Quote:
Originally Posted by aerohead
Aerodynamically there is a tradeoff,however from Hoerner,and others,the captured- vortex over these regions behave as a phantom surface,with the flow field passing over as if they were solid structures,and little drag penalty.Hope that helps,Phil.
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Oh, really... Does there appear to be some rule of thumb regarding the size of such openings or other conditions to suggest when this will happen vs. when significant drag appears?