Very clever! What fluid are you going to use to drive the turbine? Air,
I hope. As I recall the usual magnetic coating is not water proof and
the aluminum plates don't like moisture. I think newer drives use
polished glass plates.

I love it when someone is able to put trash to a good use!

When you get ready to scale the turbine up a bit, I have several 10mb
14"-16" disks from an old DEC computer. I am not sure if I have any
hubs or not.

Paul