what are the composites used in stealth aircrafts?

Question

main components and reasons to use them

Answer 1

It is called, "Radar Absorbent Material" or RAM for short. What it is made of is classified but think of a strong sponge rubber and you get the idea. The radar waves can enter the material but it does not escape back out in the same direction thus destroying the effectiveness of the radar.

Answer 2

Some of the preious answers are correct. Some are just dumb.
Carbon Fiber. Graphite. Boron. Aramid AKA Kevlar.

The materials and there uses are know all over the WORLD.
Stealth by it's nature does not make an aircraft invisable to radar. It simply lowers it's Radar Cross Section, RCS to a point where most radars will not detect it untill it is too late, if at all.

If you crank up the wattage and power of a Modern Military Radar HGH ENOUGH you can track Birds, cars, people, basiclly ANYTHING that moves.
One easy way to think of it is you are looking for a playing card in a dark room. All you have is a flashlight with a 1in Diameter beam. If the card is face toward you it is much easier to find the if you can only see the thin edge.

By using materials that allow the radar to pass through them, it does NOT return a signal to the reciver. Areas such as the engine that cannot be made of these materials are designed to bounce the signals in odd ways, so the signal never gets to the reciver. Or surronded by materials that absorb the signal.

If you were to look underneith the skin of the B2 for example it looks much like the F117's exterior. The materials and SHAPE of the A/C are what makes it steathy to radar.

Not using Radios take care of Electionic detection.
By using Subsonic engines, no afterburner, and speically designed exhausts the noise volume is cut.
Passing and mixing outside air into the Exhaust cools and lowers the Thermal Signiture.
Black paint and flying at night with no lights, as well as the lack of an afterburner, well kinda makes it hard to spot by eye.

It is by a combination of all these things that Stealth Aircraft are made possible.

Answer 3

You first have to know how Radar works, that way you would easily know why stealth aircraft is not detected by radar. Radar sends sound to one or several points and the way it detects that the object is there, is that the sounds bounces off that object and comes back to the point where it is sent from. Distance is also judged by Radar. When the object is close, it takes a shorter while for the sound to come back, the farther away the object, the longer it would take. How the Stealth is not detected by radar is simple science, sound rays goto it but never come back, and thus does not get detected. There are some radar jammers you can fit in your car which works te same way, some brands of Radars cops use will not be able to detect speed of your car.

Answer 4

No stealth aircraft is composed of secret materials (composite or metal). The stealth is achieved via a combination of one or more of the following:
1) Applying radar absorbing material over the basic fuselage.
2) Shaping the fuselage and wings such that there is a very small radar "Signature"
3) Sheilding all the Hot spots such as engine exhausts
4) Electronic counter measures
And Composites in general, are used in civilian airplanes as well.

Answer 5

Difficult to say accurately, although it's probably important to note that there's nothing that any other fghter aircraft doesn't have. It's more down to the design of the wing and the paint that is applied that makes the plane special. The paint absorbs and baffles radar waves, whilst the lack of vertical surfaces mean that the doppler systems have nothing to bounce signals off.

But to answer, to the best of my knowledge it's an aluminium skin over an aluminium frame like most aircraft, but coated in the composite paint. I would imagine there's a great deal of MMC (metal matrix composite) in the airframe too as it's stiffer and lighter than any metal, but still retains mettalic expansion and ductility properties, unlike fibre composites like carbon fire.

Answer 6

Graphite fiber composites are used mainly for their strength and radio wave absorption properties.

Answer 7

Navigation of Home fighter jet & rudar jamming

Answer 8

That woudl be considered Top Secret and I woudl not be able to divulge that information.

Answer 9

its made of a material that's classified and either reflects or absorbs radar beams

Answer 10

Dont ask, because whoever tells you would have to shoot you afterwards.