Yeah...And people says Americans are stupid...
The current foundation of 'stealth' is more shaping than on materials. That is
PUBLIC KNOWLEDGE.
http://www.globalsecurity.org/military/systems/aircraft/f-22-stealth.htm
On post F-117 'stealth' fighters, absorbers are used more on leading and trailing edges than on general large areas of body surfaces. Why ? Because of wave diffraction behaviors.
An aircraft is a finite object, meaning it has boundaries. A radar signal on this body cannot stay on it forever. On the body, the radar signal produces several behaviors, such as surface waves, creeping waves, or diffraction. Each behavior warrant different response method.
Curvatures affects surface wave behaviors. Can we install absorbers to reduce leaky waves from surface waves ? Yes, we can. But would it be worth it ? For US: No. Those leaky waves have been found to be below the clutter rejection threshold for %99 of the radar systems out there, including the military ones. So it would be a weight penalty to install absorbers all over the F-22. Whereas diffraction signals that came off edges are strong enough that it
MIGHT trigger an alert, so absorbers would be appropriate at large areas of edges such as wing leading/trailing edges.
Again...This shit is
PUBLIC KNOWLEDGE.
Regarding rain that is supposedly so detrimental to 'stealth'...
No surface is ever completely smooth. But even so, if the operating freq is centimetric (cm), then as long as surface imperfections are within that range, there would more surface wave behavior than of diffraction behavior.
What water on the surface does is increase surface area and does it irregularly, producing uneven wave behaviors that
MIGHT trigger an alert on the seeking radar. This behavior is applicable
TO EVERYTHING. This is not 'Chinese physics' or 'Indian physics' or 'Russian physics'. This is real physics. So if rain affects radar signals behaviors on a 'stealth' fighter, it would be even more so on the 'non-stealth' fighter because the 'non-stealth' fighter does not have the shaping foundation to start.
Do you understand so far ?
You want to talk about crap ? Go look at the Russian hardware. The Soviets/Russians produces great aerodynamicists, they taught US a few things, but when it comes designing low radar observable bodies, currently we are the standards to match, let alone beat. What I posted in this response to you is 1/10th of the technical information I gave to this forum on 'stealth'.