In principle, so that the plane was a stealth (invisible) dalah how to reduce the Radar Cross Section (RCS), which appear on radar. Steps to be done is to make the design of the plane such that the surfaces of aircraft as small as possible reflect the emitted radar energy to be recaptured by the radar antenna. Even if necessary form the plane did not reflect radar energy. If reflected, labored to bounce radar energy is directed in another direction so that if one is caught again, at least only a small portion. For that, the plane made a strange shape not as usual. As an example, the form of B-2 aircraft which has a range that is as long range DC-10 aircraft but made for flat and curved shape in the middle of the body. With this form, in addition to the radar beam velocity is slowed down also gives the reflection effect in all directions.
Wing shape also affect the reflection of radar energy emitted. Form of the old wing straight into the side for example, provide a perfect reflection so that the aircraft is easily detected. on the screen, point the planes RCS looks great.
Given this, then people make sayung wings backward, indeed minimize the reflection but not satisfactory due to the greater RCS, then be made to Delta that makes most of the radar beam on the wing, largely exiled to the other direction. Then made the wings with crescent shape like those of the next-generation planes. By creating an arch in the wing, leading edge, then bounce the other way more perfect.
Another design is to form a plane-sided facet facets kubustik such as eye shape, as in the eyes of dragonflies. Forms are also found on the helicopter on the generation of 1980-1990's as the AH-1 Cobra and AH-64 Apache so that the reflection of radar is not returned to the radar antenna.
Then the general design of stealth aircraft does not permit the pylon or missile or rocket hanger suspended from the body and wings of aircraft such as encountered in the general plane. So that the missile was placed on the shelf-bomb (bomb bay) special.
Another way that is by using a special material known as RAM (Radar Anti-material) that be an energy absorbing material radar beam. The materials include epoxy composites graphyte form of carbon. Because of that, then do not terpantulkan radar energy.
Nevertheless, the bill still is not perfect to fool radar. For example, the F-117 stealth aircraft had been shot down by anti-aircraft missile SAM (Surface to Air Missiles) SA-2 Guideline of Serbia when the NATO air operation in 1999 during the Kosovo conflict.
Tidak ada komentar:
Posting Komentar