What data are you talking about? I know what physics is. There is always a way to make it better. It needs improvement. Its not my job to give the data. I just compare real world and sim. Look at x plane wing flex. Somebody out there can make it. So there is data . Just try to think wider.
In my opinion , wing flex is not realistic on 747 and 777 planes. 737 is somewhat ok.But i believe you can make them better. Is it really hard to create a very realistic flex look?
thanks
burak