Other Wind Turbines is a tribute to the inventors, entrepreneurs, researchers, and companies that have envisioned, designed, and constructed models and prototypes for wind energy systems. There are numerous concepts and ideas on the ways to convert wind energy into usable energy, and this book examines the innovative, novel or unusual concepts with numerous photos and historical examples. Primarily, only prototypes that have been constructed are mentioned, although a few design concepts will be included. The wind turbines are divided by types: horizontal axis wind turbines, ducted wind turbines, vertical axis wind turbines, airborne wind turbines, and more.