Among the five generations of aircraft exposed around the world, the Su-57 has always been considered by the outside world to have no excellent invisibility at all, and it is even called the "Su-27 that beats the flat." This view obviously has serious prejudice. Since the Su-57 can be recognized as a fifth-generation machine by Russia, it has naturally achieved a breakthrough in stealth performance. Recently, a patent document applied by Aeroflot Group Joint Holdings Co., Ltd. to the China Intellectual Property Office was published online, accidentally exposing the radar reflection area of the Su-57, thus solving the biggest mystery.
Public documents show that Russian military industry applied for the Su-57 invention patent at the Chinese Intellectual Property Office on November 9, 2012. This patent includes the fuselage of the Su-57 fighter jet, The main components such as the main wing, vertical tail, fully-moving horizontal tail, cockpit and engine air intake prove that the aircraft has fully considered the stealth requirements in the design of various details, and it is completely a qualified fifth-generation aircraft. Patent documents show that the radar reflection area (RCS value) of the Su-57 is approximately between 1 square meter and 0.1 square meter.
The international standard for stealth fighters is that the RCS value is less than 1 square meter, so it can be proved that the Su-57 is a fifth-generation fighter. However, the stealth level of the fifth-generation aircraft is also divided into grades. The stealth level of the Su-57 is obviously the worst among the four fifth-generation aircraft, and its forward radar reflection area is even at the same level as the J-10C. Domestic aviation experts have said that the radar reflection area of the F-20 and F-22 is at the level of 0.01-0.001 square meters, while the F-35 radar reflection area is at the level of 0.1-0.01 square meters, the difference is 10 times. The data disclosed by the Su-57 this time proves that its stealth performance may be even worse than the F-35, and the gap with the J-20 is 100 times. The role of stealth performance in air combat is quite limited.
A Japanese magazine once used the APG-77 active phased array radar detection range equipped with F-22 as the standard and listed the discovery range of the world's top fighters. A fighter with a radar reflection area of 0.001 square meters has a detection distance of about 40 kilometers, while a target detection distance of 0.5 square meters is 185 kilometers, and 1 square meter is 241 kilometers. The radar reflection area of the Su-57 square meter is 0.1-1 square meters, which means that it will be spotted by non-stealth fighters equipped with active phased array radar 200 kilometers away. This distance has exceeded the range of mainstream air-to-air missiles. very obvious. Some analysts believe that although the Su-57 has a built-in bomb bay, the logo of a stealth fighter, it has not used a dragon neck lens since its debut, which proves from another side that the aircraft is not a stealth fighter in the complete sense.
The stealth performance of Su-57 is obviously more than 100 times worse than that of J-20, so why apply for a patent in China? It is necessary to know that Cheng Fei's development of the J-20 naturally looks down on the Su-57's "advanced stealth technology", and Shen Fei's development of the FC-31 "Falcon Eagle" also proved that he will no longer imitate the Su-57. In fact, the Su-57, as the highest player in the Russian aviation industry, is a routine operation to apply for patents in many countries. It is to avoid other countries from using its unique invisible design. This is a relatively advanced act of intellectual property protection and worthy of China. Aviation company learning.
Since modern fighter jets are developed by the state at a cost, Chinese aviation companies often do not care much about protecting intellectual property rights. The J-20 is a fifth-generation aircraft completely independently developed by China. It is also the only fifth-generation aircraft in the world that uses canard wings + side strip wings + full-moving vertical tail. It won the National Patent Office Design Gold Award 6 years after its debut, proving the time to apply for a patent. It's also late.
Su-57's application for international patents in China means that no company can produce models and toys casually, let alone develop fighter jets similar to Su-57. Since Shen Fei’s future development direction is to develop a real stealth fighter (the fourth generation of the sea), the design concept of the Su-57 cannot be seen at all, so Russian aviation companies can rest assured. It is foreseeable that the final effect of this invention patent is to prevent the proliferation of Su-57 toys, which is really embarrassing.
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