Xiao Zhen opened the outer box of the Devil Commander assembly set and naturally began to assemble it very carefully, slowly removing various parts from the template, and then assembling it into a mini four-wheel drive.

Although the action looks rusty, but in general it is still orderly, after all, there is more than half a year of experience in assembling Lego models, but it is still difficult to install the gears on the motor head and the front and rear axles.

After carefully operating before and after more than fifty minutes, we can see that Xiao Zhen's head is already covered with small beads of sweat, and this seems to be the thing that Xiao Zhen is most focused on.

However, after it is done, it will feel that the assembly process is actually simple. After all, the key parts of the whole mini 4WD are three: the motor area, the gear drive, and the switch area.

First of all, the body and some guide wheels are removed from the template, and then the two spindles are inserted into the corresponding holes on the body, and the transmission gears are installed to the corresponding positions on the shaft at the same time, and the front and rear transmission rods are installed, which is considered to be the gear transmission area is installed.

The next step is to assemble the motor area according to the requirements of the drawing and install it at the end of the bottom plate, and bend the copper wire of the switch in the switch area according to the requirements, and the switch debugged to the bottom can control the translation of the copper wire to cover the cover of the switch area.

Finally, the two guide wheels in front are attached and the body is installed, so that the four-wheel drive vehicle is assembled.

Of course, some cars also have a rear guide and a side guide, but the installation method is the same as the front guide wheel. After installing the battery, you can experience the feeling of running on the track in a 4WD vehicle that you have assembled yourself.

When most of the four-wheel drive cars received the battery to start, Mr. Wen came to the track and taught everyone how to collect the four-wheel drive car by hand, because the four-wheel drive car is generally around the track for 2 to 3 laps and then timed, so at the end of 2 or 3 laps, you need to catch the four-wheel drive car with your hand and turn off the switch, and this process requires a certain amount of courage.

Because the 4WD runs very fast on the track, catching the speeding 4WD may hurt your hand.

However, Mr. Wen said: "We are now using an ordinary motor, so the speed will not be very fast, the impact force will not be very painful, and the body is also plastic, so it is very easy to catch, and the real competition of the FRP dragon head and phoenix tail is stronger." ”

However, in the end, there were still two girls who did not dare to pick up the four-wheel drive car she assembled by herself, and Xiao Zhen learned how to catch the four-wheel drive car after three exercises.

Teacher Wen went on to say: "Every year there is a mini four-wheel drive competition in the school, but they are all well-equipped mini four-wheel drives, and the mini four-wheel drive cars are equipped with excellent motors and light bodies and fiberglass dragon heads and phoenix tails or aluminum dragon heads and phoenix tails are considered to be better body and kinetic energy configuration, and the guide wheels have a variety of options such as small iron balls and large iron balls." Finally, of course, you can't use the tires you use today, but thin tires made of aluminum metal. ”

After taking a sip of water, Mr. Wen said: "Of course, what I just said is just the configuration of the school's first-class drivers, and there are many other areas that can be improved, such as the copper wire of the switch can be replaced with silver wire or platinum wire, and the motor can also be replaced with a self-made motor type, and the weight of the body can also be reduced, or some modifications can be made through aerodynamics." ”

So, then Xiao Zhen's children all felt that Mr. Wen was like Dr. God in "Four-wheel Drive Brothers", after all, Mr. Wen seemed to be proficient in all kinds of mini four-wheel drive equipment.

Next up was last year's school's champion mini 4x4 driver who gave a presentation to the students in the interest class with his car.

First of all, he ran three laps on the classroom track with his car, and Mr. Wen narrated on the side: "This is Zhang Yunlong, the champion of the mini four-wheel drive car competition in the school last year, I hope everyone can also learn from Zhang Yunlong, of course, if you don't understand anything, you can also ask him for advice." ”

"I'm Zhang Yunlong in the sixth grade, my mini 4WD is currently the top in the school, and I also won the second place in the city-wide competition, but I was not ready in the provincial competition, and I accidentally burned the motor at that time, so I didn't get a good result, but I believe you will be luckier than me, and you will go further than me. ”

Zhang Yunlong said. "Please pay attention to every detail, although the mini four-wheel drive is a simple mechanic, but it is a very test of your patience, only by calming down and adjusting the whole state of the mini four-wheel drive, you can be a qualified mini four-wheel drive driver, you can be fearless in countless spectators, you can stand out in the mini four-wheel drive competition. “

Then Zhang Yunlong left the classroom.

"Zhang is in the sixth grade and needs to prepare for the junior high school, so he can only stop these activities temporarily. I hope you can leave no regrets in the model airplane class, the status of the mini four-wheel drive car has declined in the current model airplane competition, after all, its internal structure is very simple, and a lot of competition is the gap in equipment. However, other models, such as model boats, are more expensive, on the one hand, because of the complex transmission structure, and on the other hand, the gap between various materials is endless. However, regardless of whether you participate in the competition or not, I hope that everyone can gain something in the model aircraft class, and the next class will be explained by Mr. Zhao about the application of microscopes. Next, please clean up the table by yourself. “

So, Xiao Zhen threw all the plastic belts and other garbage into the basket, and looked at his "masterpiece" Devil Commander in a daze.

He also wants to stand at the top of the school like Zhang Yunlong and become a mini 4x4 champion. However, it seems that Zhang Yunlong's mini four-wheel drive car is completely different from his. However, Xiao Zhen believes that one day he will succeed. "Alright, that's all for today, see you next week. Teacher Wen said.

And Xiao Zhen kept looking at his devil commander, and even forgot to get out of class.

Teacher Wen watched the students almost go, and Xiao Zhen still kept looking at the devil commander in a daze. So, Mr. Wen went up and patted Xiao Zhenzhen on the shoulder and said, "Do you like Commander Devil very much?" Then if you have time, you can disassemble and assemble this training handlebar a few more times, first of all, you must be proficient in the structure of the whole car, and understand where each gear is located, and the car will run more stably. The next step is to learn how to maintain the car and apply lubricating oil on time. Okay, it's not too early, I'll send you home where you live. ”

As soon as he got out of the school gate, Xiao Zhen saw Lao Wu waiting on the side of the road, and Teacher Wen saw Xiao Zhen running straight to Lao Wu, so he also ran to Lao Wu and said, "Your child is very talented and very focused on doing things." ”

Lao Wu naturally said proudly, "Of course, I cultivated it." ”

After a few words of greeting, Xiao Zhen said goodbye to Mr. Wen and followed Lao Wu home for lunch, and after the wind and clouds finished eating, Xiao Zhen began to disassemble and assemble all kinds of mini four-wheel drive vehicles, and was busy until the evening. After dinner, the little real action did not stop.