Why do men like excavators?

Maybe it's because it looks cool, mechanical and powerful. At the same time, it can also use its robotic arm to cause great damage to buildings like Transformers.

When Jiang Jiuling said that it was an excavator, the old principal suddenly became interested.

It was a wood shell, and while it wasn't the same as the old excavators he'd seen before, it wasn't wrong to say it was an excavator since it had tracks and buckets.

He wanted to move it up to see the chassis, but he didn't expect this excavator toy to be quite weighty.

At least seven or eight pounds.

"This toy is well done. The old principal Shi Fengguo praised loudly: "Although the shell is made of wood, the shape is very neat. The wheels of the crawler and this robotic arm are also decent. ”

Jiang Jiuling had a question, "You said it's a toy?"

"Isn't it?"

Jiang Jiuling directly picked up the remote control.

The original two remote controls have been dismantled by Jiang Jiuling, and then a new one has been made from a wooden box.

Now the remote control hangs behind the excavator, making it look a bit like a decorative storage toolbox.

Turn on the remote control switch, and then turn on the power switch on the excavator, and after a few seconds, Jiang Jiuling waved the remote control in his hand, "Principal, this is a remote control excavator, the kind that can move." ”

The old principal's eyes were obviously full of disbelief, and there was a "show me if you move" unbelief.

And then the excavator really moved.

In a fairly smooth sound of mechanical operation, the excavator on the ground first ran forward with a crawler rotation, and then made another 360-degree turn on the spot and returned to its original position.

If it is said that making a U-turn on the spot is the signature skill of the excavator, and this skill is perfectly simulated by the small wooden shell excavator in front of you.

When Jiang Jiuling pressed a few buttons above the remote control, the excavator realized that the crawler did not move, the upper body working platform rotated 360 degrees, and stretched out the bucket to make a digging action in mid-air.

The old headmaster was completely dumbfounded.

His mind seemed to have been stirred by the bucket of an excavator. His perception of toys was completely shattered by the seemingly simple wood-shell excavator in front of him.

In China in the nineties, excavators were far less popular than those of later generations, and there were excavators in large and small projects. In this era, domestic excavators are extremely rare, and there are also backward mechanical excavators.

Now the excavators are imported, and there are not necessarily a few in the entire Wu City.

Now there is a teenager who has made a model that can be operated remotely and can do the same digging action as a real excavator?

How did he do it?

The old headmaster had never seen a toy like it, and he couldn't even see the model in front of him.

The old principal hurriedly grabbed the phone, not to the security department, but to the classroom office, "Ask Teacher He Tongxin to come up." ”

"He's in class?"

"There are more than ten minutes before the end of class, you go to the classroom and call him to let the students study on their own. ”

......

In less than five minutes, Teacher He Tongxin came at a trot.

"Principal, are you looking for me?" Mr. He Tongxin is a physics teacher in the third year of high school, he is not only in charge of the physics class of the graduating class, but also one of the people in charge of the newly built science and technology building of the school.

Usually the school has science and technology competitions, and he also leads the team.

A few months ago, the first middle school also sent students to participate, but they were defeated by the second middle school, of course, this may also be related to the fact that the gold content of the city-level competition trophy is not so heavy.

"Come and see this. The old principal took a step sideways so that Teacher He Tongxin could see the model on the ground.

He Tongxin was half a professional in the end, and he recognized the model in front of him as an excavator at a glance. After seeing Jiang Jiuling's demonstration operation, the expression on his face was even more wonderful than that of the old principal before.

"You...... How did you manage to turn 360 degrees on the spot?"

"It's very simple, just take advantage of the speed difference between the two sides. Jiang Jiuling handed the remote control to Teacher He Tongxin, although this remote control is a little simpler, it takes a certain amount of skill to control the operation of the mechanical arm. But the four keys to control the direction are extremely simple.

Forward is pressed together with the two forwards, and when turning, the left is forward and the right is backward together.

After He Tongxin got started a little, his face was like a treasure, "Magical operation, wonderful design." If we had this excavator model a few months earlier, would they have been able to snatch the first prize in the Municipal Science and Technology Competition?"

It seems that Mr. He Tongxin attaches great importance to honor, and he is unwilling to give up even the city-level competition.

He Tongxin looked at Jiang Jiuling with bright eyes, and blushed with excitement, "What class are you from, what is your name?"

"......" the old principal blushed and coughed twice, "He was originally from the second middle school, and he was ...... In the original science and technology competition, his team won the first place. ”

This time it was Mr. He Tongxin's turn to blush, but fortunately he heard the word "original", and he said embarrassedly: "That...... Do you want to transfer to No. 1 Middle School now?"

Seeing Jiang Jiuling nodding, Teacher He Tongxin hurriedly patted his chest and said, "No problem, any school is very welcome to a good seedling like you." Let's come to our class, I'm the class teacher. ”

"Ahem~ Teacher He. The old principal Shi Fengguo seemed to have a cold, and kept coughing, "If he doesn't enter the school, let me ask you first, what do you think of the model in front of you?"

"Do you still need to ask?" As Mr. He Tongxin spoke, he had already put his hands on a few buttons to control the bucket.

"Aside from the fact that the wooden shell is a little unsightly and the cowhide tracks are not realistic, it's one of the best student tech pieces I've ever seen. ”

He still hasn't figured out how to use the keys, but that doesn't stop him from having fun.

His mind was now full of questions, especially wondering how this young man managed to control such a complex mechanical operation by remote control.

Let's not talk about moving forward or backward.

The excavator's mechanical arm has three telescopic mechanisms that can be moved, plus it can rotate the working platform 360 degrees, that is four.

Teacher He Tongxin took the students to assemble a remote control car and knew the control problems in it.

So he wondered if there was some new model drive device from abroad. Just like the servo of a remote-controlled car, you don't need to use your brain, you can just install it and use it.

Teacher He Tongxin was about to ask, but the excavator model that he had enjoyed playing with suddenly slowed down, and then quickly remained motionless.

He thought it was bad, and his heart was beating wildly, and Jiang Jiuling told him that it was out of power.

Because I couldn't find a suitable battery, I had to use the most common No. 1 battery in the store to make up the number.

The battery is the cheapest voltaic battery, the kind of battery whose shell is so soft that you can pinch it with your hand, and the storage capacity is extremely impressive.