Hey, I think nearly everbody has heard about or seen an Archimedes screw. For those of you how haven't heard about it you can find more details here: https://en.wikipedia...edes'_screw I've created a small model of an archimedes screw. The Archimedes screw is created with a genericcurve for the spiral, a couple of lines and two sorts of surfaces. The model gives you the ability to change the length, outerradius, period and innerradius of the spiral and furthermore the outerthickness of the outercontour. Feel free to play around with it and try your own screws or other amazing spiral objects. Regards Karsten ArchimedesScrew.fdb