Beijing, Dongcheng.

"Oh..."

"It's flying!"

Bursts of children's cheers rang out, and occasional adults on the side of the street were amazed, and cyclists stopped to look at the sky.

A black-painted, more than one-meter-long non-compound helicopter, with a buzzing rotor noise, emitting a puff of green smoke from time to time, is flying at a uniform speed at the height of the treetops, and below it is a group of chasing children.

"Get out of the way."

A monkey-faced child carrying an antenna in the shape of a World War II walkie-talkie rushed out of the street corner screaming.

"Qian Fen, the remote control distance is enough, don't run so fast, I'll beat you to death if you break it."

Deputy commander-in-chief Huang Datong shouted anxiously in the back, so he put together a repeater, and if he fell, it was gone.

"Woooooooooooo

There was a roaring sound of crawlers turning, and three models of giant tanks, smaller than the park's bumper cars, burst out with puffs of green smoke, and a distinct smell of kerosene could be smelled between the noses.

Yang Wei, who was wrapped in a rice dumpling all over his body, Shi Shiran turned out from behind Huang Datong, followed by several middle-aged and young men and women.

He looked up at the operating state of the helicopter model, and then at the three large tanks in a daze, and was quite satisfied with today's test.

Because of its simplicity, the tank model is not mass-produced with generic parts, but is a custom and hand-hammered out experiment.

The 5-cylinder head carburetor engine made by the helicopter pilot model is simple in structure, the primary cost is not expensive, the material and labor hours cost less than 60 yuan, the rated speed is 2500-28000RPM, the full power fuel consumption is 8 ml per minute, and methanol kerosene and diesel can be burned.

However, the aircraft engine cannot adjust the fuel intake without a sub-oil needle, and the idle speed is too high to fall when landing, and the measured fuel consumption is up to 25 milliliters per minute.

The suspension system and gearbox of the big tank are customized, and the other parts are made of handmade materials, plastic, metal and wood boards, but the surface is painted with a layer of paint, and the turret cannot be turned, which looks a little dull and looks weird to walk.

It is said that it is the first test, in fact, the internal test has not stopped, and today it is displayed on the street to stimulate the morale of the friends.

At present, relying on the bear army itself, it is not possible to mass-produce this remote control model, not limited to technology, but too many components, too long man-hours, not suitable for students to assemble.

Just an antenna rack comes out, and as soon as it is turned on, many TVs around it will be snowflakes,There is no ready-made RC modulation signal,The remote control is not a proportional switch,It's just a simple four-channel to try to use first。

As soon as it came out, it was a radio frequency drive servo, which interfered too much with neighbors.

In the 80s, playing with a remote control model that burned oil, the technology itself was not difficult, it was a matter of assembly, stamping metal or engineering plastics to make universal parts, just like Lego bricks to assemble.

360-degree rotation of the turret, high and low movement of the turret, flame launch, etc. can be simulated, and the same is true for helicopters.

What is now spelled out is a hand-ordered suspension gearbox in the client's factory, and then the bears cut the wooden planks and aluminum and iron shells themselves, which look extremely simple.

In order to make a broken tank, there were several industrial accidents, and the little hands were cut a lot, and I cried when I saw blood, annoying to death.

The vehicle model that is really suitable for students' manual mass production is still the motor class, otherwise you have to equip the school with alcohol gauze red potion or something, then it will really become a sweatshop.

Fuel-powered helicopters are currently more of a display level, and the cost of opening a mold alone is too high, Yang Wei has not considered whether to do it or not, not because he is afraid of cost, but mainly because he is afraid that oil burning is prone to safety accidents.

The quality control of the workshop of the domestic factory is not good at present, the things are relatively rough, the military products are all picked out, and it is good to knock them out alone, but the heat rise rate of this material is not well controlled, and the plane is still leaking oil.

The estimated specifications are even more uneven, and he is a little bottomless in his heart, but the motor power and battery are not good, and the larger ones can't be moved, and they can't move after two flutters.

However, for the artificial simulated engine sound that children now have to push with their hands and "woo woo" in their mouths when playing with a model, the current handmade helicopter and large tank models are already bluffing things at the zenith level.

It's much more powerful than the kind of small train that runs in circles on predetermined plastic rails sold in people's stores, and has a kind of steampunk rough beauty.

It's just that the appearance is a bit earthy, it's not finalized, it's not a generic part, it's just a hand-knocked out to motivate morale.

The model that is really suitable for the promotion of manual classes, selling things that can be increased, is Yang Wei's choice, and the high-end is mainly made to bluff people, and the same as the supercar concept car, it must be all money-losing goods.

"Hey, you little guys are amazing, you can really make you do it."

A middle-aged parent looked up at the helicopter in the sky and couldn't help but praise it, but turned a blind eye to the big oil leakage of the plane.

"yes, who would have thought that this would really fly."

Another chubby parent echoed in surprise, and didn't expect one bite at a time.

"Uncle Wang, Uncle Liu, Uncle Qian, Aunt Guo, if you don't have your help, why would our dream come true?"

Yang Wei smiled, but he didn't take credit at all.

"Dare to think and dare to do, amazing."

A fat man called Uncle Qian gave Yang Wei a thumbs up, "Yang Wei, you kid is a head material, turn our family's money around, the stupid boy almost didn't tear down the house in order to compete for the qualification to run errands." ”

Qian Fatzi was on duty in the fifth machine department, and was forced by his son to cry, make trouble, and hang himself, and contact the factory everywhere to customize accessories for the children.

The key son's slogans are set one by one, and it is obvious that children can say one, two, three, four, five, which is very inflammatory, so that he somehow treats it as a serious matter.

Who knew that a bunch of kids could really get the plane out, which was really beyond expectations, and it looked quite bluffing.

"It's not, our Xiaomu is talking back at home about what Yang Wei said, your leader."

Aunt Guo, who was dressed a little fashionably, quipped, "Grandparents, parents don't listen to a word, but they firmly support your instructions." ”

"You two are wronged people, not to wronged me, but to despise your own children, Qian Fen and Chang Mu are both for the common ideal, others don't believe that a group of children can fly hope, you two parents don't believe it, then it really breaks the wings of your children's dreams."

Yang Wei seemed to be talking about something that was no longer ordinary.

"It's true."

Uncle Wang, who spoke first, agreed with him, and Aunt Guo and Uncle Qian were also shocked when they heard this, and they were a little stunned for a while.

"Thanks to a few parents like you."

Yang Wei followed with a sentence, "Amazing, you can see at a glance that you can't step on the wings of children's dreams, Kaizi, Chang Mu, Xiao Chang, Da Wei, Qian Fen, each of us is like blades and gears, the plane can't fly without a part, the tank can't move, we are a whole, a team, you are such a reasonable parent, is the driving force that drives us forward, who can not lack you, otherwise there will be no motivation." ”

Several parents are laughing, and they are indeed a little proud in their hearts, after all, their children have proved that they are not fooling, Aunt Guo and Sun Rong are quite compatible, and they are closer to Yang Wei, and said with a smile: "You can't let your kid pour ecstasy soup anymore, this is another way to send a job, today your Aunt Guo asked for leave and ran out, just to get a task to see what kind of moth you are doing." ”

"Yes, Yang Wei, how about your little gang take one of us to a meeting?"

Uncle Qian hurriedly interjected, it was not a secret that a group of children had mysteriously made a gang, but even the plane really came out, and the parents were all shocked, and then they muttered, and sent a representative over as soon as they discussed.

Otherwise, if you let these scared children come out of a big basket, you will regret it.

"That's it, Yang Wei, the unity of your little brothers is commendable, but this secrecy is a bit too scary, those of us who are parents inquire about each other, and a pair of confessions find that none of them have the same statement, which is more scary than a tight tone, and they have learned to induce, and they don't do anything bad, do you still need to hide it from your parents?"

Uncle Liu is a public security officer, and he was the first to understand that something was wrong.

At first, I thought that the children were playing, and the parents chatted about the same thing, but then the parents came to Yang Wei's house to pick up the children and talk more before they figured out the taste, it turned out that each child has its own tasks, and the things targeted are different, and the focus is different.

What does this mean, this shows that the operation is carried out in an organized and planned manner, and there is a whole set of careful deployment, and what is particularly strange is that a group of children actually have a source of funds, and what is even more strange is that none of them are asked for from their parents.

Uncle Liu didn't believe it at first, if it wasn't for the side inquiry, it was indeed a group of children tossing by themselves, and the parents who came to pick up their children only saw a group of children getting together and making trouble, and there was no sign of external intervention, so he almost started an investigation.

Because it's really not like a group of children can do something, let alone a group of children about seven years old, adults may not be able to do it.

Raise funds to purchase materials on the market, organize small groups to make parts, make all kinds of models and strange things according to the drawings, and then half-sell and half-force them to classmates and surrounding schools, return funds, and then expand production.

Two months down to the machinery factory to customize the suspension and engine, the relationship is very accurate, the road is too wild, really through a group of children's parents respectively contacted the factory to make things.

Thanks to the model aircraft and tanks flying today, let these boys do it mysteriously, and I don't know what big moves can be made.

"Datong, it's over."

Yang Wei shouted to close the team, turned his head and smiled at the person next to him, "Uncle Liu, we have team rules, I will convey the requirements of your few people to the team, if everyone agrees, of course there is no problem." ”

Please be better than excited, excited will not be as good as temptation.

Yang Wei's arrangement is to wait for parents to take the initiative to ask for it, not to post it and ask for help.

He had been waiting for this moment for a long time.