How #WindPower Works : When you talk about modern wind #turbines, you're looking at two primary designs: horizontal-axis and vertical-axis. Vertical-axis wind turbines (VAWTs) are pretty rare. The only one currently in commercial production is the Darrieus turbine, which looks kind of like an egg beater.
What is Product Design? https://tapwage.com/article/3479/a-working-definition-of-product-design
A concept and a modern interpretation of a rocking chair. The near circular form seen from the side is what makes the design unique. It allows for the rocking motion without being an attachment, but instead flowing into the rest of the chair.