Lu Bu summoned Huang Chengyan, and Huang Chengyan looked a little panicked.

Huang Chengzong is his eldest brother, although when he was younger, the relationship between the two was not very good.

But in any case, that's also his own big brother.

And now, Huang Chengzong has been convicted and has just been beheaded.

Well, fortunately, Huang Chengzong is not an official, so Lu Bu treated the people of the Huang family only by cutting off their heads, and did not peel the skin and wash the grass.

Not only Huang Chengzong, but also his sons and grandsons were all beheaded.

Fortunately, the emperor was still merciful and left a month for the Huang family, giving them the opportunity to pass on the ancestry.

Otherwise, the eldest brother's branch will really be extinct.

Facing the miserable end of the eldest brother, Huang Chengyan was very sad.

But after Huang Chengyan learned what the eldest brother's branch did, he felt that they deserved it and were completely to blame.

And now, the emperor summoned himself.

Is it because of the matter of his eldest brother, and he blames himself?

Therefore, after seeing Lu Bu, Huang Chengyan couldn't help but kneel on the ground, and said with sincere fear: "Your Majesty, Brother Weichen has done such a thing that angers people and complains about it, and Weichen is very frightened, and he hopes that the emperor will punish the ministers. ”

Lu Bu reluctantly picked up Huang Chengyan and said to him: "Guozhang, this matter is not your fault, what does it have to do with you?" I have called you here for the next step of scientific research. ”

Actually, Lu Bu was a little sorry for Huang Chengyan in his heart.

In any case, Huang Chengzong is Huang Chengyan's eldest brother after all!

As early as when he was the county guard of Wu County, he fooled Huang Chengyan to Wu County.

Over the years, if it weren't for Huang Chengyan's dedication to studying science and technology, how would Dahua have developed to such a point?

The development of Dahua is due to Huang Chengyan's indispensable contributions.

If Huang Chengzong hadn't robbed the people's daughters by taking people's lives, Lu Bu would have turned a blind eye to it.

But helplessly, what Huang Chengzong did was too much and unforgivable.

……

Hearing Lu Bu's words, Huang Chengyan knew that the emperor had summoned him not to reprimand him, but for the next scientific research topic. Huang Chengyan couldn't help but be interested all of a sudden.

Huang Chengyan's greatest pleasure in his life is scientific research.

Therefore, after hearing the emperor's words, Huang Chengyan couldn't help but ask excitedly: "Your Majesty, I don't know what topic we are going to study next?" ”

Lu Bu couldn't help but say: "Guozhang, the next step is to study the topic, and I am going to start with hot air balloons and diesel cars. ”

At present, the research on electric vehicles has come to an end, and I am afraid that it will come out soon.

It's just that electric actually still has a lot of flaws.

For example, if the next attack on Cao Wei is the next step, electric cars will not be very good.

The most important thing is that there is no place to charge it!

Once the battery runs out, the electric car can't run.

Therefore, although Lu Bu's attitude towards the development of science and technology is like the goal of energy conservation and environmental protection.

But diesel cars, it is still necessary to study them.

Of course, this diesel car, Lu Bu decided to use it only for military purposes.

As for civilian use, it is still all electric vehicles.

After the advent of diesel cars, there was no need for so many cavalry.

Dahua could have formed a convoy specifically to restrain the cavalry.

With the cavalry's bow and arrows, he couldn't break through the defense of the car at all, and he couldn't outrun the car, so he was absolutely restrained.

Of course, you also need a shooting window to be able to attack.

Lu Bu pondered, should he load a three-bow bed crossbow on the car and shoot with a powerful crossbow?

Well, well, actually, it's a car, and this shape is basically running for the function of a tank, which can be called a steel chariot.

Well, there are not too many such steel chariots, as long as there are a thousand, you can absolutely hang all kinds of cavalry.

As for dealing with infantry, that's even more so for you.

Of course, this kind of steel chariot is suitable for field battles, and it may not be so useful when attacking cities.

But it doesn't matter, the next scientific research goal is hot air balloons.

Lift off with a hot air balloon, strike in the air, and ignore the walls directly.

Both a blow can be thrown from the air, and it can be directly airborne.

In this way, no matter how strong the city wall is, it will be turned into scum under the attack of the hot air balloon.

Hearing the emperor's next scientific research topic, Huang Chengyan's eyes lit up at first, and then he pondered for a long time and asked: "Your Majesty, how do you control the direction and control the lifting of the hot air balloon you said?" ”

Under Lu Bu's explanation, Huang Chengyan understands the principle of hot air balloons.

Because Lu Bu lanterns can be lifted into the air, there is nothing difficult to understand in principle that a balloon can be lifted into the air through heating.

As long as this balloon is large enough and stable enough, it can carry people into the air.

But what puzzled Huang Chengyan was, how could this balloon come down when it floated into the sky?

It won't be said that once you attack the city, the people on the hot air balloon won't be able to get off, right?

Will it float in the sky forever?

Also, how can you control the direction?

If you can't control the direction, how can you attack accurately?

The hot air balloon is really not very easy to control the direction, because it has no power setting and cannot change the direction on its own.

But it's not that there is no way at all, there are still some ways.

It can be controlled by the elevated altitude, as the airflow varies from altitude to altitude.

Of course, the most important thing is to look at the direction of the wind.

This is also a defect of hot air balloons, if you want to attack the city, you must first grasp the wind direction, be in the upwind outlet, and then use the hot air balloon to attack the city.

But at this point, in fact, the problem is really not too big.

Anyway, the siege of the city, your city is here, and you can't run away if you want to.

I just have to wait for the right wind and then I can attack.

Therefore, hot air balloons are clearly the best siege weapon at present.

At this stage, it is obviously unrealistic to want to build an airplane.

If there is another ten years of development, it may be possible to build a simple glider.

Next, Lu Bu explained the principle of hot air balloon to Huang Chengyan.

After listening, Huang Chengyan's face couldn't help but show excitement.

Because this hot air balloon, in fact, the principle is not complicated, compared to the power station and the steel chariot, this is simply too simple.

It is also highly operable, and it only takes a lot of experiments to gradually master the technology.

The emperor is really amazing, I really can't think of how the emperor's brain circuit is rising.

How can you think of so many unbelievable things?

It is believed that after the advent of hot air balloons and steel chariots, it will be effortless to dominate the world!

Now, Huang Chengyan can't wait to see that day come!

(End of chapter)