The Dornier research aircraft that flew from Cranfield yesterday reported THREE distinct layers of contaminants BELOW 10 Thousand feet!
Did anyone boroscope the Dornier afterwards, to see if the contaminants (at this concentration) did actually stick?
As an aside, a colleague reports that he has been banned from posting on this thread for being negative. The Mod said "pro comments only accepted on this thread". What kind of free-speech discussion is this?