FWIW another design tried ~15 years ago was humdinger energy. http://web.archive.org/web/20100305210816/http://www.humdingerwind.com/ http://web.archive.org/we

FWIW another design tried ~15 years ago was humdinger energy. http://web.archive.org/web/20100305210816/http://www.humdingerwind.com/ http://web.archive.org/web/20100305210816/http://www.humding... Later on before they shut down they were selling kids kits of the windbelt idea: https://www.vernier.com/files/kidwind/humdinger_windbelt_manual.pdf https://www.vernier.com/files/kidwind/humdinger_windbelt_man...