Thread by @onceggyyy

What is stealth technology?The first step of stealth technology is that it must conform to the principle of parallel design,In order to reflect electromagnetic waves in another direction,This is only the first step in stealth technology. #Aircraft #Fighter #F22 #F35 #J20

The second step of stealth design is to design the edge and transverse gap of the wing in zigzag shape, and use radar wave absorbing materials.This is to deal with the diffraction phenomenon of radar waves.Only su57 has no such design.

The third step is to use the S-shaped curved inlet to shield the engine, because the exposed engine seriously damages the stealth capability.Only su57 has no such design, and its engine is obviously exposed.

The fourth part is that all exposed electronic devices must conform to the principle of parallel design,The eots and eodas of f22, f35 and j20 are stealth shapes conforming to the principle of parallel design. Only su57 still has no such design.

The fifth step is to use the integrated cockpit with parallel design.The integrated cockpit can reduce one transverse gap, and other gaps are designed in parallel.Only su57 still has no such design.

As su57 is still the cockpit of the fourth generation fighter, it seriously destroys its stealth capability. In the model test done by Australian think tank ten years ago, the stealth capability of su57 cockpit was seriously damaged.ausairpower.net/APA-2011-03.ht…

This is the integrated cockpit cover of F22. This is an obvious prismatic shape adopting the principle of parallel design 。 However, the cockpit cover of the fourth generation fighter used by su57 is still arc-shaped.

The sixth step is that all air inlets on the fuselage should be hidden as far as possible, so as to reduce rcs.The air inlet on the back of su57 is directly exposed.

Then all gaps of the fuselage should adopt the principle of parallel design as far as possible,J20 even the gap of weapon storehouse conforms to the principle of parallel design,J20 has only used radar wave absorbing material to fill the gap of weapon storehouse. Su57 still no.

Stealth fighters should use rivets with hexagonal openings,This helps to reduce rcs. Su57 still uses cross rivets.

Ten years ago, Australian think tanks conducted modeling tests on the experimental prototypes of J20 and su57. The stealth capability of su57 is obviously outdated. There is still a clear gap between su57 and VLO stealth fighter.

The rcs of su57 introduced by Russian red star station is about 0.5. Sukhoi Company applied for su57 patent in China, which introduced that the RCS of su57rcs 0.1-1. Therefore, su57 is just a novice LO stealth fighter, which is still far away from VLO.

Of course, there are stealth coatings. The stealth coatings of F22 are very heavy, and the coatings of F35 look the most delicate.Su57 can't tell if it uses stealth paint.

F35 should be pregnant.

The nozzle of F22 is beneficial to reduce the infrared temperature, but not conducive to radar wave stealth, it will form a 90 reflection angle.Radar stealth:B2 Trapezoidal nozzle>F35 Circular sawtooth nozzle> F22 Rectangular. on side:F22>F35.