Chapter 690: Takeof
Today, Zhang Hao is no longer the naughty boy in the eyes of his 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 on his own, and even borrowed a number of university textbooks from the library.
Although Zhang Hao has not yet graduated from junior high school, his knowledge reserves have reached the high school level. Except for his weakness in liberal arts, Zhang Hao is the best in the school in science. He has been ranked first in the grade for two consecutive years, which makes his teachers very happy.
Now Zhang Hao is the school's captain, monitor of the class, and an outstanding three-good student.
No one could have imagined that the naughty boy who caused so much headache to his teachers and parents when he was in primary school and who fought against fake products and made trouble every day would have such a big change. Seeing his son have such a promising future, Zhang Jianguo couldn't stop smiling. At the same time, he was also glad that he listened to Song Yuanchao's advice and did not stop Zhang Hao from making model airplanes.
After opening the MATCH BOX, Zhang Hao looked at it carefully with great interest, but shook his head after reading it.
"What? You don't like it?" Song Yuanchao asked curiously.
"The thing is very beautiful and made very realistically, but it's just a showpiece." Zhang Hao put the exquisite car in his hand aside and sighed. He had seen and heard of this thing, but today was the first time he held it in his hand and took a closer look.
He originally thought that it would give him a little surprise, but who would have thought that this toy, apart from its realistic shape and fine workmanship, had basically no other technical content. Even though Song Yuanchao gave him a car similar to Yangyang's that could be wound up and run by itself, in Zhang Hao's eyes, such a structure was too simple.
After listening to Zhang Hao's explanation, Song Yuanchao burst out laughing, but it was normal when he thought about it. A student majoring in model aircraft certainly pays different attention to this thing than ordinary people. Ordinary people look at the appearance, but he focuses on the technology, so naturally he comes to a different point of view.
"Brother, I actually like this gift very much. It's well made, but it's smaller than I thought..." At this point, Zhang Hao grinned and said, "Thank you, brother."
"You kid are still trying to trick me?" Song Yuanchao didn't know whether to laugh or cry. He touched his head and said, "I didn't think about this. If I had known this would happen, I would have gotten you some small motors or something. Maybe you would like these more."
"Great!" Zhang Hao's eyes lit up immediately, and he said excitedly: "Brother, if you really have such a way, you really have to get me some. Oh, I also need a small radio control device. This is the most difficult to get. The power of the ones available on the market is too low, and the performance is not good. I went to many places and couldn't get it."
"Remote control?" Song Yuanchao thought for a moment and asked back.
Zhang Hao nodded vigorously, suddenly thought of something, stood 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. As soon as Song Yuanchao entered, he was stunned when he saw the layout of the room, because except for the bed that looked like a bedroom, the rest of the room was no different from a tool room.
The bed is on the left side of the door. There is a bookshelf next to the bed, which is densely packed with various books and magazines. Most of them are about science and engineering and knowledge about model aircraft. There are even some books and magazines on aerospace and ships, and there are also some books on military industry.
There was a large desk near the bed. Except for a part of the empty space where Zhang Hao usually did his homework, the rest of the space was filled with various aircraft model parts and tools, such as soldering irons, screwdrivers, small vises, files, scissors, and carving knives of different sizes and lengths. At first glance, it looked like a machine repair room in a factory.
On the wall opposite the bed was a floor-to-ceiling wooden shelf with more than a dozen aircraft models of different sizes placed on it. The assembled model aircraft in the middle looked familiar to Song Yuanchao. He walked closer and saw that it was the one he had bought when he accompanied Zhang Hao to Yifeng.
"Brother, come and see this." Zhang Hao moved a monoplane from the side and invited Song Yuanchao to have a look. The plane was made of wood, but it was very delicately made. Zhang Hao said proudly that he personally selected the wood for the plane and it took him half a year to make it. It was the only one of its kind on the market.
The entire aircraft is quite large, with a wingspan of about 1.7 meters, and the fuselage is much larger than Zhang Hao himself.
The plane has been painted, with the entire body painted in sky blue and white, which looks very beautiful.
What caught Song Yuanchao's attention was not only the shape of the plane, but also the fact that it had a powered structure, which meant that it could fly on its own.
Zhang Hao told Song Yuanchao that this plane uses a 2.5CC two-stroke model aircraft engine, which is produced in our country. It is much more powerful than the original 1.5CC engine. Moreover, this is an improved Dongfeng series and is the best model aircraft engine that Zhang Hao can find at present.
The principle of a model aircraft engine is basically the same as that of a normal internal combustion engine. Apart from being much smaller in size, some adjustments have been made in the design considering the use of model aircraft.
In addition, model aircraft engines do not use gasoline and diesel, but most of them use kerosene and methanol, which is alcohol.
The engine of Zhang Hao's model aircraft uses kerosene, so it has strong power and air-staying ability. According to Zhang Hao, the theoretical flight of his aircraft can be maintained for about 20 minutes, which is very advanced in that era.
Currently, most model aircraft competitions adopt the line-controlled circular racing method. This method uses a line to operate the model aircraft to make it race in a circle.
Now the world record of this competition is in the hands of the Chinese. In addition to this record, our country also holds 66 other world records, leading the world.
But Zhang Hao's plane was not operated by wire, but instead adopted a very bold remote control operation.
In later generations, remote-controlled aircraft are very common, and the most representative of them is the drone. But in this era, due to the limitations of radio technology, remote-controlled aircraft models are still very advanced technology. Zhang Hao put a lot of thought into this aspect, and finally tinkered with such an unfinished aircraft model.
"Have you ever test-flown it?" Song Yuanchao listened to Zhang Hao's explanation with great interest, looking at this incredibly beautiful airplane model.
"Of course!" Zhang Hao replied proudly.
"What's the result?" Song Yuanchao asked again.
At this time, Zhang Hao looked a little disappointed, and shook his head and said, "It's okay to fly in an open field, and the speed is not as fast as the wire control. It's not the engine's problem, but the main reason is that the weight of the aircraft is heavier than the wire-controlled model aircraft, and it is easy to get out of control at high speeds. The same is true for the altitude, mainly because the remote control device does not meet the requirements. If the weather is bad or the terrain is complicated and there are obstacles, it may even..."
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 due to the limitations of the current overall technology, it is already very surprising that Zhang Hao can make the model aircraft to this level.
"The weather is nice today, why don't we go outside and try flying it?" Seeing that Zhang Hao looked a little depressed, Song Yuanchao suggested with a smile.
Zhang Hao glanced out the window. It was about one o'clock in the afternoon. The sun was shining brightly outside and there was not much wind.
"The weather is nice, but there is no place nearby." Zhang Hao thought for a while and said.
It is best to fly model aircraft in an open space, such as a stadium. There are many buildings in the urban area. Although there are not high-rise buildings everywhere like there will be in more than 20 years, Shanghai is a city with a large population and tight housing. Even the places where ordinary residents live are crowded. In addition Shanghai has good greenery, especially in the old French Concession, where decades or even nearly a hundred years old Tong trees can be seen everywhere. These are not suitable for flying model aircraft.
"Silly boy, isn't there a playground in the music conservatory? Let's go over there." Song Yuanchao laughed and patted his shoulder. Zhang Hao was stunned at first, then he suddenly realized.
Luo Lin was studying at the Conservatory of Music before. Zhang Hao's home was less than a mile away from the Conservatory of Music, so it was very convenient to walk there.
As a professional college, ordinary people definitely cannot enter, and now it is winter vacation, there are not many people in the music college except some faculty members.
Song Yuanchao had come here several times before with Luo Lin and Lin Yan, and had already become familiar with the security guard.
He took Zhang Hao to the place, knocked on the closed window of the guard room, and handed over a pack of cigarettes with a smile.
Of course the security guard knew Song Yuanchao. He was very happy to see him and chatted with him for a while.
After Song Yuanchao told the old man that he wanted to borrow the college's playground to fly a model airplane, the security guard agreed immediately and opened the door to let Song Yuanchao and Zhang Hao in.
After thanking the old man, Song Yuanchao took Zhang Hao and walked straight forward along the small path inside. After walking more than a hundred meters and turning a corner, they arrived at the college playground.
It is more accurate to call it a playground, but it is actually a lawn. The Conservatory of Music is a famous professional college in Shanghai. This lawn was there when the school was first built. Now in winter, the lush greenery of spring and summer is no longer visible, and the lawn is a little withered and yellow, but the place is large, so there is no problem in flying model aircraft.
When they arrived at the place, Zhang Hao began to assemble the model aircraft he brought.
Model airplanes are all detachable, otherwise you can't hold such a large model airplane in your hand, right? It's inconvenient and easy to bump into it.
It took some time to assemble the model airplane. Zhang Hao first checked it carefully. After checking that there was no problem, he began to inject kerosene. After the fuel was injected, Zhang Hao did a final check before takeoff. After a little debugging, he looked up and said to Song Yuanchao: "Brother, there is no problem. We can start flying."
"It's up to you!" Song Yuanchao made an encouraging fist gesture. Zhang Hao nodded vigorously and turned on the remote control. When the light on the remote control came on, he took a deep breath and started the engine of the model aircraft.
The engine began to hum, and the propeller was driven by the engine to rotate from slow to rapid. Driven by the power, the plane parked on the lawn moved forward. Zhang Hao held his breath and concentrated on operating the plane with the remote control in his hand. When the power of the plane reached a certain level, the plane raised its nose and soared into the sky.
