Wells turbine customizable

This design is a 3D printable model of the classical Wells Turbine with static blades.
*Please also note my newer [3D printable design of a self-adaptive Wells Turbine from 2025](https://www.thingiverse.com/thing:6921560). *

Turbines of this kind may be operated in bidirectional airflows and are the heart of OWC (Oscillating Water Column) wave power plants.
Printing the STL files you'll get a properly designed turbine with an outer diameter of 113 mm and an 8 mm axes bore. To run it, you'd put it on an axis into a tube and power it with an ordinary vacuum cleaner or - better - a leaf vac or with compressed air from either side.

Use the 3-blade design for highest airflows (leaf vac) and the 7-blade design for low and middle airflows (house vacs). To give the design a fairly good starting behavior (which is an issue with this turbine type) I used appropriate NACA airfoil data in the blade and cap design.

Have also fun with two of my videos showing this kind of turbiine in a