I think of building a Tesla turbine out of old hard drives.
Now I wonder how to cut ventilation holes in the platters.
On the internet there are a lot of different attempts on that matter. A lot of people cut 3 arcs of 60° somewhere near the center of the platters, others cut round holes of different sizes inside the platters. But to me it seems like the decission on how to cut the holes, for a lot of people is very much a matter of personal flavour.
I didn't find any information yet on
- What's the best shape for the holes
- What's the best distance from the center
- What's the best diameter for the holes
(if that matters, my hard drive platters have a diameter of 9.5cm, but maybe in the end I will use different ones)
If round holes are not the best solution, I would also be interested on how "bad" it is to make round holes, as I don't have easy access to a rotary table.