What is stealth technology? How does it work?

You've heard of stealth aircraft, stealth submarines but do you know what the meaning of invisibility here really is?

>>>Stealth technology through lens layer

Invisibility technology has many types. The word "invisibility" can refer to everything from a paint on a bomber to a disguise of sci-fi equipment. In fact, stealth technology has strongly impacted the world for hundreds of years. It is the "trump card" technology in some armed races.

Stealth is basically a hidden ability, as if you can hide somewhere so no one will see you enter a building, or disguise with a special set of clothes to be able to blend into the crowd. grass. It may sound silly, but in the First World War, the U-Boat's stealth ability stems from the fact that it cannot be detected. When there are no measures and equipment to detect advanced submarines, U-Boat submarines are really "invisible" . Similarly, the altitude of reconnaissance aircraft is also a form of stealth, especially with aircraft equipped with modern equipment, non-standard cameras to spy on the ground through cloud cover.

As stealth technology develops in the earliest forms, the first detection technologies also begin to evolve. Radar and sonar systems (submarine detection equipment) are immediately thought of by humans. For aircraft, due to the structure of metal aircraft, it is very easy to detect and track with radar equipment.

The purpose of stealth aircraft is to let the plane not be detected by the radar. There are 2 ways to create this invisibility. One is that the aircraft may have the shape that every radar signal is "bundled" , and the aircraft may be covered with materials "swallowing" the radar signal.

Most aircraft have rounded shapes. This shape makes the aircraft more aerodynamic, but also produces very effective radar reflexes. The round shape of the aircraft means that even if the radar signal is placed on the plane, some signals will still bounce back. Therefore, a stealth plane will have a completely flat surface shape and very sharp edges. When the radar signal hits the stealth plane, the signal will reflect into a corner like this one.

In addition, the surface on stealth aircraft can be designed in such a way that they will "swallow" radar energy. Therefore, a stealth aircraft like the F-117A can cause radar signals as if it were projected on a small bird rather than an airplane. The only exception is when the plane is tilted - that is the moment one of the plane's panels reflects the radar signal - at this time, the aircraft is no longer "invisible" .

Funny videos about stealth technology:

Reference: Geek, How Stuff Works