This report has spread throughout and lots of articles are claiming the J-35 has a RCS less than the palm of your hand.
But is the report talking about the J-35 or is it talking about it’s engine?
I.e. is it actually saying the engine has a RCS the size of your palm?
EDIT, sorry I just saw Deino’s request to not talk about this anymore.
Means that it is small enough to fit in your palm for the lay person. How small it is and in what radar bands is up to anyone’s guess.