Designed to help a student with a project. The wheel is designed to fit inside a water pipe. I included a PDF of the dimensions from the CAD model. It is designed for a 4" pipe - but is untested as of now. The CAD model includes some reinforcement modifications in the vanes. I've uploaded a "reinforced" model file as well.Printed in PLA with a .4mm nozzle @ .3mm layers, 70% infill, with support material generated for over 45 degree angles. Also printed a brim of 2mm to ensure it adhered to the print bed. We have not tested how it functions in a water pipe. At this point it is a concept - but it turned out cool so we shared it.