Re: Rotary Spark gaps (fwd)

["Tesla list" <tesla@xxxxxxxxxx>]

---------- Forwarded message ----------
Date: Fri, 03 Aug 2007 14:33:07 -0700
From: Ed Phillips <evp@xxxxxxxxxxx>
To: Tesla list <tesla@xxxxxxxxxx>
Subject: Re: Rotary Spark gaps (fwd)

RSG Builders,

There are other materials than G10 that can be successfully used for RSGs.
Electrical-Grade Fiberglass (GPO3) works very well, has the needed strength
and electrical properties, is easier to machine, and costs less than G10.
It is available from McMaster-Carr:  Look up their stock number 8549K47 for
an example.

--Steve Y."

	Another way to go was common in "the gold old days of spark".  Aluminum rotor with insulating hub where the stress is low.  Much easier to make and the hub can be made of anything convenient including hardwood.  Probably some extra cooling because of conduction to the rotating disk which really pumps a lot of air in the radial direction.

Ed