No such thing as radar absorbing paint. The trick to F117 and F22 radar "invisibility" is reentrant triangles. Their paint does nothing, otherwise
dont you think they would have the same colour? BTW Adding an additive colorant would change the properties of the paint.
The real -death of radar- would be the active radar absorption sheath, or ARAS for short. It is a Ruso-Chinese technology that involves running a
plasma over the skin of the aircraft thus absorbing all radar thrown at it.
The only downside is that the cloaked plane is visible to IR whenever it 'dumps' excess plasma due to energy buildup in the plasma sheath. You see
even at low freq, radar still carries some energy with each pulse and absorbing millions of pulses during a mission overloads the heat sink and excess
heat is dumped along with the entire plasma net. This makes the aircraft visible to sophisticated radar and IR for about 350-ish seconds (the time
window is bigger at higher speeds). Fortunately this may only look like a glitch on the screen, but the technology still has other bugs.
For example, it is hard to figure out how to keep the plasma continualy around the aircraft during high acceleration (g) maneovres. It can be kept on
if the plane follows a straight line, but a turn actually bleeds off the energy and drops the cloak until it can be re-initialized again.
Another bug is that low atmospheric friction causes the cloack to drop so it can be used only at high altitude.
is that rain messes it up too, and fog is even worse.
So you can only use it on dry, clear skies at high altitude without pulling high-g and it has to be dropped peridically to bleed off heat. Pretty
unreliable but it is still experimental.
I dont think were going to see it on the skies until 2015 when it is to be tested on the Sukhoi 47 berkut in Russia.
For sources please refer to Doctor Anatoliy Koroteyev, the director of the Keldysh Research Center (FKA Scientific Research Institute for Thermal
Processes) or download a still unclassified paper at this link:
His project is called:"Analysis of the Power Budget and Stability of High-Pressure Nonequilibrium Air Plasmas".
This was introduced at the 31st Plasmadynamics and Lasers Conference, June 19-22 ,2000 Paper 00-2418.