Strong, light blades a boost for wind energy?

Bigger is better — when it’s also lighter and stronger, goes the thinking of engineers and materials scientists designing the next generation of blades to wring energy from the wind.

Bigger blades can get more energy from the wind, but this advantage is lost if the blade is also heavier, since more wind is needed to turn the rotor. In addition, the more the blade flexes in the wind, the more potential energy is lost.