When he said this, Andre had a huge emotion in his heart. Pen, fun, and www.biquge.info

This sentence is not said by Andrei, nor is it a false rumor as later generations said, this sentence comes from Harry J. Chiracl, who is the chief designer of the American General Dynamics flight system and the chief designer of the F-111 and F-16. At the same time, his other identity is one of the absolute core four members of the fighter mafia: the four members include John Boyd, Harry Hiracelle, Pierre Sprey and Rickioni. They created and perfected the theory of energy maneuvering, which guided the design of later fighter aircraft.

This sentence is what Hiracel said at the tender meeting for advanced fighter jet technical documents, just a few days ago, many companies used canard wings or even forward-swept wing designs in their designs, and in the face of these designs, as the authority to preside over the meeting, Hiracel said mercilessly that canard wings are of no value, and its best installation position is on enemy aircraft!

This sentence is not unreasonable, the canard wing is the layout method of placing the horizontal stabilizing surface in front of the main wing, and the horizontal stabilizing surface is installed in the back, which is the most common tail wing.

Canard wings have a long history, when the Wright brothers invented airplanes, they used canard wings, however, due to various technical defects, this canard wing did not become popular until the successful development of fly-by-wire operation, and the canard layout began to reappear.

Compared with the tail layout, the canard layout has advantages, and this advantage is better in statically unstable aircraft, such as the ordinary trim flat tail produces negative lift, that is, if the aircraft wants to climb, the butt must first be pressed down. The canard wing, because it is in front of the center of gravity, generates positive lift, pulls up the operating lever, and the nose of the aircraft is directly raised.

At the same time, the most outstanding contribution of the canard wing is that the effect of the detached vortex pulled out of the canard wing and the surface layer of the stabilized main wing can help the aircraft improve the stability and lift coefficient at large angles of attack. In today's aerodynamic theory, the use of eddy currents is crucial.

During takeoff, the forward deflection of the canard wing can greatly improve the lift and reduce the running distance; It can be used as a speed brake when landing, and there is no need to use a back speed brake.

These are all advantages, but at the same time, canard wings have disadvantages, and the most prominent disadvantage is stealth! When the canard is moving, the reflected radar wave generated is increased by orders of magnitude, which is not conducive to the stealth of the fighter, and at the same time, the aerodynamic interference of the canard wing and the main wing increases nonlinearly with the speed, so it is difficult to control and increase the complexity of the telex operation. Because the canard wing is far closer to the center of gravity than the flat tail, it needs a much larger rudder area deflection to achieve the effect of trimming and controlling the aircraft, and there are also the requirements of high angle of attack and the requirements of the head down to control the torque, and the increase of trim resistance and the decrease of maximum trim lift caused by the canard load.

It can be said that the advantages and disadvantages of canard wings are also present.

In later generations, the European typhoon, Rafale, Gripen, and Huaxia's Jian-10 all adopted a canard aerodynamic layout, if from a simpler point of view, this is a typical lack of power, and the way to make up for it with a pneumatic layout, because there is no advanced high-thrust engine, this compromise method has to be adopted.

And the United States, the scientific and technological strength is the strongest, especially the engine, which is simply alien technology. As long as the engine is good, a brick can fly! The fourth-generation aircraft of the United States uses engines with a thrust-to-weight ratio of 10 levels, which can only be achieved by the United States in later generations.

After all, the J-20 is very advanced in all aspects of design, but the engine is still a weakness, and when it comes to test flights, it has always been made up with AL-31F, although it is constantly reported that the progress of the Taihang engine, as well as the updated turbofan-15 engine, it is still a question mark, and there are many difficulties in the engine, and it can only be made up from an aerodynamic point of view, and the canard layout is a last resort.

(I heard that the turbofan-15 has really matured, and I wish our defense industry will continue to grow!) ）

Andrei, who came from later generations, is well aware of the disadvantages of duck wings, and now, on the basis of the Su-27, making duck wings is even more like painting a snake! Because, the Su-27 was originally a conventional aerodynamic layout, and on this basis, adding canards to become the world's only aircraft with a three-wing layout will also be offset by disadvantages!

There is evidence in later generations, in addition to the original sea side guard Su-33 with three wings, only India is a third under the flickering of Russia, the use of three-wing surfaces and "awesome" thrust vector control technology, the rest, almost nothing, even the Su-35, the old is a three-wing layout, the new one has also been replaced with a conventional layout, and the use of canard wings on the Su-27 series aircraft is absolutely chicken.

This is also the reason why Andrei is strenuously opposed.

Now, although Andrei's position is not high enough, but Andrei's right to speak is the most important, at the beginning, Andrei strongly supported the overthrow of the T-10, so that there is the current Su-27, and now, Andrei is strongly opposed to the canard wings.

Chop up all these projects for the development of canards! With these abilities, work on them elsewhere!

Andrey's words made Simonov's old face red, this duck wing was actually proposed by Simonov, but now, it has been ruthlessly criticized by Andrei.

Looking at Simonov's expression, Andrei knew that he was presiding, so Andrei's words slowed down: "Comrade Simonov, our new fighter is to balance all kinds of performance, and only want to highlight too much maneuverability, which will inevitably affect other performance, for example, for new fighters, stealth will be related to the survivability of fighters, and it must be regarded as a key point." ”

Stealth! This is also what Andre attaches the most importance to, after all, in later generations of China, in the face of the threat of the Americans' F22, I don't know how detailed the analysis has been made, but there is only one conclusion, if you want to fight F22, you must have the same stealth aircraft! This is also the reason why the country has made great efforts to develop fourth-generation aircraft!

"At the same time, in order to discover the opponent's stealth aircraft, we need our fighters to have a more powerful radar, we don't need a backward passive phased array radar with huge volume and weight, that's not the electronic equipment of the fourth-generation aircraft, our active phased array radar, how is it going?" Andrei continued to ask.

The layman looks at the excitement, the insider looks at the doorway, Andrei came here, not just with Ustinov and Kordonov, many of Andrei's proposals are even more far-sighted than professional designers. (To be continued.) )