Remember for a second, wonderful novels can be read at any time, mobile phone users please visit wèn.

Remember for a second, wonderful novels can be read at any time, mobile phone users please visit wèn.

(); After Hu Wenhai started to assemble the parts on the table one by one, Hu Shiwu found that it was really just a toy, as he said.

In principle, this is an authentic turbojet engine, where compressed air ignites the fuel, and then the expanding air is ejected backwards through the impeller – no matter how advanced the turbojet engine principle is.

But this kind of aero engine, which is specially developed and used for high-speed aviation aircraft, sounds very tall, and in Hu Wenhai's hands, it seems that it only has the function of a toy.

Because it is so "small", the total length is probably no more than 25cm, and the net weight may be about 1kg. Hu Shiwu swept it with his eyes, and gave such a set of numbers in his heart.

How much thrust does this micro turbojet engine produce? two kilograms, or three kilograms? What it can propel, that's a model airplane.

Thinking of this, Hu Shiwu couldn't help but blow his beard and laugh. This grandson of his own family is indeed a little messy and fun-loving, but this mechanical talent is worthy of the old Hu family's species!

Other people's second-year high school children, no matter how ingenious they are, they just use monkey skin bands to make a wooden model airplane. But what about his eldest grandson, Hu Wenhai? No matter how simple and compact this turbojet engine is, if it were someone else's child, maybe he would not have even heard of it!

High school students build aero engines, if this is really done, they can't get a newspaper, radio news or something? Thinking about it this way, our old Hu family really wants to show their faces now!

"Good grandson, what are you going to do here? Grandpa will give you a hand!" Hu Shiwu asked with his arms rolled up his sleeves and stared at the parts in Hu Wenhai's hand with great interest.

"Well, I really need your favor here. Hu Wenhai clapped his hands, stopped the assembly work, pointed to the semi-finished product in front of him and said: "The turbine blades of the compressor need to be dynamically balanced, and this depends on the feel of your eighth-level worker!"

"Dynamic balancing?" Hu Shiwu was stunned for a moment, and asked in surprise: "I said good grandson, how much do you want to achieve the speed of this engine, and you actually want to do dynamic balancing?"

The so-called dynamic balance refers to the structural tremor of the turbine compressor due to the imbalance of the shape and weight of the blades during the rotation of the turbine compressor blades. This kind of tremor is not a big problem when the rotation speed is low, but if the rotation speed of the blade is very high, it will lead to the instability of the blade operation.

According to Hu Shiwu's estimate, if the thrust-to-weight ratio is 2 to 3, the blade speed is less than 10,000 revolutions, and the dynamic balance is of little significance.

Hu Wenhai scratched his head and replied: "The bearing material of this engine is not up to standard, I estimate that 80,000 rpm should be the limit, right?"

"80,000 revolutions!" Hu Shiwu was taken aback after doing the math, doesn't that mean that the thrust-to-weight ratio is at least 5 to 6? Such an engine of nearly one kilogram can provide about six kilograms of thrust.

If the thrust-to-weight ratio of the whole aircraft is converted to 0.5, the model aircraft can achieve a weight of 12 kilograms - is this still a model aircraft?

"Hey-hey-hey-" The iron door at the door of the workshop was opened, and a plane was gently pushed in by two people in the backlight.

Hu Shiwu weighed a delicate compressor roulette in his hand, the roulette is quite well made, and the stainless steel texture has been polished and heat treated after processing, and there is a feeling of enjoyment in his hand.

To do dynamic balancing, it is normal to need professional test equipment and calculation formulas. This kind of product development cannot be done in general factories, because the dynamic balance formula requires senior engineers to design and develop, and the products produced in the factory are all ready-made formulas and debugged equipment.

But it's not without workarounds, what was the highest achievement of machining accuracy in the 80s? No, in fact, this laurel still belongs to human beings.

In particular, a legend like Hu Shiwu, for other workers who had to rely on the machine to determine the balance, only needed to use his fingers and ears.

Because to put it bluntly, the so-called dynamic balance is to make the weight of each blade of the entire wheel consistent, and the center of gravity of rotation is just at the center of the wheel. Hu Shiwu weighed it with his hands, and he could determine which side of the roulette wheel in his hand was heavier and which was lighter. Then just use a tool to grind off part of the weight of the blade, or correct the curvature of the blade, which is simply easy for Hu Shiwu's hands.

Hu Shiwu handled the dynamic balance of the roulette wheel in his hand, and Hu Hu and Lu Daming pushed a model airplane more than one meter long and ran into the workshop.

Twin hair and double vertical tail variable swept wings, wing body fusion, air intakes on both sides, beautiful and slender neck like a swan - it is said that the excellent aerodynamic layout is first of all beautiful, Hu Shiwu feels that the shape of this model aircraft is full of indescribable beauty.

It's just such a beautiful plane, but the paint is really a little unsure of how to complain. The gray paint of the green head and green tail gives people a sense of slag dropping.

"This plane looks a little familiar, it doesn't seem to be from our country, right?"

"The American F-14 fighter jet, hehe, has been changed to the livery of our national air force. Hu Wenhai smiled a little embarrassedly.

"This green-headed ......" Hu Shiwu thought about it, but still didn't say the adjective that followed.

"**No, combat effectiveness is five!" Hu Wenhai laughed, ran to the side of this F-14 model aircraft, and gently lifted the shell of the rear fuselage.

Hu Shiwu blows his beard, and there is really no way to take his eldest grandson. Since he was able to walk and talk, Hu Wenhai has come up with all kinds of unclear words from time to time. But to say that this kid is playful but can't say it, as an old man over half a hundred years old, Hu Shiwu's eyes Hu Wenhai is playing around, and he always feels that there is a calm heart hidden.

Hu Wenhai's "nonsense" is not simply for "play" like other children. Let Hu Shiwu say that in his appearance of "nonsense", there is a sense of enjoying life in his eyes.

Yes, Hu Wenhai gives people the feeling that he is enjoying and experiencing this kind of playfulness. Rather than learning about the world through playfulness, as other children do. To him, there seemed to be no secrets in this world that he needed to know.

This is probably the difference between a genius and an ordinary person. Hu Shiwu smiled proudly as he watched Hu Wenhai put a set of engines that had been assembled into the interior of the F-14 model aircraft.

The shell looks very light, and it should have been knocked out of the aluminum alloy sheet stolen from Hu Wenhai's father's 501 factory. In these years, the management of state-owned enterprises and factories is not good, let alone the factory director's office, even ordinary workers go home by the production of scraps, which is too normal.

There are three landing gears under the fuselage, and it seems that they can also be received in the belly of the fuselage. In the shell of the lifted fuselage, a lot of equipment has been installed at this time. Two sets of ferronickel batteries are housed in the belly of the aircraft, connected to the aircraft's servo motors.

This makes it look as if the model has a very advanced fly-by-wire flight control system - but that's just an illusion, with three reinforced signal modules and antennas placed in the nose of the F-14 to receive attitude control on every rudder surface.

There is no way, Hu Wenhai also wants the computer to automatically make the attitude control of the plane. But after rummaging through the embroidery city, I couldn't find a programmable microcomputer chip. In these years, even old antiques are rare in China, and it is really beyond his ability to expect to use electron tubes to achieve such complex control.

What is Hu Wenhai's ability?

In the 80s, when there was a lack of entertainment, it was almost impossible for people to be otaku even if they wanted to. But no matter when and where, human beings always have to find fun for themselves. Young people in the eighties had their own way of fun and leisure. It doesn't matter if there are no cartoons and American dramas, what is more popular these days is >

Radios, model airplane modifications, electronic circuits, and even kite racing. If you were born and grew up in the 70s and grew up in the 80s, having dexterous hands is definitely a plus.

But Hu Wenhai is even more different than these amateur geeks, he is the ultimate > to return from the next thirty years

Yes, Hu Wenhai is a reborn. One day after the New Year, I woke up and suddenly found that I was reborn back in the seventies. If you can't toss it so hard, won't you live up to this beautiful year, beautiful era and beautiful sky?

In order to make up for a geek heart that was deeply involved in the trivial things of life in his previous life, Hu Wenhai can be said to be the essence of "tossing" in this life.

In his previous life, he was the son of a family of engineers, but at the age of forty, he became the chief engineer of the Ningbo Wafer Factory that "disguised as a battery factory of a car company". Regarding his career choice, Hu Shiwu, who was in his eighties at the time, was saddened for several years.

But this does not mean that Hu Wenhai has no interest in machinery at all. In fact, influenced by the family environment, he is also very talented in mechanical design.

In the early years, when there was no Guoke network in China, he had already organized a group of like-minded fans, pondering all kinds of DIY "big toys". Like this F-14 model aircraft equipped with a miniature turbojet engine, he is one of the first players in China, and he has designed and built a set by himself 100%. He has long been familiar with the various numbers of the F-14, and the model aircraft he made is definitely a high-imitation product.

It's just that he didn't have time to play a few times after he finished that year, just in time for his work to enter the tense stage, and then he solved a series of production problems of the company, and then promoted and raised his salary to enter the peak of his life. In his thirties and nearly forty years old, he married a beautiful bride who had just graduated from college, and the next year his wife gave birth to a beautiful and lovely daughter for him.

But in Hu Wenhai's heart, after all, there is always a geek's soul burning.

Born again, he didn't have much to pursue, and only thought about one thing. That is, no matter what, in this life, you must round it and "toss" it hard!

The city will play, sleep high!

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