Uneven surfaces conserve fuel

Tiny regular bumps on a surface, such as the wing of an airplane, can substantially reduce total air resistance, and thereby the consumption of fuel. Wind tunnel tests at the Royal Institute of Technology in Stockholm, Sweden, show that small cylindrical bumps on a surface delay the transition from laminar flow (well-ordered) to turbulent (chaotic) when air flows over a surface­-a crucial factor in total air resistance.

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<p><a href="http://www.physorg.com/news11095.html">Uneven surfaces conserve fuel</a></p> <p>Tiny regular bumps on a surface, such as the wing of an airplane, can substantially reduce total air resistance, and thereby the consumption of fuel. Wind tunnel tests at the Royal Institute of Technology in Stockholm, Sweden, show that small cylindrical bumps on a surface delay the transition from laminar flow (well-ordered) to turbulent (chaotic) when air flows over a surface­-a crucial factor in total air resistance.</p>