Quote:
Originally Posted by kach22i
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.
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Because pressure drag makes up 80-90 per cent of total drag on current road cars.
And the 'tentacles' of vortices can only hold the vehicle back through pressures acting on the surface.
