Fully parametric vertical axis wind turbine (VAWT)

thingiverse

This is a fully parametric vertical axis twisted savonius type wind turbine inspired by these commercial turbines http://www.windside.com Settable parameters include height, radius, number of segments, wing thickness, hub diameter, hub hole diameter and base thickness. Given that each segment is divided into two parts, quite large turbines can be printed on a standard fdm printer. I have included stl files for four different sizes: a small one-segment 120x80mm turbine, a medium three-segment 240x120mm turbine, a big four-segment 420x210mm turbine, and a gigantic 840x420mm five-segment turbine that still fits on a prusa mk2s. Any other size can be obtained by opening the included FreeCAD source and setting the parameters in the config spreadsheet. The parts need to be glued together for strength. A new version with probably higher efficiency is available at https://www.thingiverse.com/thing:3376181, featuring the same dimensions but using more plastic.