Courtesy of Lloyd Wright This Texas-based wind research lab is designed to explore how an array of wind turbines affect one another and discover best design practices for turbine placement and blade design and angle. Related Links: SWiFT Construction Time Lapse Texas Tech National Wind Institute T he United State's first public-operated, multiple-turbine wind-research test facility recently completed its first phase of construction. It is designed to test the physics of how wind turbines interact in a wind array.The $4.5-million facility, dubbed SWiFT for "scaled wind-farm technology," is the result of a partnership between the U.S. Dept. of Energy, Sandia
Arch dams, classically curved monoliths situated in narrow valleys, are not as common as other types of dams, such as embankment dams and gravity dams. ENR takes a look at some of the biggest arch dams in the world, both completed and under construction.