Re: rotery for neons (whats a sink rotery)

    Thanks for the warning! I chose polycarbonate for its shatter resistant
properties, but I neglected to account for heat. As to the sychronous motor
that I
have, it was worth a try being it was a freebie. Oh well, I guess it just
reinforces the idea that I continue to run the coil with a forced air static

                Thanks again,
                                    Jason Zuberer

Tesla List wrote:

> Original Poster: Bert Hickman <bert.hickman-at-aquila-dot-com>
> Tesla List wrote:
> >
> > Original Poster: Jason Zuberer <jason-at-vortexia-dot-com>
> >
> >     That answers a question that I had. I built a rotary gap with a 1/4 HP
> 1725
> > R.P.M. motor using 8 electrodes on a 10" polycarbonate disk. Needless to
> it
> > worked terribly (the safety gap fired more than the coild did) would taking
> it
> > down to 4 electrodes solve my problem, or is the 1725 R.P.M. causing a
> problem
> > as well?
> >
> >             Thanks,
> >                         Jason Zuberer
> >
> <SNIP>
> Jason,
> You have two problems a minor one and a BIG one....
> The 1725 RPM rotor speed will tend to cause surging as the electrode
> presentation "slips" versus the incoming waveform, leading to very
> uneven operation. Reducing the number of electrodes will actually worsen
> its performance.
> However, a much more serious serious problem is that a sparkgap rotor
> should _NEVER_, EVER, EVER be made from a thermoplastic! If the rotating
> electrodes should ever become hot enough to soften the plastic, you've
> created a rotating hand grenade. And the tensile strength of these
> materials is marginal. Only use glass epoxy or aluminum as your rotor
> material. A phenolic could be used, but may not have the tensile
> strentgh to keep the rotor from exploding at higher rotational speeds.
> -- Bert --