Now Zhang Hao is no longer the king of skin in the eyes of teachers and parents, his academic performance has improved by leaps and bounds, especially in science.

Because of the need to study model aircraft, Zhang Hao has completed high school mathematics, physics, chemistry and other courses, and even borrowed a lot of university textbooks from the library.

Although Zhang Hao has not yet graduated from junior high school, he has reached the high school level in terms of his knowledge reserve, except for the weak liberal arts, Zhang Hao's science is the top in the school, and he has won the first place in the whole grade for two consecutive years, which makes the teacher happy.

Now Zhang Hao is the captain of the school, and he also serves as the class president, and he is an excellent three-good student.

No one could have imagined that when he was in elementary school, the teachers and parents had a headache, and the skin boy who made trouble every day would have such a big change, seeing that his son had such a chance, Zhang Jianguo smiled so much that he couldn't close his mouth, and at the same time, he was also glad that he listened to Song Yuanchao's persuasion and did not stop Zhang Hao from engaging in model aircraft.

Unpacking the match box, Zhang Hao looked at it carefully with interest, but shook his head after reading it.

"What? Dislike? Song Yuanchao asked curiously.

"It's beautiful, it's real, but it's a pity." Zhang Hao put the exquisite car in his hand aside and sighed, he had seen and heard of this thing, but it was the first time he took it in his hand today to take a closer look.

I thought I would give myself a little surprise, but who would have thought that in addition to the realistic shape and fine workmanship, this toy has basically zero technical content. Even if Song Yuanchao gave him a car similar to Yangyang that could wind up and run by himself, in Zhang Hao's eyes, such a structure was too simple.

After listening to Zhang Hao's explanation, Song Yuanchao laughed dumbly, but it is normal to think about it, a quasi-professional student of model aircraft pays attention to this thing of course different from ordinary people, ordinary people look at the model, but he pays attention to technology, and naturally comes to a different point of view.

"Brother, I actually like this gift, its workmanship is very good, it's ...... than I imagined." Speaking of this, Zhang Hao grinned: "Thank you, brother." ”

"You kid still come to this with me?" Song Yuanchao couldn't cry or laugh, touched his head and said: "I didn't think about this, I knew that it would be better to get you some small motors or something, maybe you like these more." ”

"Okay!" Zhang Hao's eyes suddenly lit up, and he said excitedly: "Brother, if you really want to have such a way, you really have to get some for me, by the way, I still need small radio control equipment, this is the most difficult to get, now the power currently available on the market is too low, and the performance is not good, I ran a lot of places and didn't get it." ”

"Do remote control?" Song Yuanchao thought for a moment and asked rhetorically.

Zhang Hao nodded vigorously, and suddenly thought of something and got up and pulled Song Yuanchao upstairs.

Song Yuanchao followed Zhang Hao to the second floor with a smile, Zhang Hao took Song Yuanchao into his room, and when he entered, Song Yuanchao was stunned when he saw the layout in the room, because this room is no different from a tool room except for the bed that sleeps like a bedroom.

The bed is on the left side of the door, and there is a bookshelf next to the bed, which is densely packed with all kinds of books and magazines, most of which are science and engineering majors and have knowledge about model aircraft, and even some books and magazines on aerospace and ships, among which there are also some books on military industry.

】

On the other side of the bed, there was a large desk. Except for part of the vacant space on this desk, which should be used by Zhang Hao to do his homework, the rest of the space is stacked with many kinds of model aircraft parts and tools and equipment, such as electric soldering irons, screwdrivers, small vices, files, scissors, carving knives of different sizes and lengths, etc.

On the wall opposite the bed is a wooden shelf standing on the top of the sky, on which there are more than a dozen model aircraft of different sizes, and the model aircraft assembled in the middle Song Yuanchao is familiar, and when he gets closer, isn't it the one he bought when he accompanied Zhang Hao to Yifeng?

"Brother, come and see this." Zhang Hao moved out a monoplane from the side to greet Song Yuanchao, this plane is a wooden structure, but it is very exquisite, Zhang Hao is very proud to say that this plane is the wood he personally selected He spent half a year to make, unique on the market.

The whole plane is not small, the wings are spread out for about 1.7 meters, and the fuselage is much larger than Zhang Hao's whole person.

The plane has been painted, and the whole body is painted sky blue and white intersecting, and it looks very beautiful.

What made Song Yuanchao pay attention was not only the shape of the plane, but also the power structure of the plane, which means that it can fly on its own.

Zhang Hao told Song Yuanchao that this aircraft uses a 2.5cc two-stroke model aircraft engine, which is produced by our country, which is much stronger than the original 1.5cc power, and this is an improved Dongfeng system, which is the best model aircraft engine that Zhang Hao can find at present.

The principle of the model aircraft engine is basically the same as that of the normal internal combustion engine, except that the size is much smaller, and some adjustments have been made in the design considering the use of the model aircraft.

In addition, the engine of the model aircraft does not use gasoline and diesel, most of them use kerosene and methanol, that is, alcohol.

According to Zhang Hao, the theoretical flight of his aircraft can last for about 20 minutes, which is very advanced in this era.

At present, most of the model airplane competitions adopt the method of line control circumferential racing, which is to use a line to operate the model airplane to make it race in a circular circle.

Now the world record of this competition is in the hands of the Chinese, and in addition to this record, our country also has 66 other world records, leading the world.

But Zhang Hao's plane did not carry out line operation, but took a very bold remote control control.

In later generations, remote-controlled aircraft were very common, and the most representative of them was drones. But in this era, because of the limitations of radio technology, remote control operation of model airplanes is still very advanced technology, Zhang Hao used a lot of brains in this regard, and finally tinkered with such an incomplete model airplane.

"Have you ever flown a test flight?" Song Yuanchao listened to Zhang Hao's explanation with great interest and looked at this beautiful model of the airplane.

"Of course!" Zhang Hao replied proudly.

"How did it turn out?" Song Yuanchao asked again.

At this time, Zhang Hao's expression was a little lost, and he shook his head and said: "Flying in an open field is so-so, and the speed is not as fast as the online control." It's not the engine problem, the main thing is that the weight of the aircraft is larger than that of the line-controlled model aircraft, and the speed is easy to get out of control. The height is the same, mainly because the remote control device does not meet the requirements, and it will even ...... if the weather is bad or the terrain is more complicated and there are obstacles. ”

As he spoke, Zhang Hao made a falling gesture, and Song Yuanchao smiled and nodded to show that he understood.

Although the technology of this aircraft is still immature, mainly limited to the current overall technology, it is very surprising that Zhang Hao can achieve this level of model aircraft.

"Today's weather is good, why don't you go outside and have a look?" Song Yuanchao saw that Zhang Hao's expression was a little downcast, and suggested with a smile.

Zhang Hao glanced out the window, it was about one o'clock in the afternoon, the sun outside was very good, and there was no wind.

"It's a good day, but there's no place nearby." Zhang Hao thought for a while.

It is best to fly a model airplane in an open field, such as a stadium or something, the urban area is full of buildings, although it is not like more than 20 years later, there are high-rise buildings everywhere, but Huhai is a city with a large population and housing tension, even if it is a place where ordinary residents live, it is densely packed, plus the greening of Huhai is good, especially the old French concession for decades or even nearly a hundred years of tung trees can be seen everywhere, these are not suitable for model airplanes to fly.

"Silly boy, isn't there a playground in the conservatory? Let's go over there. Song Yuanchao laughed and patted him on the shoulder, Zhang Hao was stunned for a moment, and then suddenly realized.

Rowling had studied at the Conservatory of Music before, and Zhang Hao's family was less than a mile away from the Conservatory, so it was very convenient to walk there

As a professional college, ordinary people are definitely not allowed to enter, and now that it is winter vacation, there are no more people in the conservatory except for some faculty members.

Song Yuanchao had accompanied Luo Lin and Lin Yan here a few times before, and he had long been familiar with the doorman.

took Zhang Hao to the place, knocked on the closed window of the guard's room, and handed over a pack of cigarettes directly with a smile.

Of course, the doorman knew Song Yuanchao, and he was very happy to see Song Yuanchao, and he chatted with Song Yuanchao for a few words.

After Song Yuanchao told the uncle that he wanted to borrow the playground of the college to fly the model airplane, the doorman agreed and opened the door to let Song Yuanchao and Zhang Hao in.

After thanking the uncle, Song Yuanchao took Zhang Hao along the small path inside and walked straight forward, walked more than 100 meters and made a bend to the playground of the college.

It is said that it is a playground, in fact, it is more accurate to say that the lawn, the Conservatory of Music is a famous professional college in Shanghai, this lawn was there when the school was established, and now the winter can not see the lush greenery in spring and summer, the lawn is a little dry and yellow, but the place is very large, and there is no problem in flying the model airplane.

When he arrived at the place, Zhang Hao began to assemble the model airplanes he brought.

Model airplanes can be disassembled, otherwise such a large model airplane can't be held in your hand, right? It's inconvenient and easy to bump into.

It took a while to install the aircraft module, Zhang Hao checked it carefully, and after checking that there was no problem, he began to inject kerosene, and when the fuel was filled, Zhang Hao did the final inspection before take-off, and after a little debugging, he looked up and said to Song Yuanchao: "Brother, no problem, you can start flying." ”

"It's up to you!" Song Yuanchao made an encouraging fist pinch on the side, Zhang Hao nodded vigorously, turned on the switch of the remote control, and when the remote control light turned on, he took a deep breath, and then started the engine of the model airplane.

The engine began to hum, the propeller was driven by the engine from forbidden to slow and then spun rapidly, because of the drive of power, the plane parked on the lawn drove forward, Zhang Hao held his breath and concentrated on operating the plane with the remote control device in his hand, when the power of the aircraft reached a certain level, the nose of the plane was raised, and it flew towards the sky.