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Re: Can you have too much air through a SG? (fwd)
---------- Forwarded message ----------
Date: Fri, 13 Feb 1998 05:04:00 -0500
From: Jim Buck <jimbuck1-at-bellsouth-dot-net>
To: Tesla List <tesla-at-pupman-dot-com>
Subject: Re: Can you have too much air through a SG? (fwd)
Tesla List wrote:
>
> ---------- Forwarded message ----------
> Date: Thu, 12 Feb 1998 12:03:19 +0000
> From: Greg Leyh <lod-at-pacbell-dot-net>
> To: Tesla List <tesla-at-pupman-dot-com>
> Subject: Re: Can you have too much air through a SG?
>
> > I've just built a R.Quick style cylindrical gap for my first coil,
> > using a 4" pipe and 22mm copper tubes, with a VERY powerful 9" EBM
> > centrifugal fan I had lying around, boxed up to route the air through
> > the PVC pipe. If I had a tennis ball handy, it'd probably float on the
> > airflow - seriously windy!
> > Obviously you can never have too much cooling, but can excessive
> > airflow impair gap performance?
>
> The 160kW Heise coil in Germany (circa 1964) used a
> massive single static gap, "with a supersonic blast
> of air directed diagonally across the gap".
>
> More air velocity is probably better.
>
> -GL
I built a series static gap for my large coil by bolting copper pipes
accross the output of a squirrel cage fan from a furnace. I have to
reduce the airflow through the gaps by bleading off some of the
pressure. At the reduced pressure the gaps fire at the shortest points
between the pipes and it works fine. But when I have to much pressure
the point where the gaps fire moves; effectivly making the gap spacing
much larger and unstable.
Jim Buck