G10 -vs- Lexan and SRSG questions

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Original poster: "Kent Vander Velden by way of Terry Fritz <twftesla-at-qwest-dot-net>" <graphix-at-iastate.edu>


  A recent message has made me reconsider if Lexan is a good choice for
a SRSG rotor.  After making the protective shield from 1/2" Lexan I
will have a section left over that could be used to make a 6" rotor.
Is it likely the Lexan will fail when used as a rotor and I should
instead use 1/2" G10?  Also, why do so many people use such large rotors
(12" or so)?  I have a 1/2HP motor which will likely be overkill for a
6" rotor.  Is there a reason to have a larger rotor?  Is G10 as easy to 
machine (e.g. turn in a lathe to true up the disk) as Lexan?  I will
be using parallel 15KV NSTs.

  Thanks.

---
Kent Vander Velden
kent-at-iastate.edu