Quote:
Originally Posted by mwilliamshs
are the straighteners the horizontal surfaces (and the transition to such) at the rear of the skirts?
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Yes.They intrude into the airstream and create a physical boundary which directs the flow and helps isolate it from hostile pressure gradient across the 'border' which might otherwise induce a span-wise flow,spinning up into power-robbing vortices.
Once the flow is aligned with the fence,it builds momentum which tends to keep it moving in that direction.