243 Full Spectrum Invisibility

Chen Fei and Li Donghai’s mission is actually not complicated, but they just go to a certain airspace to view two planes that are about to enter our airspace.

This kind of mission has always been the only choice for our army to fight with foreign troops before it invaded.

Because it was a peaceful era, foreign fighter jets could not really invade, so they generally used the method of playing edge balls. Pilots flew on the edge of our airspace, sometimes just flew up, but more often they drove reconnaissance aircraft or electronic reconnaissance aircraft to conduct reconnaissance. At that time, the measures we could take were just expelling.

However, in those peaceful times, this was a task that many pilots were eager for. This was one of the few opportunities that could allow everyone to demonstrate their skills. It is no exaggeration to have a third-class merit completed.

However, since the invasion of alien fighter jets, there have been fewer such tasks, and this kind of mission is already of a relatively low level. It is generally carried out by the air force or naval forces responsible for the security of the third line of defense. Generally, front-line troops like Chen Fei and others will not be dispatched.

However, because Chen Fei and Li Donghai were flying to J-20 for the first time, although they performed well in previous modification training, no one knew what they were like in actual combat. Therefore, the superiors intended to give them more opportunities to exercise, so this mission will be distributed to Chen Fei and Li Donghai!

Chen Fei drove the J-20 and flew towards the target airspace at high speed.

He easily rushed the speed of J-20 to Mach 2, so he reached the target airspace in a short while.

Although the J-20 C also belongs to the J-20 series, it has to be said that the quality seems to have risen directly. Even if it reaches Mach 2, the body of the fighter jet is still stable and solid, and there is no feeling of falling apart. The reason why this is so is that the J-20 C adopts a large number of 3D printing manufacturing technology.

The two J-20cs have already flown into the sight range of the two aircraft, but the two aircraft still know nothing.

This is the terrifying thing about stealth fighter jets.

The stealth technology of J-20c has once again made a major breakthrough. Not only is the body more stealthy, but the paint on the body also uses more advanced paints, which is not only corrosion-resistant and sea breeze-resistant, but also has excellent stealth effect.

The most important point is that the infrared stealth effect of J-20c has also reached an unprecedented level.

In the past, stealth fighters, such as the f35c, f22, and the latest generation of J-20, their stealth was only against radar. Therefore, at that time, if you want to crack this kind of stealth fighter, there was no way to use the photoelectric detection and tracking system directly, that is, infrared detection technology!

This is why the J-10 D is not a stealth fighter, but it is not impossible to have any solutions in the F35 duel.

However, starting from J-20c, all this has changed, and infrared stealth technology has developed leapfrogly.

Fifth-generation aircraft attach great importance to photoelectric detection technology, so both hostile parties will try to conceal their infrared characteristics as much as possible.

In order to ensure the high maneuverability of fifth-generation aircraft, all parties have adopted high-power jet engines, but this will lead to the increasingly obvious infrared radiation characteristics of fighters. Therefore, how to make high-speed fighters stealth in infrared spectrum become more and more important.

Electromagnetic waves in different bands have different characteristics, and the mechanism of detection targets is different, so the stealth technology used for each band is also different.

Radar detection targets mainly receive radar waves reflected by targets and secondary radiation. When the size and wavelength of the line on certain surfaces of the target are comparable to that of the wavelength and form an angular reflector, the target strongly reflects the radar waves and shows a large scattering cross-section. The induced current formed by the radar waves irradiate on the target metal parts will produce secondary radiation, which also makes the target have a larger scattering cross-section. Therefore, the angular reflectors should be eliminated as much as possible, shield the strong reflection and radiation sources, and use several small planes instead of the curved discrete radar scattering cross-section. Special paints are used to convert the induced current generated by the radar wave into thermal energy. Component materials that are transparent to the radar waves can be used to reduce the radar scattering cross-section to achieve the purpose of radar stealth.

The infrared detection system works by the presence of temperature differences and different infrared radiation characteristics between the receiving target and the background.

Because the wavelength of passive detection and infrared light is very short, the role of angle reflectors has little effect in infrared stealth technology.

According to the characteristics of thermal radiation and infrared detection, infrared stealth is a comprehensive use of various technical means to eliminate the temperature difference between the target and the background, so that the radiation characteristics of the target should be the same as the background as possible;

When the temperature difference between the target and the background cannot be eliminated, it will be tried to reduce the brightness and contrast of the thermal radiation source, so that the infrared detection system cannot see or see the target clearly;

For strong radiation sources that cannot be eliminated, the direction of thermal radiation is limited to increase the difficulty of infrared detection.

Based on this principle, J-20c adopted a new infrared stealth measure, and carried out a lot of research on its three major thermal radiation sources, namely the tail nozzle, gas jet and surface pneumatic heating, and finally achieved considerable results. First, a rectangular or binary tail nozzle is used to increase the contact surface between the tail nozzle and the external air, which not only uses the external cold air to dissipate heat to the tail nozzle, but also uses the high-temperature gas jet sprayed by this part of the cold air and the high-temperature gas jet sprayed by the tail nozzle to reduce the temperature of the gas jet and reduce the infrared radiation of the tail nozzle and the gas jet. Second,

Use the fuselage or tail wing to block the tail nozzle, making it difficult for infrared detectors to detect from below and on the side. 3. Use a high-power turbofan engine to reduce or cancel the use of overload and reduce the infrared radiation generated greatly due to afterburning combustion. 4. Use composite materials in the aircraft structure to shield the heat radiation inside the fuselage. 5. Spray infrared stealth paint on the surface of the aircraft to change its emissivity and reduce the infrared radiation on the surface. 6. Put additives in the fuel to move the infrared spectrum of high-temperature gas jet radiation to a band that is easily absorbed by the atmosphere.

The biggest breakthrough of J-20c is the fifth and sixth items. First of all, the use of brand new paints, which is said to be the latest research success of scientists from China, Japan and South Korea. It not only greatly reduces the air resistance of fighter jets, but also greatly reduces full-spectrum radiation, including radar and infrared;

Secondly, in terms of additives, our army's scientists have also made major breakthroughs. Their newly invented aviation oil additives can not only greatly improve the combustion effect of aviation gasoline, but also greatly reduce infrared radiation.

Therefore, at this time, the J-20c stealth is no longer just radar stealth, but full-spectrum stealth, and all detection methods are difficult to detect.

this!

It is the legendary real stealth fighter!

When Chen Fei and Li Donghai both flew into the sight range of the two fighter jets, the two fighter jets were still unaware of it and were still flying leisurely, eager to try it several times, as if they wanted to go to our airspace to do a test!
Chapter completed!