Good to see your not just this time i need help with this and the future maybe here with this, I thing the geometery as you said is the most important part the size of the ring and the wing need to be perfect just like nature is perfect.
We need someone good at maths for the ring total area and wire size.
Im getting a signal generater for this too.
Randy...... making a vortex is the point to this geeting the aether moving then pulling it a part, maybe at the center of the ring the stuff ben linked to may have the answer for the geometry on the final setup.
take care
Richard x