Zhuang Jianye suddenly felt that there seemed to be something wrong with the style of painting, didn't he say that he was an advanced light transport aircraft?

No, the rhythm has to be broken back, otherwise what can be done with the birth permit of the new model?

However, before Zhuang Jianye could speak, Song Changzheng came to Director Zhao's side with a smile and asked if there were any special snacks in the cotton market.

Director Zhao is not a local, how can he know so much, so he naturally pulled Zhuang Jianye over and asked him to introduce him well.

Zhuang Jianye looked at it this way, this is the rhythm of the three who are satisfied with the inspection and are ready to end happily, if they say anything about advanced light transport aircraft on the pole, maybe the three will listen patiently, but the effect is estimated to not be very good, after all, the caliber and attitude of the three are very important.

The Y-7 and the advanced light transport aircraft are almost the same as the Y-7 and the advanced light transport aircraft, the difference of one word can determine the fate of a model, Zhuang Jianye is not like messing things up because he is in a hurry, anyway, the development cycle of the new model is not short, and the opportunity is that it is not bad this time.

So Zhuang Jianye decisively changed from a professional aviation UP owner to an excellent food blogger, wanting to eat the characteristics of the cotton market, no problem, the arrangement is over.

After sending Director Zhao and the three of them away satisfactorily, Zhuang Jianye burped and prepared to leave by car, but before he could get on the car, Qian Qiang, who had been silent during the meal, suddenly gritted his teeth and asked, "Mr. Zhuang, did I mess up something this time?"

Director Zhao, Song Changzheng, and Li Fang suddenly shifted their focus, and then ended the investigation without delay, which not only surprised Zhuang Jianye, but also caught Qian Qiang off guard.

The low fuel consumption rate of the D series turboprops was mentioned earlier, mainly to confirm that advanced light transport aircraft can fly up to 5,000 kilometers.

As a result, Li Fang and Song Changzheng were indeed surprised by the low fuel consumption rate of the D series turboprops, but that was all, and then ...... There is no then.

You must know that Qian Qiang has a lot of introductions to advanced light transport aircraft behind him, and he was stirred up by the three of them, and he didn't say a word.

During the meal, Qian Qiang had the heart to speak, but after being poured down by Song Changzheng's three glasses of liquor, Qian Qiang was a little star in front of him, and it would be good to be sober, and he said that he was an advanced light transport aircraft?

It wasn't until he was full of wine and food that everyone left, Qian Qiang felt that his head was his own, but it was too late, so he regretted it a little, if it was good to talk about advanced light transport aircraft first, why did he talk about the engine first?

Zhuang Jianye drank some wine, his head was not bright, he was stunned for a moment, frowned and thought about it, then he understood the meaning of Qian Qiang's words, and then smiled, "The three chiefs probably think we are bragging." ”

"But we are not bragging, our engines are installed in the traditional models such as Y-7 and An-26, of course, can not reach the subversive range, because these two models of fuel are limited, but the forestry workers have studied the technology of the central wing box, and our D-40 and D-50 have been for three years, and have produced a lot of results, at least doubling the fuel load is not a problem. ”

If Qian Qiang's words were heard by the three who had already left, their jaws would definitely drop, D-40 and D-50 had been launched three years ago, so what about the core machine?

In fact, it is not difficult to understand that after the initial results of D-20 and D-30 were achieved in the original take-off factory, the pre-research of D-40 and D-50 began immediately.

It's just that at that time, the indicators of the two models did not reach such a perverted level because of materials and accumulation, and with the step-by-step upgrade of the Tengfei Factory, it became Tengfei Aviation Manufacturing Corporation, and the original jet power office became Tengfei Aviation Power Factory.

In order to reduce R&D costs and expand application models while mastering the core technology, Tengfei Aviation Power Plant, with the support and promotion of Zhuang Jianye, began to shift from specific models to core aircraft.

However, this is not to say that it is so lightweight, without several years of model research and development, experience accumulation, it is impossible to engage in a core machine.

The reason why the HX-4-1 core machine can be promoted relatively smoothly is based on the two mature models of D-20 and D-30, as well as the two pre-research models of D-40 and D-50.

In a method similar to the mathematical common divisor, the general technology and mature experience of four models are selected, combined with the new aviation development materials continuously developed by Tengfei Aviation Corporation, which makes the HX-4-1 core aircraft have today's appearance after two iterations.

Of course, when we were hurrying to develop the HX-4-1 core machine, the two models of D-40 and D-50 that were pre-researched did not stop, and we continued to absorb the research results of the HX-4-1 core machine and carried out a series of test experiments.

Until now, some indicators are still unstable, and they are constantly being tested and improved, which is a very long process.

Compared with Qian Qiang's engine, Lin Guanghua's central wing box is much smoother, originally this field of Tengfei Aviation Corporation was not involved, but one day suddenly found that in the training center of a pilot research institute of the training personnel of the completion design of a central wing box on the single wing, so that the parameters of the aircraft have a gratifying change, which attracted Lin Guanghua's attention.

Then this product shamelessly dug the trainee to the Tengfei factory at that time, and worked with him on the research of the central wing box.

At the beginning, the idea was very simple, that is, I wanted to use it on the drone, because the central wing box can not only strengthen the strength of the wings on both sides, but also the wing box can also be used as a storage device for the fuel tank, increasing the fuel carrying capacity of the drone, and then increasing the range of the drone.

However, when the UAV began to be replaced, the fuel economy went up, and the range naturally went up, although the central wing box increased the fuel load, but also increased the total amount of structure, which was a bit chicken for the UAV, and the matter was over.

After that, Tengfei Aviation Corporation was ready to march to manned aircraft, preparing to make a breakthrough from the Yun-5, and then it was Yun-6, which gave Lin Guanghua more and more room to play, so in a certain Yun-6 plan, he added a central wing box to it.

But the manufacturing process of Yun 6 is the overall solidification of the fuselage of the honeycomb structure, and the ability of Tengfei Aviation Corporation can not leave a preparatory installation position for the central wing box, followed by the Yun 6 is a small aircraft, and adding two support beams on the fuselage can play the role of strengthening the wing, simple, effective, and the cost is also cost-effective, much more convenient than using the central wing box, so it can only be given up again.

It wasn't until the advanced light transport aircraft program was launched within the Tengfei Aviation Manufacturing Corporation that the ultra-long range made it impossible for ordinary structures to meet the index requirements, and Lin Guanghua once again sent the central wing box that had been studied for many years.

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