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

(); The so-called air bearing is to replace the bearing ball with air to bear the load and "lubricate".

High-pressure air enters from one section of the bearing and is then ejected from the other end. Under the impact of high-pressure gas, the inner and outer walls of the bearing will be separated from the actual contact and remain in a "suspended" state.

Speaking of the principle does not seem complicated, the Americans have already made a breakthrough in the application of air bearings in the fifties. For China, however, by the 80s it was still a cutting-edge field.

With its extremely high service life, load speed, heat generation, machining accuracy, etc., air bearings can be said to surpass the characteristics of ordinary bearings, which has established its position in high-end applications.

However, there is one of the biggest problems that has hindered its adoption in most fields, and that is the complexity of air bearings. Different from ordinary bearings, the composition of the whole air bearing is not only the bearing itself, but also the attached compressor, expander and circulator and other air supply and circulation equipment, which greatly increases the application cost of the air bearing.

Hu Wenhai's idea is not groundless, in fact, in the 21st century, there have been many successful examples of the application of air bearings in aero engines. The air compressor provides part of the function of air compressor, which greatly simplifies the complexity of air bearings in aero engine applications.

Director Wang recalled, but still shook his head and said: "But at present, only Modu 993 Factory can produce air bearings in China, and they don't have products that can be applied to aero engines." ”

"You can let the 501 factory develop this product, and you don't need to do any auxiliary air compressors, just directly equip a compressed air tank to supply gas. Anyway, a flight of the simulated aircraft is two or three hours, and a 2kg compressed air tank is enough. Instead of having to change a set of mechanical bearings every time you fly, the cost of changing a tank of compressed air is much lower. ”

Director Wang was surprised: "The processing accuracy of the 501 factory can meet the demand?"

Hu Wenhai spread his hands: "What I ask for is not a high-end goods of more than one million revolutions, the air bearing of the simulation machine is only 100,000 revolutions, and the processing accuracy requirements are at least an order of magnitude lower than that of the 993 factory." ”

"Well, that's ......" Director Wang stroked his chin and nodded contemplatively, agreeing with Hu Wenhai's statement.

Seeing that Hu Wenhai was able to talk to Director Wang about this kind of professional issue, Si Guxin couldn't help but refresh his evaluation of him in his heart again.

It is said that the son is more valuable than the father, but on Si Guxin's side, he values Hu Wenhai, a child who has not grown up. For Hu Jiefang's 501 factory to be able to reap more benefits, it is also happy to see that the house and Wu are happy.

"I said Lao Wang, can you do the design of this engine improvement? The micro jet engine project is still a new thing in China, if you can't do it, I can find my comrades-in-arms to see Tianfu or Hongdu, maybe they will also be interested......

This is the advantage of an old revolutionary like Si Guxin, and the entire Chinese Air Force can almost be said to have been built on the basis of the Northeast Air Brigade. Decades have passed, but the influence of the Northeast within the system remains strong. Not to mention anything else, just this kind of network of comrades-in-arms all over the world, how can there be such a good thing after the founding of the People's Republic of China?

"Hey, I didn't say no!" Director Wang was anxious, raised his eyes and shouted: "Aren't I discussing with Xiaohu, what are you anxious about!"

Although Director Wang is already the director, he can still brush up a few very good papers with a technology such as a small vortex jet. Not to mention the face of old friends, as well as the 501 factory to coordinate resources in the system, even without these things, Director Wang is also willing to spend his spare time to do this kind of project.

"Okay, then let's optimize the system of this engine with 100,000 rpm and the use of air bearings. By trying to increase the number of stages of the compressor and the angle of the blades, I estimate that I will be able to increase the thrust-to-weight ratio to 12 to 13 to 1. ”

"12 to 13 to 1?" Hu Wenhai's eyes lit up, and he said: "In this way, you can make a lot of attempts in the density of the body." ”

Increased engine thrust means more equipment can be loaded on the aircraft. This is really good news for Hu Wenhai, who is unwilling to make only one immersive machine.

Next, Director Wang, Hu Wenhai, and Si Guxin had a detailed discussion on all aspects of cooperation, but fortunately, the dull style of work in the bureaucracy has not yet spread to such strategic-level scientific research institutes at this time -- in fact, the 601 Institute is already poor and wants scientists to practice and sell early, so how can there be any bureaucratization and proceduralization with the resources of the Zenith.

Director Wang, who can do the project on his own, not only will not be blocked by the organization, but will be vigorously advocated and greatly appreciated. This is also the so-called poverty will change, change will be successful, and civil servants who have changed to iron rice bowls naturally do not have this kind of motivation to find things to do on their own.

The three of them negotiated the matter of cooperation, Hu Wenhai hesitated, scratched his head and suddenly asked Director Wang: "Grandpa Wang, I have something I want to ask you about." However, this matter may be confidential, so if it's inconvenient for you, you don't need to talk about it. ”

Director Wang was slightly stunned, thinking that Hu Wenhai was still a child after all, and probably wanted to ask about the progress of the research on the new fighter plane in China -- this is somewhat to say or not, and it is still no problem to talk about the general direction in a secretive way. What's more, Hu Wenhai's own political background is there, and it is impossible for him to be a spy or a leak. Thinking of this, he nodded slightly and smiled, "Okay, what do you want to ask?"

"Grandpa Wang, is there a group of Pakistanis in the 601 Institute?"

"How do you know!" Director Wang's eyes widened, and he looked at Hu Wenhai with some surprise.

"What's so strange about this, isn't there a rumor that Pakistan is going to introduce the J-7?" Hu Wenhai flashed his eyes and said in confusion: "Last year, there was an article analysis in the aviation world, saying that the minibus may introduce the J-7 to upgrade the J-6 with its current equipment. In this case, it is not surprising that there are Pakistani pilots training in the country, right?"

"Is there such an article in the aviation world?" Director Wang wondered.

Hu Wenhai nodded violently: "In the tenth issue, there is an article about the × fighters of a certain regiment, which clearly says that it is Jian-7. There is a sentence in the article, that is, the Pakistani side intends to introduce this kind of aircraft to be the third-generation aircraft of India. The high-altitude and high-speed Jian-8 is obviously not suitable for the needs of the Pakistani side, and only the low-altitude mobility and flexibility of the Jian-7 can meet this demand. If Pakistan really wants to import the J-7, it will definitely send pilots for training and test flights. ”

Speaking of which, there was really this article in the aviation world last year, but of course Hu Wenhai can't really deduce this fact through this article. It is no secret that Pakistan introduced China's J7-MP in 1985 to replace its own J6, 20 or 30 years later. In 1983, two Pakistani pilots were trained in test flights in China, and the two sides agreed on a specific modification plan for the J7 in order to meet the operational needs of the Pakistani side, and by 1985, the Pakistani side signed an order for the first batch of 20 J7-MP, which is not a strange common sense for enthusiasts who know a little about the Air Force.

And on the side of Hu Wenhai, who already knew the answer, of course, he easily found an excuse to prevaricate the past. In the case of the CIA, it may not be possible to deduce a piece of information with such certainty from the words of ordinary magazines. But if you change to someone like Hu Wenhai, who already knows the answer and then goes to find the process, of course, it is countless times easier.

However, after all, the aviation world is only a popular magazine for aviation enthusiasts, and professionals like Director Wang will not take it to heart even if they read it. He recalled that he had no impression of the article in the tenth issue, so he gave up thinking. To put it bluntly, Hu Wenhai is just a guess about this, and it is he Director Wang himself who did not hold back and indirectly admitted this fact. If you really want to talk about it, Hu Wenhai has neither the possibility of espionage nor the motive for leaking secrets, so this matter is really not a big deal.

"Why are you asking this?" Even so, Director Wang still looked at Hu Wenhai with some vigilance.

"I just thought, if our simulation machine is developed, but only for our own use, wouldn't it be too wasteful?" Hu Wenhai pursed his lips and smiled innocently: "So I wondered, will the Pakistani side also have any interest in this?"

“......”

Director Wang turned his head and thought about it, there was really such a possibility. After the end of the Third Indo-Pakistani War in the 70s, Pakistan could be said to be mourning for the whole country -- just kidding, it was beaten and almost annihilated, and the whole of Bangladesh was carved out to become an independent country, and then it had to pinch its nose to recognize its international status! Under this kind of stimulus, Pakistan is now crazy with the idea that all the people are soldiers.

But the Air Force is an expensive branch of the army after all, and training pilots is not an overnight thing. Therefore, it is not so simple for the Air Force to play all the soldiers. From this point of view, it is really possible that Pakistan will have a demand for realistic machines.

In fact, I'm afraid it's not just Pakistan, so thinking about it, the simulated aircraft should have a lot of temptation for the vast majority of air forces that don't have much money in their pockets.

Just as Hu Wenhai predicted, before the CG performance of the computer does not meet the simulation requirements, the demand for realistic machines can be maintained for at least ten years. After all, no matter how bad the simulation effect of the simulation machine is, at least it is better than nothing. What's more, the cost of the simulated aircraft, the use of it, and the price of maintenance are there, and it is not a dime a dozen for the "deep-pocketed" air force.

On the whole, the training efficiency and cost ratio of the simulation machine is still very exciting.

Isn't that where the market is?

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