Lenz2 Helical Turbine XL

This is a larger version of the Lenz2 Helical turbine I started with to see what size I can get out of my Mendel 90 reliably. It is based on my earlier work in thing http://www.thingiverse.com/thing:87819 Update 2020-02-10 There are a fewq requests for older bits and I've decided to just link to the related Google Drive folder. See if you can find it. https://drive.google.com/drive/folders/0B0wheAwr-dLxMGtvNGRocEhBU2s?usp=sharing 2018-06-22: Updated the OpenScad, and it should actually fit together without issue. Currently I'm not using the LG drive unit yet but a Hobbyking 53kV 4008 Gimbal motor (~25$) with a 17T pulley and a 112T pulley on the axle. That is good for a 5.8:1 ratio and at 150rpm that is good for ~38 volts open circuit. It is enough to trigger the Chinese grid-tie 22-60V inverter. A Hobbyking 6508 (30kV) Gimbal motor should be arriving soon which should make the motor pulley a bit easier to size. The current T5 belt is a T5-600-10, which is a bit short, a 690 is on order. I did try to model the Lenz2 blade in Openscad but it is a bit heavy, so commented out. I need to do this with a proper OpenScad module which needs a bit more research. Alternatively I could just import a rendered STL of the blade. 2018-06-12: Redesigned most of the rotating parts of the turbine into OpenScad. Took far less time then I thought, but not trivial. This is once more for the LG direct drive washing machine motor. And with the design now in OpenScad format it's far easier to adapt. Ideally you should use a 6006 bearing with a 30mm ID and 55mm OD. But I had a 6806 lying which is not well suited but will do for testing. I have not printed any of the parts yet as I came to find out that Autodesk has ruined another great product (Netfabb basic) and removed the ruler to take dimensions. There are old versions on the net, but this is just silly. The design is cheaper to make as the bearings are cheaper and standard size, the axle is plain central heating t