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Old 01-30-2018, 02:08 AM   #50 (permalink)
freebeard
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I don't get the first one.

Those deflectors to keep the back window clean add frontal area, and therefore drag.

Golf balls are dimpled all over to take air from any direction. A single ring at 90+ to 115° from the stagnation point would be enough for a directed flight. Eventually this reduces down to vortex generators.
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