Waiting for Ma Di to take over the equation handed over by Liu Wan, Zhu Zhanji said to Ma Zhicai: "I was originally going to work for the deputy of the horse institute after the Chinese New Year, but since I am here today, I will also take the deputy of the horse institute to see my collection here. ”

"I don't dare to say that His Royal Highness said that Weichen's life was given by His Royal Highness, and he should do his best."

People in this era talk about death at every turn, and this point really can't be corrected. Zhu Zhanji simply didn't hear it, and took the lead out of the room.

Madi looked at the equation in his hand, and then at his uncle. Ma Zhicai didn't dare to say much, but just gave him a reassuring look, nodded slightly, and hurriedly followed out of the house.

Just behind this row of houses, between the two rows of houses, there is a large warehouse. The door of the warehouse was locked, and it seemed to Ma Zhicai that it had not been opened for at least half a year.

The little eunuch named Liu Wan took out a key and tried several times before opening the copper lock.

Then the two little eunuchs worked together to open the two iron doors.

Zhu Zhanji stood at the door and looked at it, although the bonus had not been opened for a year, because the house was relatively well closed, there was not much dust inside.

Li Liang said softly: "Your Highness, let's clean up first, and then you can come in!" ”

"It's okay, I'm just taking the horse deputy to see the environment, let him know what to do in the future, and be prepared."

Ma Zhicai saw this scene in front of him, he couldn't believe his eyes, he thought that this was a warehouse where some items were placed, but he didn't expect that this was actually a carpentry workshop.

Except that the tools are more delicate, some of the tools are different, and the furnishings here are not much different from his own workshop.

Moreover, the furnishings are also a bit disorganized. All kinds of different woods, all kinds of different models made, piled up everywhere.

Could it be that His Royal Highness Taisun has a hobby of carpentry? He thought so at first, but then denied himself, because there had never been a rumor about it!

When he looked closer, he found that almost all the models in it were unknown to him, and he couldn't tell what the different woods were used for.

In one corner of the house, he also saw a huge triangular kite, but it had no tail, and he didn't know if such a kite could fly into the sky.

Zhu Zhanji walked to the front of a large cabinet, took out the key with his own hands, and opened the cabinet door. "Take out everything and put it on the workbench."

A few little eunuchs cleaned up the table, and then took out the items in the cabinet that were wrapped in various cloths, which were all kinds of items, and Ma Zhicai couldn't tell what they were.

Then, Zhu Zhanji beckoned to him, and he hurriedly walked closer, held his breath, and watched Zhu Zhanji open these cloth bags.

The first one Zhu Zhanji took out was a ruler, which was about three feet long, and was marked with small straight bars.

Then, there was a square ruler, and then a wooden compass, vernier caliper, and various measuring tools.

Compared with other experiments in the house, Zhu Zhanji attaches the most importance to this simplest tool, because these are the basic standards for industrial development.

It's just that if you want to promote these standards, it is not possible to directly come up with the standards of later generations, he must improve and integrate them on the basis of today's measurements, so that everyone can accept them.

In later generations, the rice was originally 1/10 million of the distance from Paris to the North Pole, but later it was changed to about 1/300,000 of the speed of light.

Of course, Zhu Zhanji will not adopt these two standards, and he cannot adopt them, so he directly adopts today's Daming measurement standards.

Daming does not have the standard of rice, from large to small, respectively, in the lead, zhang, ruler, inch, minute, centimeter, milli, silk, suddenly, micro, fiber.

Except for the decimal system, the rest are decimal systems, which is actually not much different from later generations.

However, the only thing missing is the most commonly used and easiest size to be used as a metric.

Moreover, there is not much difference between the Ming Dynasty and the later generations, about 530 meters in the later generations, this standard has been handed down according to the Zhou system, and there is a very wide mass base.

Therefore, Zhu Zhanji does not need to come up with the standards of later generations at all, and only needs to add two units of measurement to the existing basis.

Of these two units of measurement, one is the kilometer and the other is the meter.

With the addition of these two units of measurement, the weights and measures for the entire length form a complete decimal system.

Although the current rice is slightly longer than the rice of later generations by about six percent, before the rice of later generations appeared, the rice of the Ming Dynasty could become the general standard of later generations.

Ma Zhicai is engaged in this business, so Zhu Zhanji just said it simply, and he completely understood. And according to this standard of meters, it is easy to convert a new standard of area, floor area, and volume.

Because it is a full decimal system, it is easier to calculate than the original standard when calculating.

Only then did Zhu Zhanji say: "I need you to work out accurate standards for meters, decimeters, centimeters, and millimeters strictly according to the existing standards, which shouldn't be difficult, right?" ”

Ma Zhicai bowed down and said: "His Royal Highness has already given the criteria for division, and Weichen is just a simple portrayal, and there is no problem at all." ”

Zhu Zhanji nodded and said: "Since Emperor Qin unified the weights and measures of the world, for more than a thousand years, weights and measures have been expanded repeatedly, and the original one zhang was only a little more than two meters, but now it has reached more than three meters. We are now going to develop a set of decimal metrics and use them for the whole country, and even the whole world. ”

Ma Zhicai asked: "Your Highness, Wechen is just a craftsman, although he can make a meter ruler that meets His Highness's requirements, but in this regard, Wechen doesn't seem to have the ability." ”

Zhu Zhanji shook his head with a smile and said: "No, you are not needed for promotion, and you are not even needed to formulate this standard, I let you be familiar with these now, just to ask you to help me make some models that meet my mind." Please come with me......"

Coming to the front of the glider he made himself, Zhu Zhanji sighed and said: "This is a big umbrella made after the wings of birds, I hope to be able to fly into the sky, but there are still many places that are not qualified, so I hope you can help me complete it." ”

Heaven......

Ma Zhicai was a little speechless, if it weren't for the fact that the person in front of him was the grandson, he would have been eager to reprimand the whimsy.

Since ancient times, all human beings have dreamed of going to heaven and earth, but until now, no one has been able to do it.

Just twenty years ago, in the twenty-eighth year of Hongwu, a rich man named Wanhu was born. Behind a seat, he loaded 47 of the largest rockets he could buy at the time. Then tie yourself to a chair and hold a large kite in each hand.

Bird-like flying machines were placed on the top of the mountain, and 47 rockets were set on fire at the same time, with the aim of flying into the sky with the power of the rockets moving forward, the rising force of the kites, and the balancing effect. So, the flame-spewing "flying birds" took Wanhu out of the mountain and rushed into the air. Soon, however, the fire disappeared, and the birds tumbled and fell at the foot of the mountain, killing all the households.

He said in a trembling voice: "Your Highness, such an act is risky, Your Highness's golden body, you must not be cautious. ”

Zhu Zhanji said with a smile: "Lone just asked you to perfect this wing, and didn't say that Lone wants to go to heaven." ”

He hesitated for a moment, looked around this wing for a long time and then asked: "Weichen sees that this wing is finely made and the materials are exquisite, I don't know where it needs to be improved?" ”

"The strength of the main control lever and the toughness of the connections at each part."

In his previous life, Zhu Zhanji had nothing to do and played paragliding and hang gliding a few times. Don't think about paragliding, because there is no windproof cloth that can make paragliding now, it needs to store air and design wind flow guidance, Zhu Zhanji knows what it is, and he can't prevent it at all.

But the glider structure is simple, and the defense is much simpler. The key problem now is that the material process is not up to par.

The fabric of the glider can be made of silk produced in Nanyue today. This kind of silk adopts the original process, using domestic silk as raw material, weaving into a plain weave fabric on a jacquard hand-pulled machine, and then using the tuber juice of a unique plant - dioscorea for many times to impregnate and dry, so that the fabric is attached to a layer of yellow-brown gelatin.

Then the pond mud containing high valent iron ions is evenly coated on the surface of the fabric, and it is repeatedly dried and washed to make a black fabric on the front and brown on the bottom, which is an expensive yarn silk product and is regarded as the best product of Chinese silk

After six steps and 36 processes, this kind of silk has reached a very high standard of windproof, waterproof, toughness and tear resistance.

The problem of cloth has been solved, however, the material process of making the main skeleton of the glider and the material process of the main load-bearing bracket is difficult to solve in this era.

It is impossible to work with steel, because it is simply impossible to fly up with such weight. However, if you don't use steel products, wood or bamboo, when you encounter strong winds, the pressure resistance is not up to standard.

So this model Zhu Zhanji had already been manufactured, but it could not be used.

In addition to this glider, there is also a bearing model he made in this warehouse, which is the most important accessory in the industrial age, and the bearing is indispensable for almost all transmissions.

If you want to make bearings, the most important thing is the manufacture of steel balls and the grinding of the card groove, which not only requires technology, but also needs to improve the material.

Zhu Zhanji also counted on Ma Zhicai to be able to make some inverted casting molds to solve the process problems.

In addition to these, there are also simple transmission lathes, drilling machines and other models, which require Ma Zhicai to make samples first.

And Ma Zhi saw this, although many things did not know its function, but he also understood that this was what he was interested in.

Breaking away from the tilt of officialdom, you can also get the appreciation of your grandson, and you can do what you are interested in.

He said respectfully: "Your Highness, Weichen doesn't need to rest, he wants to take office immediately." ”

Zhu Zhanji smiled and said: "Don't worry, there will be countless things for you to do in the future, but everything you do must not be leaked." ”

"Wechen keep it in mind and never leak it! However......" Ma Zhicai was ruthless and said: "Weichen's nephew ......"

Zhu Zhanji said with a smile: "If you are thirsty, you won't treat him badly." ”