I've noticed that the newly built helicopters such as the Z-10 and Z-20 are mostly painted black instead of army green or camo. What is the reason?
Are you sure? IMO they not black but painted in a very dark oliv green
How many fighters does a air brigade have?
That seems to vary … usually for long when just transformed from their former regiments, a number of 24-28 was normal. Now it seems, several brigades have been expanded in since to more than 30, but I don‘t know for sure.