After the Cold War, as long as it is a large military weapon, stealth design is almost an important indicator that must be taken into account, starting with military fighters, and then drones, cruise missiles, and even large special aircraft such as air tankers. Pen & Fun & Pavilion www.biquge.info

So now when the 602 is designed to be straight 18, the introduction of the folded line design on the side of the fuselage is definitely the most fashionable good thing, and it is definitely the wind when you go out.

It's a pity that at this time, the 602 side, it seems that even they didn't think of this simple polyline design, and there is actually a partial stealth effect, maybe in their opinion, this design didn't consider the radar stealth effect at all.

It was also when Yang Hui asked why they designed it this way, and the answer was: "It's very simple, the fuselage of the Z-8 was too wide before, and our improvement this time only reduced the height of the aircraft, but the width has not been moved." In order to ensure that the width of the aircraft can meet the requirements of the carrier, we can only fold the side of the aircraft, and the main landing gear can be smaller to ensure that the footprint is as small as possible. ”

In the face of this kind of answer, what else can Yang Hui say, this Nima is completely embarrassing, people's original idea was just a design to reduce the distance of the main landing gear wheel, but now it makes Yang Hui, who is full of stealth, think too much.

But! It's better to be able to do this, anyway, it's a good idea to kill multiple birds with one stone, you must know that as long as you can stick to the stealth in these years, it is a good thing in people's eyes, it is definitely tall, and you don't blush when you fool people.

"This design can indeed effectively shorten the wheel distance between the main landing gear, which fully takes into account the requirements of the navy shipboard, and can also maximize the use of engine room space." But you designed it like this, didn't you think that it also had a certain stealth ability? ”

It was only when Yang Hui deliberately mentioned the stealth ability of this helicopter that someone suddenly realized that he "vaguely" thought of the helicopter stealth design. It seems that the United States and Europe have done something in this regard, and now they want to ......

The more I look at it, the more interesting it becomes, the more I think it's very feasible, and if you introduce stealth design into the design of the straight 18, it seems to be really feasible!

"Stealth? We've heard of this, but if the helicopter considers the stealth design, although there is also the LHX light stealth gunship project in the United States, our general-purpose helicopter is very different from the LHX, so we didn't consider too much stealth design at the beginning. ”

The LHX project of Daming Dingding, which is the largest military equipment scientific research project in the history of the US military after 2000, the AH66 Comanche helicopter launched by the US imperialists.

Now to say that the general helicopter has requirements for stealth, when the Z-18 helicopter project was established, whether it was the three armed forces or the 602 Institute, AVIC Southwest, no one mentioned this aspect of the requirements, and now the designers of the Z-18 said that this was not taken into account at the beginning, and it was still said in the past.

And now inadvertently,In the design to achieve the stealth design of straight 18,This must be a good development of this advantage,Strive to be able to amplify this inadvertent advantage is the best。

In this regard, Yang Hui already has an idea: "AH66 as an armed helicopter, it is indeed necessary to work the stealth, but our general-purpose helicopter does not need stealth performance, specifically you can refer to the latest general-purpose helicopter NH90 developed in Europe and the United States, which requires low detectability to be considered in the design of the helicopter, which is what we usually call stealth design." ”

In the end, NH90 is also the most recent and largest project in the field of general helicopters in the world, as a contemporaneous project with the A400M transport aircraft, and has also experienced various European member states after the dispute, this project is quite efficient.

At least the NH90 of the previous plane was the first flight work carried out in 95, and now this plane will not be too far behind in the time node, that is to say, the NH90 of this plane and the first flight of the Z-18 are likely to be carried out at the same time.

In fact, the shape of these two aircraft is quite similar, if you really don't know, maybe you will think that the straight 18 is a 1.1 or 1.2 times magnified design product of NH90.

As a practitioner in the helicopter design and manufacturing industry, there is no reason not to know the NH90 that is now vigorously carried out in Europe, and now the head office has pointed out that the straight 18 polyline design and NH90 have the same magic, and the comparison between the two is not like this!

I really patted my head and came to a classic expression: "That's right, I just said that this design feels a little familiar, it turned out to be a collision with the European NH90 in aerodynamic design, but since the NH90 can ensure low detectability, we can do the same." ”

Immediately followed by a quick response, loudly thanking the head office, leaders, and ccav: "Today, Mr. Yang's words can be regarded as a reminder to me, we will immediately start to carry out stealth repair on the shape of the straight 18, but when conducting relevant tests, I also hope that the head office will help us coordinate the relevant microwave anechoic chamber for testing, I heard that recently China has recently attached more importance to stealth design, and the test test of key models has to queue up for a long time." ”

Hearing this, how does Yang Hui feel that the 18 designers are very concerned about the domestic stealth test, as if they already know this, this Nima is obviously ......

Playing geese all day long, this time I was pecked by the geese, it turned out that I also had a day when I was routined by the subordinate designers, and it was really "the upper beam is not right and the lower beam is crooked"!

"It's okay, it just so happens that when you designed the Z-18, you already had a good stealth shape, and you only need to carry out a small amount of aerodynamic modification, and when you need to coordinate the relevant test work, the Z-18 project enjoys the same priority as the company's light four stealth fighter project."

Yang Hui can almost think that this time the straight 18 should have only considered reducing the main wheel base at the beginning, so the fuselage polyline design was adopted.

It's just that someone must have discovered the stealth effect of this design later, but because the Z-18 did not mention the stealth design requirements at the beginning, it has not been paid attention to in the stealth test of the aircraft.

After the support of the head office, the follow-up related test work will be much easier, and after accumulating enough experience in helicopter stealth design through the Z-18 project, in a few years later in the bidding for the armed helicopter project, this is definitely the killer feature of the 602 Institute.

I didn't expect that this 602 was really scheming, Yang Hui said he was very satisfied: "Okay, I have done everything you have requested, now I will go inside the cabin to take a look, this should be no problem, right?" ”

As a general-purpose helicopter that is slightly heavier than the Black Hawk and NH90 by about 2 tons, and the size is slightly larger, Yang Hui is still looking forward to the design of the interior of the cabin. (To be continued.) )