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.

(); &;For Si Guxin, he knew that it was great to be able to build a turbojet engine by hand, but he only knew that it was amazing. He is a principal of an aviation school by profession and has an understanding of aircraft, but it also has its limits.

Hu Wenhai always claimed that it was a toy, in his opinion, it was a toy with many uses, and the country's economy was in difficulty, so it was helpless to temporarily replace training with toy model airplanes.

But whether this turbojet engine is good or not, and how good it is, he only has a vague impression of this. I know it's good, but I can't say what's good, and I can't say what it's good to.

In order to move the professionals, that is, Director Wang, he had already dismantled the turbojet engine on the model aircraft and sent it to Shengjing.

The KJ66 small turbojet engine is an excellent design that has been eliminated from the market for decades and finally dominates the field of jet model aircraft. This small turbojet engine can only provide 2.5 kg of thrust in the original model, and can provide 12 kg of thrust in the latest model, which can be said to have been designed to the extreme under the condition of ensuring amateur hand-made. Its thrust-to-weight ratio of up to 8 can even kill the second- and third-generation aircraft engines in seconds.

As the so-called layman looks at the excitement and the insider looks at the doorway, Director Wang can't help but be interested in it after studying the design of KJ66.

On the one hand, in order to meet the needs of personal DIY, kj66 cannot use materials that are difficult to obtain, and the processing accuracy and difficulty must be at an ordinary level. On the other hand, it is its excellent performance and low cost.

This contradiction is rare to get a perfect compromise on KJ66, in the eyes of Director Wang, where is this toy, it is clearly a flash of genius!

According to his understanding, the person who can design this kind of horizontal engine must have a deep attainment in aero engine technology. I can't say, it's the work of an old engineer in Xiucheng? But the aero-engine circle is so big, I haven't heard of anyone whose hometown is in Xiucheng.

If you remove the ones who are still at work, you will have even more of them.

Director Wang didn't think about Hu Shiwu, but although he was an eighth-level worker and had participated in several aeronautical engineering battles, he was just a worker after all, how could he make such an innovative product.

Until this moment, even if he heard Si Guxin's personal confirmation, he still couldn't believe it.

"Brother Si, what did you say? The designer of the small turbojet engine you sent is this young man?"

Si Guxin nodded with a wry smile and said, "At first, I didn't believe it, Hu Wenhai's grandfather was Hu Shiwu, you should remember it, right? I began to think that this engine was his grandfather's work......"

"It's unlikely, Lao Hu's knowledge structure can't make this kind of design. Director Wang came to a categorical conclusion.

"Yes, I later found out that I had misunderstood. Si Guxin sighed a little embarrassedly and said, "Who would have thought that it would turn out to be such a little guy who is only in the second year of high school!"

Director Wang looked Hu Wenhai up and down, nodded incessantly, and greeted: "Yes, your name is Hu Wenhai, right? Come, come with me, and tell me how you designed this engine." ”

"Hello Grandpa Wang, I'm also fooling around, where can I be worthy of your praise like this......"

"It can't be said that the simpler the thing, the more great wisdom it hides. It's not that no one has ever done turbojet engine downsizing, but I haven't seen it like yours!"

Director Wang took Hu Wenhai's hand and couldn't wait to turn around and walk into the office building. Si Gu Xin couldn't close his mouth with a smile, and followed behind the two of them with a figure-eight step. Only the driver Xiao Jiang was left standing alone in front of the gate, he scratched his head, shook his head and said: "Hey, you can design a turbojet engine, no wonder Tsinghua University doesn't pay attention to it." ”

According to his thoughts, Hu Wenhai said that going to the National Defense University and the Chinese University of Science and Technology is probably also a pretext.

With this kind of genius, studying abroad is also a breeze.

In China in the 80s, first-class talents were always yearning to go abroad. It doesn't matter if you go out or not, but you have to go out anyway. It's not that this is anything to worship foreigners, but the social atmosphere at that time was like this, and China at this time really needed to draw nourishment from abroad to catch up with the trend of the world.

"I've noticed that the performance of your engine hasn't been fully tapped yet. For example, this bearing, although you use a very good product, it still can't meet the design needs, right?"

Director Wang pulled Hu Wenhai directly into his real room, and a set of turbojet engines made by him was placed on the real platform in the middle. All kinds of testing equipment are filled with real platforms, and the number of inspections is also painted on the blackboard on the entire wall.

Obviously, after Director Wang got this engine, he had already tested and analyzed it in detail. And as a professional, his question was to the point.

"If it were exactly as I designed, the engine would have revved at more than 100,000 rpm. Hu Wenhai said with some regret: "But as Director Wang said, although I used the best bearings I could find, it was a pity that it still failed to meet the requirements." This time, I came with Grandpa Si in the hope that Director Wang could help us and continue to improve the performance of this engine. ”

"I know that you plan to use model airplanes as drones instead of real aircraft training. Director Wang nodded, sighed and said, "Now that the country's economy is in difficulty, there is no way to do it. ”

"Yes, but after all, a model airplane is a model airplane, and the maneuverability of the real aircraft cannot be fully simulated. We just want to make the simulation machine as close to the performance of the real machine as possible. ”

"It's not easy, and a big part of training in flying a fighter jet is getting familiar with the fighter engine. When will it stop, when it may stall, how to change the tailspin ......"

"Grandpa Wang, you misunderstood. Hu Wenhai hurriedly waved his hand and said with a wry smile: "The simulated aircraft is just a supplement to pilot training, and these advanced courses you mentioned must still be trained on the real aircraft of the flight wing." Our realistic machine is mainly used for beginners and pilots to maintain their daily status.

It's just that Grandpa Si and I both hope to be able to make the simulation machine as perfect as possible. ”

Director Wang nodded thoughtfully, "Well, that's a good idea. Although it is not a substitute for real machine training, it can at least be used for hand training and tactical verification. ”

"Yes, that's what we mean. Hu Wenhai struck while the iron was hot, and then said: "If you want to simulate the real aircraft with a model aircraft, you must increase the output of the engine, optimize its flight parameters, increase the density of the whole aircraft, and reduce the thrust-to-weight ratio of the whole aircraft to the level of the real aircraft." Everything else is easy to say, but only this engine optimization is really not up to the task with my ability. ”

"This ......"

Speaking of this, Director Wang looked embarrassed and sighed: "It's not that I don't want to help, it's just that to be honest, I have never been in contact with engine downsizing projects, and I have not accumulated this before." On top of that, in my opinion, the design of this engine is already so good that I don't know where to start for a while. ”

Sigu News blew his beard and glared: "Lao Wang, what are you still modest at this time? It's not easy for my old man to beg you, you are a big scientist in a national research institute, and you can't even change a child's design?"

"I can't change it, I really can't change it. Director Wang spread his hands and said helplessly: "In my opinion, this engine is already an extremely mature product." Any change from any one place will lead to excessive cost and manufacturing difficulty, and the performance improvement will be minimal. This is not only me, yesterday I went to the 606 Institute to ask someone to see, they specialize in the study of engines, and they did put forward a lot of opinions. ”

"For example, the use of titanium cast blades allows them to withstand higher temperatures and increase the efficiency of engine operation. You can also use oil film extrusion bearings or high-energy nozzles, but the problem is that if you do this, the cost of the engine will be skyrocketing. However, the resulting increase in performance is not at all proportional. The best way to do this is to keep the current design intact and reduce the wear and tear of the production technology on the design. ”

"So how do you reduce the loss of design in production?"

Director Wang said: "I don't know, I'm not the designer of the engine, how do I know where there is room for improvement in the current product?"

Speaking of this, Si Guxin and Director Wang turned their heads to look at Hu Wenhai in unison. After all, this engine came from him, and he knew best what performance it should have. In this case, how to give full play to its potential, it is natural to listen to his opinion.

Hu Wenhai touched his chin and thought for a while. Suddenly, his eyes lit up, and he raised his eyebrows and said: "To put it mildly, improving the performance of the engine is actually very simple, as long as you increase the speed of the blades." Increasing the speed without altering the existing design should make it possible to replace the bearings. ”

Director Wang vetoed: "But the bearings you use are already the best on the market." ”

Si Guxin glanced at Director Wang in surprise and asked, "That's just a product on the market, and you 601 doesn't have a better one?"

Director Wang smiled bitterly and nodded: "Yes, yes, but it is so easy to achieve miniaturization." And the bearings we use, I'm afraid your simulation machine can't afford it. ”

"That's just as well. Si Guxin feels that the problem is back to square one, can't the model aircraft really become a simulated machine?

Hu Wenhai hesitated for a moment, he had a solution in his heart, but there was no example in later generations, so he was a little unsure whether it was feasible: "Actually, I have an idea, maybe you can use air bearings." In any case, to increase the weight of the aircraft, instead of using iron to counter the weight, it is better to put a can of compressed air on it. ”

"Air bearing......" Director Wang pondered for a while, and nodded a little hesitantly: "Perhaps, this is a way." ”

(); &;

Remember for a second, wonderful novels can be read at any time, mobile phone users please visit wèn. The latest chapter of the high-speed debut empire toys,This chapter is,The address is//,If you think this chapter is not bad, please don't forget to recommend it to your friends in the QQ group and Weibo!