Mid-July.

Wenxian Pavilion Military Academy has officially opened.

This is the fifth and perhaps the last class since the establishment of the college. Because after this session, Lu Bu will launch a war to unify the whole country, and if the war is won, a large number of disarmaments will be carried out, and at that time, the military academy will not have much effect.

As a teacher at the Military Academy, Zhang Liang was also a little reluctant.

Speaking of the generals under Lu Bu, almost all of them were his students.

His position in the military aircraft department is rising, and the orders he gives can be carried out smoothly. If there is no military academy in the future, I don't know if there will be such prestige and honor.

The Military Academy opened.

Lu Bu went to see it twice, but he didn't show up.

His current mind is all on the affairs of the Academy of Science and Technology, Cha Heshen, and the bank.

Zha Heshen and the bank have a shadow commander Nie Zheng, but there is no need for Lu Bu to intervene personally.

So.

His energy now is on hard rubber matters for the time being. Every day at noon, I will go to the Institute of Science and Technology to understand the process of researching hard rubber. It was only after evening that he returned to the Thorn Mansion.

this day.

Lu Bu, as usual, came to the Academy of Science and Technology again.

As soon as I entered, I smelled a smell of gelatin!

To be precise, it's a plastic smell.

Lu Bu came to the place where he studied hard rubber and saw Ma Jun burning a piece of black paint with fire. Lu Bu ran over and asked urgently, "Is this...?" ”

"Back to my lord, this is the first thing we deployed. Inside the gum, a large amount of charcoal powder and a small amount of saltpeter powder are added. After boiling, let it cool. It will become the shape we want, and its softness and degree of resistance to external forces are very similar to what the Lord said. ”

Ma Jun replied.

"Saltpeter and coal?" Lu Bu said in surprise: "Why didn't I think of it." The plastic smells like coal, and it's very flammable. There are these two things. ”

Lu Bu didn't know that the main materials needed for plastics were extracted from petroleum and carbonaceous compounds. Although the hard rubber made by Ma Jun is somewhat different from that of later generations, it already has the function of hard rubber. He can also withstand huge external forces and can make tires.

"Hahaha..."

Lu Bu laughed a few times and said excitedly: "Just follow this manufacturing method to make a few tires for me..." ”

"What is a tire?"

"Tires are..." Lu Bu walked to a room in the distance, drew a model of a tire with paper, handed it to Ma Jun, and said, "This is the tire, I need to use him instead of the iron wheels of the truck." ”

After Ma Jun saw it, he shook his head and said, "This... I'm afraid I can't bear it, right? The things carried by the trucks are thousands of pounds, to say the least. ”

Lu Bu said with a smile: "Of course I can't bear it like this, but the inside of the tire is hollow, let's get an iron tire inside and wrap it with hard rubber." When you want to use it, you can use four or eight tires at the same time, won't he be able to withstand gravity? ”

"Uh..."

Ma Jun thought about it carefully, and said with a happy face: "Yes, in this way, all the tires will be stressed at the same time, and they will definitely be able to replace the iron wheel." The lord is really smart and wise, and his subordinates admire him! ”

"Hurry up and get seven or eight out, I'm going to give it a try." Lu Bu commanded.

"Yes."

Ma Jun saw the dawn of success and became interested in plastic tires.

Lu Bu sat in the hut in the distance, watching the workers of the Science and Technology Institute, making new tires step by step. A tire-sized model is fired with pig iron, and then the boiling plastic is poured into the model. After the plastic has cooled, it is then separated from the model.

With Lu Bu's command, the tires made are similar to those of later generations. It's just that it's still a little lacking in quality. But Lu Bu has already thought about it, it's a big deal to use a few more tires, which can also bear the weight.

"Well, it's okay...."

When it was almost dark, Lu Bu saw that the eight tires that had been made were born.

Lu Bu said: "Make eight softer, flatultent tires and eight iron tires and put them in plastic tires. I'll wait for someone to get a truck, and you can put the tires under the truck. I'll come over tomorrow at noon to test.... ”

"No." Ma Jun responded.

After the instructions, Lu Bu left happily.

All night, the workers of the Science and Technology Institute did not dare to rest, and were busy getting tires.

Listening to what Lu Bu said seems to be very simple.

When they actually do it, they know that it is very complicated.

The iron wheels under the truck are connected by a huge iron rod. Now with tires, you have to replace them completely. There is also a steam engine that drives the tires, which requires a link of mechanisms.

Ma Jun worked all night to make all the parts.

It took another afternoon to install it on the truck.

When everything is done...

Ma Jun sent someone to report to Lü Bu and boiled the water in the steam engine.

When Lu Bu rushed to the Science and Technology Institute, the water was boiling. Some obstacles in the square were also cleaned up by the workers, waiting for Lu Bu to test the car.

"My lord. When you change to plastic tires, the speed of the car will increase, so you should be careful. Ma Jun was a little worried.

"Don't worry, I know what to do."

Lu Bu sat down on the truck and started the steam engine.

This thing doesn't have a clutch. It's just the brakes and the steering wheel. Moreover, instead of a round steering wheel, it is two iron rods. Up is starting, down is parking. To the left and right is to grasp the direction.

Then there's a foot brake, and when you press it, there's a fast iron against the tires underneath to slow down.

Overall, it's fairly scientific.

Titicaca...

After the steam engine started, Lu Bu drove the car around the square.

It feels much lighter than before, and the speed has more than doubled. And there is no roar of iron wheels pressing on the stones, and sitting in the cab, there will not be much vibration.

"Well, the design of this tire did not disappoint me, and it really worked."

After walking around the square, Lu Bu returned to the same place.

He now thinks that the truck is exactly the same as the modern one, except that it is less painted and looks a little shabby. He said, "Get some more black and green paint and paint the whole truck." With paint, he won't rust. ”

"Yes."

Ma Jun nodded.

"Also, this tire... I'm satisfied. You're ready to start making it in large quantities. I need him not only to equip the new army, but also to equip the local army. Lu Bu said.

"Yes. The subordinates are determined to be conscientious. ”

Ma Jun felt that he had something to do again. How many tires do you need for thousands of trucks? If you equip the local army, the number of tires is really impossible to count. And this thing can't be handed over to others to make, it can only be made by the Academy of Science and Technology itself, so as not to leak the news.