This is the first time you have seen a fighter with a smooth and beautiful canard layout, although it is only a model.

If you look at it from the front, there is almost no difference from the F-16, the nose is almost the F-16 to take over, its huge bubble canopy, people can see at a glance, sitting in it will be very comfortable, at the same time, its belly air intake, like a big mouth, the front part of the air intake, the nose is flat, which can play a role in the pre-compression of the airflow.

Under the nose of the aircraft, the nose landing gear is under the air intake, retracted backwards, Song Lao's gaze immediately noticed here, this is also a common problem of belly air intake.

Unless it is a twin-engine fighter, such as the F-15, MiG-29 and the like, the air intakes are on both sides, so that the middle part can be freed up to arrange the nose landing gear, otherwise, the landing gear can only be arranged under the air intake.

What does this mean?

It cannot be connected to the main force girders of the fighter, and no matter how strengthened the air intake is, it is impossible to achieve the same level of force as the fuselage girders, which means that the maximum impact force that the nose landing gear can withstand is limited.

Of course, for ordinary fighters, this design is understandable, the force of the front landing gear is not large, the main force is on the main landing gear behind, when landing, it bears the strongest impact force, if the strength is not enough, it is easy to break the leg when landing.

Only carrier-based aircraft, and carrier-based aircraft that catapult and take off, need to strengthen the nose landing gear, and this kind of change is too illusory to consider for the time being.

Thinking of this, he then looked at the main landing gear behind him.

The previous fighters, J-7 and J-8, all designed the fulcrum of the landing gear in the middle of the wing, in this case, the distance between the main landing gear behind is relatively large, and there is no need to worry about becoming a seesaw when landing, but this design was quickly eliminated, and the current fighters and landing gear are all under the fuselage, so that they have to stretch outward and become the outer figure.

On the one hand, the wing can be placed with a large overall fuel tank to increase fuel storage, on the other hand, a lot of pylons can be arranged under the wing, so that the fighter can mount more missiles, auxiliary fuel tanks and the like, if the landing gear is in the middle, then the front and rear are separated, and it is not easy to arrange.

However, this is a big test for the design and manufacture of the landing gear, the biggest difficulty of the No. 10 project fighter is the flight control system, but the landing gear is definitely not a big difficulty, because there is no relevant research and development experience in China, the materials are good, the processing accuracy is high, it is a great challenge!

Song Lao's gaze went up, and he could see its wings, the canard wings and the wings were overlapping, this is a close-coupled layout, this layout can maximize the utilization of vortex, this should be similar to their lion cub fighter, it is a kind of inheritance of their technology, but the fixed canard wing has become a movable canard.

However, from a professional point of view, Song Lao does not think that such a design is the best, but this is someone's plane, how do people design it, that is the truth of someone's family, he came here to learn, take its essence, and remove its dross.

What are the drawbacks? Song Lao has more than ten years of experience in wind tunnels, and has a deep understanding of this coupling method, the canard wing distance is too close, the head is too fierce and difficult to control, and although the coupling effect is strong, it can improve the maneuverability of the aircraft, but the appearance of vortex will also bring huge resistance, this wing looks very complicated, but the performance is not clear.

Then, I saw the back, and the rear fuselage looked good, and it should have used the area ratio for practice.

Area ratio refers to the relationship between the zero-lift shock drag (referred to as wave resistance) and the cross-sectional area of the aircraft when the aircraft is flying at transonic or supersonic speeds.

Therefore, there are two kinds of area ratios, transonic area ratio and supersonic area ratio, which are applied to reduce the drag of the aircraft.

In specific professional language, when the flight speed of the aircraft is close to 1 times the speed of sound, the zero lift wave resistance is a function of the cross-sectional area distribution of the aircraft, and is approximately equal to the zero lift wave resistance of the spiral with the same cross-sectional area distribution. In this way, the cross-sectional area of the aircraft can be adjusted according to the cross-sectional area distribution of the minimum wave resistance cyclomorphic body to reduce the wave resistance.

After talking for a long time, no one can understand, but to put it simply, that is, to make the fuselage cross-sectional area of the tail and fuselage connection area into an inward concave shape, which is the "bee waist" shaped fuselage.

As for the supersonic area rate, it is even more complicated, as the cross-sectional area that determines the zero-lift wave resistance of a supersonic flying aircraft is the cross-sectional area of the aircraft cut by the tangent plane of the rear Mach cone (also known as the Mach plane) passing through a point on the longitudinal axis of the fuselage at a given number of flying Machs.

Now, the rash pursuit of higher speed has been considered a wrong direction, and the air combat of fighter jets mainly takes place in the transonic range, so this transonic area rate is the most commonly used.

The Lion fighter in front of me is mainly used to make bomb trucks, so it is made into the shape of a bee waist.

Of course, there is no need to exaggerate the reduction in transonic drag, but it will also bring the negative effect of supersonic and subsonic drag.

The design of the whole aircraft is a compromise result, and it is necessary to use this area ratio to modify the model, but not to be extreme.

Now, Song Lao is savoring the model of this prototype, and compared with the drawings or the computer, the visual impact of the real thing is greater. It is easier to form the most intuitive image in the brain, which makes people feel refreshed.

In this era, there are no similar fighters, the typhoon is still being coordinated, the Gripen is still in the planning stage, and the aircraft in front of him is already a fighter with a canard layout that is about to enter the prototype development.

"I remember, American engineers said that the best canards are on enemy planes." Qin Feng suddenly came out of his mouth with this sentence.

He said whatever he wanted, and there was no irony, after all, his own model was also laid out in a duck style.

When many people interpret this sentence, they will say that canard wings will destroy stealth and the like, but this statement was already very popular before J10 came out.

Hearing Qin Feng's words, Ramour on the side immediately said: "That's because they are outdated, they are still immersed in the world of stability, and the air battle in the future will be an instant victory, and when our plane comes out, I really want to compete with them to see whose plane is more powerful!" ”

It's designed as a bomb truck, but it's also capable of fighting in the air!