Re: Rotary spark gap

• To: tesla-at-pupman-dot-com
• Subject: Re: Rotary spark gap
• From: Glenn <gcerny-at-megspo.megsinet-dot-net>
• Date: Thu, 19 Sep 1996 22:20:31 +0000

Re:
I built my 12 point "hot rotor" gap with a 1"  steel shaft pressed
and screwed to a 10.5" disk of al .750" thick.  The points
were set at 30 degrees in a milling machine with an 
indexing head.  The electrodes and screws were balanced
to within 1 tenth of a gram.  The wheel and shaft were
given a final shave between centers in a lathe.   The lack
of vibration is better than I had hoped for considering
it has not been sent out for balancing.  The shaft is mounted
in pillow blocks on an al plate and that is supported with
8 insulators rated at 14,400v each (4 stacks of 2).   The
rotor is belt driven off a carter 1 hp 10,000 rpm variable
speed motor at 1 to 1 ratio. 
One concern I have is the rotor "growing" due to heat from
the arcs and centrifugal force.
Hope to have some actual operating properties and a
photo or 2 for you soon.

Glenn

<< 
 All,
 	Does anybody have an opinion in regards to using
 a stainless steel spindle, with say 12 teeth, as the
 rotating part of a rotary spark gap.
 
 Big Red, HV Capacitors. Burn Baby Burn.
 ITS Member
 D. Gowin
  >>
And may I add, What about attachment of rotor to motor shaft? How is it done
well and without wobble? What type of motor, length of shaft? This is a
killer,or,I just hate to dive in to it yet.    Steve

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