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Old 22nd May 2009, 03:26 AM   #19
leysenkr
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Join Date: Aug 2008
Location: Belgium
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A smooth surface is good and for this example the reference. Some specific roughness might be better at a certain speed. But on another speed, this exact roughness will slow down more than a smooth surface so it will be difficult to gain more speed. You need the exact speed to obtain the optimal gliding for a certain roughness.

Polished might be better in that specific test. But the sailor will influence the endspeed much more than a polished or non polished something.
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