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Re: Can you have too much air through a SG? (fwd)





---------- Forwarded message ----------
Date: Fri, 13 Feb 1998 09:49:41 +1200
From: Malcolm Watts <MALCOLM-at-directorate.wnp.ac.nz>
To: Tesla List <tesla-at-pupman-dot-com>
Subject: Re: Can you have too much air through a SG?

Hi Mike,

> From:  Mike Harrison [SMTP:wwl-at-netcomuk.co.uk]
> Sent:  Wednesday, February 11, 1998 11:55 AM
> To:  tesla-at-poodle.pupman-dot-com
> Subject:  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? - I'll be initially running 7KV at
> about 30mA from a conventional (i.e. not neon) transformer , hopefully
> 9KV when I can get a microwave tranny to put in series. 
> Do I need to put a speed control on the fan?

Mightn't be a bad idea. I have seriously degraded gap performance by 
blowing a high pressure jet of air through it but this was something 
of an extreme experiment in investigations relating to quench issues.

Malcolm