I am about 6 posts behind -and now I see what Red was trying to describe:
Ground tracking and gust interferrence
BTW I have a 42% EXTRA model which I fly along with a bunch of other sizes down to 4 ounce foamies - And I really can't see where input from any scientific body will change how these react -or are percieved to react
most of it is obvious.
Has been for years
no studies needed except one's own desire to do things in an orderly manner and pay attention