WhalePower, has redesigned the typically smooth blades on a turbine, adding a series of ridges, based on tubercles, the bumps on humpback whale fins. The company says this new blade design could increase annual electrical production for existing wind farms by 20 percent. Read more: 10 Wind Turbines That Push the Limits of Design - Popular Mechanics
flow around an airfoil at high aoa, indicated by pressure contours and streamlines
One flying wing from one sheet of foam board, no waste and another from two sheets, also no waste. Ready to fly!
Customized purple and yellow blades for Altra-Air Fans.