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cfg83
your measurements come close to the 30degrees and 21 degrees originally mentioned
i think the distance between the wings contorlles the ammont of air that still passes trough, and the same of the airfoil how soon the air stalls and how big the separation bubble will be.
i've been wondering of the same generall effect can't he reached with a more blunt shape in place of the "wings"... surely a less aero shape should couse an even bigger flow sepparation.... wich could allow for even more space between the slats.
this could put a new light on some bulky looking grill designs that don't look very aero at first sight
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