As expected, Hongdu once again came up with an heirloom: variable swept wing technology, and the twin-engine variable swept wing fighter can have a lot of design schemes, and this time Hong is very confident.

"We have made a lot of plans in the design of the new J-J with dual medium thrust engines, but considering that the attack aircraft needs a strong payload capacity, we finally chose the central lifting body layout."

The so-called aerodynamic layout of the central lifting body means that it is not only the wings of the aircraft that provide lift for the whole aircraft, but also the fuselage can also play a role in providing lift.

This kind of design idea is common in the early design of the space shuttle fuselage, when the space shuttle did not even have wings, but a strangely shaped lifting body layout.

In terms of aircraft in the atmosphere, the earliest military aircraft models with a lifting body layout are no longer available, but one thing is certain: a military fighter with an upper fuselage lifting body layout will never be a weak aircraft.

For example, the famous Soviet Su-27 fighter, which is a typical fuselage lift body design, with a thinner lower part of the fuselage and a raised upper part of the fuselage, such a design aircraft fuselage is an additional source of lift in addition to the wings.

If the fuselage lift body design of the Su-27 is not too obvious, then change to a more obvious model: the American-made F14, this aircraft uses both sides of the air intake design, thus leaving an ultra-thin and spacious fuselage, which is a typical example of the fuselage lift body design on military fighters.

A thinner and at the same time rather wide fuselage, which is typical of the central lifting body, the F14 adopts such a design that not only provides more lift for the aircraft. At the same time, four heavy hardpoints have been added to the F14 that can carry AIM54 long-range air-to-air missiles.

These are the awesome features of the central lift body design of the fuselage, which can not only increase the lift of the aircraft. At the same time, it can also increase the heavy-duty hardpoint of the aircraft.

In the case that the wings of the F14 cannot be equipped with missiles, a large number of AIM54 missiles can still be mounted. That's the benefit thanks to the central liftbody design.

Now, the Hongdu plan also proposes to design a central lift body for the fuselage on the basis of the variable sweep wing scheme, does this mean that the Hongdu scheme is a small F14......

What will Hongdu's plan look like, for the time being, I haven't seen the existence of models, renderings, or even three views, and in this case, everyone is making up for it according to the clues revealed by Chief Master Lu......

Until Chief Master Lu signaled his apprentices to lift the model out, and the renderings and three views were released on the screen through the projector.

It was only then that everyone could finally see what it was. Yang Erhui also laughed in his heart, Hong Du's plan this time didn't know whether to say a hodgepodge or originality.

"While we adopt the wing-body fusion design, we also introduce a variable swept wing design, a double-engine and double-vertical tail design, which is more ...... in the design of the fuselage."

Chief Master Lu is constantly introducing, but Yang Hui's heart can't be calm, Hongdu's side is really not a hit, and it is a blockbuster.

Just hearing about Chief Lu's introduction, naturally there is no intuitive feeling. And after Yang Hui looked at the renderings, he already understood the strength of this Hongdu.

The so-called central lift body layout of the Hongdu scheme is completely a reduced version of the Su-27 fuselage design!

Graceful streamlined body design, with a slightly downward tilted nose. Under the flat fuselage is ridden with two independent air intakes on the left and right, and the two engines are equipped with Su-27 engines and a vertical tail layout.

Such a design is simply a miniature version of the Su-27, the difference is that the Su-27 uses a fixed swept wing. And Hongdu can be regarded as replacing it with a variable sweep wing this time.

Changing the Su-27 to a variable swept wing is also thanks to the fact that Hong Du was able to figure it out. This Nima is simply too subversive of Yang Hui's three views.

But this design scheme doesn't feel any inconsistencies at all, and it seems to be quite pleasing to the eye. At least it looks much better than the MiG-29.

Yang Hui can see that this Hongdu scheme has borrowed from the aerodynamic design of the Su-27, but he also has to admire the excellent design of Hongdu, which is completely the essence of the swept wing.

With the kind of fuselage design of the Su-27, you will definitely not be able to tell whether to use a mid-wing or an upper wing, and this wing-body fusion design is already quite good.

Yang Hui thought at first that the Hongdu plan would be a reduced version of the F14, after all, judging from the F14's hardpoint design, it was definitely a design that could carry a large amount of ammunition.

At that time, whether it is to the air or the ground, it can have a good effect, after all, the F14 bomb cat on the previous plane is also quite awesome things, and it is definitely the existence of both air and ground in the Gulf War.

As for the design of the Hongdu Cottage Tempest, Yang Hui also thinks that the possibility is very small, after all, the design of the Tempest, just the hardpoint under the air inlet and under the variable sweep wing receiver, can not provide a lot of ammunition loading capacity.

In fact, as Yang Hui guessed, this Hongdu adopted the design of the Su-27 in the aerodynamic design of the fuselage, but in the most important variable-swept wing receiver, it adopted a typical American design.

Chief Engineer Lu continued to introduce that for the design scheme of the variable swept wing, the most important thing is the bulky receiver.

"Our receiver design is based on the F14 design idea, the receiver is made of titanium alloy, which reduces weight and increases the mechanical properties of the receiver, and the gap between the receiver can be variably filled through flexible sealing materials."

When I heard that Hong had to use the F14-style titanium alloy variable-swept wing receiver, my first reaction: This thing is absolutely tall!

But the current republic is going to make such complex large-scale titanium alloy structural parts? For the titanium alloy casing of the F14, Yang Hui still heard of it.

Not to mention the use of titanium alloy for the manufacture of the receiver, the flexible sealing material fills the gap of the receiver with the change of the wing, and this design is also a major highlight of the F14.

And these technical problems are all projects that require a lot of research, and Hong dares to go to this project all?

"Dare to ask Chief Master Lu, does Hongdu really have the ability to process the variable swept wing titanium alloy casing? Variable flexible filler material has also been conquered? ”

Yang Hui's two problems point directly to the hardware difficulties of the Hongdu variable sweep wing scheme, as long as these two points are not solved, the Hongdu scheme will never meet the design requirements.

For Yang Hui to ask so excitedly about the technical difficulties of changing the swept wing, Chief Master Lu was also calm.

"We have completed the technical research of variable flexible filler materials, and we are absolutely not inferior to F14 in terms of material performance; The problem of titanium alloy casing has also been continuously tackled to complete the structural design of the casing; As for the problem of titanium alloy processing, we also have a lot of technical accumulation, if we can have close cooperation in China, it will not be a problem. ”

When Mr. Lu said this, he also had his own considerations, as he said, there is indeed no problem in flexible filling materials.

The structural design is also through special channels, to get the multi-deformation swept wing receiver design, MiG-23, F111, and even F14 have been dismantled by Hongdu in eight pieces, and now they are all placed in Hongdu for internal exhibition.

The structural design of the receiver is indeed not a problem for Hongdu, the most important titanium alloy processing technology, Hongdu has also been studied many years ago, such as the J-12 fighter engaged in Hongdu in the seventies, which is a large number of titanium alloy structural design, so Hongdu is still quite good in titanium alloy processing and manufacturing capacity.

And Mr. Lu just said that the close cooperation in China, in fact, refers to the technical ability of the Southwest Science and Industry Titanium Alloy Processing Base, and Mr. Lu naturally knows that at this time, it will definitely not work to say that the technology is supported by the Southwest Science and Industry.

But Chief Engineer Lu also knows that if Hongdu gets the new annihilation project, it will definitely not be a problem to let Southwest Science and Industry participate in this project, and it will definitely be a supporting unit.

If Hongdu's project plan fails this time, there is no need to worry...... (To be continued.) )