RD: Oxygen levels have been around 20% or about 20.000001% given this chart.
Chart:
http://www.globalchange.umich.edu/globa ... oootwo.gifOver all we'll assume that the air is hell of a lot less polluted during our discussion, since in all technicality, they were. So, over all I doubt the density of the air would be a lot more thicker then what we have today. If it was thicker it wouldn't be by much.
In all technicality though, the Quetzlecoatlus were originally deemed as a god so he was there since the beginning of time. However, in this discussion I would suggest that we use Medieval Times to 800 BC as our base since that be the generic area of where most of the "myths" came.
FDI: I know this. However at the time I believed that weight was the commonly discussed factor in mind at the time. In which I stated that limbs and additional things a true dragon would have would also either add or subtract from the weight factor.
In all honesty though, I do agree with you that there are far more factors in use that would determine what the maximum size a dragon could possibly be to fly.
_________________
Drakel:
Guard the dragon, Hunt the slayers, Master the skills to save the idea.My Website:
http://drageloc.forumotion.com/Where I'm At:
http://www.roleplayerguild.com/users/126My Skype: Drakel001
My Facebook: Drakel Pyrohell