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Re: Rotating spark-gap materials?



Hi Chuck,
  
> ....I was planning on using a 13" diameter G-10 glass epoxy disk and
> ran the numbers on it.  My calculation showed a stress of about 8300
> psi at 10,000 RPM.  I don't know if I'll ever need that speed, but
> that is the worst case for the disk.  G-10 material has a tensile
> strength of 38,000 psi so for this situation things look O.K.

I looked into G-10 myself and found some differences in my rating chart.
This is from the Special Material division of Westinghouse, tradename
Micarta.  Their G-10 is rated for 50,000 psi, with the grain.  However,
they don't say what the tensile strength is across the grain.  Is that
what the 38,000 psi figure is?

Scott Myers