"Let something like a bird fly?" He Yongyan was stunned for a long time and said.

"Did you ever play with bamboo dragonflies when you were a kid?" Li Changfeng tried to continue to guide.

"What is a bamboo dragonfly?"

"Find a stick, and the prince will make one for you right away."

A moment later, a wooden stick was taken.

Li Changfeng asked the guards for a dagger, and made a bamboo dragonfly on the spot.

"Let's look at the angle of the two blades first."

He Yongyan took the bamboo dragonfly and looked at it carefully, and said suspiciously: "Both fan blades have an inclined angle, but what's the use of this?" ”

"Give it to me."

Li Changfeng wanted to return the bamboo dragonfly, put it in the palm of his hand and rubbed it, and when he rubbed his head, he released his palms, and the bamboo dragonfly spun and flew up.

He Yongyan stared at the bamboo dragonfly and was stunned at the beginning.

Li Changfeng didn't bother and waited quietly.

When the bamboo dragonfly landed, He Yongyan's eyes suddenly burst into an astonishing look.

"Got it!"

"Your Highness, I understand!"

"Make two large fan blades, rotate quickly with the engine as the power, and tie something like a hanging basket underneath, so that you can carry people and goods!"

Speaking of this, He Yongyan's face turned red with excitement, and his hands danced.

"That's right! That's right, that's it! As long as the power is enough, it can fly like a bamboo dragonfly! ”

"Oh my God! That's a great idea! If only such a machine could be built, people would be able to fly freely in the sky! This will definitely change history and go down in history! ”

At this time, He Yongyan even had a picture in his mind, and an unprecedented desire surged in his heart.

Li Changfeng knew that the similar helicopter he envisioned in his mind was more difficult to manufacture than an extended-wing aircraft at this stage, so he reminded: "No, it's not something like a hanging basket, it has to look like a bird, so it is more aerodynamic." ”

Accidentally, Li Changfeng threw out a professional term.

He Yongyan wondered: "What is aerodynamics?" ”

"Hmmm......"

Li Changfeng pondered the wording for a while, and guided it in the simplest way: "You can understand it this way, for example, if you use a knife to slash a target, it feels very easy if the blade is aimed at the target, but if you use a knife to shoot the target, you will feel resisted, can you understand?" ”

"Understood! But why is that? ”

He Yongyan frowned and looked puzzled, and without waiting for Li Changfeng to mention something, he asked tentatively: "The air resistance of the blade is small, and the air resistance of the blade is large?" Are the wings flat like all birds? ”

"That's right!"

Li Changfeng patted He Yongyan on the shoulder, very satisfied with his comprehension ability.

Then he pulled him towards the research center.

"As for how to design the plane, this prince already has some ideas, let's draw a few pictures and discuss it."

Almost without thinking, Li Changfeng drew a sketch of a propeller aircraft.

In the previous life, the first nuclear bomb used in actual combat was detonated in the Japanese Invaders.

This item went down in history, caused huge casualties, and rewrote the nuclear bomb data of the entire world history, and Li Changfeng still remembers it clearly.

The bomb weighs about 4.9 tons, is 3.6 meters long, and has a diameter of 1.5 meters.

Therefore, Li Changfeng drew a sketch of this aircraft, and the approximate dimensions marked were based on the idea that it could fit a nuclear bomb, and he made special requirements for He Yongyan to be able to fit something of such weight and volume.

He Yongyan didn't think much about it, and thought that Li Changfeng asked for it in consideration of the need to carry goods and people.

Then there are more sketches, and Li Changfeng gave a detailed introduction in the key details.

It wasn't until dark that Li Changfeng finished introducing the key points.

"Okay, that's basically it, you follow this line of thought to study, if you have any questions, come to this prince at any time to discuss, remember, this is your most important research topic at present, and leave the other research to others." Li Changfeng advised.

"Don't worry, Your Highness, I'm only interested in airplanes now, and no one can stop me from researching airplanes!" He Yongyan said excitedly.

"Okay, it's not early, this prince is going home, you should rest early."

Li Changfeng got up and was about to leave, but was stopped by He Yongyan.

"Your Highness, may I ask, how did you come up with these miraculous things? Why can't we think of it? I think I'm smart enough, but I feel like nothing compared to you! Many times, we feel that the wisdom that Your Highness has is not what a normal mortal should have! Are you really God? ”

He Yongyan looked depressed.

Li Changfeng was a little helpless.

This is the crystallization of a hundred years of human wisdom in the previous life, but he didn't come up with it, and to be honest, he really didn't have that ability.

However, this must not be said to He Yongyan.

Li Changfeng smiled and patted He Yongyan on the shoulder: "This prince is not a god, all he can think of is two words, observe!" ”

He Yongyan looked suspicious: "Observation? It's as simple as that? ”

"Yes, it's that simple!"

Li Changfeng began to flicker.

"The propellers of the ironclad warship can propel the ship forward in the water, why not in the air? The small toy bamboo dragonfly for children proves its viability! Birds can fly in the air, and the difference between them and airplanes is that they can incite their wings, but the purpose is to have power, so we can use the engine to provide power, can't we fly? ”

Hearing this, He Yongyan fell into deep thought.

Li Changfeng continued: "This is the idea that this prince conceived of the plane, in the final analysis, it is through observing the things we can see in daily life, understand? ”

"Understood, Your Highness, your observation is really strong!"

He Yongyan gave a thumbs up, his eyes full of adoration.

Li Changfeng smiled and left the scientific research institute.

……

Three days later.

Next to the Changfeng Automobile Store, another store has opened.

There are four big characters on the door: Changfeng truck.

This time, there was no publicity, not even an opening ceremony, and the door was opened quietly.

But even so, when the door opened, there was a crowd outside.

Some of them are businessmen who have already gotten the news, they have long heard that Li Changfeng is engaged in trucks, and they have also imagined using cars to pull goods, so they have been paying attention to this matter.

In addition, there were also some people who were specially sent by Li Changfeng to inform those businessmen and magnates who had participated in the construction of the Daqian railway network, the Daqian highway network, and the construction of the new hydropower station.

They were given the right of first refusal.

Considering the use nature of the truck, and its cost is indeed very low, Li Changfeng kept the profit very low, and the price of each truck was only 2,800 taels of silver.

Li Changfeng now has too much silver, and he is no longer interested in earning more silver, and the most important thing at present is to promote the process of industrialization of the cadres as soon as possible and assist in the manufacture of nuclear weapons.

This price made all the businessmen and magnates who came to buy a big sigh of relief.

Trucks: They are going to be purchased in bulk.

If the price is too high, they really can't afford it.

(End of chapter)