A first objective on most any large design project is to get to the lightest weight possible. At NASA Langley Research Center, where I helped develop the code that later became HyperSizer, designs for spacecraft that include composites also have a zero failure-tolerance. Those projects must strike a critical balance between low weight and high…

Adding a series of ridges to the edges of a turbine blade could increase annual electrical production for wind farms by 20%, says the design firm for the feature. The idea comes from Humpback whales that tilt their fins at steep angles for more lift in the water. Too much tilt, has the opposite effect—a…

The V90-3.0 MW turbine from Vestas Americas improves on previous designs thanks to lightweight carbon fiber in  blades and stronger steel for a lighter tower. What’s more, a microprocessor controlled pitch regulator and  redesigned nacelle further improve the turbine’s performance. The company says minimizing weight was a matter of high priority.  As weight goes up,…