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I'm sure you know a lot more about it than I do. I can only speak from my own experience which is that a bike will be noticably slower when you change from drops to flatbars which results in a larger effective frontal area. http://www.cyclingpowerlab.com/CyclingAerodynamics.aspx
https://en.m.wikipedia.org/wiki/Drag_equationI'll drop out of the discussion (which I started, sorry for that) now since it appears equally obvious and pointless + I don't want to derail vince's thread any longer.
tell me more