Have you considered using a metal rotor, with plastic insulating hub? I
have done this on my last several coils, including a propeller style spark
gap. These designs can remove all high rotational forces from the plastic,
while still using their high dielectric strength. If you are using a metal
disk and really don't want surface tracking from the stationary electrodes
to the rotor, use a thin plastic cover sheet, held down by the flying
electrode mounts. Or you can make what I call a rotary static gap, where
you just spin a solid metal disk as the center electrode in a three
electrode static gap.
- Jason
On Sun, Nov 24, 2013 at 5:10 PM, Phillip Strauss <pstrauss1947@xxxxxxxxx>wrote:
>
> Hello all,
> I have made rotors from various grades of Tufnol and G10.
> Although I wouldn't normally dream of using a thermoplastic, some research
> into acetal (Delrin) suggests that apart from being an excellent insulator
> and easily machined it has a high melting point and is very rigid.
> Any thoughts from the list greatly appreciated,
> Regards.
> Phillip.
> _______________________________________________
> Tesla mailing list
> Tesla@xxxxxxxxxx
> http://www.pupman.com/mailman/listinfo/tesla
>
_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla