Quote:
Originally Posted by JulianEdgar
Tufts demonstrate what is happening on the vehicle surface, and since we're talking about pressure drag, it's only on the vehicle surface that we're actually interested in what is going on......
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Pressure drag?
Why would we limit ourselves to that?
A vortex may be a simple planar pressure difference at the surface, and it's true expression as a force of power forms after.
As I understand it, drag causing vortexes can be delayed by rake fences and fins (vertical stabilizer wings), but they are similar to tentacles that hold the vehicle back like a parachute.
If we look only at tufts or numbers at the surface we miss the bigger picture.