Clearly the black ones are for night operations as for a version with RAM if Iran had it they sure as hell wouldn't use it in Syria and risk it being downed and analyzed by the Americans or Israeli's
And stealth now a day's will only protect you from being targeted from beyond visible range and if a country like Iran can detect stealth aircrafts approaching then countries like the U.S. and Russia can most definitely detect them so how smart would it be to overspend on RAM coating on a lightly armed UCAV such as this that is already built out of composites will mostly depend on how much more money you would have to spend on the coating and maintenance of the RAM coating and whether or not it would be much smarter to build a larger and faster version with greater payload rather than overspending on such a platform
This has to be the dumbest thing you have ever said! The plane is painted black for night operations? LOL! What kind of logic is that?
Is that why nearly the majority of known UAV/fighter jets around the world are NOT painted black? The only “black” painted active military attack aircraft is the B-2. (Nighthawk and blackbird are retired).
So flying at 30,000-40,000 ft it doesn’t matter if a plane is colored black, purple, or pink!
Also your understanding of RAM is severely outdated! RAM used on F-22 is old generation and expensive. It usually is reapplied after combat missions. However, F-35 uses newer generation RAM that is more cost efficient and easier to maintain.
Iran has had another 10 years on top of that to develop even more advanced version since the F-35 was developed over a decade ago using then available technology.
Academic Research Papers on RAM have been published in Iran in last 5 years. And the RQ model is great testing bed.
Why would you build a larger aircraft to test on before you even have preliminary results on a smaller version? It is more cost effective to start on an already established airframe.
Lastly flying wing designs have a more reduced RCS the greater they become in size. So if you can significantly reduce RCS on a Simorgh model with RAM, then on a large capable bomber version you should even reap greater rewards.
Its very likely that that black color is in fact the actual color of the body of the aircraft before the white paint layer,this will no doubt contain additional radar absorbing or scattering compounds,has been applied.We can see a very early pic of the rq170 copy before it has been finished[notice the glaringly obvious gap between the wing and body segment]
This is a very poor version of intial model. It literally looks like someone spray painted the play with a spray can.
The difference between this model and the one shown recently is night and day in terms of build quality. Furthermore, you can tell the body of the aircraft looks like it’s material is different rather than this one which is clearly using some Iranian version of composite material.