Aerohead writes "All air in ground proximity is considered turbulent and cannot support the environment necessary for laminar boundary layer,unless the velocity is held below 20-mph."
I have always been skeptical of claims of laminar flow on vehicles, and this is another common consideration, but it seems that when the wind is legal for a speed record, the air might be still enough for some laminar flow.
Anybody trying for it will want to look at longboards for sanding - flexible, two-handed sanding blocks approaching a meter long.
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