The Shark Skin Paradox: Why Rough Surfaces Make Planes Faster    If you want to build a fast car, you make it smooth. You polish the metal, hide the door handles, and wax the paint. Intuition tells us: Smoothness = Speed. Friction is the enemy, and roughness creates friction. So, why is the Shortfin Mako … Continue reading The “Shark Skin” Paradox: Why Smoothness is Slow