Re: Poynting Vector Vortex Experiment

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Malcolm Watts by way of Terry Fritz <twftesla-at-qwest-dot-net>" <m.j.watts-at-massey.ac.nz>

Hi Ed,

On 10 Mar 2002, at 19:12, Tesla list wrote:

> Original poster: "Ed Phillips by way of Terry Fritz <twftesla-at-qwest-dot-net>"
<evp-at-pacbell-dot-net>
> 
> > Are helical sparks observed in discharges extending sideways from the
> > terminal or those extending vertically? I haven't seen any notable
> > ones in my coiling so would appreciate the benefit of other's
> > observations.
> > 
> > Thanks,
> > Malcolm
> 
> 	Are those really helical sparks, or are they an optical illusion or
> artifact of the two-dimensional photograpy?  There's a lot of motion in
> the streamers, almost any discharge shows "banjo" effects etc.which
> might confuse the camera and possibly the eye.  I see similar stuff here
> but never looked helical to me.
> 
> Ed

I visited the website and had a close look. They really do appear to 
be spirals. Interestingly, the spiral effect appears most 
dramatically where the streamer current is highest. I wonder what 
that's telling us.
     Thanks to Terry for making the pics available BTW.

Regards,
malcolm