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Changes in Reynold's number are quantified on a log scale. 10x difference isn't really that great once you're in turbulent flow and well below sonic.
But anyway, Reynold's number at 200 is only a 200/60 or 3.33x increase. Not a big deal.
Re = density * velocity * characteristic length/viscosity
changes *linearly* with velocity, not with the square.
You don't start seeing significant drag rise until you're approaching transonic velocities. 200mph is definitely in the same flow regime as 60mph or even 30mph.
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