Okay, so I've done a few tests and crunched some numbers, please feel free to correct me if you see any errors in calculation.
With single rotor, spinning at 130 RPM by a 90 turn coil of 20 AWG wire yielded 0.1V.
Being able to keep up around 540 rpm on my bike, I hypothesize:
540/130=4.143
Assuming 2 rotors would double the output, and I would have 6 coils... (0.1V X 2)X 6 = 1.2V at 130 RPM
Since I can achieve an RPM 4.143 time greater than 130... 1.2V X 4.143 = 4.98V.
This assumption could be entirely false, as my numbers are all based on the understanding that the output scales equally with the increase of RPM and number of coils.
So, at 4.98V being created I'm pretty happy with the outcome for a summer project.
But now on to bigger and better things, would my next tactic be to lower the size of the coil allowing for more turns and increased voltage? Or have I reached the limits of this project with the items I have now.
As always, thanks in advance for your insight.