What are the technical characteristics of China's J-20?

The J-20 (also known as the Veyron) is China's first fourth-generation (there is a dispute over whether the J-20 is a fourth- or fifth-generation fighter) stealth fighter, designed by the Chengdu Aircraft Design InstituteDesigned by the Chengdu Institute of Aircraft Design and produced by the Chengdu Aircraft Industry Group.

The first J-20 stealth fighter technology demonstrator flew for the first time in 2011. Since then, its every move has touched the hearts of countless friends who are military fans, and it was born with a halo. Its appearance will undoubtedly push China's air military power forward another big step, is historic. For its technical characteristics, at present can only from the appearance and some of the use of parts for rough interpretation.

The J-20's technological features are a bold and unorthodox way to talk about the J-20, and I hope you will bear with me if there is anything wrong with it.

A, aerodynamic layout

J-20 shape is a duck-type layout, the basic aerodynamic shape is a long-distance duck wing, a small chord ratio of large swept-back angle of the wing, a large length of the fuselage than the characteristics of such a design is in order to make the J-20 to obtain supersonic speed. The J-20 has a supersonic capability.

The inlet is one of the important parts of the aerodynamic layout, and the J-20 adopts the DSI inlet, which belongs to the multi-wave supersonic inlet, and the J-20's DSI inlet will be folded many times to the incoming flow, which makes its basic performance high, and the optimized design successfully avoids the S-type turn of the inlet. The optimized design successfully avoids the increase of local loss of airflow and the decrease of total pressure recovery coefficient caused by the S-turn of the intake tract.

Two, stealth technology

Mention of stealth technology, we have to mention the U.S. F-22 "Raptor" fighter. It can be said that the F-22 with its high level of technology, is still the world's strongest four-generation fighter.

F-22 cockpit cover using gold coating technology, multi-section nose, all the hatches are serrated edge design, drogue wing surface activities are used in the flexible skin, stealth performance is quite excellent; F-22 F119 engine, thrust-to-weight ratio of up to 10, with binary vector nozzle, maneuverability, good stealth performance. J-20 and F-22 both adopt different wing leading edge parallel design, polygonal section nose and smooth transition fuselage; they also adopt outward tilting double tail, DSI air intakes and other stealth design methods. Overall the stealth performance of the J-20 is still very good, compared with the most advanced fourth-generation aircraft is also comparable.

Three, stealth paint

stealth aircraft in order to avoid radar wave detection (stealth effect) mainly depends on two ways, one is the shape, that is, the shape of the aircraft. The use of carefully designed shape will radar electromagnetic waves reflected in other directions, reducing or eliminating the enemy to receive the return of radar waves, so as to achieve relative stealth.

In addition to the two main ones mentioned above, there is also a stealthy coating on the surface of the airplane. The principle of stealth paint is to convert the radar waves irradiated to the carrier into thermal energy, reducing the reflection of radar waves, so that enemy radar can not receive the radar waves reflected from the aircraft. As stealth paint is easier and more convenient to use compared to the stealth profile, it has been fully promoted.

After the J-20 is equipped with troops, the outside world is also very interested in knowing how effective its stealth coating is. It is known from many current reports that J-20 fighters are deployed at a test and training base in the western theater.

China's western part is a hot and dry area, long sunshine hours, due to the stealth coating needs to be exposed for a long time, which is very big for the damage of the stealth coating, from the J20 so long time to see the performance of the J20 can be shown that the J20 stealth coatings have been a good solution, and even in the coatings technology has surpassed the U.S. F22 and F35.

I personally think that the J-20 fighter is very effective, but the J-20 fighter is also very effective. strong>I personally think that J-20 from the appearance alone, its technical means should be considered quite high, compared with the United States F-22 is also a certain strength. But from the overall technical level there is still a gap, after all, the United States in the research of the fourth generation of aircraft than our leading many years, whether it is the United States or our country, the military many core technologies are confidential, we want to thoroughly understand the technical characteristics of the J20 can only be observed from a number of places to speculate.