to turn the pinion.

"Father, is this why we were able to pull the boulder with just a rope?" Cao Ying stopped what he was doing and looked at Cao Wei.

Cao Wei nodded silently, put the two gears in front of him, and stretched out his hand to draw the distance between the two gears from the center to the outer periphery.

Obviously, the radius of the large gear is much longer than the radius of the small gear.

Cao Ying's eyes lit up when she saw this.

"Father, I understand. This is also a kind of torque you mentioned, right?"

"You can also understand it this way. To be precise, the distance from the center to the edge of a circle is called the radius."

"Radius?" Cao Ying repeated the noun.

"The distance from here to here is two radii, called diameter." Cao Wei gestured.

Cao Ying chanted it again.

"Father, are this radius and diameter equivalent to the length of the lever you talked about before?"

"The longer the radius, the smaller the resistance and save effort?"

Cao Ying is very smart. Understanding things and drawing inferences from one case to another has never been a problem for him.

Cao Wei nodded.

"It's just like the turning log that people install above the well. The longer the handle of the turning log, the less effort it takes to get the bucket up."

"Of course, if the handle of the rotating log is too long, it will be difficult to use, and gear sets and pulley sets of different sizes solve this problem."

“If pulley blocks can be used on a large scale in people’s daily lives and work, a lot of unnecessary labor can be saved.”

"Just like building a city wall, it takes two or three people to lift a two hundred kilogram stone to the top of the city."

"But with this pulley block, even Ying'er and you alone can easily pull the boulder from the ground to the top of the city."

"In this way, if the court builds any fortifications, it won't have to waste money and people."

"The fortifications that were originally supposed to be completed by a hundred people may be enough with fifty people, or even only twenty people."

Cao Ying nodded in agreement.

In order to participate in the imperial examination, he has read many classics, and he also knows about the events of the previous dynasties.

Since ancient times, once the imperial court built any large-scale fortifications, it would be light to say that it was a waste of money and people!
When the Qin Dynasty built the Great Wall, millions of people were conscripted, and almost a million people died. When the Great Wall was built, only tens of thousands of civilians were conscripted.

When the Sui Dynasty built the Eastern Capital and the Grand Canal, they also recruited people on a large scale, and tens of thousands of people died from fatigue.

Moreover, not only were there no wages for building fortifications, but they also had to bring their own dry food, which made the people miserable!

Cao Ying's temperament is quite similar to that of the former prince Zhu Biao, both of whom are extremely generous and benevolent.

That is to say, following Cao Wei for ten years later made him a little more out-of-the-box.

For the common people, Cao Ying couldn't bear to see them suffer.

And isn’t the gear set and pulley set that Cao Wei has created now an artifact that benefits the world?

As long as this pulley block is dedicated to Grandpa Huang, in the future when the Ming Dynasty builds fortifications, there will no longer be a worry about wasting people and money!

Cao Wei put the gears together again.

"Look, Ying'er, I only use half the power to drive the small gear with the big gear. This is to save effort...

In this way, using the small gear to drive the large gear, I also only use half the effort, but it can make the large gear rotate faster, which is called improving efficiency. "

Cao Ying was a little confused at this time.

"How can this efficiency improvement be used for?"

The Ming Dynasty had not even entered the industrial age at this time, and there was no need to improve efficiency in this way. Naturally, Cao Ying couldn't think of it.

But just because we can’t use this high efficiency now doesn’t mean we won’t be able to use it in the future.

Cao Wei smiled, counted twenty copper coins and put them in Cao Ying's hands.

"You will know in the future, now you hurry to buy roast chicken for my father, I'm hungry."

(End of this chapter)